JP7215917B2 - Rotating electric machine - Google Patents

Description

The present invention relates to a brushless wound-field rotating electric machine.

As prior art, US Pat. Disclosed is a brushless wound-field rotating electric machine that eliminates the need for conventional brushes.

Patent Literature 2 discloses a structure in which a rotating electrical machine that functions as an electric motor when the engine is started and functions as a generator during running is arranged on the outer periphery of a power transmission device by connecting the engine and the rotating electrical machine.

By combining Patent Document 1 and Patent Document 2, three members, a stator, a rotor, and a field coil, are arranged coaxially with different diameters of a rotating shaft in a narrow space on the outer peripheral side of a power transmission device. It will be. Therefore, severe restrictions are imposed on the volume of the rotating electric machine, the degree of design freedom is restricted, and the output performance of the rotating electric machine is limited.

In the rotor of a rotary electric machine, the first magnetic pole and the second magnetic pole are positioned in a simple configuration while maintaining a non-contact state, thereby increasing the degree of freedom in design and improving the output performance. An electric machine is desired.

Patent No. 3445492 Japanese Patent Publication No. 2010-516558

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a brushless wound-field rotating electric machine in which the first magnetic pole and the second magnetic pole are positioned in a simple configuration while maintaining a non-contact state.

In order to solve the above problems, a rotating electric machine according to one aspect of the present invention includes:
a stator provided with a stator winding that generates a rotating magnetic field by alternating current;
a rotor held rotatably around a rotation axis with respect to the stator;
A field coil that excites the rotor with a direct current,
The rotor is
a first magnetic pole having a first annular portion and a plurality of claw portions extending from the first annular portion in the axial direction of the rotating shaft;
a second magnetic pole having a second annular portion and a plurality of protrusions projecting radially from the outer peripheral surface of the second annular portion;
In the rotor,
The claw portions of the first magnetic pole and the convex portions of the second magnetic pole are alternately positioned in the circumferential direction,
The first magnetic pole and the second magnetic pole are kept in a non-contact state by providing a radial gap, a circumferential gap and an axial gap between the first magnetic pole and the second magnetic pole,
The rotor further comprises a non-magnetic gap arrangement member arranged in the radial gap or the circumferential gap,
The gap providing member is axially engaged with at least one of the first magnetic pole and the second magnetic pole to axially position the first magnetic pole and the second magnetic pole. It is characterized by having a positioning part.

According to the present invention, the radial or circumferential positioning of the first magnetic pole and the second magnetic pole is performed by the non-magnetic gap providing member provided in the radial gap or the circumferential gap, and the gap is provided. Axial positioning is provided by the axial positioning portion of the member. Therefore, by providing a plurality of functions of the gap arrangement member, the first magnetic pole and the second magnetic pole can be simply and easily positioned while maintaining a non-contact state in the radial or circumferential direction and the axial direction. can be achieved.

It is a figure explaining schematic structure of a rotary electric machine. 1 is a perspective view of a rotor of a rotary electric machine according to a first embodiment of the present invention, cut vertically along a rotation axis; FIG. FIG. 3 is a cross-sectional view of the rotor shown in FIG. 2 cut vertically along the rotation axis; FIG. 3 is a plan view of the rotor shown in FIG. 2; FIG. 3 is a view of the rotor shown in FIG. 2 when viewed from the axial direction; FIG. 3 is a perspective view of the rotor shown in FIG. 2 with magnetic pole holding members removed; It is a figure when a magnetic pole holding member is seen from an axial direction. It is a perspective view of an intervening member. FIG. 7 is a perspective view of the rotor of the rotary electric machine according to the modified example of the first embodiment, cut vertically along the rotation axis; FIG. 11 is a perspective view of a rotor of a rotary electric machine according to another modified example of the first embodiment, cut vertically along the rotation axis; FIG. 7 is a perspective view of a rotary electric machine according to a second embodiment of the present invention, cut vertically along the rotating shaft; FIG. 2 is a perspective view of a rotor of a rotating electric machine cut vertically along the rotation axis; FIG. 13 is a plan view of the rotor shown in FIG. 12; 13 is a perspective view of the rotor shown in FIG. 12 with the magnetic pole holding member removed; FIG. FIG. 15 is a perspective view of the rotor shown in FIG. 14 with a spacer member removed; FIG. 4 is a perspective view of a spacer member; FIG. 11 is a perspective view of a modified example of the second embodiment when cut vertically along the rotation axis of the rotor;

An embodiment of a rotating electric machine 1 according to the present invention will be described below with reference to the drawings.

First, the overall configuration of the rotary electric machine 1 will be described with reference to FIG.

As shown in FIG. 1 , the rotating electric machine 1 is arranged between an engine 8 and a transmission 9 of a vehicle along a rotating shaft 10 , and is arranged between a case 5 containing the power transmission device 4 and the power transmission device 4 . is a brushless wound-field rotating electric machine 1 located at . The rotating electric machine 1 includes at least a rotor 2 , a stator 3 and a field coil 7 . The power transmission device 4 is arranged on a power transmission path from the output shaft of the engine 8 to the transmission 9, and is, for example, a torque converter, a friction clutch, a fluid coupling, or the like.

The stator 3 is a cylindrical member that is non-rotatably fixed and held by the case 5 . The stator 3 includes, for example, a stator core formed by laminating electromagnetic steel sheets, a plurality of slots formed in the stator core, and a plurality of stator windings 14 mounted in the slots. The stator 3 has stator windings 14 therein and generates a rotating magnetic field by alternating current flowing through the stator windings 14 .

The rotor 2 is connected to a synchronous rotating member that rotates synchronously with the output shaft of the engine 8 , and the central axis of the output shaft of the engine 8 is used as the rotating shaft 10 . Therefore, the output shaft of the engine 8 and the rotating shaft 10 of the rotor 2 of the rotating electric machine 1 have the same central axis.

The rotor 2 is fixedly disposed on the outer shell (synchronous rotating member) of the power transmission device 4, the outer peripheral surface of the rotor 2 faces the inner peripheral surface of the stator 3, and the transmission of the rotor 2 The end surface on the side of 9 faces the end surface of the field coil 7 on the side of the engine 8 and is held so as to be rotatable with respect to the stator 3 and the field coil 7 about the rotating shaft 10 . The rotor 2 has first magnetic poles 21 and second magnetic poles 22, as will be described later.

The field coil 7 is shifted to the transmission 9 side with respect to the rotor 2 along the rotation axis 10 and arranged side by side along the rotation axis 10 with respect to the rotor 2, and is arranged on the transmission 9 side. It is fixedly held in the case 5 . The field coil 7 is provided inside the field core 6 (shown in FIG. 11), and excites magnetic flux with direct current. Note that the field coil 7 can also be shifted to the engine 8 side with respect to the rotor 2 along the rotating shaft 10 and arranged side by side with respect to the rotor 2 via the second air gap 12 .

A first air gap 11 is formed between the rotor 2 and the stator 3 , and magnetic flux is transferred between the rotor 2 and the stator 3 via the first air gap 11 . The first air gap 11 is a gap formed between the inner peripheral surface of the stator 3 and the outer peripheral surface of the rotor 2 and extends along the axial direction of the rotating shaft 10 .

A second air gap 12 is formed between the rotor 2 and the field core 6 to transfer magnetic flux between the rotor 2 and the field coil 7 via the second air gap 12 . The second air gap 12 is a gap formed between the axial end of the rotation shaft 10 of the rotor 2 on the transmission 9 side and the end of the field core 6 on the engine 8 side.

Thus, the field coils 7 are arranged side by side in the axial direction of the rotating shaft 10 with respect to the rotor 2 via the second air gap 12 . According to this configuration, since the field coil 7 is shifted in the axial direction with respect to the rotor 2, the magnetic flux of the field coil 7 can be increased by increasing the thickness of the field coil 7 in the radial direction. In addition, the degree of freedom in design can be increased.

In the rotating electrical machine 1 configured as described above, when the field coil 7 is energized, a magnetic flux is generated by the field coil 7 . The magnetic flux from the field coil 7 passes from the field core 6 to the second air gap 12, the first magnetic pole 21 of the rotor 2, the first air gap 11, the stator 3, the first air gap 11, It is configured to return to the field core 6 via the second magnetic pole 22 of the rotor 2 and the second air gap 12 . At this time, for example, when a direct current is applied to the field coil 7, a magnetic flux is generated by the field coil 7, and the first magnetic pole 21 and the second magnetic pole 22 are formed, for example, as N poles and S poles, respectively. magnetized to

A case will be described in which the rotary electric machine 1 functions as an electric motor (starter motor) when the engine 8 is started. Based on a command to start the engine 8 , an inverter (not shown) is driven to apply a three-phase alternating current to the stator 3 to magnetize the stator 3 and apply a direct current to the field coil 7 . When a direct current flows through the field coil 7, the first magnetic pole 21 and the second magnetic pole 22 of the rotor 2 are excited. As a result, the rotor 2 starts rotating with respect to the stator 3 and an electromotive force having an induced voltage is generated in the stator 3 .

After that, the induced voltage increases according to the rotation speed of the rotor 2, and when the rotation speed reaches the rotation speed of the first explosion lower than the idling rotation speed corresponding to the idling of the engine 8, and the start of the engine 8 is completed. , the drive of the inverter is stopped, and thereafter, the mode automatically shifts to the power generation mode, that is, the rotating electric machine 1 functions as a generator (alternator) so as to maintain a predetermined induced voltage (required voltage).

In this power generation mode, when the field coil 7 continues to be excited, the excitation current is adjusted so that the induced voltage is constant at a predetermined induced voltage. The exciting current is adjusted so that the magnetizing force of the rotor 2 is reduced as the rotational speed increases, and the induced voltage is kept constant. Further, when the field coil 7 is not excited, the inverter adjusts the advance angle of the three-phase alternating current so that the induced voltage is constant at a predetermined induced voltage. Furthermore, the above two methods may be combined for adjustment. By controlling in this way, when the rotor 2 rotates, the rotary electric machine 1 functions as a generator.

As a result, by connecting the engine 8 and the rotating electrical machine 1, the rotating electrical machine 1 can function as an electric motor (starter motor) when the engine is started, and can function as a generator (alternator) during running.

[First embodiment]
Next, the configuration of the rotor 2 of the rotary electric machine 1 according to the first embodiment will be described in detail with reference to FIGS. 2 to 8. FIG.

As shown in FIG. 2 , the rotor 2 is of a claw pole type and includes first magnetic poles 21 , second magnetic poles 22 and magnetic pole holding members 23 .

The first magnetic pole 21 has a first annular portion 21a and a plurality of claw portions 21b, and is made of a soft magnetic material such as iron. The claw portion 21b extends in the axial direction of the rotating shaft 10 from the first annular portion 21a. The claw portion 21b has, for example, a rectangular thin plate shape. The claw portions 21b are arranged at regular intervals in the circumferential direction, for example, at regular intervals, and all the claw portions 21b have the same axial length. The outer peripheral surface of each claw portion 21b extends on the same circumference as the outer peripheral surface of the first annular portion 21a. The claw portion 21b is configured to be in a non-contact state with the second magnetic pole 22 when the first magnetic pole 21 and the second magnetic pole 22 are combined, and have a radial gap 16 in the radial direction.

As shown in FIG. 6, each claw portion 21b extends to the edge of the first annular portion 21a on the side of the engine 8 to form a first tip engaging portion 21c. The first tip engaging portion 21c is a stepped portion formed by notching the outer peripheral edge of the claw portion 21b. The outer peripheral surface of each first end engaging portion 21c is positioned on the same circumference around the central axis of the rotating shaft 10. As shown in FIG.

The second magnetic pole 22 has a second annular portion 22a and a plurality of convex portions 22b, and is made of a soft magnetic material such as iron. The second annular portion 22a has a radial gap 16 with respect to the first annular portion 21a and the claw portion 21b, and is arranged so as to partially overlap the claw portion 21b when viewed in the radial direction. there is The convex portion 22b protrudes radially outward from the outer peripheral surface of the second annular portion 22a. The convex portion 22b is arranged with a circumferential gap 17 in the circumferential direction with respect to the claw portion 21b. The convex portion 22b has, for example, a rectangular plate shape. The protrusions 22b are also arranged at regular intervals in the circumferential direction, for example, at regular intervals, and all the protrusions 22b have the same height in the radial direction. The axial lengths of the convex portions 22b are all the same, and are shorter than the axial length of the claw portions 21b. Further, the outer peripheral surface of each convex portion 22b is located on the same outer periphery as the outer peripheral surface of each claw portion 21b with the central axis of the rotating shaft 10 as the center.

As shown in FIGS. 2, 3 and 6, the diameter of one side in the axial direction of the first annular portion 21a and the second annular portion 22a (for example, the opposite side of the magnetic pole holding member 23 or the side of the transmission 9) An engagement recess 38 is formed in the direction gap 16 . The engagement recess 38 is composed of a first engagement recess 38a and a second engagement recess 38b. The first engaging recess 38a is a recess formed by cutting out the radially inner side of the first annular portion 21a. The second engaging recess 38b is a recess formed by cutting out the radially outer side of the second annular portion 22a.

As shown in FIGS. 2, 3 and 6, a plurality of permanent magnets 27 are arranged at positions corresponding to the claw portions 21b of the first magnetic pole 21. As shown in FIG. Specifically, the permanent magnet 27 is located at the same circumferential position as the claw portion 21b of the first magnetic pole 21 and is formed between the inner peripheral surface of the claw portion 21b and the outer peripheral surface of the second annular portion 22a. is arranged in a radial gap 16 that With this arrangement, the magnetic flux generated by the permanent magnet 27 is formed between the claw portion 21b of the first magnetic pole 21 and the convex portion 22b of the second magnetic pole 22. As shown in FIG. The permanent magnet 27 has, for example, a rectangular plate shape.

The permanent magnet 27 is a magnet whose main material is neodymium or a magnet whose main material is ferrite. Specifically, as the permanent magnet 27, various types of permanent magnets such as SmCo magnets, AlNiCo magnets, or neodymium bond magnets can be used. The permanent magnets 27 can be arranged in all or part of the radial gap 16 at the pawl 21b.

According to this configuration, the output performance of the rotary electric machine 1 can be improved by using the magnetic flux from the permanent magnet 27 in addition to the magnetic flux from the field coil 7 . Further, by sandwiching and holding the permanent magnet 27 between the claw portion 21b and the second annular portion 22a, the strength of the permanent magnet 27 against the centrifugal force acting during rotation can be reinforced, and the permanent magnet 27 can be held by the centrifugal force. Deformation of the magnet 27 can be prevented, and centrifugal strength during high rotation can be improved.

In the assembled rotor 2, each claw portion 21b of the first magnetic pole 21 is arranged in the intermediate portion of the circumferential gap 17 between adjacent convex portions 22b. As a result, the claw portions 21b and the convex portions 22b are alternately positioned in the circumferential direction.

In the assembled rotor 2, as shown in FIGS. 2 and 6, a gap is formed between the first magnetic poles 21 and the second magnetic poles 22 to maintain a non-contact state. That is, there is a radial gap 16 in the radial direction between the first annular portion 21a and the second annular portion 22a, and a circumferential gap 17 in the circumferential direction between the claw portion 21b and the convex portion 22b. There is an axial gap 18 in the axial direction between the first annular portion 21a and the convex portion 22b. These gaps 16, 17, 18 allow the first magnetic pole 21 and the second magnetic pole 22 to be kept out of contact in the radial, circumferential and axial directions, respectively.

The rotor 2 further includes a magnetic pole holding member 23 for fixing while maintaining the non-contact state. As shown in FIG. 3, the magnetic pole holding member 23 is an annular member and has a base portion 23a, a locking portion 23b, an opening portion 26, and an overhang portion . The magnetic pole holding member 23 is made of a non-magnetic material such as aluminum or austenitic stainless steel. The locking portion 23b protrudes to one side in the axial direction (for example, the transmission 9 side) at the outer peripheral end portion of the base portion 23a, and is locked to the first tip locking portion 21c of the claw portion 21b. . With this locking structure, the claw portion 21b that is cantilevered with respect to the first annular portion 21a of the first magnetic pole 21 is held by the magnetic pole holding member 23 in the radial direction, so that it acts during rotation. Can resist centrifugal force.

An opening 26 is formed in the base 23 a of the magnetic pole holding member 23 . The opening 26 is an opening penetrating through the base 23a in the thickness direction. As shown in FIG. 2, the openings 26 are arranged at regular intervals in the circumferential direction, for example, at equal intervals, and have a pair of one opening 26a and the other opening 26b. One opening 26a and the other opening 26b are formed symmetrically in the circumferential direction with the protrusion 22b interposed therebetween. Apertures 26 are used to provide a snap-fit connection with engaging claws 34, which will be described later.

As shown in FIG. 7, one opening 26a has one introduction hole 26c and one engagement hole 26d. One introduction hole 26c is formed radially inward and has a circumferential length and a radial width larger than those of one engagement hole 26d. One engaging hole 26d is formed radially outward and is formed in the circumferential direction near the convex portion 22b. One introduction hole 26c is a hole for introducing one engaging claw portion 34a of the intervening member 30, which will be described later. One engaging hole 26d is a hole for receiving one leg portion 33a of an intervening member 30, which will be described later, and for engaging one engaging claw portion 34a with the engaged surface 23e.

Similarly, the other opening 26b has the other introduction hole 26e and the other engagement hole 26f. The other introduction hole 26e is formed radially inward and has a larger circumferential length and radial width than the other engaging hole 26f. The other engaging hole 26f is formed radially outward and is formed near the convex portion 22b in the circumferential direction. The other introduction hole 26e is a hole for introducing the other engaging claw portion 34b of the intervening member 30, which will be described later. The other engaging hole 26f is a hole for receiving the other leg portion 33b of the intervening member 30, which will be described later, and for engaging the other engaging claw portion 34b with the engaged surface 23e.

The magnetic pole holding member 23 has a plurality of protrusions 28 arranged in the circumferential gap 17 . The projecting portion 28 extends from the base portion 23a toward one side in the axial direction (for example, the transmission 9 side). The projecting portion 28 is configured in shape and size so as to fill the circumferential gap 17 .

By arranging the projecting portion 28 of the magnetic pole holding member 23 in the circumferential gap 17 so as to fill the circumferential gap 17, the phase shift in the circumferential direction between the first magnetic pole 21 and the second magnetic pole 22 is reduced. Since the torque is eliminated, torque is reliably transmitted between the first magnetic pole 21 and the second magnetic pole 22 .

As shown in FIGS. 2, 3 and 6, in the rotor 2, the intervening member 30 is arranged in the radial gap 16. As shown in FIG. The intervening member 30 functions as a gap providing member provided in the radial gap 16 and is made of a non-magnetic material such as aluminum, austenitic stainless steel, or resin material.

As shown in FIG. 8 , the interposed member 30 has an annular base portion 31 , an engaging projection portion 32 , a plurality of leg portions 33 and a plurality of engaging claw portions 34 . The annular base 31 has an annular shape. The engaging protrusion 32 is formed at one end in the axial direction of the annular base 31 (for example, the opposite side of the magnetic pole holding member 23 or the transmission 9 side) and protrudes radially. The engaging protrusion 32 includes a first engaging protrusion 32a protruding radially outward and a second engaging protrusion 32b protruding radially inward. The engagement protrusion 32 of the interposed member 30 is configured to engage with the engagement recess 38 of the radial gap 16 . That is, the first engagement protrusion 32a and the second engagement protrusion 32b are configured to engage with the first engagement recess 38a and the second engagement recess 38b, respectively.

The leg portion 33 extends from the annular base portion 31 toward the other axial side (for example, the magnetic pole holding member 23 side or the engine 8 side) in the radial gap 16 . The leg portions 33 are arranged at regular intervals, for example, at regular intervals in the circumferential direction, and are constituted by a pair of one leg portion 33a and the other leg portion 33b. Legs 33 are elastically deformable to provide a snap-fit connection.

The engaging claw portion 34 is a hook that is formed at the end portion of the leg portion 33 on the other axial side (for example, the side of the magnetic pole holding member 23 or the side of the engine 8) and protrudes toward the convex portion 22b side in the circumferential direction. have a shape. The engaging claw portion 34 includes one engaging claw portion 34a formed on one leg portion 33a and the other engaging claw portion 34b formed on the other leg portion 33b. One leg portion 33a and one engaging claw portion 34a, and the other leg portion 33b and the other engaging claw portion 34b are provided so as to be symmetrical in the circumferential direction with respect to the convex portion 22b. The engaging claw portion 34 of the interposed member 30 is configured to axially engage with the opening portion 26 of the magnetic pole holding member 23 . That is, the one engaging claw portion 34a and the other engaging claw portion 34b are axially engaged with the one engaging hole 26d and the other engaging hole 26f, respectively, and the engaged surface 23e. is configured as

On one axial side of the intervening member 30 (for example, the opposite side of the magnetic pole holding member 23 or the side of the transmission 9), the engaging protrusion 32 axially engages the engaging recess 38 of the radial gap 16. , the annular base portion 31 is sandwiched in the radial gap 16 between the first annular portion 21a and the second annular portion 22a. According to this configuration, axial positioning and fixing are performed by the engagement of the engaging projection 32 with the engaging recess 38 on one axial side of the interposed member 30. Acts as an axial locator.

Then, the one engaging claw portion 34a and the other engaging claw portion 34b are introduced into the one introduction hole 26c and the other introduction hole 26e, respectively. After that, by elastically deforming the one leg portion 33a and the other leg portion 33b radially outward, the one engaging claw portion 34a and the other engaging claw portion 34b are respectively engaged with one of the engaging claw portions 34a and 34b. It engages with the hole 26d and the other engaging hole 26f, and also engages with the engaged surface 23e. Therefore, the intervening member 30 is fixed to the magnetic pole holding member 23 by snap-fitting by fitting the engaging claw portion 34 into the engaging hole 26d on one side and the engaging hole 26f on the other side of the opening 26. . According to this configuration, axial positioning is performed by axial engagement on the other side of the axial direction of one engaging claw portion 34a and the other engaging claw portion 34b. The claw portion 34a and the other engaging claw portion 34b act as axial positioning portions. Axial positioning can be achieved simply and easily by the engaging protrusion 32 engaging with the engaging recess 38 and the engaging pawl 34 engaging with the engaged surface 23e. Further, the intervening member 30 can be easily and reliably fixed to the magnetic pole holding member 23 by the snap-fit connection.

In this manner, the intervening member 30 has the engaging protrusion 32 on one side in the axial direction and the engaging claw portion 34 on the other side in the axial direction, thereby positioning the first magnetic pole and the second magnetic pole in the axial direction. can be performed simply and easily.

The first magnetic pole 21 and the second magnetic pole 22 are radially held in a non-contact state via the annular base portion 31 of the intervening member 30 arranged in the radial gap 16 . Since the annular base portion 31 of the intervening member 30, the first annular portion 21a of the first magnetic pole 21, and the second annular portion 22a of the second magnetic pole 22 have the same central axis (that is, are coaxial), Radial positioning (so-called centering) of the first magnetic pole and the second magnetic pole can be performed simply and easily.

In the rotor 2 of the rotary electric machine 1 according to the present invention, the radial positioning (so-called centering) of the first magnetic poles 21 and the second magnetic poles 22 is simply and easily performed by the intervening member 30 disposed in the radial gap 16. In addition, axial positioning is performed by the axial positioning portion of the interposed member 30, that is, the engaging projection portion 32 and the engaging claw portion 34. As shown in FIG. Therefore, by providing multiple functions of the intervening member 30, it is possible to simply and easily achieve a structure in which the first magnetic pole 21 and the second magnetic pole 22 are positioned while maintaining a non-contact state in the radial and axial directions. .

[Modification of First Embodiment]
A modification of the rotating electric machine 1 according to the first embodiment will be described with reference to FIG. 9 . FIG. 9 is a perspective view when the rotor 2 of the rotating electric machine 1 according to the modification is vertically cut along the rotating shaft 10. As shown in FIG. In the modified example shown in FIG. 9, in comparison with the rotor 2 shown in FIG. 2, the engaging claw portion 34 of the intervening member 30 is engaged with the engaged surface 22e of the convex portion 22b.

As in the embodiment shown in FIG. 2, the intervening member 30 shown in FIG. 33a and the other leg portion 33b) and an engaging claw portion 34 (one engaging claw portion 34a and the other engaging claw portion 34b). The convex portion 22b has an engaged surface 22e on the other side in the axial direction (for example, the side facing the magnetic pole holding member 23 or the side of the engine 8).

An engaging protrusion 32 that protrudes in the radial direction is formed at one end of the annular base 31 in the axial direction (for example, the opposite side of the magnetic pole holding member 23 or the transmission 9 side). The engagement protrusion 32 is configured to axially engage with the engagement recess 38 of the radial gap 16 . The engaging projection 32 acts as an axial positioning part.

At the end of the leg portion 33 on the other axial side (for example, the side of the magnetic pole holding member 23 or the side of the engine 8), a hook-shaped engaging claw portion 34 ( One engaging claw portion 34a and the other engaging claw portion 34b) are formed. The leg portions 33 (one leg portion 33a and the other leg portion 33b) are elastically deformed in the circumferential direction toward the convex portion 22b, thereby engaging the engaging claw portions 34 (one engaging claw portion 34a and the other engaging claw portion 34a and the other leg portion 33b). The engaging claw portion 34b) is configured to axially engage with the engaged surface 22e of the convex portion 22b. The engaging claw portion 34 of the interposed member 30 is fixed to the convex portion 22b by snap-fit coupling. In this manner, one engaging claw portion 34a and the other engaging claw portion 34b function as axial positioning portions. Therefore, the axial positioning can be achieved simply and easily by the engaging projection 32 engaging with the engaging recess 38 and the engaging pawl 34 engaging with the engaged surface 22e.

In the rotor 2 of the rotary electric machine 1 according to this modification, the intervening member 30 disposed in the radial gap 16 facilitates radial positioning (so-called centering) of the first magnetic poles 21 and the second magnetic poles 22. This can be easily performed, and the axial positioning is performed by the axial positioning portion of the interposed member 30, that is, the engaging projection portion 32 and the engaging claw portion 34. As shown in FIG. Therefore, by providing multiple functions of the intervening member 30, it is possible to simply and easily achieve a structure in which the first magnetic pole 21 and the second magnetic pole 22 are positioned while maintaining a non-contact state in the radial and axial directions. .

In the rotor 2 of the rotary electric machine 1 according to the modification, the permanent magnets 27 are axially locked by the magnet locking portions 22d of the second magnetic poles 22. As shown in FIG. That is, the magnet locking portion 22d protrudes radially outward at the end portion of the second annular portion 22a of the second magnetic pole 22 on the other axial side (for example, the magnetic pole holding member 23 side or the engine 8 side). ing. The radial gap 16 at the end on the other side in the axial direction is narrowed in the radial direction by the magnet locking portion 22d. Thereby, the permanent magnet 27 arranged in the radial gap 16 can be fixed in the axial direction.

[Another modification of the first embodiment]
Another modification of the rotating electrical machine 1 according to the first embodiment will be described with reference to FIG. 10 . FIG. 10 is a perspective view of the rotor 2 of the rotary electric machine 1 according to another modification, cut vertically along the rotating shaft 10. As shown in FIG. 10, in comparison with the rotor 2 shown in FIG. or engine 8 side), it engages with both the claw portion 21b of the first magnetic pole 21 and the permanent magnet 27 . The engaging claw portion 34 of the intervening member 30 does not necessarily need to engage both the claw portion 21b of the first magnetic pole 21 and the permanent magnet 27, and may engage only the permanent magnet 27, for example.

The intervening member 30 shown in FIG. 10 is disposed in the radial gap 16 and engages with the annular base portion 31, the engaging projection portion 32, and the leg portion 33 (one leg portion 33a and the other leg portion 33b). Claw portions 34 (one engaging claw portion 34a and the other engaging claw portion 34b) are provided. It has a hook shape extending to the side.

The claw portion 21b has an engaged surface 21e on the other side in the axial direction. The permanent magnet 27 also has an engaged surface 27e on the other side in the axial direction. When the permanent magnet 27 is arranged in the radial gap 16, the engaged surface 21e and the engaged surface 27e are configured to be flush with each other.

The leg portions 33 (one leg portion 33a and the other leg portion 33b) are elastically deformed in the circumferential direction toward the opposite side of the convex portion 22b, thereby forming the engaging claw portion 34 (one engaging claw portion 34a). and the other engaging claw portion 34b) engage both the engaged surface 21e of the claw portion 21b and the engaged surface 27e of the permanent magnet 27 in the axial direction. As a result, the intervening member 30 is fixed to the claw portion 21b and the permanent magnet 27 by snap-fit coupling. Since the engaging pawl portion 34 functions as an axial positioning portion, the engaging projection portion 32 engaging with the engaging recess portion 38 and the engaging pawl portion 34 engaging with both the pawl portion 21b and the permanent magnet 27, Axial positioning can be achieved simply and easily. The permanent magnet 27 arranged in the radial gap 16 can be fixed in the axial direction by the engaging claw portion 34 .

[Second embodiment]
Next, the configuration of the rotor 2 of the rotary electric machine 1 according to the second embodiment will be described in detail with reference to FIGS. 11 to 16. FIG.

As shown in FIGS. 11 and 12 , the rotor 2 is of a claw pole type and includes first magnetic poles 21 , second magnetic poles 22 and magnetic pole holding members 23 .

The first magnetic pole 21 has a first annular portion 21a and a plurality of claw portions 21b, and is made of a soft magnetic material such as iron. The claw portion 21b extends in the axial direction of the rotating shaft 10 from the first annular portion 21a. The claw portion 21b has, for example, a rectangular thin plate shape. The claw portions 21b are arranged at regular intervals, for example, at equal intervals in the circumferential direction, and all the claw portions 21b have the same axial length. The outer peripheral surface of each claw portion 21b extends on the same circumference as the outer peripheral surface of the first annular portion 21a. The claw portion 21b is configured to be in a non-contact state with the second magnetic pole 22 when the first magnetic pole 21 and the second magnetic pole 22 are combined, and have a radial gap 16 in the radial direction.

Each claw portion 21b extends to the edge of the first annular portion 21a on the side of the engine 8 to form a first tip locking portion 21c. The first tip engaging portion 21c is a stepped portion formed by notching the outer peripheral edge of the claw portion 21b. The outer peripheral surface of each first end engaging portion 21c is positioned on the same circumference around the axis of the rotating shaft 10. As shown in FIG.

The second magnetic pole 22 has a second annular portion 22a and a plurality of convex portions 22b, and is made of a soft magnetic material such as iron. The second annular portion 22a is arranged so as to partially overlap the claw portion 21b when viewed from the radial direction, with a radial gap 16 provided inside the claw portion 21b. The convex portion 22b protrudes radially from the outer peripheral surface of the second annular portion 22a. The convex portion 22b is arranged with a circumferential gap 17 in the circumferential direction with respect to the claw portion 21b. The convex portion 22b has, for example, a rectangular plate shape. The protrusions 22b are also arranged at regular intervals, for example, at regular intervals in the circumferential direction, and the heights in the radial direction of the protrusions 22b are all the same. The axial lengths of the convex portions 22b are all the same, and are shorter than the axial length of the claw portions 21b.

The outer peripheral surface of each convex portion 22b is located on the same outer periphery with respect to the outer peripheral surface of each claw portion 21b with the axis of the rotating shaft 10 as the center. Each convex portion 22b extends to the edge of the second annular portion 22a on the side of the engine 8 to form a second tip locking portion 122c. The second tip engaging portion 122c is a stepped portion formed by notching the outer peripheral edge of the convex portion 22b. The outer peripheral surface of each second end engaging portion 122c is positioned on the same circumference as the outer peripheral surface of each first end engaging portion 21c with the axis of the rotating shaft 10 as the center. Therefore, the outer peripheral surface of each first tip locking portion 21c and the outer peripheral surface of each second tip locking portion 122c are positioned on the same circumference around the axis of the rotating shaft 10. As shown in FIG. According to this configuration, the outer peripheral surface of the first tip locking portion 21c and the outer peripheral surface of each of the second tip locking portions 122c are positioned on the same outer periphery, so that the first tip locking portion 21c and each of the second tips Fitting between the engaging portion 122c and the fitting portion 123a of the magnetic pole holding member 23, which will be described later, is easy.

An engaging convex portion 121d is provided on the surface of each claw portion 21b facing the convex portion 22b. The engaging convex portion 121d protrudes in the circumferential direction toward the convex portion 22b. The engaging projection 121d has a rectangular shape in a plan view as shown in FIG. 13, and has a rectangular shape in the axial direction as shown in FIG. The outer peripheral surface of the engaging convex portion 121d is positioned on the same circumference as the outer peripheral surface of the first end locking portion 21c of the claw portion 21b. The engaging convex portion 121d of the claw portion 21b engages with the axial engaging portion 132 of the spacer member 130. As shown in FIG.

As shown in FIGS. 11, 12, 14 and 15, a plurality of permanent magnets 27 are arranged at positions corresponding to the claw portions 21b of the first magnetic pole 21. As shown in FIGS. Specifically, the permanent magnet 27 is located at the same position in the circumferential direction as the claw portion 21b of the first magnetic pole 21, and is positioned radially between the inner peripheral surface of the claw portion 21b and the outer peripheral surface of the second annular portion 22a. It is arranged in the gap 16 . With this arrangement, the magnetic flux generated by the permanent magnet 27 is formed between the claw portion 21b of the first magnetic pole 21 and the convex portion 22b of the second magnetic pole 22. As shown in FIG. The permanent magnet 27 has, for example, a rectangular plate shape.

The permanent magnet 27 is a magnet whose main material is neodymium or a magnet whose main material is ferrite. Specifically, as the permanent magnet 27, various types of permanent magnets such as SmCo magnets, AlNiCo magnets, or neodymium bond magnets can be used. The permanent magnets 27 can be arranged in all or part of the radial gap 16 at the pawl 21b.

According to this configuration, the output performance of the rotary electric machine 1 can be improved by using the magnetic flux from the permanent magnet 27 in addition to the magnetic flux from the field coil 7 . Further, by sandwiching and holding the permanent magnet 27 between the claw portion 21b and the second annular portion 22a, the strength of the permanent magnet 27 against the centrifugal force can be reinforced, and deformation of the permanent magnet 27 due to the centrifugal force can be prevented. It is possible to improve the centrifugal strength at high rotation.

The rotor 2 is assembled as follows. By axially moving the first magnetic pole 21 relative to the second magnetic pole 22, each claw portion 21b of the first magnetic pole 21 is inserted into the intermediate portion of the circumferential gap 17 between the adjacent convex portions 22b. As a result, the claw portions 21b and the convex portions 22b are assembled while being alternately arranged in the circumferential direction. In the assembled state, the outer peripheral surface of each first end locking portion 21c and the outer peripheral surface of each second end locking portion 122c are configured to be positioned on the same circumference around the axis of the rotating shaft 10. It is

In the assembled state, as shown in FIG. 14, a gap is formed between the first magnetic pole 21 and the second magnetic pole 22 to maintain a non-contact state. That is, there is a radial gap 16 in the radial direction between the claw portion 21b and the second annular portion 22a, a circumferential gap 17 in the circumferential direction between the claw portion 21b and the convex portion 22b, and a There is an axial clearance 18 in the axial direction between the annular portion 21a and the convex portion 22b. Therefore, the first magnetic pole 21 and the second magnetic pole 22 are kept out of contact in the radial, circumferential and axial directions.

The rotor 2 further includes a magnetic pole holding member 23 for fixing while maintaining the non-contact state. As shown in FIG. 13, the magnetic pole holding member 23 is an annular member and has a fitting portion 123a at the end on the outer peripheral side. The magnetic pole holding member 23 is made of a non-magnetic material such as aluminum or austenitic stainless steel. The fitting portion 123a protrudes toward the transmission 9, for example, and connects the first end locking portion 21c of the claw portion 21b of the first magnetic pole 21 and the second end locking portion of the protrusion 22b of the second magnetic pole 22. 122c. Due to the fitting structure, the first magnetic pole 21 and the second magnetic pole 22 are fixedly held in the radial direction by the magnetic pole holding member 23 . The magnetic pole holding member 23 also has a through hole (not shown) for bolting with a bolt 138 to be described later.

As shown in FIGS. 13, 14 and 16, the rotor 2 further includes a spacer member 130 for filling the circumferential gap 17. As shown in FIG.

As shown in FIG. 16, the spacer member 130 consists of a pair of rectangular parallelepiped members, one spacer member 130a and the other spacer member 130b. One spacer member 130a and the other spacer member 130b are configured to be circumferentially symmetrical. Hereinafter, the one spacer member 130a and the other spacer member 130b are collectively referred to simply as the spacer member 130. As shown in FIG.

The spacer member 130 has an axially extending screw hole 131 and an axial engaging portion 132 . The spacer member 130 functions as a gap providing member provided in the circumferential gap 17 and is made of a non-magnetic material such as aluminum or austenitic stainless steel. The axial engagement portion 132 is provided on the side of the first magnetic pole 21 facing the claw portion 21b. The axial engaging portion 132 has an engaging end portion 133 and an engaging recess portion 134, and is formed by partially notching a corner portion facing both the claw portion 21b and the magnetic pole holding member 23. .

The engaging end portion 133 and the engaging concave portion 134 are arranged in the axial direction. It engages axially with portion 121d. The engaging concave portion 134 is, for example, a concave portion located on the engine 8 side and receives the engaging convex portion 121d of the claw portion 21b.

As shown in FIGS. 13 and 14 , the spacer member 130 is arranged between the claw portion 21 b of the first magnetic pole 21 and the convex portion 22 b of the second magnetic pole 22 so as to fill the circumferential gap 17 . At this time, the surface of the spacer member 130 facing the protrusion 22b abuts against the protrusion 22b, and the surface of the engaging end 133 of the spacer member 130 facing the claw 21b contacts the claw 21b. , the circumferential gap 17 is substantially filled by the spacer member 130 . Further, the engaging concave portion 134 of the spacer member 130 receives the engaging convex portion 121d of the claw portion 21b, and the engaging end portion 133 of the claw portion 21b faces the side of the claw portion 21b that does not face the magnetic pole holding member 23. 9 side surface), the axial engaging portion 132 axially engages with the engaging convex portion 121d.

In the rotor 2 of the rotary electric machine 1 according to the present invention, the spacer member 130 is arranged between the claw portion 21b of the first magnetic pole 21 and the convex portion 22b of the second magnetic pole 22 so as to fill the circumferential gap 17. In this state, the magnetic pole holding member 23 is engaged with the magnetic pole holding member 23 so that the magnetic pole holding member 23 is fixed in the radial direction. That is, the magnetic pole holding member 23 is axially attached to the first magnetic pole 21 and the second magnetic pole 22 in which the spacer member 130 is arranged between the claw portion 21b and the convex portion 22b. At this time, the fitting portion 123a of the magnetic pole holding member 23 is connected to the first end engaging portion 21c of the claw portion 21b of the first magnetic pole 21 and the second end engaging portion 122c of the convex portion 22b of the second magnetic pole 22. fit against.

By screwing the threaded portion of the bolt 138 into the screw hole 131 of the spacer member 130 , the spacer member 130 is fixed (that is, bolted) to the magnetic pole holding member 23 with the bolt 138 . The bolting allows the spacer member 130 to be easily and reliably fixed to the magnetic pole holding member 23 . When the spacer member 130 is bolted to the magnetic pole holding member 23, the engaging end portion 133 of the spacer member 130 is pulled toward the magnetic pole holding member 23 and axially engaged with the engaging convex portion 121d of the claw portion 21b. As a result, the first magnetic pole 21 is axially held and fixed by the magnetic pole holding member 23 . Also, the second magnetic pole 22 can be fixed to the magnetic pole holding member 23 by any fixing method described later.

The spacer member 130 is arranged between the claw portion 21b of the first magnetic pole 21 and the convex portion 22b of the second magnetic pole 22 so as to fill the circumferential gap 17, so that the first magnetic pole 21 and the second magnetic pole 22 is retained in the circumferential direction. As a result, the phase shift in the circumferential direction between the first magnetic pole 21 and the second magnetic pole 22 is eliminated, so torque is reliably transmitted between the first magnetic pole 21 and the second magnetic pole 22 .

According to the above configuration, the magnetic pole holding member 23 holds the first magnetic pole 21 and the second magnetic pole 22 in the radial direction. 22, and the spacer member 130 axially engages the claw portion 21b of the first magnetic pole 21, thereby axially holding the first magnetic pole 21. be. Therefore, the spacer member 130 provides a plurality of functions, so that the first magnetic pole 21 and the second magnetic pole 22 are fixed to the magnetic pole holding member 23 while maintaining a non-contact state in the radial direction, the circumferential direction, and the axial direction. structure can be easily achieved.

A modification of the second embodiment will be described with reference to FIG. FIG. 17 is a perspective view of the rotor 2 cut vertically along the rotation axis 10 according to the modification of the second embodiment. In the modification shown in FIG. 17, a bolt 138 is provided for fixing the second magnetic pole 22 to the magnetic pole holding member 23 in comparison with the rotary electric machine 1 shown in FIG.

A screw hole (not shown) is formed in the second magnetic pole 22 , and a through hole corresponding to the screw hole is formed in the magnetic pole holding member 23 . The screw holes of the second magnetic pole 22 are formed, for example, in the second annular portions 22a radially inside the convex portions 22b as shown in FIG. 17, but are not limited to this position.

By screwing the screw portion of the bolt 138 into the screw hole of the second magnetic pole 22 , the second magnetic pole 22 is fixed (that is, bolted) to the magnetic pole holding member 23 with the bolt 138 . The bolting allows the second magnetic pole 22 to be easily and reliably fixed to the magnetic pole holding member 23 . Therefore, the first magnetic pole 21 and the second magnetic pole 22 can be easily and reliably fixed to the magnetic pole holding member 23 .

Although specific embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention.

In the first embodiment, the permanent magnets 27 are arranged in the radial gaps 16 corresponding to the claw portions 21b. You can leave it as is.

In the above-described first embodiment, as a method of fixing the intervening member 30 to the magnetic pole holding member 23 and the convex portion 22b, fixing by snap-fit coupling was exemplified. Alternatively, brazing or riveting of the engaging claw portion 34 to the opening 26 can be used. With this fixing method, the first magnetic pole 21 and the second magnetic pole 22 can be easily and reliably fixed to the magnetic pole holding member 23 .

In the second embodiment, the permanent magnet 27 is arranged in the radial gap 16 at the claw portion 21b of the first magnetic pole 21, but the permanent magnet 27 is not arranged in the radial gap 16 at the claw portion 21b. , the radial gap 16 can also be left hollow.

In the above-described second embodiment, as a method of fixing the first magnetic pole 21 and the second magnetic pole 22 to the magnetic pole holding member 23, bolting with the bolts 138 was exemplified, but welding, riveting or brazing can also be used. With this fixing method, the first magnetic pole 21 and the second magnetic pole 22 can be easily and reliably fixed to the magnetic pole holding member 23 .

In FIG. 1 showing the schematic configuration of the rotating electric machine 1, the position of the stator 3 and the position of the field coil 7 are exchanged so that the field coil 7 is arranged radially outside the rotor 2, and the stator 3 rotates. It can also be configured to be shifted in the axial direction with respect to the child 2 . In this case, a first air gap 11 is formed between the rotor 2 and the stator 3, while a second air gap 12 is formed between the rotor 2 and the field coil 7. .

In the above embodiment, the rotor 2 is fixed to the outer shell (synchronous rotating member) of the power transmission device 4. However, for example, when the power transmission device 4 is a torque converter, the outer shell of the power transmission device 4 (Synchronous rotating member) is a drive plate connected to the front cover of the torque converter and the engine 8 side. Synchronous rotating members having similar functions are, for example, a clutch cover of a friction clutch, a flywheel connected to the engine 8 side of the friction clutch, an outer shell of a fluid coupling, and a fluid coupling connected to the engine 8 side. drive plates, etc.

In the above embodiment, as an example, the rotating electric machine 1 is arranged between the engine 8 and the transmission 9 along the rotating shaft 10 . However, the rotating electric machine 1 may be replaced with an alternator, connected to the output shaft of the engine 8, arranged between the engine 8 and the transmission 9, or arranged between the transmission 9 and the drive shaft. , or can be attached to the drive shaft itself.

The rotary electric machine 1 of the present invention is not limited to vehicles, and can be used for a wide range of common generators and electric motors.

The present invention and embodiments are summarized as follows.

A rotary electric machine 1 according to one aspect of the present invention includes:
a stator 3 having a stator winding 14 that generates a rotating magnetic field by alternating current;
a rotor 2 held rotatably around a rotating shaft 10 with respect to the stator 3;
A field coil 7 that excites the rotor 2 with a direct current,
The rotor 2 is
a first magnetic pole 21 having a first annular portion 21a and a plurality of claw portions 21b extending from the first annular portion 21a in the axial direction of the rotating shaft 10;
A second magnetic pole 22 having a second annular portion 22a and a plurality of convex portions 22b projecting radially from the outer peripheral surface of the second annular portion 22a,
In the rotor 2,
The claw portions 21b of the first magnetic pole 21 and the convex portions 22b of the second magnetic pole 22 are alternately positioned in the circumferential direction,
By providing a radial gap 16, a circumferential gap 17 and an axial gap 18 between the first magnetic pole 21 and the second magnetic pole 22, the first magnetic pole 21 and the second magnetic pole 22 are kept in a non-contact state. is kept at
The rotor 2 further includes a non-magnetic gap arrangement member 30; 130 arranged in the radial gap 16 or the circumferential gap 17,
The gap arrangement member 30; 130 is axially engaged with at least one of the first magnetic pole 21 and the second magnetic pole 22 to separate the first magnetic pole 21 and the second magnetic pole 22. 132 for axial positioning.

According to the above configuration, the first magnetic pole 21 and the second magnetic pole 22 can be radially or circumferentially positioned by the non-magnetic gap arrangement members 30 and 130 arranged in the radial gap 16 or the circumferential gap 17. 132 of the gap arrangement member 30; Therefore, the structure in which the first magnetic pole 21 and the second magnetic pole 22 are positioned while maintaining a non-contact state in the radial or circumferential direction and the axial direction by providing a plurality of functions of the gap arrangement member 30; can be achieved simply and easily.

Further, in the rotating electric machine 1 of one embodiment,
The gap arrangement member 30 is arranged in the radial gap 16 and positions the first magnetic pole 21 and the second magnetic pole 22 in the radial direction.

According to the above embodiment, the first magnetic pole 21 and the second magnetic pole 22 are positioned while maintaining a non-contact state in the radial direction and the axial direction by providing the gap arrangement member 30 with a plurality of functions. can be achieved simply and easily.

Further, in the rotating electric machine 1 of one embodiment,
The rotor 2 further includes a nonmagnetic magnetic pole holding member 23 that holds the claw portions 21b of the first magnetic poles 21 in the radial direction.

According to the above-described embodiment, the claw portion 21b of the first magnetic pole 21 is held by the magnetic pole holding member 23 in the radial direction, so that the centrifugal force acting during rotation can be resisted.

Further, in the rotating electric machine 1 of one embodiment,
The magnetic pole holding member 23 has a projecting portion 28 arranged in the circumferential gap 17 .

According to the above-described embodiment, the protruding portion 28 eliminates the phase shift in the circumferential direction between the first magnetic pole 21 and the second magnetic pole 22. Torque is reliably transmitted.

Further, in the rotating electric machine 1 of one embodiment,
The rotor 2 has an engaging recess 38 on one side in the axial direction and an engaged surface 22e on the other side in the axial direction,
The gap providing member 30 has an engaging protrusion 32 that engages with the engaging recess 38 on one side in the axial direction, and an engaging pawl portion 34 that engages with the engaged surface 22e on the other side in the axial direction. has
The engaging protrusion 32 and the engaging pawl 34 serve as the axial positioning portion.

According to the above-described embodiment, the engaging projections 32 that engage with the engaging recesses 38 and the engaging claws 34 that engage with the engaged surface 22e of the rotor 2 facilitate axial positioning. easily achievable.

Further, in the rotating electric machine 1 of one embodiment,
The rotor 2 has an engaging recess 38 on one side in the axial direction, and the magnetic pole holding member 23 has an engaged surface 23e on the other side in the axial direction,
The gap providing member 30 has an engaging protrusion 32 that engages with the engaging recess 38 on one side in the axial direction, and an engaging pawl portion 34 that engages with the engaged surface 23e on the other side in the axial direction. has
The engaging protrusion 32 and the engaging pawl 34 serve as the axial positioning portion.

According to the above-described embodiment, the engaging protrusion 32 engaged with the engaging recess 38 and the engaging pawl 34 engaging with the engaged surface 23e of the magnetic pole holding member 23 facilitate positioning in the axial direction. and easily achieved.

Further, in the rotating electric machine 1 of one embodiment,
The field coils 7 are arranged side by side in the axial direction of the rotating shaft 10 with respect to the rotor 2 .

According to the above-described embodiment, the radial thickness of the field coil 7 can be increased to increase the magnetic flux of the field coil 7, and the degree of freedom in design can be increased.

Further, in the rotating electric machine 1 of one embodiment,
A permanent magnet is placed in the radial gap 16 between the inner circumferential surface of the claw portion 21b and the outer circumferential surface of the second annular portion 22a, which is at the same position in the circumferential direction as the claw portion 21b of the first magnetic pole 21 and the outer circumferential surface of the second annular portion 22a. 27.

According to the above embodiment, the output performance of the rotary electric machine 1 can be improved by using the magnetic flux from the permanent magnets 27 in addition to the magnetic flux from the field coil 7 .

Further, in the rotating electric machine 1 of one embodiment,
The gap arrangement member 130 is arranged in the circumferential gap 17 and positions the first magnetic pole 21 and the second magnetic pole 22 in the circumferential direction.

According to the above embodiment, the gap arrangement member 130 provides a plurality of functions so that the first magnetic pole 21 and the second magnetic pole 22 are positioned while maintaining a non-contact state in the circumferential direction and the axial direction. can be achieved simply and easily.

Further, in the rotating electric machine 1 of one embodiment,
The rotor 2 further includes non-magnetic magnetic pole holding members 23 that hold the first magnetic poles 21 and the second magnetic poles 22 in the radial direction.

According to the above-described embodiment, the first magnetic pole 21 and the second magnetic pole 22 are radially held by the magnetic pole holding member 23, so that the centrifugal force acting during rotation can be resisted.

Further, in the rotating electric machine 1 of one embodiment,
The gap arrangement member 130 is fixed to the magnetic pole holding member 23 in a state in which the axial positioning portion 132 is engaged with the claw portion 21b.

According to the above embodiment, the first magnetic pole 21 and the second magnetic pole 22 are fixed while maintaining a non-contact state in the radial direction, the circumferential direction, and the axial direction.

Further, in the rotating electric machine 1 of one embodiment,
The claw portion 21b has an engaging convex portion 121d that protrudes in the circumferential direction on the side facing the convex portion 22b,
The gap arrangement member 130 has an axial engaging portion 132 that engages the engaging convex portion 121d in the axial direction on the side not facing the magnetic pole holding member 23,
The axial engaging portion 132 of the gap providing member 130 engages the engaging convex portion 121d of the claw portion 21b.

According to the above embodiment, the axial engaging portion 132 of the gap providing member 130 engages with the engaging convex portion 121d of the pawl portion 21b, so that axial engagement can be easily achieved.

Further, in the rotating electric machine 1 of one embodiment,
The claw portion 21b of the first magnetic pole 21 has a first tip locking portion 21c at the edge on the magnetic pole holding member 23 side,
The convex portion 22b of the second magnetic pole 22 has a second tip locking portion 122c at the edge on the magnetic pole holding member 23 side,
The magnetic pole holding member 23 has a fitting portion 123a fitted to the first tip locking portion 21c and the second tip locking portion 122c on the outer peripheral side.

According to the above-described embodiment, the first magnetic pole 21 and the second magnetic pole 22 are radially fixedly held by the magnetic pole holding member 23 .

Further, in the rotating electric machine 1 of one embodiment,
The outer peripheral surface of the first tip locking portion 21c and the outer peripheral surface of the second tip locking portion 122c are positioned on the same circumference around the axis of the rotating shaft 10. As shown in FIG.

According to the above embodiment, the fitting between the first tip engaging portion 21c and each of the second tip engaging portions 122c and the fitting portion 123a of the magnetic pole holding member 23 is easy.

Further, in the rotating electric machine 1 of one embodiment,
The fixing of the gap arrangement member 130 to the magnetic pole holding member 23 is bolting, welding, riveting or brazing.

According to the above embodiment, the gap arrangement member 130 can be easily and reliably fixed to the magnetic pole holding member 23 .

Further, in the rotating electric machine 1 of one embodiment,
The field coils 7 are arranged side by side in the axial direction of the rotating shaft 10 with respect to the rotor 2 .

According to the above-described embodiment, the radial thickness of the field coil 7 can be increased to increase the magnetic flux of the field coil 7, and the degree of freedom in design can be increased.

Further, in the rotating electric machine 1 of one embodiment,
A permanent magnet is placed in the radial gap 16 between the inner circumferential surface of the claw portion 21b and the outer circumferential surface of the second annular portion 22a, which is at the same position in the circumferential direction as the claw portion 21b of the first magnetic pole 21 and the outer circumferential surface of the second annular portion 22a. 27.

According to the above embodiment, the output performance of the rotary electric machine 1 can be improved by using the magnetic flux from the permanent magnets 27 in addition to the magnetic flux from the field coil 7 .

1... Rotating electric machine (brushless winding field type rotating electric machine)
DESCRIPTION OF SYMBOLS 2... Rotor 3... Stator 4... Power transmission device 5... Case 6... Field core 7... Field coil 8... Engine 9... Transmission 10... Rotary shaft 11... First air gap 12... Second air gap 14 ... Stator winding 16 ... Radial clearance 17 ... Circumferential clearance 18 ... Axial clearance 21 ... First magnetic pole 21a ... First annular portion 21b ... Claw portion 21c ... First tip locking portion 121d ... Engagement convex portion 21e Engaged surface 22 Second magnetic pole 22a Second annular portion 22b Convex portion 122c Second tip engaging portion 22d Magnet engaging portion 22e Engaged surface 23 Magnetic pole holding member 23a Base 123a... Fitting portion 23b... Locking portion 23e... Engaged surface 26... Opening 26a... One opening 26b... The other opening 26c... One introduction hole 26d... One engagement hole 26e... The other introduction Hole 26f... The other engagement hole 27... Permanent magnet 27e... Engaged surface 28... Overhang 30... Interposed member (gap arrangement member)
31... Annular base 32... Engagement protrusion (axial positioning part)
32a... First engagement protrusion 32b... Second engagement protrusion 33... Leg 33a... One leg 33b... The other leg 34... Engagement pawl (axial positioning part)
34a... One engaging claw portion (axial positioning portion)
34b... The other engaging claw portion (axial positioning portion)
38 Engagement recess 38a First engagement recess 38b Second engagement recess 130 Spacer member (gap arrangement member)
130a...One spacer member 130b...The other spacer member 131...Screw hole 132...Axial engaging portion (axial positioning portion)
133... Engagement end 134... Engagement recess 138... Bolt

Claims (17)

a stator provided with a stator winding that generates a rotating magnetic field by alternating current;
a rotor held rotatably around a rotation axis with respect to the stator;
A field coil that excites the rotor with a direct current,
The rotor is
a first magnetic pole having a first annular portion and a plurality of claw portions extending in the axial direction of the rotating shaft and connected to the first annular portion;
a second magnetic pole having a second annular portion and a plurality of protrusions that are continuous with the second annular portion and protrude radially from the outer peripheral surface of the second annular portion;
In the rotor,
wherein the claw portion of the first magnetic pole is located radially outside the second annular portion of the second magnetic pole,
The claw portions of the first magnetic pole and the convex portions of the second magnetic pole are alternately positioned in the circumferential direction,
wherein the convex portion of the second magnetic pole is surrounded by the claw portion of the first magnetic pole, the claw portion, and the first annular portion,
The first magnetic pole and the second magnetic pole are kept in a non-contact state by providing a radial gap, a circumferential gap and an axial gap between the first magnetic pole and the second magnetic pole,
The rotor further comprises a non-magnetic gap arrangement member arranged in the radial gap or the circumferential gap,
The gap providing member is axially engaged with at least one of the first magnetic pole and the second magnetic pole to axially position the first magnetic pole and the second magnetic pole. A brushless wound-field rotating electric machine having a positioning portion. 2. The electric rotating machine according to claim 1, wherein said gap arrangement member is arranged in said radial gap and performs radial positioning of said first magnetic pole and said second magnetic pole. 3. The electric rotating machine according to claim 1, wherein said rotor further comprises a non-magnetic magnetic pole holding member that holds said claw portions of said first magnetic poles in a radial direction. 4. The rotating electric machine according to claim 3, wherein said magnetic pole holding member includes an overhang portion arranged in said circumferential gap. The rotor has an engaging recess on one side in the axial direction and a surface to be engaged on the other side in the axial direction,
The gap providing member has an engaging projection that engages with the engaging recess on one side in the axial direction and an engaging claw that engages with the engaged surface on the other side in the axial direction,
The rotating electric machine according to any one of claims 1 to 4, wherein the engaging protrusion and the engaging claw serve as the axial positioning portion. The rotor has an engaging recess on one side in the axial direction, and the magnetic pole holding member has a surface to be engaged on the other side in the axial direction,
The gap providing member has an engaging projection that engages with the engaging recess on one side in the axial direction and an engaging claw that engages with the engaged surface on the other side in the axial direction,
5. The rotating electric machine according to claim 3, wherein said engaging protrusion and said engaging claw serve as said axial positioning portion. The rotating electric machine according to any one of claims 1 to 6, wherein the field coils are arranged side by side with respect to the rotor in the axial direction of the rotating shaft. A permanent magnet is further provided in the radial gap between the inner circumferential surface of the claw portion and the outer circumferential surface of the second annular portion at the same position in the circumferential direction as the claw portion of the first magnetic pole. The rotary electric machine according to any one of claims 1 to 7. 2. The electric rotating machine according to claim 1, wherein said gap arrangement member is arranged in said circumferential gap and performs circumferential positioning of said first magnetic pole and said second magnetic pole. 10. The rotating electric machine according to claim 9, wherein said rotor further comprises a non-magnetic magnetic pole holding member that radially holds said first magnetic pole and said second magnetic pole. 11. The electric rotating machine according to claim 10, wherein said gap providing member is fixed to said magnetic pole holding member in a state in which said axial positioning portion is engaged with said pawl portion. the claw portion has an engaging convex portion that protrudes in the circumferential direction on the side facing the convex portion;
The gap providing member has an axial engaging portion that engages the engaging convex portion in the axial direction on a side that does not face the magnetic pole holding member,
12. The electric rotating machine according to claim 10, wherein said axial engaging portion of said gap providing member engages said engaging convex portion of said claw portion. the claw portion of the first magnetic pole has a first tip locking portion at the edge on the side of the magnetic pole holding member;
the convex portion of the second magnetic pole has a second tip locking portion at the edge on the side of the magnetic pole holding member;
13. The rotation according to any one of claims 10 to 12, wherein the magnetic pole holding member has a fitting portion that fits into the first tip locking portion and the second tip locking portion on an outer peripheral side. electric machine. 14. The electric rotating machine according to claim 13, wherein an outer peripheral surface of said first end engaging portion and an outer peripheral surface of said second end engaging portion are positioned on the same circumference around the axis of said rotating shaft. 15. The electric rotating machine according to claim 10, wherein said gap arrangement member is fixed to said magnetic pole holding member by bolting, welding, riveting or brazing. The rotating electric machine according to any one of claims 9 to 15, wherein the field coils are arranged side by side in the axial direction of the rotating shaft with respect to the rotor. A permanent magnet is further provided in the radial gap between the inner circumferential surface of the claw portion and the outer circumferential surface of the second annular portion at the same position in the circumferential direction as the claw portion of the first magnetic pole. The rotary electric machine according to any one of claims 9 to 16.

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