JP6148944B2 - Generator and power generation system - Google Patents

Description

  The present invention relates to a generator and a power generation system.

  In a generator having a rotor (rotor) having a magnet such as a permanent magnet and a stator (stator) having a coil, the power generation efficiency of the generator can be improved as the number of turns of the coil increases. However, when the number of turns of the coil is increased, the generator is increased in size.

  On the other hand, for example, Patent Document 1 discloses a motor that is reduced in size and improved in output by arranging a rotor-side magnet and a stator-side coil in a predetermined positional relationship. Therefore, it is considered that a generator with high power generation efficiency can be obtained by adopting the positional relationship between the magnet and coil of the motor in the generator.

  Moreover, in the above generators, it is known that cogging torque is generated between the rotor and the core when the rotor rotates. This cogging torque is caused by attractive force or repulsive force generated between the rotor and the magnetic pole of the core, and causes cogging in the rotation of the rotor. Therefore, the rotation of the rotor becomes unstable due to the cogging torque. With regard to this point, for example, Patent Document 2 discloses means for suppressing the cogging by making the shape of the portion to which the magnet of the rotor is attached have a predetermined shape, so that the change in magnetic flux when the rotor rotates is moderated. ing.

Japanese Patent Laying-Open No. 2006-340425 (see abstract, etc.) Japanese Unexamined Patent Publication No. 2006-101695 (see abstract, etc.)

  However, each of the above-described conventional techniques has a problem in that the structure is complicated and the cogging is not sufficiently suppressed.

  Therefore, an object of the present invention is to provide a generator and a power generation system that can sufficiently suppress cogging and can obtain large generated power without having a complicated structure.

  The present invention is made of a soft magnetic material, and includes a rotor yoke including a cylindrical nonmagnetic material portion and a multiple of 2 grooves toward the nonmagnetic material portion, and is arranged in each groove, and is NS magnetized in the axial direction. A ring-shaped rotor-side permanent magnet and a plurality of rotor-side protrusions that protrude toward the stator portion from the rotor-side permanent magnet and that are arranged at a straight line and at a constant pitch at positions separated from each other across the rotor-side permanent magnet A ring-shaped non-magnetic body permanent magnet provided in the non-magnetic body portion and NS-shaped in a radial direction between the rotor-side permanent magnets in the axial direction; A stator yoke, a stator yoke that protrudes toward the rotor, and is arranged in a straight line at a constant pitch at positions separated from each other, and is wound in the circumferential direction on the opposite side of the stator protrusion. A stator side coil The Ranaru stator member, a stator portion that stator-side protruding portion is so shifted by a half pitch from each other between the stator member axially adjacent, and has a.

  Further, in the above-described generator, the rotor-side coil wound in the circumferential direction in a space where the non-magnetic body-internal permanent magnet in the non-magnetic body portion does not exist, and the rotor-side permanent magnet facing the rotor-side permanent magnet in the axial direction. It is preferable that the magnetic force of the rotor-side permanent magnet is stronger than the magnetic force of the stator-side permanent magnet.

  Alternatively, the present invention is a rotor yoke comprising a soft non-magnetic body and having a cylindrical non-magnetic body portion and a multiple of two grooves toward the non-magnetic body portion, and is disposed in each groove, and NS magnetization is applied in the axial direction. Ring-shaped rotor-side permanent magnets that are made, and a plurality of rotor sides that protrude toward the stator side of the rotor-side permanent magnets and that are arranged at a fixed pitch in a straight line at positions separated from each other across the rotor-side permanent magnets A rotor part having a projecting part, a stator magnetic part, a stator yoke, a stator side projecting part projecting toward the rotor part side, arranged in a straight line at a constant pitch at positions separated from each other, and a stator side projecting A stator member comprising a stator side coil wound in the circumferential direction on the opposite side of the portion, and a stator portion in which the stator side protrusions are shifted from each other by a half pitch between the stator members adjacent in the axial direction; Have Furthermore, it has a ring-shaped stator side permanent magnet facing the rotor side permanent magnet and magnetized in the opposite direction to the rotor side permanent magnet in the axial direction, and the magnetic force of the rotor side permanent magnet is the same as that of the stator side permanent magnet. It is stronger than magnetic force.

  In the above-described generator, a non-magnetic body portion is installed in a multiple, and each non-magnetic body portion extends in the axial direction so as to connect two adjacent rotor-side permanent magnets, and the length thereof is on both rotor sides. It is preferable that the distance is greater than or equal to the distance between both outer ends in the axial direction of the permanent magnet.

  Alternatively, the present invention is a rotor yoke comprising a soft non-magnetic body and having a cylindrical non-magnetic body portion and a multiple of two grooves toward the non-magnetic body portion, and is disposed in each groove, and NS magnetization is applied in the axial direction. A ring-shaped rotor-side permanent magnet, and a plurality of rotor-side protrusions that protrude to the stator portion side with respect to the rotor-side permanent magnet and are disposed at positions separated from each other across the rotor-side permanent magnet. The rotor-side protrusions arranged between the rotor-side permanent magnets are provided in the rotor-side protrusions and the non-magnetic body parts that are offset from each other by a half pitch at a position that bisects the axial length thereof, A ring-shaped non-magnetic body permanent magnet with NS magnetized in the radial direction provided between the rotor-side permanent magnets in the axial direction and a space in the non-magnetic body part in which there is no non-magnetic body permanent magnet in the circumferential direction A rotor side coil wound around A stator yoke, a stator yoke, a ring-shaped stator-side permanent magnet facing the rotor-side permanent magnet and magnetized in the opposite direction to the rotor-side permanent magnet in the axial direction, and the stator side A stator-side protruding portion that protrudes toward the rotor portion side from the permanent magnet and is arranged at a constant pitch in a straight line at positions spaced apart from each other by the stator-side permanent magnet, and a side facing the rotor portion of the stator-side permanent magnet A stator member comprising a stator side coil wound in the circumferential direction on the opposite side of the stator so that the stator side protrusions are arranged in a straight line at a constant pitch between the stator members adjacent in the axial direction. And a stator portion.

  At this time, the magnetic force of the rotor-side permanent magnet is preferably stronger than the magnetic force of the stator-side permanent magnet.

  Further, in the above-described generator, the area of the portion where the rotor side protruding portion and the stator side protruding portion face each other and the area of the portion which does not face each other are constant regardless of the positional relationship in the rotational direction between the rotor portion and the stator portion. It is preferable to set so as to be.

  According to another aspect of the present invention, the generator of the present invention, the first converter for inputting the generated power of the stator side coil of the generator, and the generated power of the rotor side coil provided on the rotor side of the generator are input. The power generation system includes a second converter, and an inverter that inputs the output of the first converter and the output of the second converter in parallel and outputs AC power.

  Or another viewpoint of this invention is connected to the generator of this invention, the connection means of the 1st apparatus connected to the stator side coil of a generator, and the rotor side coil provided in the rotor side of a generator. A second device connecting means.

  According to the present invention, it is possible to realize a generator and a power generation system capable of sufficiently suppressing cogging and obtaining large generated power without having a complicated structure.

It is a figure which shows the principal part of the generator which concerns on embodiment of this invention in the cross section containing the central axis of a rotor part. FIG. 2 is a partially cutaway perspective view showing a configuration of a stator portion of the generator of FIG. 1, and also shows a rotor portion and its insertion direction. FIG. 2 is a partially cutaway perspective view showing a configuration of a rotor portion of the generator of FIG. 1. It is a figure which shows the positional relationship of the circumferential direction (rotation direction) of the rotor side protrusion part (solid line) of the rotor part of FIG. 1, and the stator side protrusion part (broken line) of the stator part of FIG. It is a figure which shows the predetermined positional relationship S1 of the rotor side protrusion part (solid line) of the rotor part of FIG. 1, and the stator side protrusion part (broken line) of the stator part of FIG. It is a figure which shows typically the state of the magnetic path in a generator in state S1 which is the predetermined positional relationship of FIG. It is a figure which shows state S2 which is the predetermined positional relationship of the rotor side protrusion part (solid line) of the rotor part of FIG. 1, and the stator side protrusion part (broken line) of the stator part of FIG. FIG. 8 is a diagram schematically showing a state of a magnetic path in the generator in a state S2 having a predetermined positional relationship in FIG. 7 cut along a line AA in FIG. It is a figure which shows state S3 which is the predetermined positional relationship of the rotor side protrusion part (solid line) of the rotor part of FIG. 1, and the stator side protrusion part (broken line) of the stator part of FIG. It is a figure which shows typically the state of the magnetic path in a generator in state S3 which is the predetermined positional relationship of FIG. It is a figure which shows the change of the positional relationship with progress of time (time t1-t5) of the rotor side protrusion part (solid line) of the rotor part of FIG. 1, and the stator side protrusion part (broken line) of the stator part of FIG. It is a figure which shows typically the generation | occurrence | production state of the alternating current in the two stator side winding parts in a generator in progress of time (time t1-t5) of FIG. It is a figure for demonstrating the process in which the direction of the magnetic path in the winding part by the side of a stator reverses. It is a partially notched perspective view which shows the structure of the rotor part and stator part of the generator which concern on other embodiment. It is a figure which shows the principal part of the generator which concerns on a comparative example by the cross section containing the central axis of a rotor part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the magnetic flux is a bundle of magnetic lines of force, and the magnetic path is a path of magnetic lines of force. Further, the expression that a magnetic path is formed by magnetic flux may be replaced when a magnetic path is formed by magnetic lines of force.

  The generator 1 which concerns on embodiment of this invention has the rotor part 2 and the stator part 3, as shown in FIGS. The rotor unit 2 includes a rotor yoke 4 made of a cylindrical soft magnetic material. In the rotor yoke 4, there are provided a cylindrical hollow portion 5 having a square cross section, and two grooves 6 </ b> U and 6 </ b> L provided in the circumferential direction while penetrating from the outer peripheral surface “a” of the rotor yoke 4 to the hollow portion 5. . A ring-shaped permanent magnet 7U is provided so as to be sandwiched between the wall surfaces of the groove 6U, and a ring-shaped permanent magnet 7L is also provided so as to be sandwiched between the wall surfaces of the groove 6L. The hollow portion 5 extends in the axial direction so as to connect two adjacent permanent magnets 7U and 7L, and the length thereof is equal to or greater than the distance between both outer ends of the permanent magnets 7U and 7L in the axial direction. Further, the hollow portion 5 is provided with a ring-shaped permanent magnet 7C which is NS-magnetized in the radial direction between the arrangement positions of the permanent magnet 7U and the permanent magnet 7L. In this embodiment, the inner peripheral side is magnetized to the N pole and the outer peripheral side is magnetized to the S pole.

  The rotor yoke 4 has a plurality of rectangular parallelepiped protrusions 8U made of a magnetic material on the upper side in the axial direction of the permanent magnet 7U in FIGS. 1 to 3, and the lower side of the permanent magnet 7L in the axial direction in FIGS. A plurality of rectangular parallelepiped protrusions 8L made of a magnetic material are provided, and a plurality of rectangular parallelepiped protrusions 9 made of a magnetic material are provided between the permanent magnets 7U and 7L. The outer peripheral surfaces of the protrusions 8U, 9, 8L are the outer peripheral surface a of the rotor yoke 4. The protrusions 8U, 9, 8L are arranged so as to be equiangularly spaced with respect to the central axis C of the rotor yoke 4 and to be linear in the axial direction.

  A rotation shaft 10 is provided at the center of the rotor yoke 4. The portions where the rotor yoke 4 and the rotating shaft 10 are in contact are joined together, and the rotor yoke 4 also rotates as the rotating shaft 10 rotates. The shape seen from the axial direction of the outer peripheral surface a of each protrusion 8U, 9, 8L is circular. Although the one-stage rotor yoke 4 is illustrated in the example of FIGS. 1 to 3, a plurality of rotor yokes 4 may be stacked in the axial direction. As a result, when the grooves 6U and 6L are made into one set, they are installed by an integral multiple as in two sets and three sets (that is, the grooves 6U and 6L are set in multiples of 2), and two hollow portions 5 are provided. It is installed in the axial direction by an integer multiple so that there are three. Accordingly, a plurality of pairs of stator yokes 12U and 12L, which will be described later, are stacked.

In FIGS. 1 to 3 are omitted illustration of the housing of the generator 1, the housing, the protrusion 8U rotor portion 2, 9,8L and protrusions 16U ₁ of the stator portion 3, which will be described later, 16U _The rotor part 2 and the stator part 3 are accommodated so that ₂ , 16L ₁ and 16L ₂ maintain a slight gap. In addition, the rotating shaft 10 protrudes directly from the casing or indirectly through a toothed wheel train, and when the rotating torque is applied to the rotating shaft 10 from the outside, the rotor portion 2 It rotates with the rotating shaft 10 inside the part 3. The protrusions 8U, 9, and 8L are manufactured by integral molding with the main body of the rotor yoke 4, and the protrusions 16U ₁ , 16U ₂ , 16L ₁ , and 16L ₂ described later are also integrally molded with the stator yokes 12U and 12L, respectively. It is manufactured.

  In the example of FIGS. 1 to 3, the rotor unit 2 has an upper end surface of the upper permanent magnet 7 </ b> U having an N pole, a lower end surface having an S pole, and an upper end surface of the lower permanent magnet 7 </ b> L having an S pole. Yes, and the lower end surface is an N pole. That is, the ring-shaped permanent magnets 7U and 7L are both NS magnetized in the axial direction, and are arranged so that the opposing surfaces of the two permanent magnets 7U and 7L have the same polarity. Further, the permanent magnet 7C is NS magnetized in the radial direction, and is arranged so that the rotating shaft 10 side has an N pole and the protruding portion 9 side has an S pole.

  When the rotor portion 2 is a single unit, that is, when the stator portion 3 is not considered, the magnetic flux of the upper permanent magnet 7U flows through the protruding portion 8U to the protruding portion 9 and returns to the S pole. At the same time, the magnetic flux of the lower permanent magnet 7L passes through the protruding portion 8L, flows into the protruding portion 9 and returns to the S pole when the stator portion 3 is not considered. The magnetic flux of the permanent magnet 7C is added to the magnetic flux of the permanent magnet 7U above the permanent magnet 7C, and is added to the magnetic flux of the permanent magnet 7L below the permanent magnet 7C.

  In the rotor portion 2 according to the embodiment of the present invention having such a configuration, when the stator portion 3 is not considered, the magnetic flux is always radiated from the protruding portions 8U and 8L and is incident on the protruding portion 9. By forming such protrusions 8U, 9, and 8L, the density of magnetic flux can be increased and the attractive force can be increased.

  Further, in the hollow portion 5 of the rotor portion 2, winding portions 18U and 18L around which wires are wound in the circumferential direction are provided. The winding portions 18U and 18L in the hollow portion 5 are divided vertically by the presence of the permanent magnet 7C. At this time, the upper winding portion 18U and the lower winding portion 18L of the permanent magnet 7C may be connected in series to form one winding portion, or the upper winding portion of the permanent magnet 7C. 18U and lower winding portion 18L may be electrically separated to form two winding portions. Although illustration is omitted, the ends of the wires of the winding portions 18U and 18L are taken out to the outside and can be electrically connected to an external device or a battery.

  In order to realize such a configuration, any existing technique may be applied. For example, the rotary shaft 10 is constituted by a hollow pipe-like member, and the ends of the wires of the winding portions 18U and 18L are drawn out through the hollow rotary shaft 10 to the outside. The end of the wire drawn to the outside through the hollow rotating shaft 10 can be electrically connected from the outside via a slip ring that can transmit electric power between the stationary body and the rotating body. To do. Thereby, the electric power generated in the generator 1 is led out from the wires of the winding portions 18U and 18L.

  The stator portion 3 has a two-stage stacked structure in which stator yokes 12U and 12L made of a cylindrical soft magnetic body having a columnar hole 11 for inserting the rotor portion 2 at the center are stacked in the axial direction. It has become. In the present specification, for convenience of explanation, the stator yokes 12U and 12L are described as “two-layered structure”. However, in practice, a portion corresponding to the stator yoke 12U and the stator yoke 12L are connected to one yoke member. Corresponding portions may be formed, or two stator yokes 12U and stator yokes 12L formed separately may be actually joined in two stages. Further, as described above, when the rotor yoke 4 is stacked in a plurality of stages in the axial direction, a plurality of pairs of the stator yokes 12U and 12L are stacked in the axial direction.

  In the stator yokes 12U and 12L of the stator part 3, ring-shaped hollow parts 13U and 13L each having a square cross section, and through the inner peripheral surface (hole 11 side) of the stator yokes 12U and 12L to the hollow parts 13U and 13L In addition, ring-shaped grooves 14U and 14L provided in a circumferential shape are provided. A ring-shaped permanent magnet 15U is mounted in the groove 14U of the stator yoke 12U, and a ring-shaped permanent magnet 15L is mounted in the groove 14L of the stator yoke 12L. The permanent magnets 15U and 15L are magnetized with a polarity opposite to that of the permanent magnets 7U and 7L of the rotor portion 2 facing the permanent magnets 15U and 15L. That is, the permanent magnets 7U and 7L of the rotor portion 2 are magnetized as N, S, S, and N from the top of the figure, whereas the permanent magnets 15U and 15L of the stator portion 3 are S and N from the top of the figure. , N, and S are magnetized.

  Further, the magnetic force of the permanent magnets 7U and 7L of the rotor part 2 is stronger than the magnetic force of the permanent magnets 15U and 15L of the stator part 3. That is, the magnetized areas of the permanent magnets 7U and 7L of the rotor part 2 are wider than the magnetized areas of the permanent magnets 15U and 15L of the stator part 3. More specifically, the height (thickness) of the ring of the permanent magnets 7U and 7L is the same as the height of the ring of the permanent magnets 15U and 15L, but the width of the ring of the permanent magnets 7U and 7L is the same as that of the permanent magnet 15U. , Wider than the ring width of 15L.

Projection 16U _{1 made of} a magnetic body arranged in two stages in the vertical direction so as to sandwich the permanent magnet 15U in the axial direction on the inner surface of the hole 11 (see FIG. 2), that is, the stator yoke 12U. , 16U ₂ are provided. Similarly, the inner surface of the stator yoke 12L is provided with protrusions 16L ₁ and 16L ₂ made of magnetic bodies arranged in two stages in the vertical direction so as to sandwich the permanent magnet 15L in the axial direction. Yes. The inner peripheral surface b of each protrusion 16U ₁ , 16U ₂ , 16L ₁ , 16L ₂ is configured to face the outer peripheral surface a of the rotor yoke 4. Incidentally, since each protrusion 8U of the rotor portion 2, the tip shape as viewed in the axial direction of 9,8L has an arcuate convex shape, the protruding portions of the stator unit _{3 16U 1, 16U 2, 16L} 1, The tip shape seen from the axial direction of 16L ₂ is a concave arc shape so as to receive the arc-shaped projecting surfaces of the projecting portions 8U, 9 and 8L.

The protrusions 16U ₁ and 16U _{2 of the} stator yoke 12U and the protrusions 16L ₁ and 16L ₂ of the stator yoke 12L are arranged so as to be shifted from each other by a half pitch in the circumferential direction with respect to the central axis of the stator yokes 12U and 12L. Yes. Further, the protrusions 16U ₁ and 16U ₂ are arranged at equiangular intervals with respect to the central axis of the stator yoke 12U in the circumferential direction along the inner surface of the stator yoke 12U, and within the protrusions 16U ₁ and 16U ₂ . protrusions adjacent to have the width equal length intervals and length of the peripheral surface b 16U _1, 16U ₂ are arranged to be formed. The protrusions 16L ₁ and 16L ₂ are formed in the same manner as the protrusions 16U ₁ and 16U ₂ , but the protrusions 16L ₁ and 16L ₂ and the protrusions 16U ₁ and 16U ₂ are formed so as to be shifted by a half pitch as described above. ing.

  Further, in the ring-shaped hollow portions 13U and 13L of the stator yokes 12U and 12L, winding portions 17U and 17L each having a wire wound in the circumferential direction so as to surround the rotor portion 2 are provided. The winding portion 17U has multiple wires wound in the circumferential direction, and both ends (not shown) are drawn outward from the stator yoke 12U. Similarly, in the winding portion 17L, multiple wires are wound in the ring-shaped hollow portion 13L, and both ends (not shown) are drawn outward from the stator yoke 12L. Electric power generated in the winding portions 17U and 17L of the generator 1 is led out from each wire.

  In the example of FIGS. 1 and 2, the upper end surface of the permanent magnet 15U of the stator yoke 12U is an S pole and the lower end surface is an N pole. Temporarily, in the stator yoke 12U in a state where the rotor portion 2 is not inserted into the hole 11, the stator yoke 12U usually passes from the N pole on the lower end surface of the permanent magnet 15U through the inner peripheral surface and the inside of the stator yoke 12U. Bent from the vicinity of the boundary between the stator yoke 12U and the stator yoke 12L, bent outward from the center of the stator yoke 12U, bent at a position on the outer peripheral side, along the outer peripheral surface, and inside the outer peripheral side. Through the upper end surface and through the inside of the upper end toward the inside in the radial direction, bent down at the inner peripheral side position, and lowered to the south pole of the permanent magnet 15U. A magnetic path to return to is formed (not shown). In addition to this magnetic path, a part of the magnetic flux is emitted from the stator yoke 12U near the north pole of the permanent magnet 15U to the hole 11 side and forms a magnetic path returning to the stator yoke 12U near the south pole of the permanent magnet 15U. To do.

  At the same time, in the example of FIGS. 1 and 2, the lower end surface of the permanent magnet 15L of the stator yoke 12L is an S pole and the upper end surface is an N pole. Temporarily, in the stator yoke 12L in a state where the rotor portion 2 is not inserted into the hole 11, the stator yoke 12L normally passes from the N pole on the upper end surface of the permanent magnet 15L through the inner peripheral surface and the inside of the stator yoke 12L. Is bent from the vicinity of the boundary between the stator yoke 12L and the stator yoke 12U, bent outward from the center of the stator yoke 12L, bent at a position on the outer peripheral side, along the outer peripheral surface, and inside the outer peripheral side. It goes down, bends at the lower end side, bends along the lower end surface and through the inside of the lower end toward the inside in the radial direction, bends and rises at the inner peripheral side position, and becomes the S pole of the permanent magnet 15L. A returning magnetic path is formed (not shown). In addition to this magnetic path, a part of the magnetic flux is emitted from the stator yoke 12L near the N pole of the permanent magnet 15L to the hole 11 side and forms a magnetic path that returns to the stator yoke 12L near the S pole of the permanent magnet 15L. To do.

The protrusions 16U ₁ and 16U ₂ of the stator part 3 shown in FIG. 1 are not opposed to the protrusions 8U and 9 of the rotor part 2 (at this time, in FIG. 1, the stator yoke 12U of the protrusions 16U ₁ and 16U ₂ ) Is shown by a solid line). On the other hand, the protrusions 16L ₁ and 16L ₂ of the stator part 3 shown in FIG. 1 are opposed to the protrusions 9 and 8L of the rotor part 2 (at this time, in FIG. 1, the stators of the protrusions 16L ₁ and 16L ₂ are The root of the yoke 12L is indicated by a broken line). In the generator 1 Thus, the rotor portion 2 protrusion 8U, 9,8L, when you are completely opposed to the protrusion 16L _1, 16L ₂ of the stator yoke 12L is protruded portion 16U ₁ of the stator yoke 12U, There is no portion facing 16U _{2 at} all.

As shown in FIG. 4, the generator 1 rotates the rotor yoke 4 of the rotor portion 2 with the rotation of the rotary shaft 10, so that the protruding portions 8 U, 9, 8 L of the rotor portion 2 become the protruding portions 16 U of the stator portion 3. ₁ , 16 U ₂ , 16 L ₁ , 16 L ₂ passing through the circumferential direction. Due to the change in magnetic flux generated at this time, electric current flows through the winding portions 17U and 17L of the stator portion 3 and the winding portions 18U and 18L of the rotor portion 2 to generate power. By appropriately taking out the current flowing through the winding portions 17U and 17L and the winding portions 18U and 18L, the generator 1 can store electricity or drive a load. The area of the portion where the protrusions 8U, 9, 8L of the rotor portion 2 and the protrusions 16U ₁ , 16U ₂ , 16L ₁ , 16L _{2 of the} stator portion 3 face each other and the area of the portion which does not face the rotor portion 2 Regardless of the positional relationship between the stator portion 3 and the stator portion 3 in the rotational direction, they are constant.

For example, as shown in FIG. 5, the protrusions 16U ₁ , 16U ₂ of the stator part 3 are not opposed to any of the protrusions 8U, 9, 8L of the rotor part 2, and are below the protrusions 9 of the rotor part 2. half facing the protrusion 16L ₁ of the stator portion 3, the protruding portion 8L of the rotor portion 2 and the state is opposed to the protrusion 16L ₂ of the stator portion 3 S1.

In such a state S1, as shown in FIG. 6, the stator yoke 12U of the stator portion 3 is not significantly affected by the attractive force of the projecting portions 8U and 9 of the rotor portion 2, and thus the permanent magnet of the stator yoke 12U. Many magnetic fluxes of 15U form a magnetic path M1 (shown by a one-dot chain line) that returns from the N pole of the permanent magnet 15U to the S pole of the permanent magnet 15U through the periphery of the hollow portion 13U. At this time, the magnetic force of the permanent magnet 7U of the rotor portion 2 forms a magnetic path M2 surrounding the hollow portion 5 and the winding portion 17L. Further, since the inner peripheral surface b of the projecting portions 16L ₁ and 16L ₂ of the stator portion 3 and the outer peripheral surface a of the projecting portions 9 and 8L of the rotor portion 2 are very close to each other, the magnetic flux of the permanent magnet 7L of the rotor portion 2 is reduced. Most of the magnetic flux of the permanent magnet 15L of the stator portion 3 flows into the rotor portion 2 while almost flowing into the stator yoke 12L side from the protruding portions 9 and 8L of the rotor portion 2.

As a result, as shown in FIG. 6, most of the magnetic flux of the permanent magnet 15L of the stator yoke 12L of the stator portion 3 flows into the protruding portion 9 of the rotor portion 2, and much of the magnetic flux of the permanent magnet 7L of the rotor portion 2 is magnetic path M3 flows into the projecting part 16L ₂ of the stator portion 3 is formed. This magnetic path M3 is illustrated as the smallest ellipse in FIG. Further, the magnetic flux of the permanent magnet 7C of the rotor portion 2, the magnetic path M4 flows into the projecting part 16L ₂ of the stator portion 3 is formed through a protruding portion 8L. Further, since the magnetic force of the permanent magnet 7L is stronger than the magnetic force of the permanent magnet 15L, a magnetic path M5 surrounding the winding portion 17L is formed. The magnetic flux of the permanent magnet 7C is also attracted by the permanent magnet 15L to form a magnetic path M4a that surrounds the winding portion 18L and the winding portion 17L.

  As described above, in the state S1, in the winding portions 17U and 17L, a change occurs that much of the magnetic flux of the permanent magnet 15L that has passed around the winding portion 17L until just before the state S1 is attracted to the rotor portion 2 side and weakens. At the same time, a magnetic path M5 is formed in a direction opposite to the direction of the magnetic flux of the permanent magnet 15L that has passed around the winding portion 17L. Further, a change occurs in which the magnetic flux of the permanent magnet 15U that has been radiated to the rotor portion 2 side just before the state S1 returns to the winding portion 17U of the stator portion 3 and becomes stronger. As a result, currents that generate lines of magnetic force flow through the winding portions 17U and 17L in a direction that prevents this change. The current flowing through the winding portions 17U and 17L will be described in detail later.

  Further, in the state S1, along with the change of the magnetic flux as described above, a current that generates magnetic lines flows in the winding portions 18U and 18L in a direction that prevents the change of the magnetic flux. Details of the current flowing through the winding portions 18U and 18L will be described later together with the current flowing through the winding portions 17U and 17L.

Further, as shown in FIG. 7, half of the protrusions 8U, 9, and 8L of the rotor portion 2 viewed from the circumferential direction are viewed from the same circumferential direction of the protrusions 16U ₁ , 16U ₂ , 16L ₁ , and 16L ₂ of the stator portion 3. Let S2 be the state facing each half. In such a state S2, as shown in FIG. 8 which is a cross-sectional view taken along the line AA in FIG. 7, the magnetic flux of the permanent magnet 15U of the stator yoke 12U is stronger than the permanent magnet 15U as compared to the state S1. Is attracted by the strong permanent magnet 7U and flows into the rotor portion 2 side, and the magnetic flux of the permanent magnet 7U of the rotor portion 2 flows into the stator portion 3 side. As a result, the N pole of the permanent magnet 7U on the rotor part 2 side is directed to the S pole of the permanent magnet 15U on the stator part 3 side, and the N pole of the permanent magnet 15U on the stator part 3 side is changed to the permanent magnet 7U on the rotor part 2 side. A magnetic path M6 toward the S pole is formed. Further, in the rotor portion 2, a magnetic path M6a is formed surrounding the winding portion 18U and the winding portion 17U from the N pole to the S pole of the permanent magnet 7C.

  Further, in the state S2, the magnetic flux of the permanent magnet 7L of the rotor unit 2 radiated to the stator yoke 12L side of the stator unit 3 in the state S1 returns to the rotor unit 2 side. Further, the magnetic flux of the permanent magnet 15L of the stator portion 3 is also drawn by the permanent magnet 7L having a stronger magnetic force than the permanent magnet 15L and flows into the rotor portion 2 side. That is, compared with the state S1, the N magnetic pole of the permanent magnet 15L on the stator portion 3 side is directed from the N pole of the permanent magnet 7L on the rotor portion 2 side to the S pole of the permanent magnet 15L on the stator portion 3 side by weak magnetic lines of force. A magnetic path M7 is formed from the permanent magnet 7L toward the S pole of the permanent magnet 7L on the rotor portion 2 side. This magnetic path M7 is weaker than the previous magnetic path M3. Further, in the rotor part 2, a magnetic path M7a is formed surrounding the winding part 18L and the winding part 17L from the N pole to the S pole of the permanent magnet 7C.

  As described above, in the state S2, compared to the state S1, a change occurs in which the magnetic flux that has passed around the winding portions 17U and 17L is weakened. Therefore, the winding portions 17U and 17L have magnetic field lines in a direction that prevents the change. Each of the currents that generate the current flows. Further, in the state S2, with the change of the magnetic flux as described above, a current that generates magnetic lines of force flows in the winding portions 18U and 18L in a direction that prevents the change of the magnetic flux.

  In the state S2, the magnetic paths M6 and M6a surrounding the winding portion 18U and the winding portion 17U in the upper half of FIG. 8 and the magnetic paths M7 and M7a surrounding the winding portion 18L and the winding portion 17L in the lower half are formed. Since the directions are opposite to each other, the generated power in these winding portions 18U, 18L, 17U, and 17L cancels each other. For this reason, power generation is not performed in state S2.

Further, as shown in FIG. 9, the protrusions 16L ₁ , 16L ₂ of the stator part 3 are not opposed to any of the protrusions 8U, 9, 8L of the rotor part 2, and the upper part of the protrusion part 9 of the rotor part 2 half facing the protrusion 16U ₂ of the stator portion 3, the protrusion 8U of the rotor portion 2 and the state is opposed to the protrusion 16U ₁ of the stator portion 3 S3.

In such a state S3, as shown in FIG. 10, the state S1 and the top shown in FIG. 6 are reversed. That is, since the stator yoke 12L of the stator portion 3 is not significantly affected by the attractive force of the protrusions 9 and 8L of the rotor portion 2, the magnetic flux from the north pole of the permanent magnet 15L passes around the winding portion 13L. Thus, a magnetic path M8 (illustrated by a one-dot chain line) returning to the S pole of the permanent magnet 15L is formed. At this time, the magnetic force of the permanent magnet 7L of the rotor portion 2 forms a magnetic path M9 that surrounds the hollow portion 5 and the winding portion 17U. Further, since the protrusions 16U ₁ and 16U _{2 of} the stator part 3 and the protrusions 8U and 9 of the rotor part 2 are very close to each other, the magnetic flux of the permanent magnet 7U of the rotor part 2 is transferred from the protrusion part 8U of the rotor part 2 to the stator. Mostly flows into the yoke 12U side.

As a result, as shown in FIG. 10, the magnetic flux of the permanent magnet 15U of the stator yoke 12U of the stator portion 3 flows into the protruding portion 9 of the rotor portion 2, and the magnetic flux of the permanent magnet 7U of the rotor portion 2 is protruded from the rotor portion 2. magnetic path M10 is formed that flows from the parts 8U the protrusions 16U ₁ of the stator portion 3. Further, the magnetic flux of the permanent magnet 7C of the rotor part 2 flows into the stator yoke 12U side via the protruding parts 9 and 8U of the rotor part 2 to form a magnetic path M11. Further, the magnetic flux of the permanent magnet 7U strong rotor portion 2 of the magnetic force than the permanent magnet 15U of the stator unit 3, the magnetic path M12 surrounding the wound portion 17U flows into the projecting part 16U ₁ of the stator portion 3 is formed. The magnetic flux of the permanent magnet 7C is also attracted by the permanent magnet 15U to form a magnetic path M11a surrounding the winding portion 18U and the winding portion 17U.

  Thus, in the state S3, in the winding parts 17U and 17L, a magnetic flux that was not present around the winding parts 17U and 17L until just before the state S3 is generated, and a change occurs in which the magnetic paths M8 and M12 are formed. According to this, currents that generate lines of magnetic force flow through the winding portions 17U and 17L in a direction that prevents this change.

  Further, in the state S3, along with the change of the magnetic flux as described above, a current for generating magnetic lines of force flows in the winding portions 18U and 18L in a direction that prevents the change of the magnetic flux. The state S3 in the winding portions 18U and 18L is a state in which the top and bottom are reversed from the state S1 shown in FIG.

11 shows the positional relationship between the protrusions 8U, 9, 8L of the rotor portion 2 and the protrusions 16U ₁ , 16U ₂ , 16L ₁ , 16L ₂ of the stator portion 3, and the above-described states S1, S2, S3 are S1 → The process of transition from S2 to S3 is shown with the passage of time t1 to t5. Further, the upper and lower diagrams of FIG. 12 show states of currents generated in the winding portions 17U and 17L of the generator 1 at respective times from time t1 to time t5 shown in FIG. Here, for convenience of explanation, description will be made by paying attention to the current output from the winding portions 17U and 17L of the generator 1, and description of the voltage will be omitted.

As shown in the upper and lower diagrams of FIG. 12, the rotor portion 2 rotates at a constant rotational speed, whereby alternating currents having the same phase are generated in the winding portions 17U and 17L. For example, in FIG. 12, time t1 corresponds to state S1 shown in FIG. At time t1, the lower half of the protruding portion 9 of the rotor portion 2 and the protruding portion 8L and the protruding portions 16L ₁ and 16L _{2 of the} stator portion 3 face each other, and the magnetic flux around the winding portion 17U is the maximum of the permanent magnet 15U. It becomes magnetic flux and then decreases. For this reason, the electric current which generates the magnetic force line of the direction which prevents the change flows through a wire in a certain direction. This point is shown as W11 in FIG. On the other hand, at this time, the magnetic flux around the winding portion 17L becomes a part of the permanent magnet 7L and then decreases, so that a current that generates magnetic lines in a direction that prevents the change flows through the wire. This point is shown as W21 in FIG. At this time, the lower portion of the rotor portion 2 generates the maximum suction force with the stator portion 3.

In FIG. 12, the time t5 corresponds to the state S3 shown in FIG. At time t5, the upper half of the protruding portion 9 of the rotor portion 2 and the protruding portion 8U face the protruding portions 16U ₁ and 16U _{2 of the} stator portion 3, and the magnetic flux around the winding portion 17L is the maximum of the permanent magnet 15L. It becomes magnetic flux and then decreases. For this reason, the electric current which generates the magnetic force line of the direction which prevents the change flows through a wire in a certain direction. This point is shown as W22 in FIG. On the other hand, at this time, the magnetic flux around the winding portion 17U becomes a part of the permanent magnet 7U and then decreases, so that a current that generates magnetic lines in a direction that prevents the change flows through the wire. This point is shown as W12 in FIG. At this time, the upper portion of the rotor portion 2 generates the maximum suction force with the stator portion 3.

Time t3 corresponds to state S2 shown in FIG. At time t3, the circumferential half of the protrusions 8U, 9, and 8L of the rotor portion 2 and the circumferential half of the protrusions 16U ₁ , 16U ₂ , 16L ₁ , and 16L ₂ of the stator portion 3 face each other. Time t3 is an intermediate point in the process of transition from state S1 to S3. Therefore, at time t3, as shown in the upper and lower diagrams of FIG. 12, no current is generated in the winding portions 17U and 17L.

  Times t2 and t4 are processes of transition from states S1 to S2 and from S2 to S3, respectively. Therefore, at the time t2, as shown in the upper and lower diagrams of FIG. 12, in the winding portions 17U and 17L, the current values generated in the state S1 and the current values generated in the state S2 are approximately intermediate values, respectively. Electric current is generated. Further, at time t4, as shown in the upper and lower diagrams of FIG. 12, the winding portions 17U and 17L each have a substantially intermediate value between the current value generated in the state S2 and the current value generated in the state S3. Electric current is generated.

  In this way, at times t1 to t5, a current corresponding to one half of the AC waveform generated in the winding portions 17U and 17L is generated. That is, when the rotating shaft 10 of the generator 1 is rotating at a constant rotation speed, one cycle of the AC waveform generated in the winding portions 17U and 17L is obtained in twice the time from time t1 to time t5. finish. In FIG. 12, the maximum current on the positive side and the maximum current on the negative side are illustrated with the same magnitude, but this is for convenience of explanation, and actually the magnetic force of the permanent magnets 7U, 7C, 7L, 15U, 15L. It varies depending on the strength of the image and the arrangement position relationship.

  Further, as shown in FIG. 11, when the rotor unit 2 rotates at a constant rotational speed from time t1 to time t5, the windings 18U and 18L have an alternating current in the same manner as the windings 17U and 17L. Electric power is generated.

  For example, in the state S1 shown in FIG. 6, the magnetic path M2 surrounding the winding portion 18U and the winding portion 18L is formed. Further, a magnetic path M4 surrounding the winding portion 18L is formed.

  In the state S2 shown in FIG. 8, the magnetic flux of the rotor portion 2 is pulled by both the stator yokes 12U and 12L, thereby forming a magnetic path M6a surrounding the winding portion 18U and a magnetic path M7a surrounding the winding portion 18L. Is done. However, since the magnetic path M6a and the magnetic path M7a have opposite magnetic flux directions, the power generated by the winding portion 18U and the power generated by the winding portion 18L are in a mutually canceling relationship. Therefore, in the state S2, power generation in the winding portions 18U and 18L is not performed.

  In the state S3 shown in FIG. 10, the magnetic path M9 surrounding the winding portion 18U and the winding portion 18L is formed. Further, a magnetic path M11a surrounding the winding portion 18U is formed.

  In this way, the amount of power generated in the winding portions 18U and 18L is maximum in the winding portion 18L and small in the winding portion 18U in the state S1. In the state S2, the power generation amount becomes zero in both the winding portions 18U and 18L. Furthermore, in state S3, current flows in the opposite direction to state S1, and the amount of power generation changes so that winding portion 18U is maximized and winding portion 18L is small. That is, when the winding portions 18U and 18L are connected in series and viewed as one winding portion, the power generation amount takes the maximum value on the negative side from the maximum value on the positive side between the state S1 and the state S3. This corresponds to a half cycle of alternating current. That is, the power generation cycle of the winding portions 18U and 18L is synchronized with the power generation cycle of the winding portions 17U and 17L. Although illustration is omitted, the state of the generated current of the winding portions 17U and 17L and the state of the generated current of the winding portions 18U and 18L shown in FIG. 12 are the same.

The upper part of FIG. 13 schematically shows the magnetic path M8 of the stator yoke 12L in the state S3. In FIG. 13, the protrusions 16L ₁ and 16L ₂ are not shown, and the strength of the suction force between the permanent magnet 15L and the permanent magnet 7L is different depending on the distance between the stator yoke 12L and the rotor yoke 4. Represents a relationship. In the upper diagram of FIG. 13, the magnetic flux of the permanent magnet 15L is not affected by other permanent magnets, and thus forms a magnetic path M8 surrounding the winding portion 17L. The middle diagram of FIG. 13 schematically shows the magnetic path M7a and magnetic path M7b of the stator yoke 12L and the rotor yoke 4 in the state S2. In the middle diagram of FIG. 13, the magnetic flux of the permanent magnet 15L is attracted by the permanent magnet 7L and enters the rotor yoke 4 side without passing through the winding portion 17L side to form a magnetic path M7a. Further, the lower diagram of FIG. 13 schematically shows the magnetic path M5 and the magnetic path M3 of the stator yoke 12L in the state S1. In the lower diagram of FIG. 13, the magnetic flux of the permanent magnet 7L enters the stator yoke 12L side to form a magnetic path M5.

  Thus, in the magnetic path M8 in the upper diagram of FIG. 13 and the magnetic path M5 in the lower diagram of FIG. 13, the direction of the magnetic field lines surrounding the winding portion 17L is opposite. By such reversal of the direction of the magnetic path, AC power is generated in the winding portion 17L. As a factor for causing such reversal of the magnetic path direction, the magnetic force of the permanent magnet 7L on the rotor side is stronger than the magnetic force of the permanent magnet 15L on the stator side.

  In this way, when the rotor unit 2 rotates, power is generated by the winding units 18U and 18L of the rotor unit 2 and the winding units 17U and 17L of the stator unit 3, respectively. In other words, in the generator 1, power generation is simultaneously performed by the four systems of winding portions 17U, 17L, 18U, and 18L. According to this, it is possible to obtain larger generated power as compared with a conventional generator that generates power only on either the rotor side or the stator side. In addition, since the stator yokes 12U and 12L are stacked in two stages, a larger amount of generated power can be obtained compared to a conventional generator having only one stage of stator yoke. Furthermore, if the number of stages of the stator yokes 12U and 12L is increased, a larger generated power can be obtained. At this time, the winding portions 18U and 18L of the rotor portion 2 are also installed in a number that is a multiple of the stator yokes 12U and 12L. Thereby, the electric power generated by the winding portions 18U and 18L can be increased by increasing the number of stages of the stator yokes 12U and 12L.

  The power generated by the winding portions 17U and 17L and the power generated by the winding portions 18U and 18L differ in the amount of power generated. Therefore, a configuration example of a power generation system for overseeing these is shown below.

  For example, the generator 1, the first and second converters that input the generated power of the winding part 17U and the winding part 17L of the generator 1, and the generated power of the winding parts 18U and 18L of the generator 1 are input. A power generation system including a third converter and an inverter that inputs the outputs of the first, second, and third converters in parallel and outputs AC power is configured.

  For example, the AC power generated by the winding portions 17U and 17L and the AC power generated by the winding portions 18U and 18L are input to three different converters to be converted into three systems of DC power. What is necessary is just to use the inverter which inputs the direct-current power of 3 systems output in parallel, respectively, and converts it into the output of 1-system alternating current power. Alternatively, a single battery that is charged with three systems of DC power output from each of the three converters can be used, and this battery can be used as a DC power source. In addition, the three systems of DC power output from the three converters may be used separately.

  Alternatively, it is connected to the generator 1, the connecting means of the first and second devices connected to the winding part 17 U and the winding part 17 L of the generator 1, and the winding parts 18 U and 18 L of the generator 1. You may comprise the electric power generation system which has a connection means of a 3rd apparatus. At this time, as connection means, for example, a terminal displaying the generated power of the winding portions 17U and 17L and a terminal displaying the generated power of the winding portions 18U and 18L may be provided on the output side of the generator 1, respectively. . Thereby, the user can visually check the display of the generated power, and connect and use a device suitable for the generated power to the terminal. Note that any connection means such as a connector or an outlet can be provided in place of the terminal.

  In this way, the power generated simultaneously by the three winding portions 17U, 17L, 18U and 18L can be effectively used as appropriate.

  As another example of the power generation system, the winding portion 17U, the winding portion 17L, or the winding portions 18U and 18L can be used alone as three systems of AC power sources.

  Furthermore, the generator 1 can suppress cogging as described below. Also by this, the generator 1 can generate electric power efficiently and can obtain large generated electric power.

Here, considering the cause of cogging in a general generator, the cause is that the attractive force or the repulsive force between the rotor side and the stator side changes depending on the position of the rotor. On the other hand, in the generator 1, the protrusions 8U, 9, 8L of the rotor part 2 and the protrusions of the stator part 3 in the positional relationship between the rotor part 2 and the stator part 3 shown at any time from time t1 to t5. The suction force between 16U ₁ , 16U ₂ , 16L ₁ and 16L ₂ is always constant. As described above, this is because the protruding portions 8U, 9, 8L of the rotor portion 2 and the protruding portions 16U ₁ , 16U ₂ , 16L ₁ , 16L _{2 of the} stator portion 3 are opposed to each other and are not opposed to each other. This is because the rotor part 2 and the stator part 3 are constant regardless of the positional relationship in the rotational direction.

For example, at time t1 (state S1), the lower half of the projecting portion 9 of the rotor portion 2 and the projecting portion 8L and the projecting portions 16L ₁ and 16L _{2 of the} stator portion 3 face _{each other} with the maximum suction force. I am inquiring. On the other hand, the protrusions 16U ₁ and 16U ₂ of the stator part 3 are not opposed to any of the protrusions 8U, 9 and 8L of the rotor part 2, and the mutual attractive force is minimum. Protrusion 8U of the rotor portion 2 side from this, suction force strength between 9,8L a protrusion 16U ₁ of the stator 3 side, 16U _2, 16L _1, 16L _2, the rotor portion 2 side Considering that it depends on the sum of the strength of the opposing area portion and the strength of the non-opposing area portion between the protruding portions 8U, 9, 8L and the protruding portions 16U ₁ , 16U ₂ , 16L ₁ , 16L ₂ on the stator 3 side. Can do.

Therefore protrusions 16U ₁ of the stator portion 3, 16U _2, 16L _1, or 16L ₂ are protrusions 8U rotor portion 2, the maximum value of the area at the time of facing the 9,8L and Qcm ² (square centimeter), 1 cm ² When the strength of the suction force per unit is P1, the facing area between the lower half of the protrusion 9 of the rotor portion 2 and the protrusion 16L ₁ of the stator portion 3 is Qcm ² and the suction force is Q at time t1. × P1. Further, in also Qcm ² attraction opposing area between the projecting portions 16L ₂ of the protruding portion 8L and the stator portion 3 of the rotor portion 2 becomes Q × P1. The non between the non-opposing area and the projection 16U ₂ of the upper half and the stator portion 3 of the protrusion 9 of the rotor portion 2 between the protrusions 16U ₁ of the protrusion 8U and the stator portion 3 of the rotor part 2 The opposing area is Qcm ² , and the suction force per 1 cm ² unit of the non-opposing part is P2, and the suction force is Q × P2. Thus, each projecting portion between the rotor portion 2 and a stator portion 3 at time _{t1 8U, 9,8L, 16U 1,} 16U 2, 16L 1, the suction force of 16L ₂ is "2Q × P1 + 2Q × P2 = 2Q (P1 + P2 ) ”.

Similarly, at time t2, a quarter in the circumferential direction of the protruding portion 8U of the rotor portion 2 and a quarter in the circumferential direction of the protruding portion 16U ₁ of the stator portion 3 face each other, and the rotor portion 2 A quarter in the circumferential direction of the upper half of the projecting portion 9 and a quarter in the circumferential direction of the projecting portion 16U ₂ of the stator portion 3 are opposed to each other in the circumferential direction of the lower half of the projecting portion 9 of the rotor portion 2. Three-quarters and three-fourths of the circumferential direction of the protruding portion 16L ₁ of the stator portion 3 face each other, and three-fourths of the circumferential direction of the protruding portion 8L of the rotor portion 2 and the protruding portion 16L _{2 of the} stator portion 3 Are opposite each other and attract each other.

Here, the opposing area between the protrusions 16U ₂ of the upper half and the stator portion 3 rotor portion projecting part 16U ₁ of 2 protrusions 8U and the stator unit 3 and the projection 9 of the rotor portion 2, respectively (1 / 4) Qcm ² , the lower half of the protruding portion 9 of the rotor portion 2 and the protruding portion 16L ₁ of the stator portion 3 and the opposing areas between the protruding portion 8L of the rotor portion ₂ and the protruding portion 16L ₂ of the stator portion 3 are ( 3/4) is a Qcm ^2. Thus, each projecting portion between the rotor portion 2 and a stator portion 3 at time _{t2 8U, 9,8L, 16U 1,} 16U 2, 16L 1, the suction force of the sum of the opposing portions of 16L ₂ is
(1/4) Qcm ² × P1 + (1/4) Qcm ² × P1 + (3/4) Qcm ² × P1 + (3/4) Qcm ² × P1
= (8/4) Qcm ² × P1
= 2Qcm ² × P1
It is. On the other hand, the suction force of the non-facing portion is calculated in the same manner and becomes 2Qcm ² × P2. Accordingly, the suction force at time t2 is “2Q × P1 + 2Q × P2 = 2Q (P1 + P2)” as at time t1.

Similarly, at time t3, a half in the circumferential direction of the protruding portion 8U of the rotor portion 2 and a half in the circumferential direction of the protruding portion 16U ₁ of the stator portion 3 face each other, and the rotor portion 2 A half in the circumferential direction of the upper half of the protruding portion 9 and a half in the circumferential direction of the protruding portion 16U ₂ of the stator portion 3 are opposed to each other in the circumferential direction of the lower half of the protruding portion 9 of the rotor portion 2. One half and _{one half in} the circumferential direction of the protruding portion 16L ₁ of the stator portion 3 face each other, and _{one half in} the circumferential direction of the protruding portion 8L of the rotor portion 2 and the protruding portion 16L _{2 of the} stator portion 3 Are opposed to each other and strongly attract each other.

Here, the protruding part 8U of the rotor part 2 and the protruding part 16U _{1 of} the stator part 3, the upper half of the protruding part 9 of the rotor part 2, the protruding part 16U ₂ of the stator part 3, and the lower half of the protruding part 9 of the rotor part 2 And the projecting portion 16L _{1 of} the stator portion 3 and the facing areas between the projecting portion 8L of the rotor portion ₂ and the projecting portion 16L ₂ of the stator portion 3 are (1/2) Qcm ² , respectively. Thus, each projecting portion between the rotor portion 2 and a stator portion 3 at time _{t3 8U, 9,8L, 16U 1,} 16U 2, 16L 1, the suction force of the sum of the opposing portions of 16L ₂ is
(1/2) Qcm ² × P1 + (1/2) Qcm ² × P1 + (1/2) Qcm ² × P1 + (1/2) Qcm ² × P1
= (4/2) Qcm ² × P1
= 2Qcm ² × P1
It is. On the other hand, the suction force of the non-opposing portion, that is, the portion where each protruding portion 16U ₁ , 16U ₂ , 16L ₁ , 16L ₂ of the stator portion 3 is not opposed to each protruding portion 8U, 9, 8L of the rotor portion 2 is opposed. Since its area is 2Qcm ² , 2Qcm ² × P2. Therefore, the total sum of the attractive forces at time t3 is 2Q (P1 + P2), similar to times t1 and t2.

Similarly, at time t4, the protrusion 8U of the rotor portion 2 circumferentially of 3 and 3 and the opposing quarter of the circumferential direction of the protruding portions 16U ₁ of the stator portion 3 of 4 minutes, of the rotor portion 2 on 3 and the opposing quarter of the circumferential direction of the 3 and the stator portion 3 of the protrusions 16U ₂ quarters of the circumferential direction of the half of the protruding portion 9, the lower half of the protrusion 9 of the rotor portion 2 circumferentially of One-fourth and one-fourth in the circumferential direction of the protruding portion 16L ₁ of the stator portion 3 face each other, and one-fourth in the circumferential direction of the protruding portion 8L of the rotor portion 2 and the protruding portion 16L _{2 of the} stator portion 3 Are opposed to each other and strongly attract each other.

Here, a quarter of the protrusion 8U of the rotor portion 2 3 and 4 minutes in the upper half of the protrusion 9 of the stator section three quarters of protrusions 16U ₁ of 3 and the rotor part 2 3 and the stators 3 The opposing areas between the projecting portions 16U ₂ and three-quarters are (3/4) Qcm ² , respectively, the lower half of the projecting portion 9 of the rotor portion 2 and the projecting portion of the stator portion 3 The opposing areas between 1/4 of 16L ₁ and 1/4 of the protrusion 8L of the rotor part 2 and 1/4 of the protrusion 16L2 of the stator part 3 are (1/4) Qcm ² , respectively. is there. Therefore, the sum of the areas of the portions of the protrusions 8U, 9, 8L, 16U ₁ , 16U ₂ , 16L ₁ , and 16L ₂ that completely face each other between the rotor portion 2 and the stator portion 3 at time t4 is:
(3/4) Qcm ² + (3/4) Qcm ² + (1/4) Qcm ² + (1/4) Qcm ²
= (8/4) Qcm ²
= 2Qcm ²
It is. Therefore, the suction force due to the protrusions facing each other is “2Q × P1”. On the other hand, the area of the portion where the protrusions 8U, 9 and 8L of the rotor part ₂ are opposed to the protrusions 16U ₁ , 16U ₂ , 16L ₁ and 16L _{2 of the} stator part 3 is 2Qcm ² , and the overall suction force is It is “2Q (P1 + P2)”, similar to the times t1, t2, and t3.

Similarly, at time t5 (state S3), the upper half of the protruding portion 9 of the rotor portion 2 and the protruding portion 8U and the protruding portions 16U ₁ and 16U _{2 of the} stator portion 3 face each other and strongly attract each other. The protrusions 16L ₁ and 16L ₂ of the stator part 3 are not opposed to any of the protrusions 8U, 9 and 8L of the rotor part 2. At this time, the opposing area between the upper half of the protrusion 9 of the rotor ₂ and the protrusion 16U _{2 of the} stator 3 and between the protrusion 8U of the rotor ₂ and the protrusion 16U ₁ of the stator 3 is Qcm ^2. It is. Therefore, the total sum of the areas of the projecting portions 8U, 9, 8L, 16U ₁ , 16U ₂ , 16L ₁ , 16L ₂ between the rotor portion 2 and the stator portion 3 at time kt5 is completely opposite to each other.
Qcm ² + Qcm ² = 2Qcm ²
It is. Therefore, the suction force due to the protrusions facing each other is “2Q × P1”. On the other hand, the area of the portion where the protrusions 8U, 9, and 8L of the rotor portion ₂ are opposed to the protrusions 16U ₁ , 16U ₂ , 16L ₁ , and 16L _{2 of the} stator portion 3 is also 2Qcm ² , and the overall suction force is Like time t1, t2, t3, t4, “2Q (P1 + P2)” is obtained.

Thus, each projecting portion between the rotor portion 2 and the stator unit 3 at any time in the time t1~t5 in FIG 11 8U, 9,8L, at _{16U 1, 16U 2, 16L 1} , 16L 2 The total suction force is “2Qcm ² × (P1 + P2)”, which is not changed. The current waveform generated at times t1 to t5 is a current waveform corresponding to a quarter cycle of the sinusoidal current waveforms generated in the winding portions 17U and 17L. The sine wave is a quarter of this current waveform. The current waveform for a period is continuous while changing the increase / decrease direction and the positive / negative direction. Therefore, the winding unit 17U, the projecting portion of the rotor portion 2 at any site of the sinusoidal current waveform generated in 17L 8U, protrusions 16U ₁ of 9,8L and the stator unit 3, 16U _2, 16L _1, 16L It is obvious that the suction force between ₂ is always constant. This means that the attractive force between the rotor unit 2 and the stator unit 3 is always constant regardless of the positional relationship between the rotor unit 2 and the stator unit 3. Thus, it can be seen that no cogging occurs in the generator 1.

  Further, in the generator 1 in which cogging does not occur in this way, most of the rotational torque applied to the rotary shaft 10 from the outside is not reduced by the cogging torque, but most of it is used as torque for power generation. High power generation.

  As a comparative example, when a rotor part 2A having no permanent magnet 7C in the hollow part 5 was produced and tested, power generation with the same waveform as described with reference to FIG. 12 could be performed. However, the power generation efficiency was low as compared with the case having the permanent magnet 7C.

(Other embodiments)
The above-described embodiment can be variously modified without departing from the gist thereof. For example, each protrusion 8U, 9,8L is body and integrally molded of the yoke 4, each of the protrusions _{16U 1, 16U 2, 16L 1} , 16L 2 yoke 12U, has been described as being integrally molded and 12L, Each projecting portion may not be integrally molded, but may be fixed to each main body by bonding or the like as a separate member.

As shown in FIG. 14, the rotor portion 2B has four protruding portions 8U ₁ , 8U ₂ , 8L ₁ , 8L ₂ in the axial direction. The protruding portions 8U ₁ , 8U ₂ and the protruding portions 8L ₁ , 8L ₂ are arranged so as to be shifted from each other by a half pitch in the axial direction. On the other hand, the stator portion 3B has three projecting portions 16U, 16M, and 16L having the same pitch in the axial direction. Even if such a generator 1B is configured, the generator 1B having the same function as the generator 1 in the above-described embodiment can be realized.

In this case, the rotor portion 2B includes a rotor member having protrusions 8U ₁ and 8U ₂ having the same pitch in the central axis direction, and a rotor having protrusions 8L ₁ and 8L ₂ having a straight line in the central axis direction and the same pitch. The members can be configured by overlapping the protrusions 8U ₁ , 8U ₂ and the protrusions 8L ₁ , 8L ₂ in two stages so as to be shifted from each other by a half pitch. Further, the stator portion 3B is also straight in the central axis direction, and is a straight line in the central axis direction with the stator member having the protruding portions 16U and 16M ₁ having the same pitch, and the protruding portion 16M ₂ having the same pitch. The rotor member having the portion 16L can be configured by arranging the protruding portions 16U, 16M ₁ , 16M ₂ , and 16L in a straight line and overlapping each other in two steps. In addition, you may comprise the rotor part 2B and / or the stator part 3B by cutting out from one yoke member.

  In addition, the generators 1 and 1B have been described as having the stator portion 3 composed of the stator yokes 12U and 12L having a two-stage stacked structure, but the number of stages to be stacked may be any number as long as it is an even number. In this case, it is preferable that the rotor portion 2 has a structure in which those shown in FIG. 14 are stacked in the axial direction. Similarly, the generator 1B has been described as having the rotor part 2B made of a rotor member having a two-stage stack structure. However, it is preferable to stack the rotor parts 2B having the same structure, and the number of stages to be stacked is an even number. Any number of stages may be used.

  The generators 1 and 1B described above are of the inner rotor type, but may be of the outer rotor type. The rotor yoke 4 and the stator yokes 12U and 12L are preferably soft magnetic materials, but may be simple magnetic materials. Further, the grooves 6U, 6L, 14U, and 14L are not formed when they are integrally formed with the permanent magnet, but are referred to as grooves including the case of such integral formation. In addition, the hollow portion 5 serving as the non-magnetic body portion has an axial length that is longer than the distance between the axial outer ends of the permanent magnet 7U and the permanent magnet 7L, but the distance between the axial outer ends. It may be the same, slightly longer, or slightly shorter. In order to make cogging zero, it is preferable that the width of the protruding portion and the width between the protruding portions are the same, but the widths of both may not be the same and may be slightly different due to other requirements.

  Moreover, as shown in FIG. 15, the generator 1C provided with the stator yoke 3CU which does not have the permanent magnets 15U and 15L in the stator part 3C can also be comprised. That is, the generator 1C uses the space after removing the permanent magnets 15U, 15L from the stator portion 3 of the generator 1 as a non-magnetic body portion. Note that the space after the permanent magnets 15U and 15L are removed from the stator portion 3 may be filled with a resin or with a non-magnetic material such as aluminum. Since the generator 1C does not have the permanent magnets 15U and 15L in the stator portion 3C, the winding portions 17U and 17L generate pulsating flows whose phases are reversed.

For example, in the generator 1C in the state shown in FIG. 15, since there is no permanent magnet 15L in the stator yoke 12CL, the projecting portions 9 and 8L and the projecting portions 16L ₁ and 16L facing the magnetic flux of the permanent magnet 7L of the rotor portion 2 are provided. ₂ and enters the stator yoke 12CL side. Thereby, the magnetic path M15 is formed and the magnetic flux around the winding portion 17L becomes strong.

Similarly, in the generator 1C, since there is no permanent magnet 15U in the stator yoke 12CU, the magnetic flux of the permanent magnet 7U of the rotor part 2 enters the stator yoke 12CU side to form the magnetic path M16, but the protrusion on the stator part 3C side Since the portions 16U ₁ and 16U ₂ do not face the protruding portions 8U and 9 of the rotor portion 2, the magnetic flux around the winding portion 17U becomes weak.

  Thus, it can be seen that in the generator 1C, the strength of the magnetic flux in the winding portions 17U and 17L is reversed. Therefore, in the generator 1C, the phase of the current is inverted in the winding portions 17U and 17L. In addition, such a phase difference can be absorbed by using the power generation system described above.

  Also, the hollow portion 5 may be left hollow without a wire (the winding portions 18U and 18L are not provided), or a non-magnetic material may be packed in the hollow portions 5 on both sides of the permanent magnet 7C. . According to this, the generator 1 generates power only by the winding portions 17U and 17L. However, since the generator 1 has no cogging and has two winding portions 17U and 17L. As compared with a conventional generator having cogging and having a single winding portion, it is possible to generate power more efficiently.

  The permanent magnet 7C may be omitted, the rotor-side permanent magnets 7U and 7L and the stator-side permanent magnets 15U and 15L may be provided, and the former magnetic force may be made stronger than the latter. When the former magnetic force is x and the latter magnetic force is y, y <x ≦ 5y is preferable, and 2y ≦ x ≦ 4y is more preferable. These values are preferably the same when the permanent magnet 7C is provided.

1, 1A, 1B, 1C ... generator, 2 ... rotor part, 3 ... stator part, 4 ... rotor yoke (rotor member), 5 ... hollow part (non-magnetic body part), 6U, 6L, 14U, 14L ... groove, 7C ... permanent magnet (nonmagnetic portion permanent magnets), 7U, 7L ... permanent magnet (rotor side permanent magnets), 15U, 15L ... permanent magnet (stator side permanent _{magnets), 8U, 9,8L, 8U 1} , 8U 2 , 8L ₁ , 8L ₂ ... projecting part (rotor side projecting part), 11 ... hole (insertion hole of rotor part), 12U, 12L ... stator yoke (part of stator member), 13U, 13L ... hollow part, 16U ₁ , 16U ₂ , 16L ₁ , 16L ₂ , 16U, 16M, 16L ... Projection (stator side projection), 17U, 17L ... Winding part (stator side coil), 18U, 18L ... Winding part (rotor side coil)

Claims (9)

A rotor yoke made of a soft magnetic material and having a cylindrical non-magnetic material portion and a groove that is a multiple of 2 toward the non-magnetic material portion, and a ring shape that is arranged in each of the grooves and is NS magnetized in the axial direction The rotor-side permanent magnets and a plurality of rotor-side projecting portions that protrude toward the stator portion from the rotor-side permanent magnet and are arranged in a straight line at a constant pitch across the rotor-side permanent magnet And a rotor part having a ring-shaped non-magnetic body part permanent magnet provided in the non-magnetic body part and NS magnetized in the radial direction provided between the axial directions of the rotor-side permanent magnets,
It is made of a soft magnetic material, and protrudes toward the stator yoke, the rotor portion side, and is arranged in a straight line at a constant pitch at positions spaced apart from each other. A stator member that is wound in a direction, and a stator member that is configured such that the stator-side protrusions are shifted from each other by a half pitch between the stator members adjacent in the axial direction;
Having
A generator characterized by that. The generator according to claim 1,
A rotor-side coil wound in a circumferential direction in a space where the non-magnetic body part permanent magnet in the non-magnetic body part does not exist;
A ring-shaped stator side permanent magnet which is opposite to the rotor side permanent magnet and is magnetized in the opposite direction to the rotor side permanent magnet in the axial direction;
Have
The magnetic force of the rotor-side permanent magnet is stronger than the magnetic force of the stator-side permanent magnet,
A generator characterized by that. A rotor yoke made of a soft magnetic material and having a cylindrical non-magnetic material portion and a groove that is a multiple of 2 toward the non-magnetic material portion, and a ring shape that is arranged in each of the grooves and is NS magnetized in the axial direction The rotor-side permanent magnets and a plurality of rotor-side projecting portions that protrude toward the stator portion from the rotor-side permanent magnet and are arranged in a straight line at a constant pitch across the rotor-side permanent magnet And a rotor portion having
It is made of a soft magnetic material, and protrudes toward the stator yoke, the rotor portion side, and is arranged in a straight line at a constant pitch at positions spaced apart from each other. A stator member that is wound in a direction, and a stator member that is configured such that the stator-side protrusions are shifted from each other by a half pitch between the stator members adjacent in the axial direction;
Have
Furthermore, it has a ring-shaped stator side permanent magnet that is opposite to the rotor side permanent magnet and is magnetized in the opposite direction to the rotor side permanent magnet in the axial direction,
The magnetic force of the rotor-side permanent magnet is stronger than the magnetic force of the stator-side permanent magnet,
A generator characterized by that. The generator according to any one of claims 1 to 3,
The nonmagnetic body portions are installed in the number of the multiples, and each nonmagnetic body portion extends in the axial direction so as to connect two adjacent rotor side permanent magnets, and the length of the nonmagnetic body portions is the length of the rotor side permanent magnets. A generator characterized by a distance greater than or equal to the distance between both outer ends in the axial direction. A rotor yoke made of a soft magnetic material and having a cylindrical non-magnetic material portion and a groove that is a multiple of 2 toward the non-magnetic material portion, and a ring shape that is arranged in each of the grooves and is NS magnetized in the axial direction The rotor-side permanent magnets, and a plurality of rotor-side projecting portions that protrude to the stator portion side relative to the rotor-side permanent magnet and are disposed at positions separated from each other across the rotor-side permanent magnet. The rotor-side projecting portion disposed between the side permanent magnets is provided in the rotor-side projecting portion that is shifted by a half pitch from each other at a position that bisects the axial length thereof, and the non-magnetic body portion. There is no ring-shaped non-magnetic body permanent magnet in the radial direction provided between the rotor-side permanent magnet arrangement positions, and the non-magnetic body permanent magnet in the non-magnetic body portion. Winding in space circumferentially A rotor portion having a rotor side coil, a being,
A stator-like permanent magnet made of a soft magnetic material, opposite to the rotor-side permanent magnet and magnetized in the opposite direction to the rotor-side permanent magnet in the axial direction, and the stator-side permanent magnet Projecting toward the rotor portion side, facing the rotor portion of the stator side permanent magnet, and a stator side projection portion arranged at a fixed pitch with a straight line at positions spaced apart from each other with the stator side permanent magnet interposed therebetween. A stator member comprising a stator side coil wound in the circumferential direction on the opposite side to the side, and the stator side protrusions are arranged in a straight line at a constant pitch between the stator members adjacent in the axial direction. A stator part adapted to,
Having
A generator characterized by that. The generator according to claim 5, wherein
The magnetic force of the rotor-side permanent magnet is stronger than the magnetic force of the stator-side permanent magnet,
A generator characterized by that. The generator according to any one of claims 1 to 6,
The area of the portion where the rotor-side protruding portion and the stator-side protruding portion face each other and the area of the non-facing portion are constant regardless of the positional relationship in the rotational direction between the rotor portion and the stator portion. Set,
A generator characterized by that. A generator according to any one of claims 1 to 7,
A first converter for inputting the generated power of the stator side coil of the generator;
A second converter for inputting the generated power of a rotor side coil provided on the rotor side of the generator;
An inverter that inputs the output of the first converter and the output of the second converter in parallel and outputs AC power;
Having
A power generation system characterized by that. A generator according to any one of claims 1 to 7,
Connection means of a first device connected to the stator side coil of the generator;
Connection means of a second device connected to a rotor side coil provided on the rotor side of the generator;
Having
A power generation system characterized by that.

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