JP5039482B2 - Rotor laminated core for reluctance motor - Google Patents

Description

    The present invention relates to a rotor laminated iron core for a reluctance motor, and more specifically, a plurality of arc-shaped slits convex on the rotation shaft hole side are formed concentrically, and a plurality of arc-shaped slits are formed around the rotation shaft hole. The present invention relates to a detailed structure of a rotor laminated iron core for a reluctance motor, which is formed by laminating iron core pieces formed at intervals.

    For example, as drive motors installed in various machine tools, automobiles, etc., replacement of conventional brushed motors with brushless motors is progressing due to demands for improved durability and higher output. As an aspect, in a stator laminated iron core that generates a traveling wave magnetic field by multiphase AC, a rotor laminated iron core having a salient pole type magnetic path rotates in synchronization with the traveling wave magnetic field, that is, a reluctance motor (particularly, Synchronous reluctance motors) have been provided (see, for example, Patent Document 1).

  As shown in FIG. 18, a rotor laminated core (rotor laminated core for reluctance motor) A in a reluctance motor is formed by laminating a predetermined number of core pieces P, P... And integrating these core pieces P, P. A rotation shaft hole O is opened at the center, and arc-shaped slits S, S... As flux barriers (magnetic flux barriers) are formed around the rotation shaft hole O.

  Here, in the rotor laminated iron core A, a magnetic path in the magnetic salient pole direction and a magnetic path in the non-salient pole direction are formed, so that each iron core piece P, P. A plurality of arc-shaped slits S, S... That are convex are formed concentrically, and the group of arc-shaped slits S, S... Formed concentrically is spaced around the rotation shaft hole O. A plurality of sets are formed.

  Thereby, along the extending direction of the arc-shaped slits S, S..., A magnetic path in the salient pole direction (dd axis) where the magnetic flux easily flows is formed, and the arc-shaped slits S, S. A magnetic path in the non-salient pole direction (qq axis) in which magnetic flux hardly flows is formed along the direction, and the rotor laminated core A is based on the difference in inductance between the salient pole direction and the non-salient pole direction. It will rotate by the reluctance torque which arises.

  Here, in the rotor laminated core A described above, since the edges of the core pieces P formed with the arc-shaped slits S, S... Are connected, there is a problem that efficiency of the reluctance motor is reduced due to leakage of magnetic flux. It was.

  Therefore, a rotor laminated core configured to improve the efficiency of the reluctance motor by forming an arc-shaped slit at the peripheral edge of the core piece and preventing leakage of magnetic flux is provided (for example, Patent Documents). 2).

That is, in the rotor laminated core A ′ shown in FIG. 19, the arcuate shape is opened around the rotation shaft hole O ′ in the laminated core pieces P ′, P ′. The slits S ′, S ′,... Are formed, and the arc-shaped slits S ′, S ′,... Are filled with resin (connectors) I ′, I ′, which are nonmagnetic materials, so that they are integrally fixed. The rotor laminated iron core A ′ is constructed.
JP 2001-258222 A JP 2000-299947 A

    By the way, in the above-described conventional rotor laminated core A ′, the leakage of magnetic flux can be prevented, so that the efficiency of the reluctance motor can be improved. On the other hand, the edge of the core piece P ′ in which the arc-shaped slit S ′ is formed is provided. As a result of the division, the magnetic flux path portion between the arc-shaped slits S ′ and S ′ is separated, and it is difficult to manufacture the rotor laminated core A ′.

  Alternatively, there is a method in which the edge of the core piece P ′ formed with the arc-shaped slits S ′, S ′,... Is connected until the final stage of the manufacture of the rotor laminated core A ′ in order to eliminate the inconvenience. In addition, since it is necessary to remove the connecting portion of the core piece P ′ by grinding or cutting in the final finishing process, there is an inconvenience that it is difficult to manufacture the rotor laminated core A ′.

  In view of the actual situation described above, the present invention can achieve further improvement in motor efficiency (motor characteristics) without accompanying the complexity of the manufacturing process seen in conventional rotor laminated cores, The object is to provide a rotor laminated core for a reluctance motor.

    In order to achieve the above object, a rotor laminated iron core for a reluctance motor according to the invention of claim 1 is formed concentrically with a plurality of arc-shaped slits convex on the rotating shaft hole side, and a plurality of arc-shaped slits are formed. Stacked iron core pieces formed at intervals around the rotation shaft hole, and a magnetic flux along the salient pole direction in which the magnetic flux easily flows along the extending direction of the arc-shaped slit and the parallel direction of the arc-shaped slit. In the rotor core for a reluctance motor that rotates due to the reluctance torque generated based on the difference in inductance from the non-salient direction in which the magnetic flux is difficult to flow, the easy magnetization axis direction is along the extending direction of the arc-shaped slit. And the directionality electromagnetic steel plate was inserted and installed in the aspect which leaves a clearance gap in an arc-shaped slit, It is characterized by the above-mentioned.

  The rotor laminated core for a reluctance motor according to the invention of claim 2 is the non-inserted gap of the rotor laminated iron core for a reluctance motor according to the invention of claim 1 in the gap where the grain-oriented electrical steel sheet is not inserted in the arc-shaped slit. It is characterized by being filled with a connecting body made of a magnetic material.

  The rotor laminated iron core for a reluctance motor according to the invention of claim 3 is formed by concentrically forming a plurality of arc-shaped slits convex on the rotating shaft hole side, and spacing the plurality of arc-shaped slits around the rotating shaft holes. The salient pole direction, in which the magnetic flux is easy to flow along the extending direction of the arc-shaped slit, and the non-salient pole direction, in which the magnetic flux is difficult to flow along the parallel direction of the arc-shaped slit, In the rotor laminated core for a reluctance motor that rotates due to the reluctance torque generated based on the difference in inductance with the magnet, a rib extending in the radial direction of the core piece is formed in the arc-shaped slit, and an easy magnetization axis is formed in the arc-shaped slit. It is characterized in that a directionally oriented electromagnetic steel sheet is inserted and installed in such a manner that the direction is along the extending direction of the arc-shaped slit and the gap is left in the arc-shaped slit. .

  The rotor laminated core for a reluctance motor according to the invention of claim 4 is the non-inserted gap in the rotor-laminated iron core for a reluctance motor according to the invention of claim 3 in the gap where the grain-oriented electrical steel sheet is not inserted in the arc-shaped slit. It is characterized by being filled with a connecting body made of a magnetic material.

  The rotor laminated iron core for a reluctance motor according to the invention of claim 5 is formed by concentrically forming a plurality of arc-shaped slits projecting from the rotation shaft hole side, and spacing the plurality of arc-shaped slits around the rotation shaft hole. The salient pole direction, in which the magnetic flux is easy to flow along the extending direction of the arc-shaped slit, and the non-salient pole direction, in which the magnetic flux is difficult to flow along the parallel direction of the arc-shaped slit, In the laminated core of the rotor for reluctance motor that rotates by the reluctance torque generated based on the difference in inductance with each other, the arc-shaped slits adjacent to each other in a plurality of concentric arc-shaped slits are alternately magnetized in the direction of the easy axis Is characterized in that the directional electromagnetic steel sheet is inserted and installed in a manner that extends along the extending direction of the arc-shaped slit.

  A rotor laminated iron core for a reluctance motor according to the invention of claim 6 is a directional electrical steel sheet of the plurality of arc-shaped slits concentrically formed in the rotor laminated iron core for a reluctance motor according to the invention of claim 5. An arc-shaped slit having no insertion is filled with a connecting body made of a non-magnetic material.

In the rotor laminated iron core for a reluctance motor according to the first aspect of the present invention, the direction of the salient pole is obtained by inserting the directional electromagnetic steel sheet into the arc-shaped slit with the easy axis of magnetization aligned with the extending direction of the arc-shaped slit. The magnetic flux is more likely to flow to the (dd axis) and the directional electromagnetic steel sheet is inserted into the arc slit in such a manner that the gap portion remains in the arc slit, so that the salient pole direction (dd Since the difference in inductance between the axis) and the non-salient pole direction (qq axis) increases, the motor efficiency (motor characteristics) in the reluctance motor is improved.
Moreover, in the rotor laminated iron core for a reluctance motor according to the invention of claim 1, the directional electromagnetic steel sheet is inserted into the arc-shaped slit, thereby removing the connecting portion at the periphery of the iron core piece where the arc-shaped slit is formed. It is possible to achieve further improvement in motor efficiency (motor characteristics) without complicating the process seen in the manufacture of a conventional rotor laminated core.

  In the rotor laminated core for a reluctance motor according to the invention of claim 2, a gap made of a non-magnetic material is filled in the gap where the directional electromagnetic steel sheet is not inserted in the arc-shaped slit. Combined with the effect of the rotor laminated iron for reluctance motors related to the invention, the rotor laminated iron core is firmly integrated through a connecting material, so that the rotor laminated iron core has a centrifugal resistance to high-speed rotation over a long period of time. Excellent in properties.

In the rotor laminated core for a reluctance motor according to the invention of claim 3, a rib extending in the radial direction of the core piece is formed in the arc-shaped slit, and the easy magnetization axis direction is set along the extending direction of the arc-shaped slit. By inserting the directional electrical steel sheet into the arc-shaped slit, the magnetic flux is more likely to flow in the salient pole direction (dd axis), and the gap is left in the arc-shaped slit. Since the magnetic steel sheet is inserted into the arc-shaped slit, the difference in inductance between the salient pole direction (dd axis) and the non-salient pole direction (qq axis) increases, so that the motor efficiency in the reluctance motor (motor Characteristics) will be improved.
In the rotor laminated core for a reluctance motor according to the invention of claim 3, the directional electromagnetic steel sheet inserted into the arc-shaped slit can be positioned and supported even in the rib formed on the iron core piece. Strength stability will be improved.
Furthermore, in the rotor laminated iron core for a reluctance motor according to the invention of claim 3, by inserting the directional electromagnetic steel sheet into the arc-shaped slit, it is said that the connecting portion at the periphery of the iron core piece formed with the arc-shaped slit is removed. It is possible to achieve further improvement in motor efficiency (motor characteristics) without complicating the process seen in the manufacture of a conventional rotor laminated core.

  In the rotor laminated core for a reluctance motor according to the invention of claim 4, a gap made of a non-magnetic material is filled in the gap where the directional electromagnetic steel sheet is not inserted in the arc-shaped slit. Combined with the effect of the rotor laminated iron for reluctance motors related to the invention, the rotor laminated iron core is firmly integrated through a connecting material, so that the rotor laminated iron core has a centrifugal resistance to high-speed rotation over a long period of time. Excellent in properties.

In the rotor laminated iron core for a reluctance motor according to the invention of claim 5, the grain-oriented electrical steel sheet is inserted alternately with the arc-shaped slits adjacent to each other so that the easy magnetization axis direction is along the extending direction of the arc-shaped slit. Thus, the magnetic flux more easily flows in the salient pole direction (dd axis), and a gap is formed by the adjacent alternating arc-shaped slits. Since the inductance difference from the salient pole direction (qq axis) increases, the motor efficiency (motor characteristics) in the reluctance motor is improved.
Moreover, in the rotor laminated iron core for a reluctance motor according to the invention of claim 5, by inserting a directional electromagnetic steel sheet into the arc-shaped slit, it is said that the connecting portion of the peripheral edge of the iron core formed with the arc-shaped slit is removed. It is possible to achieve further improvement in motor efficiency (motor characteristics) without complicating the process seen in the manufacture of a conventional rotor laminated core.

  In the rotor laminated core for a reluctance motor according to the invention of claim 6, among the plurality of arc-shaped slits, the arc-shaped slit into which the directional electromagnetic steel sheet is not inserted is filled with the coupling body made of a nonmagnetic material. In addition to the effect of the rotor laminated iron for a reluctance motor according to the invention of claim 5, the rotor laminated iron core is firmly integrated through a connecting material, so that the rotor laminated iron core is high speed over a long period of time. Excellent centrifugal resistance against rotation.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
1 to 3 show a first embodiment of a rotor laminated core for a reluctance motor according to the present invention, and this rotor laminated core (rotor laminated core for a reluctance motor) 10 has a predetermined number of core pieces. Are formed by laminating 11, 11... And integrating these iron core pieces 11, 11...

  Further, in the rotor laminated core 10, the rotating shaft hole 11 o side is projected on each of the core pieces 11, 11... In order to form a magnetic path in the magnetic salient pole direction and a magnetic path in the non-salient pole direction. Are formed concentrically, and a group of these concentric arc-shaped slits 11S, 11S... Is spaced around the rotation shaft hole 11o. A plurality of groups, four groups in the embodiment, are formed.

  With the above configuration, a magnetic path in the salient pole direction (dd axis) in which the magnetic flux easily flows is formed along the extending direction of the arc-shaped slits 11S, 11S, and the arc-shaped slits 11S, 11S,. A magnetic path in the non-salient pole direction (qq axis) in which the magnetic flux hardly flows is formed along the direction, and thus the rotor laminated core 10 is based on the difference in inductance between the salient pole direction and the non-salient pole direction. Rotation occurs due to reluctance torque generated.

  Further, directional electromagnetic steel sheets 12, 12... Are inserted and installed in the respective arc-shaped slits 11S, 11S... In the rotor laminated core 10, and these directional electromagnetic steel sheets 12, 12. The slits 11S, 11S are curved along the extending direction.

  As shown in FIG. 2 (a), positioning notches 11Sn and 11Sn are notched at both ends of each arc-shaped slit 11S, 11S... As shown in FIG. 2 (b), the edge portion is fitted into the positioning notches 11Sn and 11Sn, thereby leaving the gap portion 11Ss along the arc-shaped slit 11S and over the entire length of the arc-shaped slit 11S. It is installed in the mode to make it.

  Further, as shown in FIG. 3, the grain-oriented electrical steel sheet 12 has the rolling direction, that is, the easy axis direction indicated by arrows ee, the extension direction of the arc-shaped slits 11S, 11S. .. Are inserted and installed in each of the arc-shaped slits 11S, 11S... Of the rotor laminated core 10 in a manner along the salient pole direction (dd axis).

  According to the rotor laminated core 10 having the above-described configuration, the directional magnetic steel sheet 12 is inserted into the arc-shaped slit 11S with the easy axis of magnetization aligned with the extending direction of the arc-shaped slit 11S. The magnetic flux is more likely to flow to the (dd axis), and the directional electromagnetic steel sheet 12 is inserted into the arc-shaped slit 11S in such a manner that the gap 11Ss remains in the arc-shaped slit 11S. The difference in inductance between the pole direction (dd axis) and the non-salient pole direction (qq axis) is increased, thereby improving the motor efficiency (motor characteristics) of the reluctance motor.

  Moreover, according to the rotor laminated core 10 of the structure mentioned above, it says that the connection part of the core piece periphery in which the arc-shaped slit was formed will be removed by inserting the directional electromagnetic steel plate 12 in the arc-shaped slit 11S. Thus, it is possible to achieve further improvement in motor efficiency (motor characteristics) without complicating the process seen in the manufacture of the rotor laminated iron core.

  4 and 5 show a second embodiment of a rotor laminated core for a reluctance motor according to the present invention, and this rotor laminated core (rotor laminated core for a reluctance motor) 10 'has a predetermined number of cores. .. Are formed by laminating the pieces 11, 11..., And a rotation shaft hole 10O ′ is opened at the center.

  Further, the rotor laminated core 10 ′ includes gap portions 11Ss of the arc-shaped slits 11S, 11S... In the rotor laminated core 10 of the first embodiment (FIGS. 1 to 3) shown in FIG. As shown in FIG. 5 (b), 11Ss... Is filled with, for example, connecting bodies 13 made of a nonmagnetic material such as a resin material.

  In other words, the rotor laminated core 10 ′ is different from the rotor laminated core 10 of the first embodiment (FIGS. 1 to 3) except that the gaps 11Ss, 11Ss,. There is no.

  According to the rotor laminated core 10 ′ having the above-described configuration, the gap 11 </ b> Ss in which the directional electromagnetic steel sheet 12 is not inserted in the arc-shaped slit 11 </ b> S is filled with the coupling body 13 made of a nonmagnetic material. Combined with the same effect as the rotor laminated iron 10 of the embodiment, the rotor laminated iron core 10 ′ is firmly integrated through the connecting member 13, so that the rotor laminated iron core 10 ′ can be used for a long time. Excellent centrifugal resistance against high-speed rotation.

  FIGS. 6 and 7 show a third embodiment of a rotor laminated core for a reluctance motor according to the present invention. This rotor laminated core (rotor laminated core for a reluctance motor) 20 has a predetermined number of core pieces. Are formed by laminating 21, 21... And integrating these iron core pieces 21, 21..., And a rotation shaft hole 20 O is opened at the center.

  In addition, a plurality of arc-shaped slits 21S, 21S... Projecting from the rotating shaft hole 21o are formed concentrically on each of the core pieces 21, 21. Four groups of slits 21S, 21S... Are formed around the rotation shaft hole 21o at intervals.

  At the center of each arcuate slit 21S, 21S ..., ribs 21L, 21L ... that divide each arcuate slit 21S into two are formed extending in the radial direction of the iron core piece 21, and ... Are inserted and installed in the arc-shaped slits 21S, 21S,..., Which are curved along the extending direction of the arc-shaped slit 21S.

  As shown in FIG. 7 (a), positioning notches 21Sn, 21Sn,... Are notched at both ends of each arcuate slit 21S, 21S, and both edges of each rib 21L, 21L, The orientation-oriented electrical steel sheet 22 that is curved as described above is configured such that its easy magnetization axis direction extends along the extending direction of the arc-shaped slit 21S, and as shown in FIG. , 21Sn so that the gap 21Ss is left along the arcuate slit 21S.

  According to the rotor laminated core 20 having the above-described configuration, the rib 21L extending in the radial direction of the core piece 21 is formed in the arc-shaped slit 21S, and the easy axis of magnetization is aligned with the extending direction of the arc-shaped slit 21S. Accordingly, by inserting the grain-oriented electrical steel sheet 22 into the arc-shaped slit 21S, the magnetic flux more easily flows in the salient pole direction (dd axis), and in conjunction with this, the gap portion 21Ss is formed in the arc-shaped slit 21S. The difference in inductance between the salient pole direction (dd axis) and the non-salient pole direction (qq axis) is increased by inserting the grain-oriented electrical steel sheet 22 into the arc-shaped slit 21S in such a manner as to remain. Thus, the motor efficiency (motor characteristics) in the reluctance motor is improved.

  Moreover, according to the rotor laminated core 20 of the structure mentioned above, since the directional electromagnetic steel plate 22 inserted in the arc-shaped slit 21S can be positioned and supported also in the rib 21L formed in the iron core piece 21, the rotor laminated iron core. The stability of strength at 20 will be improved.

  Furthermore, according to the rotor laminated iron core 20 having the above-described configuration, by inserting the directional electromagnetic steel plate 22 into the arc-shaped slit 21S, it is said that the connecting portion on the peripheral edge of the iron core piece formed with the arc-shaped slit is removed. Thus, it is possible to achieve further improvement in motor efficiency (motor characteristics) without complicating the process seen in the manufacture of the rotor laminated iron core.

  FIGS. 8 and 9 show a fourth embodiment of a rotor laminated core for a reluctance motor according to the present invention, and this rotor laminated core (rotor laminated core for a reluctance motor) 20 ′ has a predetermined number of cores. Are formed by laminating pieces 21, 21... And integrating these iron pieces 21, 21..., And a rotation shaft hole 20 O ′ is opened at the center.

  Further, the rotor laminated core 20 ′ includes gap portions 21 Ss of arc-shaped slits 21 S, 21 S... In the rotor laminated core 20 of the third embodiment (FIGS. 6 and 7) shown in FIG. As shown in FIG. 9 (b), 21Ss... Are filled with connecting members 23, 23... Made of a nonmagnetic material such as a resin material.

  In other words, the rotor laminated core 20 ′ is different from the rotor laminated core 20 of the third embodiment (FIGS. 6 and 7) except that the gaps 21Ss, 21Ss,. There is no.

  According to the rotor laminated core 20 ′ having the above-described configuration, the gap portion 21 </ b> Ss in which the directional electromagnetic steel plate 22 is not inserted in the arc-shaped slit 21 </ b> S is filled with the coupling body 23 made of a nonmagnetic material, Combined with the same effect as the rotor laminated iron 20 of the embodiment, the rotor laminated iron core 20 ′ is firmly integrated through the connecting member 23, so that the rotor laminated iron core 20 ′ can be used over a long period of time. Excellent centrifugal resistance against high-speed rotation.

  FIGS. 10 and 11 show a fifth embodiment of a rotor laminated core for a reluctance motor according to the present invention, and this rotor laminated core (rotor laminated core for a reluctance motor) 30 has a predetermined number of core pieces. Are formed by laminating 31, 31... And integrating these iron core pieces 31, 31...

  Further, each of the core pieces 31, 31... Constituting the rotor laminated core 30 is formed concentrically with a plurality of arc-shaped slits 31S, 31S. Four groups of slits 31S, 31S... Are formed around the rotation shaft hole 31o at intervals.

  Ribs 31L, 31L extending in the radial direction of the core piece 31 are formed at the center of each of the arc-shaped slits 31S, 31S... .. Are inserted and installed in the arc-shaped slits 31S, 31S,..., Which are curved along the extending direction of the arc-shaped slit 31S.

  As shown in FIG. 11 (a), positioning notches 31Sn, 31Sn,... Are cut out at both ends of each arc-shaped slit 31S, 31S,... Is an aspect in which the direction of easy axis of magnetization is along the extending direction of the arc-shaped slit 31S, and the edge is fitted to the positioning notches 31Sn and 31Sn as shown in FIG. Along the arc-shaped slit 31S, the gap 31Ss is left behind.

  According to the rotor laminated core 30 having the above-described configuration, the rib 31L extending in the radial direction of the iron core piece 31 is formed in the arc-shaped slit 31S, and the easy axis direction is aligned with the extending direction of the arc-shaped slit 31S. Accordingly, by inserting the directional electromagnetic steel sheet 32 into the arc-shaped slit 31S, the magnetic flux is more likely to flow in the salient pole direction (dd axis), and accordingly, the gap portion 31Ss is formed in the arc-shaped slit 31S. The difference in inductance between the salient pole direction (dd axis) and the non-salient pole direction (qq axis) is increased by inserting the grain-oriented electrical steel sheet 32 into the arc-shaped slit 21S in a manner to remain. Thus, the motor efficiency (motor characteristics) in the reluctance motor is improved.

  Further, according to the rotor laminated core 30 having the above-described configuration, the directional electromagnetic steel sheet 32 inserted into the arc-shaped slit 31S can be positioned and supported also in the rib 31L formed in the iron core piece 31, and therefore the rotor laminated iron core. The stability of strength at 30 will be improved.

  Furthermore, according to the rotor laminated iron core 30 having the above-described configuration, by inserting the directional electromagnetic steel sheet 32 into the arc-shaped slit 31S, it is said that the connecting portion at the periphery of the iron core piece formed with the arc-shaped slit is removed. Thus, it is possible to achieve further improvement in motor efficiency (motor characteristics) without complicating the process seen in the manufacture of the rotor laminated iron core.

  12 and 13 show a sixth embodiment of a rotor laminated core for a reluctance motor according to the present invention, and this rotor laminated core (rotor laminated core for a reluctance motor) 30 ′ has a predetermined number of cores. Are formed by laminating pieces 31, 31... And integrating these iron core pieces 31, 31..., And a rotation shaft hole 30 O ′ is opened at the center.

  Further, the rotor laminated core 30 'includes gap portions 31Ss of the arc-shaped slits 31S, 31S ... in the rotor laminated core 30 of the fifth embodiment shown in FIG. 13 (a) (FIGS. 10 and 11). As shown in FIG. 13 (b), 31 Ss... Is filled with, for example, connecting bodies 33 made of a nonmagnetic material such as a resin material.

  In other words, the rotor laminated core 30 ′ is different from the rotor laminated core 30 of the fifth embodiment (FIGS. 10 and 11) except that the gaps 31Ss, 31Ss. There is no.

  According to the rotor laminated core 30 ′ having the above-described configuration, the gap 33 </ b> Ss into which the directional electromagnetic steel sheet 32 is not inserted in the arc-shaped slit 31 </ b> S is filled with the coupling body 33 made of a nonmagnetic material. Combined with the same effect as the rotor laminated iron 30 of the embodiment, the rotor laminated iron core 30 ′ is firmly integrated through the connecting member 33, so that the rotor laminated iron core 30 ′ can be used for a long time. Excellent centrifugal resistance against high-speed rotation.

  14 and 15 show a seventh embodiment of a rotor laminated core for a reluctance motor according to the present invention. This rotor laminated core (rotor laminated core for a reluctance motor) 40 has a predetermined number of core pieces. Are formed by laminating 41, 41... And these iron core pieces 41, 41... Are integrated, and a rotation shaft hole 40O is opened at the center.

  Further, each of the core pieces 41, 41,... Constituting the rotor laminated iron core 40 is formed with a plurality of arc-shaped slits 41S, 41S,. Four groups of slits 41S, 41S... Are formed around the rotation shaft hole 41o with an interval.

  As shown in FIG. 15 (a), each of the arc-shaped slits 41S, 41S... Formed concentrically includes arc-shaped slits 41S, 41S adjacent to each other alternately as shown in FIG. Directional electrical steel sheets 42, 42,... Curved along the extending direction of the arc-shaped slit 41S are inserted and installed, and the direction-oriented electrical steel sheets 42, 42,. It is installed in a manner that extends along the extending direction of 41S.

  Here, for each arc-shaped slit 41S, 41S,... Formed concentrically, as shown in FIG. 15 (b), the directional electrical steel sheets 42, .. Are inserted and installed, the gap portions 41Ss, 41Ss,... Remain due to the arc-shaped slits 41S, 41S,.

  According to the rotor laminated core 40 having the above-described configuration, the directional electrical steel sheet 42 is inserted so that the arc-shaped slits 41S and 41S adjacent to each other are alternately arranged with the easy magnetization axis direction along the extending direction of the arc-shaped slit 41S. As a result, the magnetic flux more easily flows in the salient pole direction (dd axis), and the gap 41Ss is formed by the adjacent arc-shaped slits 41S and 41S, so that the salient pole direction (d Since the difference in inductance between the -d axis) and the non-salient pole direction (qq axis) increases, the motor efficiency (motor characteristics) in the reluctance motor is improved.

  Moreover, according to the rotor laminated core 40 of the structure mentioned above, it says that the connection part of the core piece periphery in which the arc-shaped slit was formed is removed by inserting the directional electromagnetic steel plate 42 in the arc-shaped slit 41S. Thus, it is possible to achieve further improvement in motor efficiency (motor characteristics) without complicating the process seen in the manufacture of the rotor laminated iron core.

  FIGS. 16 and 17 show an eighth embodiment of a rotor laminated core for a reluctance motor according to the present invention, and this rotor laminated core (rotor laminated core for a reluctance motor) 40 ′ has a predetermined number of cores. The pieces 41, 41,... Are laminated and the core pieces 41, 41,... Are integrated, and a rotation shaft hole 40O ′ is opened at the center.

  Further, the rotor laminated core 40 ′ has an arcuate shape constituting the gaps 41 Ss, 41 Ss... In the rotor laminated core 40 of the seventh embodiment (FIGS. 14 and 15) shown in FIG. As shown in FIG. 17 (b), the slits 41S, 41S,... Are filled with connecting bodies 43, 43, made of a nonmagnetic material such as a resin material.

  In other words, the rotor laminated core 40 'is the rotation of the seventh embodiment (FIGS. 14 and 15) except that the arcuate slits 41S, 41S... Constituting the gap 41Ss are filled with the coupling bodies 43, 43. There is no difference with the child laminated core 40.

  According to the rotor laminated core 40 ′ having the above-described configuration, the arc-shaped slit 41 </ b> S constituting the gap portion 41 </ b> Ss by the directional electromagnetic steel plate 42 being not inserted among the plurality of arc-shaped slits 41 </ b> S, 41 </ b> S. By filling the connection body 43 made of a non-magnetic material, the rotor laminated iron core 40 ′ is firmly integrated through the connection material 43 together with the same effects as the rotor laminated iron 40 of the seventh embodiment. Thus, the rotor laminated core 40 'is excellent in centrifugal force resistance against high speed rotation over a long period of time.

(a) And (b) is the external appearance top view and external appearance side view which show 1st Example of the rotor laminated iron core for reluctance motors concerning this invention. (a) And (b) is a principal part top view in the rotor lamination | stacking iron core for reluctance motors of FIG. The external appearance perspective view which shows the assembly | attachment aspect of the grain-oriented electrical steel plate in the rotor laminated iron core for reluctance motors of FIG. (a) And (b) is the external appearance top view and external appearance side view which show 2nd Example of the rotor laminated iron core for reluctance motors concerning this invention. (a) And (b) is a principal part top view in the rotor lamination | stacking iron core for reluctance motors of FIG. (a) And (b) is the external appearance top view and external appearance side view which show 3rd Example of the rotor laminated core for reluctance motors concerning this invention. (a) And (b) is a principal part top view in the rotor lamination | stacking iron core for reluctance motors of FIG. (a) And (b) is an external appearance top view and external appearance side view which show 4th Example of the rotor laminated iron core for reluctance motors concerning this invention. (a) And (b) is a principal part top view in the rotor lamination | stacking iron core for reluctance motors of FIG. (a) And (b) is an external appearance top view and external appearance side view which show 5th Example of the rotor lamination | stacking iron core for reluctance motors concerning this invention. (a) And (b) is a principal part top view in the rotor lamination | stacking iron core for reluctance motors of FIG. (a) And (b) is the external appearance top view and external appearance side view which show 6th Example of the rotor laminated iron core for reluctance motors concerning this invention. (a) And (b) is a principal part top view in the rotor lamination | stacking iron core for reluctance motors of FIG. (a) And (b) is the external appearance top view and external appearance side view which show the 7th Example of the rotor laminated iron core for reluctance motors concerning this invention. (a) And (b) is a principal part top view in the rotor lamination | stacking iron core for reluctance motors of FIG. (a) And (b) is the external appearance top view and external appearance side view which show 8th Example of the rotor laminated iron core for reluctance motors concerning this invention. (a) And (b) is a principal part top view in the rotor laminated iron core for FIG. 16 reluctance motors. (a) And (b) is an external appearance top view and external appearance side view of the conventional rotor lamination | stacking iron core for reluctance motors. (a) And (b) is an external appearance top view and cross-sectional side view of the conventional rotor laminated iron core for reluctance motors.

Explanation of symbols

10, 10 '... rotor core for reluctance motor,
11 ... Iron core piece,
11o ... rotating shaft hole,
11S: Arc-shaped slit,
11Ss: gap,
12 ... grain-oriented electrical steel sheet,
13 ... Connected body,
20, 20 '... rotor laminated core for reluctance motor,
21 ... Iron core piece,
21o ... rotating shaft hole,
21S ... arc-shaped slit,
21L ... ribs,
21Ss: gap,
22 ... grain-oriented electrical steel sheet,
23 ... Connected body,
30, 30 '... rotor laminated core for reluctance motor,
31 ... Iron core piece,
31o ... rotating shaft hole,
31S: Arc-shaped slit,
31L ... ribs,
31Ss: gap,
32. Directional electrical steel sheet,
33 ... Connected body,
40, 40 '... rotor laminated core for reluctance motor,
41 ... Iron core piece,
41o ... rotating shaft hole,
41S ... arc-shaped slit,
41Ss: gap,
42 ... grain-oriented electrical steel sheet,
43. A connected body.

Claims (6)

A plurality of arc-shaped slits convex on the rotating shaft hole side are formed concentrically, and the plurality of arc-shaped slits are formed by laminating iron core pieces formed at intervals around the rotating shaft hole, Due to the reluctance torque generated based on the difference in inductance between the salient pole direction in which the magnetic flux easily flows along the extending direction of the arc-shaped slit and the non-salient pole direction in which the magnetic flux does not easily flow along the parallel direction of the arc-shaped slit. In the rotor laminated core for rotating reluctance motor,
The arcuate slit is installed by inserting a grain-oriented electrical steel sheet in such a manner that the easy magnetization axis direction is along the extending direction of the arcuate slit and the gap is left in the arcuate slit. Rotor laminated iron core for reluctance motor. 2. The rotor laminated core for a reluctance motor according to claim 1, wherein a gap made by inserting the grain-oriented electrical steel sheet in the arc-shaped slit is filled with a connecting body made of a nonmagnetic material. A plurality of arc-shaped slits convex on the rotating shaft hole side are formed concentrically, and the plurality of arc-shaped slits are formed by laminating iron core pieces formed at intervals around the rotating shaft hole, Due to the reluctance torque generated based on the difference in inductance between the salient pole direction in which the magnetic flux easily flows along the extending direction of the arc-shaped slit and the non-salient pole direction in which the magnetic flux does not easily flow along the parallel direction of the arc-shaped slit. In the rotor laminated core for rotating reluctance motor,
A rib extending in the radial direction of the iron core piece is formed in the arc-shaped slit, and the easy-magnetization axis direction is along the extending direction of the arc-shaped slit, and the arc-shaped slit is formed in the arc-shaped slit. A rotor laminated iron core for a reluctance motor, wherein a directional electromagnetic steel sheet is inserted and installed in such a manner as to leave a gap. The rotor laminated core for a reluctance motor according to claim 3, wherein a gap made by inserting the grain-oriented electrical steel sheet in the arc-shaped slit is filled with a connecting body made of a nonmagnetic material. A plurality of arc-shaped slits convex on the rotating shaft hole side are formed concentrically, and the plurality of arc-shaped slits are formed by laminating iron core pieces formed at intervals around the rotating shaft hole, Due to the reluctance torque generated based on the difference in inductance between the salient pole direction in which the magnetic flux easily flows along the extending direction of the arc-shaped slit and the non-salient pole direction in which the magnetic flux does not easily flow along the parallel direction of the arc-shaped slit. In the rotor laminated core for rotating reluctance motor,
In a plurality of arc-shaped slits formed concentrically, directional electrical steel sheets are inserted in such a manner that the axis of easy magnetization is aligned with the extending direction of the arc-shaped slit, alternately between the arc-shaped slits adjacent to each other. Rotor laminated iron core for reluctance motors, characterized in that 6. The arcuate slit in which the directional electromagnetic steel sheet is not inserted among the plurality of arcuate slits formed concentrically is filled with a connecting body made of a nonmagnetic material. Rotor cores for reluctance motors.

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