JP5491298B2 - Rotor, motor, and method of manufacturing rotor - Google Patents

Description

  The present invention relates to a rotor, a motor, and a method of manufacturing the rotor that employ a consequent pole type structure.

  As a rotor used in a motor, for example, as shown in Patent Document 1, a plurality of magnets of one magnetic pole are arranged in the circumferential direction of the outer peripheral portion of a rotor core, and salient poles integrally formed on the core are each There is known a rotor having a so-called continuous pole type structure in which a gap is provided between magnets and the salient pole functions as the other magnetic pole.

JP 9-327139 A

  By the way, in a rotor having a normal configuration in which all the magnetic poles are composed of magnets, the magnetic flux on the magnet back side (inside in the radial direction) is evenly separated from the center in the circumferential direction to both sides, and the magnetic balance of the rotor is improved. ing. On the other hand, in a rotor having a consequent pole type structure as in Patent Document 1, since the salient pole itself does not have a magnetic force forcing (induction), from the occasional positional relationship with the teeth of the opposing stator, The magnetic flux on the back side of the magnet is often guided so as to pass through the salient poles having a small magnetic resistance without being evenly separated from the circumferential central part into the salient poles on both sides. In other words, the direction of the magnetic flux and the amount of magnetic flux at the salient pole part become more prominent, so the rotor becomes magnetically unbalanced, which leads to deterioration in rotational performance such as reduction in motor torque and increase in vibration. Yes.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotor capable of improving the magnetic balance and thus improving the rotational performance, and a motor including the rotor. And a method of manufacturing a rotor.

  In order to solve the above problems, in the invention according to claim 1, a plurality of magnets of one magnetic pole are arranged in the circumferential direction of the outer peripheral portion of the rotor core, and salient poles provided on the rotor core are provided between the magnets. The rotor is arranged with an air gap and functions so that the salient pole functions as the other magnetic pole. The rotor core has a radially inner end on the radially inner side of the magnet. A magnet side slit extending in the radial direction to the radially inner end is formed, and a salient pole side slit extending in the radial direction to the radially inner end of the rotor core is formed on the radially inner side of the salient pole in the rotor core. The diameter of the rotor core that is spaced circumferentially by the magnet-side slit and the salient pole-side slit is radially inward of the rotor core. The non-magnetic member for connecting direction inside end portions are provided and summarized as.

  According to this configuration, a magnet side slit is formed on the radially inner side of the magnet in the rotor core, with the magnet serving as a radially outer end, and extending radially to the radially inner end of the rotor core. The deviation of the magnetic flux flow between the salient poles on both sides in the direction can be suppressed. Also, the magnet side slit is formed from the magnet to the radially inner end of the rotor core, and the radially inner ends of the rotor core separated in the circumferential direction by the magnet side slit are connected by a nonmagnetic member. The flow of magnetic flux between the radially inner ends of the rotor core separated in the circumferential direction by the magnet-side slit can also be suitably suppressed.

  In addition, since a salient pole side slit extending in the radial direction to the radially inner end of the rotor core is formed inside the salient pole in the rotor core, the magnetic flux between the salient pole and both magnets on both sides in the circumferential direction is formed. The uneven flow can be suppressed. In addition, the salient pole side slit is formed up to the radially inner end of the rotor core, and the radially inner ends of the rotor core separated in the circumferential direction by the salient pole side slit are connected by a nonmagnetic member. Further, the flow of magnetic flux between the radially inner ends of the rotor core separated in the circumferential direction by the salient pole side slit can also be suitably suppressed. For these reasons, it is possible to improve the magnetic balance of the rotor, and thus to improve the rotational characteristics such as torque characteristics and vibration characteristics.

  In the invention according to claim 2, the rotor according to claim 1 is an 8-pole rotor in which four magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in a circumferential direction, and a 12-slot stator having windings wound around the teeth in a concentrated manner, the circumferential width Wm of the magnet and the circumference of the magnet side slit. The gist is that the ratio Wsm / Wm to the direction width Wsm is set to satisfy (Wsm / Wm) ≦ 0.1.

  According to this configuration, in the 8-pole, 12-slot, concentrated winding motor, the ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is (Wsm / Wm) ≦ 0.1. It is set to satisfy. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to 99% or more of the maximum (as compared with Wsm / Wm = 0 without the magnet side slit) (experiment in FIG. 2). See results).

  According to a third aspect of the present invention, the rotor according to the first aspect is an 8-pole rotor in which the four magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in a circumferential direction, and a 12-slot stator in which windings are wound around the teeth in a concentrated manner, the circumferential width Wf of the salient poles and the salient pole side slits. The gist is that the ratio Wsf / Wf to the circumferential width Wsf is set so as to satisfy (Wsf / Wf) ≦ 0.2.

  According to this configuration, in the 8-pole, 12-slot, concentrated winding motor, the ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is (Wsf / Wf) ≦ 0. .2 is set. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to approximately 99% or more of the maximum (with respect to the case of Wsf / Wf = 0 without the salient pole side slit) (see FIG. 3). See experimental results).

  According to a fourth aspect of the present invention, the rotor according to the first aspect is an 8-pole rotor in which the four magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in the circumferential direction, and the stator includes a 24-slot stator in which windings are wound around the teeth in a full-pitch manner, and the circumferential width Wm of the magnet and the slits on the magnet side are provided. The gist is that the ratio Wsm / Wm to the circumferential width Wsm is set to satisfy (Wsm / Wm) ≦ 0.085.

  According to this configuration, in the 8-pole, 24-slot, full-pitch motor, the ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet-side slit is (Wsm / Wm) ≦ 0. 085 is set to be satisfied. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to approximately 99% or more of the maximum (with respect to the case of Wsm / Wm = 0 without the magnet side slit) (experiment of FIG. 5). See results).

  In the invention according to claim 5, the rotor according to claim 1 is an 8-pole rotor in which four magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in a circumferential direction, and the stator includes a 24-slot stator in which windings are wound around the teeth in full-pitch winding, and the circumferential width Wf of the salient pole and the salient pole side The gist is that the ratio Wsf / Wf to the circumferential width Wsf of the slit is set to satisfy (Wsf / Wf) ≦ 0.18.

  According to this configuration, in the 8-pole, 24-slot, full-pitch motor, the ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is (Wsf / Wf) ≦ It is set to satisfy 0.18. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to 99% or more of the maximum (relative to the case where Wsf / Wf = 0 without the salient pole side slit) (see FIG. 6). See experimental results).

  In a sixth aspect of the present invention, the rotor according to the first aspect is a 10-pole rotor in which the five magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in a circumferential direction, and a 12-slot stator having windings wound around the teeth in a concentrated manner, the circumferential width Wm of the magnet and the circumference of the magnet side slit. The gist is that the ratio Wsm / Wm to the direction width Wsm is set to satisfy (Wsm / Wm) ≦ 0.12.

  According to this configuration, in a 10 pole, 12 slot, concentrated winding motor, the ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is (Wsm / Wm) ≦ 0.12. It is set to satisfy. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to approximately 99% or more of the maximum (with respect to the case of Wsm / Wm = 0 without the magnet side slit) (experiment of FIG. 8). See results).

  In the invention according to claim 7, the rotor according to claim 1 is a 10-pole rotor in which five magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in a circumferential direction, and a 12-slot stator in which windings are wound around the teeth in a concentrated manner, the circumferential width Wf of the salient poles and the salient pole side slits. The gist is that the ratio Wsf / Wf to the circumferential width Wsf is set so as to satisfy (Wsf / Wf) ≦ 0.15.

  According to this configuration, in a 10 pole, 12 slot, concentrated winding motor, the ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is (Wsf / Wf) ≦ 0. .15 is set. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to 99% or more of the maximum (relative to the case of Wsf / Wf = 0 without the salient pole side slit) (FIG. 9). See experimental results).

  In the invention according to claim 8, the rotor according to claim 1 is a 10-pole rotor in which the five magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in the circumferential direction, and the teeth include a 30-slot stator having windings wound around the teeth in full-pitch winding, and the circumferential width Wm of the magnet and the magnet side slits The gist is that the ratio Wsm / Wm to the circumferential width Wsm is set to satisfy (Wsm / Wm) ≦ 0.1.

  According to this configuration, in a 10-pole, 30-slot, full-pitch motor, the ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is (Wsm / Wm) ≦ 0. 1 is set to satisfy. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to approximately 99% or more of the maximum (with respect to the case where Wsm / Wm = 0 without the magnet side slit) (experiment of FIG. 11). See results).

  In a ninth aspect of the present invention, the rotor according to the first aspect is a 10-pole rotor in which the five magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Provided in the circumferential direction, and a 30-slot stator in which the winding is wound around the teeth in a full-pitch winding, and the circumferential width Wf of the salient pole and the salient pole side The gist is that the ratio Wsf / Wf to the circumferential width Wsf of the slit is set to satisfy (Wsf / Wf) ≦ 0.15.

  According to this configuration, in a 10-pole, 30-slot, full-pitch motor, the ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole-side slit is (Wsf / Wf) ≦ It is set to satisfy 0.15. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to approximately 99% or more of the maximum (with respect to the case of Wsf / Wf = 0 without the salient pole side slit) (see FIG. 12). See experimental results).

  According to a tenth aspect of the present invention, the rotor according to the first aspect is an eight-pole rotor in which four magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in the circumferential direction, and the stator includes a 24-slot stator in which windings are wound around the teeth in a full-pitch manner, and the circumferential width Wm of the magnet and the circumference of the magnet The gist is that the ratio Wzm / Wm to the displacement width Wzm in the rotational direction of the magnet side slit from the center of the direction is set to satisfy −0.45 <(Wzm / Wm) <0.

  According to this configuration, in the 8-pole, 24-slot, full-pitch motor, the ratio Wzm / Wm between the circumferential width Wm of the magnet and the displacement width Wzm from the circumferential center of the magnet to the rotation direction of the magnet-side slit. Is set to satisfy −0.45 <(Wzm / Wm) <0. Therefore, the torque can be greater than 100% (as compared to the case of Wzm / Wm = 0 in which a magnet-side slit is formed at the center in the circumferential direction of the magnet) (see the experimental result in FIG. 14A). Further, the cogging torque can be made smaller than 100% (as compared to the case of Wzm / Wm = 0 in which the magnet side slit is formed at the center in the circumferential direction of the magnet) (see the experimental result in FIG. 14B).

  According to an eleventh aspect of the present invention, the rotor according to the first aspect is an eight-pole rotor in which four magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in the circumferential direction, and the stator includes a 24-slot stator in which the windings are wound in full-pitch winding, and the circumferential width Wf of the salient poles in the circumferential direction. The ratio Wzf / Wf to the deviation width Wzf in the rotational direction of the salient pole side slit from the circumferential center between the adjacent magnets was set to satisfy −0.42 <(Wzf / Wf) <0. This is the gist.

  According to this configuration, in the 8-pole, 24-slot, full-pitch motor, the circumferential width Wf of the salient pole and the deviation from the circumferential center between adjacent magnets in the circumferential direction in the rotational direction of the salient pole-side slit. The ratio Wzf / Wf to the width Wzf is set so as to satisfy −0.42 <(Wzf / Wf) <0. Therefore, the torque can be made larger than 100% (as compared to the case of Wzf / Wf = 0 in which a salient pole side slit is formed at the circumferential center between circumferentially adjacent magnets) (in FIG. 15A). See experimental results).

  According to a twelfth aspect of the present invention, the rotor according to the first aspect is a 10-pole rotor in which five magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Are provided in a circumferential direction, and a 30-slot stator in which windings are wound around the teeth in a full-pitch winding, and includes a circumferential width Wm of the magnet, and a circumference of the magnet. The ratio Wzm / Wm to the deviation width Wzm in the rotation direction of the magnet side slit from the center of the direction satisfies −0.32 ≦ (Wzm / Wm) ≦ 0.3 (except for Wzm / Wm = 0). The summary is as follows.

  According to this configuration, in a 10-pole, 30-slot, full-pitch motor, a ratio Wzm / Wm between the circumferential width Wm of the magnet and the displacement width Wzm from the circumferential center of the magnet to the rotation direction of the magnet-side slit. Is set to satisfy −0.32 ≦ (Wzm / Wm) ≦ 0.3 (except for Wzm / Wm = 0). Therefore, the torque can be set to 99% or more of the maximum (relative to the case of Wzm / Wm = 0 in which the magnet-side slit is formed at the center in the circumferential direction of the magnet) (see the experimental result in FIG. 17A). . Also, the radial force pulsation or cogging torque can be made smaller than 100% (as compared to the case of Wzm / Wm = 0 in which the magnet side slit is formed at the center in the circumferential direction of the magnet) (FIGS. 17A and 17B). Refer to the experimental result of b)).

  In a thirteenth aspect of the present invention, the rotor according to the first aspect is a 10-pole rotor in which five magnets are arranged in the circumferential direction of the rotor core, and the rotor and teeth extending in the radial direction. Is provided in the circumferential direction, and the stator is provided with a 30-slot stator in which windings are wound around the teeth in a full-pitch winding, and a circumferential width Wf of the salient poles in the circumferential direction. The ratio Wzf / Wf of the deviation width Wzf in the rotation direction of the salient pole side slit from the circumferential center between the adjacent magnets is −0.15 ≦ (Wzf / Wf) ≦ 0.11 (Wzf / The gist is that it is set to satisfy (except for Wf = 0).

  According to this configuration, in a 10-pole, 30-slot, full-pitch motor, the circumferential width Wf of the salient pole and the deviation from the circumferential center between adjacent magnets in the circumferential direction in the rotational direction of the salient pole-side slit. The ratio Wzf / Wf to the width Wzf is set so as to satisfy −0.15 ≦ (Wzf / Wf) ≦ 0.11 (except for Wzf / Wf = 0). Therefore, the torque can be substantially 99% or more (relative to the case of Wzf / Wf = 0 in which a salient pole side slit is formed at the circumferential center between adjacent magnets in the circumferential direction) (FIG. 18 ( (See experimental results in a)).

In the invention according to claim 14, the rotor according to claim 1 is a (2 × N) pole rotor in which N (where N ≧ 4) magnets are arranged in the circumferential direction of the rotor core. A motor including the rotor and (12 × N) teeth that extend in the circumferential direction and (12 × N) slot stators in which windings are wound around the teeth in distributed winding. The ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is (Wsm / Wm) ≦ 0.1.
The gist is that it was set to satisfy the above.

  According to this configuration, in the motor of (2 × N) poles, (12 × N) slots, distributed winding, the ratio Wsm / Wm of the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is ( (Wsm / Wm) ≦ 0.1. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is set to 99% or more of the maximum (with respect to the case of Wsm / Wm = 0 without the magnet side slit) (see FIGS. 20 and 20). (See 21 experimental results).

  In the invention according to claim 15, the rotor according to claim 1 is a (2 × N) pole rotor in which N (however, ≧ 4) magnets are arranged in the circumferential direction of the rotor core, A motor provided with the rotor and a (12 × N) slot stator in which (12 × N) teeth extending in the radial direction are provided in the circumferential direction, and windings are wound around the teeth by distributed winding. The gist is that the ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is set to satisfy (Wsf / Wf) ≦ 0.3. To do.

  According to this configuration, in the motor of (2 × N) poles, (12 × N) slots, and distributed winding, the ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is , (Wsf / Wf) ≦ 0.3. Therefore, the radial force pulsation can be reduced and the vibration can be reduced while the torque is substantially 99% or more (relative to the case of Wsf / Wf = 0 without the salient pole side slit) (see FIG. 22 and FIG. 22). (See experimental results in FIG. 23).

  According to a sixteenth aspect of the present invention, in the rotor according to the first aspect, the rotor core has a block formed by dividing the rotor core by the magnet side slit and the salient pole side slit when viewed from the axial direction. The gist is that a plurality of rotor core plates that are developed with the slit and the salient pole side slit as a boundary and that can be arrayed continuously in a substantially straight line are spirally laminated.

  According to this configuration, compared to the case of punching a substantially circular rotor core plate material, which is a rotor core, by simply laminating from the steel plate, the waste of the steel plate during the punching process of punching the rotor core plate material is reduced and the yield is improved. can do. That is, when a substantially circular rotor core plate material is simply punched out, steel sheets are likely to be wasted at the four corners, etc., but a shape in which a large number of the blocks can be arranged in a substantially straight line as in the above configuration. If the rotor core plate material is punched in the substantially straight shape, the waste of the steel plate can be reduced. In addition, when closing the block developed with the slit on the magnet side in the spiral laminating process, the magnet embedded in the rotor core is arranged in advance so that the block (rotor core) and the magnet are arranged in advance. Can be brought into close contact with each other in the radial direction. As a result, the radial air gap between the rotor core and the magnet embedded in the rotor core can be easily reduced, and as a result, the efficiency of the motor can be increased.

  The invention according to claim 17 is the method for manufacturing a rotor according to claim 1, wherein the rotor core is divided by the magnet side slit and the salient pole side slit when viewed from the axial direction, and the magnet has a block. A punching process in which a large number of continuously arranged rotor core plates are formed by punching from a steel plate, and the rotor core plates are spirally laminated. And a spiral laminating step for obtaining the rotor core.

  According to the invention, in the punching process, a block having a shape obtained by dividing the rotor core by the magnet side slit and the salient pole side slit as viewed from the axial direction is developed with the magnet side slit and the salient pole side slit as a boundary, and is substantially linear. A plate material for a rotor core having a shape arranged in large numbers in succession is obtained by punching from a steel plate. In the spiral lamination step, the rotor core plate materials are laminated in a spiral shape to obtain the rotor core. In this case, for example, compared to the case of punching out a substantially circular rotor core plate material that becomes a rotor core by simply laminating, it is possible to reduce the waste of the steel plate and improve the yield. That is, when a substantially circular rotor core plate is simply punched out, steel plates are likely to be wasted at the four corners, etc., but in the above method, the rotor core plate having a shape in which a large number of the blocks are arranged substantially linearly is used. Since punching is performed, waste of the steel sheet can be reduced. In addition, when closing a block developed with the slit on the magnet side in the spiral laminating process, a magnet embedded in the rotor core is arranged in advance so that the block (rotor core) and the magnet are arranged in the radial direction. It becomes possible to make it close. As a result, the radial air gap between the rotor core and the magnet embedded in the rotor core can be easily reduced, and as a result, the efficiency of the motor can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, the improvement of a magnetic balance can be aimed at and the rotor which can aim at the improvement of a rotational performance by extension, the motor provided with the rotor, and the manufacturing method of a rotor can be provided.

(A) The top view of the motor in 1st Embodiment. (B) A partially enlarged view of the rotor. The characteristic view which shows the relationship between ratio Wsm / Wm, radial force pulsation Z, and torque T in 1st Embodiment. The characteristic view which shows the relationship between ratio Wsf / Wf, radial force pulsation Z, and torque T in 1st Embodiment. The top view of the motor in 2nd Embodiment. The characteristic view which shows the relationship between ratio Wsm / Wm, radial force pulsation Z, and torque T in 2nd Embodiment. The characteristic view which shows the relationship between ratio Wsf / Wf, radial force pulsation Z, and torque T in 2nd Embodiment. (A) The top view of the motor in 3rd Embodiment. (B) A partially enlarged view of the rotor. The characteristic view which shows the relationship between ratio Wsm / Wm, radial force pulsation Z, and torque T in 3rd Embodiment. The characteristic view which shows the relationship between ratio Wsf / Wf, radial force pulsation Z, and torque T in 3rd Embodiment. The top view of the motor in 4th Embodiment. The characteristic view which shows the relationship of ratio Wsm / Wm, radial force pulsation Z, and torque T in 4th Embodiment. The characteristic view which shows the relationship between ratio Wsf / Wf, radial force pulsation Z, and torque T in 4th Embodiment. (A) The top view of the motor in 5th Embodiment. (B) A partially enlarged view of the rotor. (A) The characteristic view which shows the relationship between ratio Wzm / Wm, radial force pulsation Z, and torque T in 5th Embodiment. (B) The characteristic view which shows the relationship between ratio Wzm / Wm, cogging torque C, and torque T similarly. (A) The characteristic view which shows the relationship between ratio Wzf / Wf, radial force pulsation Z, and torque T in 5th Embodiment. (B) The characteristic view which similarly shows the relationship between ratio Wzf / Wf, cogging torque C, and torque T. FIG. (A) The top view of the motor in 6th Embodiment. (B) A partially enlarged view of the rotor. (A) The characteristic view which shows the relationship between ratio Wzm / Wm, radial force pulsation Z, and torque T in 6th Embodiment. (B) The characteristic view which shows the relationship between ratio Wzm / Wm, cogging torque C, and torque T similarly. (A) The characteristic view which shows the relationship between ratio Wzf / Wf, radial force pulsation Z, and torque T in 6th Embodiment. (B) The characteristic view which similarly shows the relationship between ratio Wzf / Wf, cogging torque C, and torque T. FIG. (A) The top view of the motor in 7th Embodiment. (B) A partially enlarged view of the rotor. The characteristic view which shows the relationship between ratio Wsm / Wm and torque T in 7th Embodiment. The characteristic view which shows the relationship between ratio Wsm / Wm and radial force pulsation Z in 7th Embodiment. The characteristic view which shows the relationship between ratio Wsf / Wf and the torque T in 7th Embodiment. The characteristic view which shows the relationship between ratio Wsf / Wf and radial force pulsation Z in 7th Embodiment. The top view of the board | plate material for rotor cores in 8th Embodiment. (A) The schematic diagram for demonstrating the manufacturing method of the rotor in 8th Embodiment. (B) The schematic diagram for demonstrating the manufacturing method of a rotor similarly. (A)-(e) The top view of the board | plate material for rotor cores in another example. The top view of the rotor in another example.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1A shows an inner rotor type brushless motor (hereinafter simply referred to as a motor) M for one-way rotation. As shown in FIG. 1A, the stator 10 of the motor M has a stator core 11 provided with a plurality of teeth 12a (12 in this embodiment) extending inward in the radial direction and concentrated on the teeth 11a. And a winding 12 wound by winding. That is, the stator 10 of the present embodiment is a 12-slot concentrated winding type.

  Further, as shown in FIGS. 1A and 1B, the rotor 20 of the motor M includes a substantially annular rotor core 23 that is externally fitted to the outer peripheral surface of the rotating shaft 21 via an annular nonmagnetic member 22. Have Four N-pole magnets 24 are embedded and arranged in the circumferential direction of the outer peripheral portion of the rotor core 23 (at intervals of 90 °). The magnet 24 embedded in the rotor core 23 of the present embodiment is formed in a substantially rectangular parallelepiped shape, and the longitudinal direction is arranged along the orthogonal direction of the radial direction when viewed from the axial direction of the rotor 20. Further, salient poles 23 a formed on the outer peripheral portion of the rotor core 23 are disposed between the magnets 24 with a gap K therebetween. The gaps K are formed on both sides of the magnet 24 in the circumferential direction, and the rotation direction side (counterclockwise direction side in FIG. 1B) as viewed from the axial direction (the width in the circumferential direction). , And hence the area). Further, the gap K on the rotation direction side (counterclockwise direction side in FIG. 1B) of the magnet 24 in the present embodiment is opened to the outside in the radial direction, and the counter rotation direction side (in FIG. 1B). The clockwise outer side gap K is not open radially outward by the thin portion 23b of the rotor core 23 that connects the outer side of the magnet 24 in the rotor core 23 in the radial direction and the salient pole 23a. In addition, the rotor core 23 of the present embodiment is interposed between the magnet 24 and the gap K on the rotation direction side of the magnet 24 (counterclockwise direction side in FIG. 1B) and the magnet 24 in the rotor core 23. The thin-walled portion 23c is connected between the radially outer side and the radially inner side. That is, the magnets 24 and the salient poles 23a are alternately arranged at equiangular (45 °) intervals, and the rotor 20 has eight poles (eight poles) that make the salient poles 23a function as S poles with respect to the N pole magnets 24. The so-called continuous pole type.

  Here, as shown in FIG. 1 (b), on the radially inner side of the magnet 24 in the rotor core 23, the magnet 24 is used as the radially outer end (from the magnet 24) to the radially inner end of the rotor core 23 (from the magnet 24). A magnet-side slit 23d extending in the radial direction (so as to open radially inward) is formed. In addition, a salient pole-side slit 23e extending in the radial direction to the radially inner end of the rotor core 23 is formed on the radially inner side of the salient pole 23a in the rotor core 23 (so as to open to the radially inner side). The magnet side slit 23d of the present embodiment is formed along the circumferential center of the magnet 24, and the salient pole side slit 23e is formed along the circumferential center between the magnets 24 adjacent in the circumferential direction. Yes. Further, on the outer side in the radial direction of the salient pole side slit 23e in the rotor core 23, a thin portion 23f that connects both sides (blocks) of the salient pole side slit 23e in the circumferential direction is formed.

  Further, the non-magnetic member 22 is provided (internally fitted) on the inner side in the radial direction of the rotor core 23, and the rotor core 23 (its part) is separated in the circumferential direction by the magnet side slit 23d and the salient pole side slit 23e. The radially inner ends of each block) are connected by a nonmagnetic member 22.

  Here, the ratio Wsm / Wm between the circumferential width Wm of the magnet 24 and the circumferential width Wsm of the magnet side slit 23d is set to satisfy (Wsm / Wm) ≦ 0.1. Incidentally, the magnet side slit 23d of the present embodiment has a circumferential width on the radially inner side that is narrower than that on the radially outer side, but as shown in FIG. 1B, the circumferential width Wsm of the magnet side slit 23d. Is the circumferential width on the radially outer side of the magnet-side slit 23d (width in the direction orthogonal to the radial direction).

Further, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 23a and the circumferential width Wsf of the salient pole side slit 23e is set to satisfy (Wsf / Wf) ≦ 0.2.
Next, characteristic actions and effects of the first embodiment will be described below.

  (1) Since a magnet side slit 23d extending in the radial direction to the radially inner end of the rotor core 23 is formed on the radially inner side of the magnet 24 in the rotor core 23, the magnet 24 is formed. And the deviation of the flow of magnetic flux between the salient poles 23a on both sides in the circumferential direction can be suppressed. Further, the magnet-side slit 23d is formed from the magnet 24 to the radially inner end of the rotor core 23, and the radially inner ends of the rotor core 23 that are separated in the circumferential direction by the magnet-side slit 23d are nonmagnetic members 22. Connected. Thereby, the flow of the magnetic flux between the radially inner ends of the rotor core 23 separated in the circumferential direction by the magnet-side slit 23d can also be suitably suppressed.

  In addition, since salient pole-side slits 23e extending in the radial direction to the radially inner end of the rotor core 23 are formed on the radially inner side of the salient pole 23a in the rotor core 23, both the salient pole 23a and both circumferential sides thereof are formed. The bias of the magnetic flux flow with the magnet 24 can be suppressed. Further, the salient pole side slits 23e are formed up to the radially inner end of the rotor core 23, and the radially inner ends of the rotor core 23 separated in the circumferential direction by the salient pole side slit 23e are nonmagnetic members 22. Connected. Thereby, the flow of the magnetic flux between the radially inner ends of the rotor core 23 separated in the circumferential direction by the salient pole side slits 23e can also be suitably suppressed. For these reasons, it is possible to improve the magnetic balance of the rotor 20 and thus to improve rotational characteristics such as torque characteristics and vibration characteristics.

  (2) In the 8-pole, 12-slot, concentrated winding motor M, the ratio Wsm / Wm between the circumferential width Wm of the magnet 24 and the circumferential width Wsm of the magnet-side slit 23d is (Wsm / Wm) ≦ 0.1. It is set to satisfy. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is set to 99% or more, which is substantially the maximum (with respect to the case where Wsm / Wm = 0 without the magnet-side slit 23d) (FIG. (See 2 experimental results).

  Specifically, FIG. 2 shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wsm / Wm is changed by experiment. In this experiment, the ratio Wsf / Wf is 0.089, which is a constant state. As shown in FIG. 2, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.1, the torque T is 99% or more of the case where there is no magnet side slit 23d (when Wsm / Wm = 0). It turns out that it becomes. Further, as shown in FIG. 2, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.1, the radial force pulsation Z has no magnet side slit 23d (when Wsm / Wm = 0). It turns out that it becomes smaller. Therefore, in the present embodiment, the ratio Wsm / Wm is set to satisfy (Wsm / Wm) ≦ 0.1.

  In addition, as shown in FIG. 2, when the ratio Wsm / Wm satisfies (Wsm / Wm) <0.07, the torque T is larger than the case where there is no magnet side slit 23d (when Wsm / Wm = 0). It can be seen that the value is (greater than 100%). Further, as shown in FIG. 2, when the ratio Wsm / Wm is 0.035, it can be seen that the torque T becomes the maximum value. Further, as shown in FIG. 2, it can be seen that there is an inflection point of the radial force pulsation Z where the ratio Wsm / Wm is 0.04. The inflection point refers to a point where the slope changes greatly compared to other parts.

  (3) In the 8-pole, 12-slot, concentrated winding motor M, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 23a and the circumferential width Wsf of the salient pole side slit 23e is (Wsf / Wf) ≦ 0. .2 is set. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is substantially 99% or more (relative to the case of Wsf / Wf = 0 without the salient pole side slit 23e). (See experimental results in FIG. 3).

  Specifically, FIG. 3 shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wsf / Wf is changed by experiment. In this experiment, the ratio Wsm / Wm is 0.035, which is a constant state. As shown in FIG. 3, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.2, the torque T is 99% of the case without the salient pole side slit 23e (when Wsf / Wf = 0). It turns out that it becomes the above. Further, as shown in FIG. 3, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.2, the radial force pulsation Z has no salient pole side slit 23e (Wsf / Wf = 0). It turns out that it becomes smaller. Therefore, in the present embodiment, the ratio Wsf / Wf is set to satisfy (Wsf / Wf) ≦ 0.2.

  As shown in FIG. 3, when the ratio Wsf / Wf satisfies (Wsf / Wf) <0.15, the torque T is greater than when there is no salient pole side slit 23e (when Wsf / Wf = 0). It can be seen that the value is large (greater than 100%). In addition, as shown in FIG. 3, when the ratio Wsf / Wf is 0.089, it can be seen that the torque T becomes the maximum value. Further, as shown in FIG. 3, it can be seen that there is an inflection point of the radial force pulsation Z when the ratio Wsf / Wf is 0.04.

(Second Embodiment)
A second embodiment embodying the present invention will be described below with reference to FIG. 1B and FIGS. In the second embodiment, parts that are substantially the same as those in the first embodiment are given the same reference numerals, and a detailed description thereof is partially omitted.

  As shown in FIG. 4, the stator 31 in the motor M of the second embodiment includes a cylindrical portion 32a and a plurality of teeth 32b extending inward in the radial direction from the cylindrical portion 32a and provided in the circumferential direction (24 in this example). The stator core 32 having A segment winding 34 as a winding for generating a magnetic field for rotating the rotor 20 is inserted between the teeth 32 b of the stator core 32. The rotor 20 of the second embodiment is the same as the rotor 20 of the first embodiment.

  The segment windings 34 of the stator 31 are multiphase (three phases). The segment winding 34 includes a slot insertion portion 35a disposed in the slot so as to penetrate the slot between the teeth 32b in the axial direction (perpendicular to the paper surface), and a slot protrusion (not shown) protruding in the axial direction from the slot. For each phase. The segment conductors 35 for each phase are configured to be electrically connected in the circumferential direction at the slot protrusions. Each segment conductor 35 is formed in a substantially U shape by bending a conductor plate, and a pair of slot insertion portions 35a corresponding to U-shaped parallel straight portions includes three pieces in the circumferential direction. It is arranged in two slots that are separated from each other across the teeth 32b. That is, the stator 31 of the second embodiment is of 24 slots and full-pitch winding.

  Here, the ratio Wsm / Wm between the circumferential width Wm of the magnet 24 (see FIG. 1B) and the circumferential width Wsm of the magnet-side slit 23d is set to satisfy (Wsm / Wm) ≦ 0.085. Has been.

Furthermore, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 23a and the circumferential width Wsf of the salient pole side slit 23e is set to satisfy (Wsf / Wf) ≦ 0.18.
Next, characteristic effects (other than those described above) of the second embodiment will be described below.

  (1) In the 8-pole, 24-slot, full-pitch motor M, the ratio Wsm / Wm between the circumferential width Wm of the magnet 24 and the circumferential width Wsm of the magnet-side slit 23d is (Wsm / Wm) ≦ 0. 085 is set to be satisfied. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is set to 99% or more, which is substantially the maximum (with respect to the case where Wsm / Wm = 0 without the magnet-side slit 23d) (FIG. (See 5 experimental results).

  Specifically, FIG. 5 shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wsm / Wm is changed by experiment. In this experiment, the ratio Wsf / Wf is 0.089, which is a constant state. As shown in FIG. 5, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.085, the torque T is 99% or more of the case where there is no magnet side slit 23d (when Wsm / Wm = 0). It turns out that it becomes. Further, as shown in FIG. 5, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.085, the radial force pulsation Z has no magnet-side slit 23d (when Wsm / Wm = 0). It turns out that it becomes smaller. Therefore, in the present embodiment, the ratio Wsm / Wm is set to satisfy (Wsm / Wm) ≦ 0.085.

As shown in FIG. 5, it can be seen that there is an inflection point of radial force pulsation Z where the ratio Wsm / Wm is 0.04.
(2) In the 8-pole, 24-slot, full-pitch motor M, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 23a and the circumferential width Wsf of the salient pole side slit 23e is (Wsf / Wf) ≦ It is set to satisfy 0.18. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is substantially 99% or more (relative to the case of Wsf / Wf = 0 without the salient pole side slit 23e). (See experimental results in FIG. 6).

  Specifically, FIG. 6 shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wsf / Wf is changed by experiment. In this experiment, the ratio Wsm / Wm is 0.035, which is a constant state. As shown in FIG. 6, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.18, the torque T is 99% of the case without the salient pole side slit 23e (when Wsf / Wf = 0). It turns out that it becomes the above. Further, as shown in FIG. 6, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.18, the radial force pulsation Z has no salient pole side slit 23e (when Wsf / Wf = 0). It turns out that it becomes smaller. Therefore, in the present embodiment, the ratio Wsf / Wf is set to satisfy (Wsf / Wf) ≦ 0.18.

As shown in FIG. 6, it can be seen that there is an inflection point of the radial force pulsation Z when the ratio Wsf / Wf is 0.1.
(Third embodiment)
A third embodiment of the present invention will be described below with reference to FIGS. In the third embodiment, parts that are substantially the same as those in the first embodiment (see FIG. 1) (particularly the stator 10) are given the same reference numerals, and a detailed description thereof is partially omitted. .

  As shown in FIGS. 7A and 7B, the rotor 41 in the motor M of the third embodiment is substantially fitted on the outer peripheral surface of the rotating shaft 21 via an annular nonmagnetic member 22. An annular rotor core 42 is provided. Five N-pole magnets 43 are embedded and arranged in the circumferential direction of the outer peripheral portion of the rotor core 42 (at intervals of 72 °). Further, salient poles 42 a formed on the outer peripheral portion of the rotor core 42 are arranged between the magnets 43 with a gap K therebetween. That is, the magnets 43 and the salient poles 42a are alternately arranged at equiangular (36 °) intervals, and the rotor 41 has 10 poles (10 poles) that cause the salient poles 42a to function as the S poles with respect to the N pole magnets 43. The so-called continuous pole type.

  Further, as shown in FIG. 7B, on the radially inner side of the magnet 43 in the rotor core 42, the magnet 43 serves as the radially outer end (from the magnet 43) to the radially inner end of the rotor core 42 (diameter). A magnet side slit 42b extending in the radial direction (so as to open inward in the direction) is formed. A salient pole side slit 42c extending in the radial direction to the radially inner end of the rotor core 42 (so as to open radially inward) is formed on the radially inner side of the salient pole 42a in the rotor core 42.

  Here, the ratio Wsm / Wm between the circumferential width Wm of the magnet 43 and the circumferential width Wsm of the magnet side slit 42b is set to satisfy (Wsm / Wm) ≦ 0.12. The magnet side slit 42b of the present embodiment has a circumferential width on the radially inner side wider than that on the radially outer side. However, as shown in FIG. 7B, the circumferential width Wsm of the magnet side slit 42b. Is the circumferential width on the radially outer side of the magnet side slit 42b (width in the direction orthogonal to the radial direction).

Further, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 42a and the circumferential width Wsf of the salient pole side slit 42c is set to satisfy (Wsf / Wf) ≦ 0.15.
Next, characteristic effects (other than those described above) of the third embodiment will be described below.

  (1) In the motor M with 10 poles, 12 slots, and concentrated winding, the ratio Wsm / Wm between the circumferential width Wm of the magnet 43 and the circumferential width Wsm of the magnet side slit 42b is (Wsm / Wm) ≦ 0.12. It is set to satisfy. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is set to approximately 99% or more of the maximum (with respect to the case of Wsm / Wm = 0 without the magnet side slit 42b) (FIG. (See 8 experimental results).

  Specifically, FIG. 8 shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wsm / Wm is changed by experiment. In this experiment, the ratio Wsf / Wf is 0.089, which is a constant state. As shown in FIG. 8, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.12, the torque T is 99% or more of the case where there is no magnet-side slit 42b (when Wsm / Wm = 0). It turns out that it becomes. Further, as shown in FIG. 8, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.12, the radial force pulsation Z has no magnet side slit 42b (when Wsm / Wm = 0). It turns out that it becomes smaller. Therefore, in the present embodiment, the ratio Wsm / Wm is set to satisfy (Wsm / Wm) ≦ 0.12.

  As shown in FIG. 8, it can be seen that there is an inflection point of torque T where the ratio Wsm / Wm is 0.2. Further, as shown in FIG. 8, it can be seen that there is an inflection point of the radial force pulsation Z when the ratio Wsm / Wm is 0.04.

  (2) In the motor M with 10 poles, 12 slots, and concentrated winding, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 42a and the circumferential width Wsf of the salient pole side slit 42c is (Wsf / Wf) ≦ 0. .15 is set. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is set to 99% or more, which is substantially the maximum (with respect to the case of Wsf / Wf = 0 without the salient pole side slit 42c) ( (See experimental results in FIG. 9).

  Specifically, FIG. 9 shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wsf / Wf is changed by experiment. In this experiment, the ratio Wsm / Wm is 0.035, which is a constant state. As shown in FIG. 9, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.15, the torque T is 99% of the case without the salient pole side slit 42c (when Wsf / Wf = 0). It turns out that it becomes the above. As shown in FIG. 9, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.15, the radial force pulsation Z has no salient pole side slit 42c (Wsf / Wf = 0). It turns out that it becomes smaller. Therefore, in this embodiment, the ratio Wsf / Wf is set to satisfy (Wsf / Wf) ≦ 0.15.

As shown in FIG. 9, it can be seen that there is an inflection point of the radial force pulsation Z when the ratio Wsf / Wf is 0.275.
(Fourth embodiment)
A fourth embodiment embodying the present invention will be described below with reference to FIG. 7B and FIGS. In the fourth embodiment, parts that are substantially the same as those in the second and third embodiments (see FIGS. 4 and 7) are given the same reference numerals, and the detailed description thereof is partially omitted. To do.

  As shown in FIG. 10, the stator 31 in the motor M of the fourth embodiment includes a cylindrical portion 32a and a plurality of teeth 32b extending inward in the radial direction from the cylindrical portion 32a (30 in this example). The stator core 32 having A segment winding 34 as a winding for generating a magnetic field for rotating the rotor 41 is inserted between the teeth 32 b of the stator core 32. The rotor 41 of the fourth embodiment is the same as the rotor 41 of the third embodiment.

  The segment windings 34 of the stator 31 are multiphase (three phases). The segment winding 34 includes a slot insertion portion 35a disposed in the slot so as to penetrate the slot between the teeth 32b in the axial direction (perpendicular to the paper surface), and a slot protrusion (not shown) protruding in the axial direction from the slot. For each phase. The segment conductors 35 for each phase are configured to be electrically connected in the circumferential direction at the slot protrusions. Each segment conductor 35 is formed in a substantially U shape by bending a conductor plate, and a pair of slot insertion portions 35a corresponding to U-shaped parallel straight portions includes three pieces in the circumferential direction. It is arranged in two slots that are separated from each other across the teeth 32b. That is, the stator 31 of the fourth embodiment is of 30 slots and full-pitch winding.

  Here, the ratio Wsm / Wm between the circumferential width Wm of the magnet 43 (see FIG. 7B) and the circumferential width Wsm of the magnet-side slit 42b is set to satisfy (Wsm / Wm) ≦ 0.1. Has been.

Further, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 42a and the circumferential width Wsf of the salient pole side slit 42c is set to satisfy (Wsf / Wf) ≦ 0.15.
Next, characteristic effects (other than those described above) of the fourth embodiment will be described below.

  (1) In the motor M with 10 poles, 30 slots, and full-pitch winding, the ratio Wsm / Wm between the circumferential width Wm of the magnet 43 and the circumferential width Wsm of the magnet side slit 42b is (Wsm / Wm) ≦ 0. 1 is set to satisfy. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is set to approximately 99% or more of the maximum (with respect to the case of Wsm / Wm = 0 without the magnet side slit 42b) (FIG. (See 11 experimental results).

  Specifically, FIG. 11 shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wsm / Wm is changed by experiment. In this experiment, the ratio Wsf / Wf is 0.089, which is a constant state. As shown in FIG. 11, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.1, the torque T is 99% or more of the case where there is no magnet-side slit 42b (when Wsm / Wm = 0). It turns out that it becomes. Further, as shown in FIG. 11, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.1, the radial force pulsation Z has no magnet side slit 42b (when Wsm / Wm = 0). It turns out that it becomes smaller. Therefore, in the present embodiment, the ratio Wsm / Wm is set to satisfy (Wsm / Wm) ≦ 0.1.

As shown in FIG. 11, it can be seen that there is an inflection point of the radial force pulsation Z where the ratio Wsm / Wm is 0.04.
(2) In the motor M with 10 poles, 30 slots, and full-pitch winding, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 42a and the circumferential width Wsf of the salient pole side slit 42c is (Wsf / Wf) ≦ It is set to satisfy 0.15. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is set to 99% or more, which is substantially the maximum (with respect to the case of Wsf / Wf = 0 without the salient pole side slit 42c) ( (See experimental results in FIG. 12).

  Specifically, FIG. 12 shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wsf / Wf is changed by experiment. In this experiment, the ratio Wsm / Wm is 0.035, which is a constant state. As shown in FIG. 12, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.15, the torque T is 99% of the case where there is no salient pole side slit 42c (when Wsf / Wf = 0). It turns out that it becomes the above. As shown in FIG. 12, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.15, the radial force pulsation Z has no salient pole side slit 42c (Wsf / Wf = 0). It turns out that it becomes smaller. Therefore, in this embodiment, the ratio Wsf / Wf is set to satisfy (Wsf / Wf) ≦ 0.15.

  As shown in FIG. 12, it can be seen that there is an inflection point of torque T when the ratio Wsf / Wf is 0.39. Further, as shown in FIG. 12, it can be seen that there is an inflection point of the radial force pulsation Z when the ratio Wsf / Wf is 0.04 and 0.39.

(Fifth embodiment)
A fifth embodiment embodying the present invention will be described below with reference to FIGS. In the fifth embodiment, parts that are substantially the same as those in the second embodiment (see FIGS. 1B and 4) are given the same reference numerals, and a detailed description thereof is partially omitted. To do. The stator 31 of the fifth embodiment is the same as the stator 31 (see FIG. 4) of the second embodiment as shown in FIG.

  As shown in FIG. 13B, the magnet-side slit 23d of the rotor 20 in the motor M of the fifth embodiment is formed so as to be shifted from the circumferential center X1 of the magnet 24 (in the direction orthogonal to the radial direction). Yes. Further, as shown in FIG. 13, the salient pole side slit 23e of the rotor 20 in the motor M of the fifth embodiment is formed from the circumferential center X2 between the magnets 24 adjacent in the circumferential direction (in the orthogonal direction of the radial direction). ) It is shifted.

  Here, the ratio Wzm / Wm between the circumferential width Wm of the magnet 24 and the displacement width Wzm from the circumferential center X1 of the magnet 24 in the rotational direction of the magnet-side slit 23d is -0.45 <(Wzm / Wm). It is set to satisfy <0. Note that “− (minus)” is shifted in the counter-rotation direction (clockwise direction in FIG. 13B) in the rotor 20 for rotation in one direction (counterclockwise direction in FIG. 13B). Means that.

  The ratio Wzf / Wf between the circumferential width Wf of the salient pole 23a and the deviation width Wzf from the circumferential center X2 between the magnets 24 adjacent in the circumferential direction to the rotational direction of the salient pole side slit 23e is −0. It is set to satisfy 42 <(Wzf / Wf) <0.

Next, characteristic effects (other than those described above) of the fifth embodiment will be described below.
(1) In the 8-pole, 24-slot, full-pitch motor M, the ratio Wzm between the circumferential width Wm of the magnet 24 and the deviation width Wzm from the circumferential center X1 of the magnet 24 in the rotational direction of the magnet-side slit 23d. / Wm is set so as to satisfy −0.45 <(Wzm / Wm) <0. Therefore, the torque T can be made larger than 100% (as compared to the case of Wzm / Wm = 0 in which the magnet side slit 23d is formed at the circumferential center X1 of the magnet 24) (see the experimental result in FIG. 14A). ). Further, the cogging torque C can be made smaller than 100% (as compared to the case of Wzm / Wm = 0 in which the magnet side slit 23d is formed at the circumferential center X1 of the magnet 24) (experimental result of FIG. 14B). reference).

  Specifically, FIG. 14A shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wzm / Wm is changed by experiment. FIG. 14B shows the cogging torque (ratio) C and torque (ratio) T when the ratio Wzm / Wm is changed by experiment. In these experiments, the ratio Wsm / Wm is 0.04 and constant, and the ratio Wsf / Wf is 0.044 and constant. As shown in FIG. 14A, when the ratio Wzm / Wm satisfies −0.45 <(Wzm / Wm) <0, the torque T is such that the magnet side slit 23d is at the circumferential center X1 of the magnet 24. It can be seen that it is larger than the case (Wzm / Wm = 0). 14B, when the ratio Wzm / Wm satisfies −0.45 <(Wzm / Wm) <0, the cogging torque C is the center of the magnet 24 in the circumferential direction of the magnet side slit 23d. It can be seen that it is smaller than the case of X1 (when Wzm / Wm = 0). Therefore, in the present embodiment, the ratio Wzm / Wm is set so as to satisfy −0.45 <(Wzm / Wm) <0.

  In addition, as shown to Fig.14 (a), when the said ratio Wzm / Wm is -0.1, it turns out that the torque T becomes the maximum value. Further, as shown in FIG. 14A, it can be seen that there is an inflection point of the radial force pulsation Z where the ratio Wzm / Wm is −0.25 and 0.1.

  (2) In the 8-pole, 24-slot, full-pitch motor M, the circumferential width Wf of the salient pole 23a and the circumferential center X2 between the magnets 24 adjacent in the circumferential direction in the rotational direction of the salient pole-side slit 23e. The ratio Wzf / Wf to the deviation width Wzf is set so as to satisfy −0.42 <(Wzf / Wf) <0. Therefore, the torque T can be made larger than 100% (as compared to the case of Wzf / Wf = 0 in which the salient pole side slit 23e is formed at the circumferential center X2 between the magnets 24 adjacent in the circumferential direction) (FIG. 15). (See experimental results in (a)).

  Specifically, FIG. 15A shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wzf / Wf is changed by experiment. FIG. 15B shows cogging torque (ratio) C and torque (ratio) T when the ratio Wzf / Wf is changed by experiment. In these experiments, the ratio Wsm / Wm is 0.04 and constant, and the ratio Wsf / Wf is 0.044 and constant. As shown in FIG. 15A, when the ratio Wzf / Wf satisfies −0.42 <(Wzf / Wf) <0, the torque T is between the magnets 24 where the salient pole side slits 23e are adjacent in the circumferential direction. It can be seen that it is larger than that at the circumferential center X2 (when Wzf / Wf = 0).

As shown in FIG. 15B, it can be seen that there is an inflection point of the cogging torque C where the ratio Wsf / Wf is −0.04.
(Sixth embodiment)
A sixth embodiment embodying the present invention will be described below with reference to FIGS. In the sixth embodiment, parts that are substantially the same as those in the fourth embodiment (see FIGS. 7B and 10) are given the same reference numerals, and the detailed description thereof is partially omitted. To do. The stator 31 of the sixth embodiment is the same as the stator 31 (see FIG. 10) of the fourth embodiment as shown in FIG.

  As shown in FIG. 16B, the magnet-side slit 42b of the rotor 41 in the motor M of the sixth embodiment is formed so as to be shifted from the circumferential center X1 of the magnet 43 (in the direction perpendicular to the radial direction). Yes. As shown in FIG. 16B, the salient pole side slit 42c of the rotor 41 in the motor M of the sixth embodiment is separated from the circumferential center X2 between the magnets 43 adjacent in the circumferential direction (in the radial direction). They are offset (in the orthogonal direction).

  Here, the ratio Wzm / Wm between the circumferential width Wm of the magnet 43 and the displacement width Wzm from the circumferential center X1 of the magnet 43 in the rotational direction of the magnet side slit 42b is -0.32 ≦ (Wzm / Wm). It is set to satisfy ≦ 0.3 (except for Wzm / Wm = 0).

  The ratio Wzf / Wf between the circumferential width Wf of the salient pole 42a and the deviation width Wzf in the rotational direction of the salient pole side slit 42c from the circumferential center X2 between the magnets 43 adjacent in the circumferential direction is −0. It is set so as to satisfy 15 ≦ (Wzf / Wf) ≦ 0.11 (except for Wzf / Wf = 0).

Next, characteristic effects (other than those described above) of the fifth embodiment will be described below.
(1) In the motor M with 10 poles, 30 slots, and full-pitch winding, the ratio Wzm between the circumferential width Wm of the magnet 43 and the displacement width Wzm from the circumferential center X1 of the magnet 43 in the rotational direction of the magnet side slit 42b. / Wm is set so as to satisfy −0.32 ≦ (Wzm / Wm) ≦ 0.3 (except for Wzm / Wm = 0). Therefore, the torque T can be set to approximately 99% or more (as compared to the case of Wzm / Wm = 0 in which the magnet side slit 42b is formed at the circumferential center X1 of the magnet 43) (see FIG. 17A). See experimental results). Further, the radial force pulsation Z or the cogging torque C can be made smaller than 100% (as compared to the case of Wzm / Wm = 0 in which the magnet side slit 42b is formed at the circumferential center X1 of the magnet 43) (FIG. 17). (See experimental results in (a) and (b)).

  Specifically, FIG. 17A shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wzm / Wm is changed by experiment. FIG. 17B shows the cogging torque (ratio) C and torque (ratio) T when the ratio Wzm / Wm is changed by experiment. In these experiments, the ratio Wsm / Wm is 0.035, which is a constant state, and the ratio Wsf / Wf is 0.089, which is a constant state. As shown in FIG. 17A, when the ratio Wzm / Wm satisfies −0.32 ≦ (Wzm / Wm) ≦ 0.3 (except for Wzm / Wm = 0), the torque T is a magnet. It can be seen that it is 99% or more of the case where the side slit 42b is at the circumferential center X1 of the magnet 43 (when Wzm / Wm = 0). Further, as shown in FIGS. 17A and 17B, the ratio Wzm / Wm satisfies −0.32 ≦ (Wzm / Wm) ≦ 0.3 (except for Wzm / Wm = 0). In this case, the radial force pulsation Z or the cogging torque C is smaller than when the magnet-side slit 42b is at the circumferential center X1 of the magnet 43 (when Wzm / Wm = 0). Therefore, in the present embodiment, the ratio Wzm / Wm is set so as to satisfy −0.32 ≦ (Wzm / Wm) ≦ 0.3 (except for Wzm / Wm = 0).

As shown in FIG. 17A, it can be seen that there is an inflection point of the radial force pulsation Z where the ratio Wzm / Wm is −0.1.
(2) In the motor M with 10 poles, 30 slots, and full-pitch winding, the circumferential width Wf of the salient pole 42a and the center X2 between the circumferentially adjacent magnets 43 in the rotational direction of the salient pole side slit 42c. The ratio Wzf / Wf to the deviation width Wzf is set so as to satisfy −0.15 ≦ (Wzf / Wf) ≦ 0.11 (except for Wzf / Wf = 0). Therefore, the torque T can be substantially 99% or more (relative to the case of Wzf / Wf = 0 in which the salient pole side slit 42c is formed at the circumferential center X2 between the magnets 43 adjacent in the circumferential direction). (Refer to the experimental results in FIG. 18 (a)).

  Specifically, FIG. 18A shows the radial force pulsation (ratio) Z and torque (ratio) T when the ratio Wzf / Wf is changed by experiment. FIG. 18B shows the cogging torque (ratio) C and the torque (ratio) T when the ratio Wzf / Wf is changed by experiment. In these experiments, the ratio Wsm / Wm is 0.035, which is a constant state, and the ratio Wsf / Wf is 0.089, which is a constant state. As shown in FIG. 18A, when the ratio Wzf / Wf satisfies −0.15 ≦ (Wzf / Wf) ≦ 0.11 (except for Wzf / Wf = 0), the torque T is sudden. It can be seen that it is 99% or more of the case where the pole-side slit 42c is at the circumferential center X2 between the magnets 43 adjacent in the circumferential direction (when Wzf / Wf = 0).

  As shown in FIG. 18A, it can be seen that there is an inflection point of radial force pulsation Z where the ratio Wsf / Wf is -0.04. Further, as shown in FIG. 18B, it can be seen that there is an inflection point of the cogging torque C when the ratio Wsf / Wf is −0.05.

(Seventh embodiment)
A seventh embodiment embodying the present invention will be described below with reference to FIGS. Note that in the seventh embodiment, portions that are substantially the same as those in the second embodiment (see FIG. 4) are denoted by the same reference numerals, and a detailed description thereof is partially omitted.

  As shown in FIG. 19A, the stator M in the motor M of the seventh embodiment includes a cylindrical portion 32a and a plurality (60 in this example) in the circumferential direction extending radially inward from the cylindrical portion 32a. And a stator core 32 having teeth 32b. A segment winding 34 as a winding for generating a magnetic field for rotating the rotor 51 is inserted between the teeth 32 b of the stator core 32.

  The segment windings 34 of the stator 31 are multiphase (three phases). The segment winding 34 includes a slot insertion portion 35a disposed in the slot so as to penetrate the slot between the teeth 32b in the axial direction (perpendicular to the paper surface), and a slot protrusion (not shown) protruding in the axial direction from the slot. For each phase. The segment conductors 35 for each phase are configured to be electrically connected in the circumferential direction at the slot protrusions. Each segment conductor 35 is formed in a substantially U shape by bending a conductor plate, and a pair of slot insertion portions 35a corresponding to a U-shaped parallel straight line portion includes six pieces in the circumferential direction. It is arranged in two slots that are separated from each other across the teeth 32b. In other words, the stator 31 of the seventh embodiment is a 60-slot, full-pitch winding and distributed winding.

  Further, the rotor 51 in the motor M of the seventh embodiment is for both rotations, and as shown in FIGS. 19 (a) and 19 (b), an annular non-circular surface is provided on the outer peripheral surface of the rotating shaft 21. A substantially annular rotor core 52 is fitted around the magnetic member 22. Five N-pole magnets 53 are arranged on the outer peripheral surface of the rotor core 52 in the circumferential direction of the outer peripheral portion of the rotor core 52 (at intervals of 72 °). The magnet 53 fixed to the outer peripheral surface of the rotor core 52 of the present embodiment is formed in a substantially rectangular parallelepiped shape in which the surface facing the stator 31 (the teeth 32 b) is an arc convex shape, and is viewed from the axial direction of the rotor 51. The longitudinal direction is arranged along the orthogonal direction of the radial direction. In addition, salient poles 52 a formed on the outer peripheral portion of the rotor core 52 are disposed between the magnets 53 with a gap K therebetween. The gaps K are formed on both sides of the magnet 53 in the circumferential direction, and are each formed with a constant width and area in the circumferential direction when viewed from the axial direction. That is, the magnets 53 and the salient poles 52a are alternately arranged at equiangular (36 °) intervals, and the rotor 51 has 10 poles (10 poles) that cause the salient poles 52a to function as S poles with respect to the N pole magnets 53. The so-called continuous pole type.

  Further, as shown in FIG. 19B, on the radially inner side of the magnet 53 in the rotor core 52, the magnet 53 is used as a radially outer end (from the magnet 53) to the radially inner end of the rotor core 52 (diameter). A magnet-side slit 52b extending in the radial direction (so as to open inward in the direction) is formed. Further, a salient pole side slit 52c extending in the radial direction to the radially inner end of the rotor core 52 (so as to open radially inward) is formed inside the salient pole 52a in the rotor core 52.

Here, the ratio Wsm / Wm between the circumferential width Wm of the magnet 53 and the circumferential width Wsm of the magnet-side slit 52b is set to satisfy (Wsm / Wm) ≦ 0.1.
Further, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 52a and the circumferential width Wsf of the salient pole side slit 52c is set to satisfy (Wsf / Wf) ≦ 0.3.

Next, characteristic effects (other than those described above) of the seventh embodiment will be described below.
(1) In the motor M with 10 poles, 60 slots, and distributed winding, the ratio Wsm / Wm between the circumferential width Wm of the magnet 53 and the circumferential width Wsm of the magnet side slit 52b is (Wsm / Wm) ≦ 0.1. It is set to satisfy. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is set to approximately 99% or more of the maximum (with respect to the case of Wsm / Wm = 0 without the magnet side slit 52b) (FIG. 20 and the experimental result of FIG. 21).

  Specifically, FIG. 20 shows the torque (ratio) T when the ratio Wsm / Wm is changed by experiment. FIG. 21 shows the radial force pulsation (ratio) Z when the ratio Wsm / Wm is changed by experiment. In this experiment, the ratio Wsf / Wf is 0.15 and constant. As shown in FIG. 20, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.1, the torque T is 99% or more of the case where there is no magnet side slit 52b (when Wsm / Wm = 0). It turns out that it becomes. Further, as shown in FIG. 21, when the ratio Wsm / Wm satisfies (Wsm / Wm) ≦ 0.1, the radial force pulsation Z has no magnet side slit 52b (when Wsm / Wm = 0). It turns out that it becomes smaller. Therefore, in the present embodiment, the ratio Wsm / Wm is set to satisfy (Wsm / Wm) ≦ 0.1.

As shown in FIG. 21, it can be seen that there is an inflection point of the radial force pulsation Z where the ratio Wsm / Wm is 0.08.
(2) In a 10 pole, 60 slot, distributed winding motor, the ratio Wsf / Wf between the circumferential width Wf of the salient pole 52a and the circumferential width Wsf of the salient pole side slit 52c is (Wsf / Wf) ≦ 0. 3 is set. Therefore, the radial force pulsation Z can be reduced and the vibration can be reduced while the torque T is set to 99% or more, which is substantially the maximum (with respect to the case of Wsf / Wf = 0 without the salient pole side slit 52c) ( (See the experimental results in FIGS. 22 and 23).

  Specifically, FIG. 22 shows the torque (ratio) T when the ratio Wsf / Wf is changed by experiment. FIG. 23 shows the radial force pulsation (ratio) Z when the ratio Wsf / Wf is changed by experiment. In this experiment, the ratio Wsm / Wm is 0.15, which is a constant state. As shown in FIG. 22, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.3, the torque T is 99% of the case without the salient pole side slit 52c (when Wsf / Wf = 0). It turns out that it becomes the above. Further, as shown in FIG. 23, when the ratio Wsf / Wf satisfies (Wsf / Wf) ≦ 0.3, the radial force pulsation Z has no salient pole side slit 52c (when Wsf / Wf = 0). It turns out that it becomes smaller. Therefore, in the present embodiment, the ratio Wsf / Wf is set to satisfy (Wsf / Wf) ≦ 0.3.

As shown in FIG. 23, it can be seen that there is an inflection point of the radial force pulsation Z when the ratio Wsf / Wf is 0.27.
The experimental results in this embodiment (see FIGS. 20 to 23) are the same as the experimental results in the 8-pole and 48-slot motors and the 12-pole and 72-slot motors. The same effect can be obtained by setting the ratios Wsm / Wm and Wsf / Wf in the same manner in the slot motor and the 12-pole / 72-slot motor.

  That is, (2 × N) pole rotors with N (where N ≧ 4) magnets are arranged, and (12 × N) teeth are provided and windings are wound in distributed winding (12 × N) In a motor having a slot stator, if the ratio Wsm / Wm is set to satisfy (Wsm / Wm) ≦ 0.1, the same effect as the effect (1) of the seventh embodiment can be obtained. Can be obtained.

  In addition, (2 × N) pole rotors with N (where N ≧ 4) magnets are arranged, and (12 × N) teeth are provided, and windings are wound in distributed winding (12 × N) In a motor having a slot stator, if the ratio Wsf / Wf is set so as to satisfy (Wsf / Wf) ≦ 0.3, the same effect as the effect (2) of the seventh embodiment can be obtained. Can be obtained.

(Eighth embodiment)
Hereinafter, an eighth embodiment of the present invention will be described with reference to FIGS. Note that in the eighth embodiment, parts that are substantially the same as in the first embodiment (see FIG. 1) are given the same reference numerals, and detailed descriptions thereof are partially omitted.

  The rotor core 23 of the rotor 20 (see FIG. 25B) in the motor M of the eighth embodiment is formed by laminating a rotor core plate 61 (see FIG. 24) in a spiral shape. Although the rotor core 23 of the first embodiment is not particularly mentioned, for example, a large number of substantially circular rotor core plates are punched from a steel plate, and these are simply laminated.

  Specifically, as shown in FIG. 24, the rotor core plate 61 in this example has a shape obtained by dividing the rotor core 23 (see FIG. 1) by the magnet side slit 23d and the salient pole side slit 23e when viewed from the axial direction. A large number of blocks B are developed on the boundary of the magnet-side slits 23d and the salient pole-side slits 23e, and are continuously arranged on a substantially straight line. In FIG. 24 and FIG. 25A, for convenience, the same reference numerals are used for portions corresponding to the respective portions (magnet side slit 23d, salient pole side slit 23e, etc.) of the rotor core 23 of the first embodiment. Is attached. The rotor 20 (rotor core 23) in this example is formed by spirally laminating rotor core plates 61 (the block B) as shown in FIGS. 25 (a) and 25 (b).

That is, the method for manufacturing the rotor 20 (rotor core 23) includes a “punching step” and a “spiral lamination step”.
First, in the “punching step”, as shown in FIG. 24, the block B having a shape obtained by dividing the rotor core 23 by the magnet side slit 23d and the salient pole side slit 23e when viewed from the axial direction is formed into the magnet side slit 23d and salient pole. The rotor core plate 61 is formed by punching from the steel plate, which is developed with the side slits 23e as a boundary and arranged in a large number on a substantially straight line.

  Next, in the “spiral lamination step”, as shown in FIGS. 25A and 25B, the rotor core plate 61 (block B) is helically laminated to obtain the rotor core 23. Further, in the “spiral lamination process” of this example, when the block B developed with the magnet side slit 23d as a boundary is closed, the magnet 24 embedded in the rotor core 23 is arranged in advance (FIG. 25 (a)). )), The block B (rotor core 23) and the magnet 24 are brought into close contact with each other in the radial direction.

Next, characteristic effects (other than those described above) of the configuration and method of the eighth embodiment will be described below.
(1) For example, as compared with the case where a substantially circular rotor core plate material that becomes the rotor core 23 is simply punched from a steel plate, the waste of the steel plate during the “punching process” of punching the rotor core plate material 61 is reduced. Yield can be improved. That is, when a substantially circular rotor core plate is simply punched out, steel plates are likely to be wasted at the four corners, etc., but a large number of blocks B are arranged in a substantially straight line as in the above configuration and method. If the shaped rotor core plate 61 is punched substantially linearly, the waste of the steel plate can be reduced. In addition, when closing the block B developed with the magnet-side slit 23d as a boundary in the “spiral stacking step” in which the block B is spirally stacked, the magnet 24 embedded in the rotor core 23 is arranged in advance, The block B (rotor core 23) and the magnet 24 can be brought into close contact with each other in the radial direction. As a result, the radial air gap between the rotor core 23 and the magnet 24 embedded in the rotor core 23 can be easily reduced, and the efficiency of the motor M can be improved.

The above embodiment may be modified as follows.
In the rotor core 23 of the eighth embodiment, the rotor core plate 61 is simply laminated in a spiral shape, but as shown in FIGS. 26 (a) to 26 (e), in the portion corresponding to the magnet side slit 23d, You may provide the fitting convex part 71a-75a and the fitting recessed part 71b-75b for engaging mutually and maintaining the state laminated | stacked helically. In addition, the fitting convex part 71a shown to Fig.26 (a) is formed in the trapezoid shape where a width | variety is so wide as the front-end | tip, and the fitting recessed part 71b is made into the shape which the fitting convex part 71a can fit. Moreover, the fitting convex part 72a shown in FIG.26 (b) is formed in the substantially elliptical shape at the front-end | tip, and the fitting recessed part 72b is made into the shape which the fitting convex part 72a can fit. In addition, the fitting convex portion 73a shown in FIG. 26 (c) has a trapezoidal shape that is wider at the tip, and the corner on the radially inner side of the tip is formed at a right angle, and the fitting concave portion 73b is the fitting convex portion. 73a can be fitted. In addition, the fitting convex portion 74a shown in FIG. 26 (d) has a bent portion that is bent at a right angle radially outward at the tip, and the fitting concave portion 74b has a shape that allows the fitting convex portion 74a to be fitted. Has been. In addition, the fitting convex portion 75a shown in FIG. 26 (e) has a curved portion curved radially outward at the tip, and the fitting concave portion 75b has a shape into which the fitting convex portion 75a can be fitted. Yes. If it does in this way, rotor core 23 (plate material 61 for rotor cores) will be maintained firmly in the state where it was laminated in the shape of a spiral.

  In the first to fourth embodiments, the rotors 20 and 41 for one-way rotation are used. However, the present invention is not limited to this and may be for both rotations. For example, like the rotor 20 shown in FIG. 27, the gap K in the rotor core 23 of the rotor 20 of the first embodiment is the same on both sides in the circumferential direction of the magnet 24 (the circumferential width and the area is constant). It is good also as what was formed in. Even if it does in this way, if the said ratio Wsm / Wm and Wsf / Wf are set similarly to the said 1st-4th embodiment, it turns out by the experimental result that the same effect will be acquired.

  The number of teeth 11a, 32b and the number of magnets 24, 43, 53 (saliency poles 23a, 42a, 52a) in each of the above embodiments is a motor in which magnet side slits or salient pole side slits are formed. The number of motors may be changed.

  DESCRIPTION OF SYMBOLS 10,31 ... Stator, 11a, 32b ... Teeth, 12 ... Winding, 20, 41, 51 ... Rotor, 22 ... Nonmagnetic member, 23, 42, 52 ... Rotor core, 23a, 42a, 52a ... Salient pole, 23d, 42b, 52b ... magnet side slit, 23e, 42c, 52c ... salient pole side slit, 24, 43, 53 ... magnet, 34 ... segment winding (winding), 61 ... rotor core plate, B ... block, K ... gap , X1, X2 ... circumferential center.

Claims (17)

A plurality of magnets of one magnetic pole are arranged in the circumferential direction of the outer peripheral portion of the rotor core, and salient poles provided on the rotor core are arranged with gaps between the magnets so that the salient pole functions as the other magnetic pole. A configured rotor,
On the radially inner side of the magnet in the rotor core, a magnet-side slit extending in the radial direction to the radially inner end of the rotor core is formed using the magnet as a radially outer end,
On the radially inner side of the salient pole in the rotor core, a salient pole-side slit extending in the radial direction to the radially inner end of the rotor core is formed,
A nonmagnetic member is provided on the radially inner side of the rotor core to connect the radially inner ends of the rotor core separated in the circumferential direction by the magnet side slit and the salient pole side slit. Rotor to do. The rotor according to claim 1 is an 8-pole rotor in which four magnets are arranged in a circumferential direction of the rotor core, and the rotor,
A motor including 12 teeth extending in the circumferential direction in the circumferential direction, and a 12-slot stator in which windings are wound around the teeth in a concentrated manner,
The ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is:
(Wsm / Wm) ≦ 0.1
A motor characterized by being set to satisfy. The rotor according to claim 1 is an 8-pole rotor in which four magnets are arranged in a circumferential direction of the rotor core, and the rotor,
A motor including 12 teeth extending in the circumferential direction in the circumferential direction, and a 12-slot stator in which windings are wound around the teeth in a concentrated manner,
The ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is:
(Wsf / Wf) ≦ 0.2
A motor characterized by being set to satisfy. The rotor according to claim 1 is an 8-pole rotor in which four magnets are arranged in a circumferential direction of the rotor core, and the rotor,
A motor comprising 24 teeth extending in the circumferential direction in the circumferential direction, and a 24-slot stator in which the winding is wound around the teeth in a full-pitch manner,
The ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is:
(Wsm / Wm) ≦ 0.085
A motor characterized by being set to satisfy. The rotor according to claim 1 is an 8-pole rotor in which four magnets are arranged in a circumferential direction of the rotor core, and the rotor,
A motor comprising 24 teeth extending in the circumferential direction in the circumferential direction, and a 24-slot stator in which the winding is wound around the teeth in a full-pitch manner,
The ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is:
(Wsf / Wf) ≦ 0.18
A motor characterized by being set to satisfy. The rotor according to claim 1 is a 10-pole rotor in which five magnets are arranged in a circumferential direction of the rotor core, and the rotor;
A motor including 12 teeth extending in the circumferential direction in the circumferential direction, and a 12-slot stator in which windings are wound around the teeth in a concentrated manner,
The ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is:
(Wsm / Wm) ≦ 0.12
A motor characterized by being set to satisfy. The rotor according to claim 1 is a 10-pole rotor in which five magnets are arranged in a circumferential direction of the rotor core, and the rotor;
A motor including 12 teeth extending in the circumferential direction in the circumferential direction, and a 12-slot stator in which windings are wound around the teeth in a concentrated manner,
The ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is:
(Wsf / Wf) ≦ 0.15
A motor characterized by being set to satisfy. The rotor according to claim 1 is a 10-pole rotor in which five magnets are arranged in a circumferential direction of the rotor core, and the rotor;
A motor comprising 30 teeth extending in the circumferential direction in the circumferential direction, and a 30-slot stator in which windings are wound around the teeth in a full-pitch manner,
The ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is:
(Wsm / Wm) ≦ 0.1
A motor characterized by being set to satisfy. The rotor according to claim 1 is a 10-pole rotor in which five magnets are arranged in a circumferential direction of the rotor core, and the rotor;
A motor comprising 30 teeth extending in the circumferential direction in the circumferential direction, and a 30-slot stator in which windings are wound around the teeth in a full-pitch manner,
The ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is:
(Wsf / Wf) ≦ 0.15
A motor characterized by being set to satisfy. The rotor according to claim 1 is an 8-pole rotor in which four magnets are arranged in a circumferential direction of the rotor core, and the rotor,
A motor comprising 24 teeth extending in the circumferential direction in the circumferential direction, and a 24-slot stator in which the winding is wound around the teeth in a full-pitch manner,
The ratio Wzm / Wm between the circumferential width Wm of the magnet and the deviation width Wzm from the circumferential center of the magnet in the rotation direction of the magnet-side slit,
−0.45 <(Wzm / Wm) <0
A motor characterized by being set to satisfy. The rotor according to claim 1 is an 8-pole rotor in which four magnets are arranged in a circumferential direction of the rotor core, and the rotor,
A motor comprising 24 teeth extending in the circumferential direction in the circumferential direction, and a 24-slot stator in which the winding is wound around the teeth in a full-pitch manner,
The ratio Wzf / Wf between the circumferential width Wf of the salient pole and the deviation width Wzf in the rotational direction of the salient pole side slit from the circumferential center between the magnets adjacent in the circumferential direction is:
−0.42 <(Wzf / Wf) <0
A motor characterized by being set to satisfy. The rotor according to claim 1 is a 10-pole rotor in which five magnets are arranged in a circumferential direction of the rotor core, and the rotor;
A motor comprising 30 teeth extending in the circumferential direction in the circumferential direction, and a 30-slot stator in which windings are wound around the teeth in a full-pitch manner,
The ratio Wzm / Wm between the circumferential width Wm of the magnet and the deviation width Wzm from the circumferential center of the magnet in the rotation direction of the magnet-side slit,
−0.32 ≦ (Wzm / Wm) ≦ 0.3 (except for Wzm / Wm = 0)
A motor characterized by being set to satisfy. The rotor according to claim 1 is a 10-pole rotor in which five magnets are arranged in a circumferential direction of the rotor core, and the rotor;
A motor comprising 30 teeth extending in the circumferential direction in the circumferential direction, and a 30-slot stator in which windings are wound around the teeth in a full-pitch manner,
The ratio Wzf / Wf between the circumferential width Wf of the salient pole and the deviation width Wzf in the rotational direction of the salient pole side slit from the circumferential center between the magnets adjacent in the circumferential direction is:
−0.15 ≦ (Wzf / Wf) ≦ 0.11 (except for Wzf / Wf = 0)
A motor characterized by being set to satisfy. The rotor according to claim 1 is a (2 × N) pole rotor in which N (where N ≧ 4) magnets are arranged in the circumferential direction of the rotor core,
(12 × N) teeth extending in the circumferential direction are provided in the circumferential direction, and the stator includes a (12 × N) slot stator in which windings are wound in a distributed winding around the teeth,
The ratio Wsm / Wm between the circumferential width Wm of the magnet and the circumferential width Wsm of the magnet side slit is:
(Wsm / Wm) ≦ 0.1
A motor characterized by being set to satisfy. The rotor according to claim 1 is a (2 × N) -pole rotor in which N (however, ≧ 4) magnets are arranged in the circumferential direction of the rotor core,
(12 × N) teeth extending in the circumferential direction are provided in the circumferential direction, and the stator includes a (12 × N) slot stator in which windings are wound in a distributed winding around the teeth,
The ratio Wsf / Wf between the circumferential width Wf of the salient pole and the circumferential width Wsf of the salient pole side slit is:
(Wsf / Wf) ≦ 0.3
A motor characterized by being set to satisfy. The rotor according to claim 1, wherein
The rotor core has a shape in which the rotor core is divided by the magnet-side slit and the salient pole-side slit when viewed from the axial direction, and is expanded substantially on a straight line with the magnet-side slit and the salient pole-side slit as a boundary. A rotor characterized in that a large number of rotor core plates that can be arranged in succession are laminated spirally. It is a manufacturing method of the rotor according to claim 1, Comprising:
When viewed from the axial direction, the rotor core is divided by the magnet side slits and the salient pole side slits so that a large number of blocks are developed on the boundary of the magnet side slits and the salient pole side slits. Punching process obtained by punching the rotor core plate material of the arranged shape from the steel plate;
A method of manufacturing a rotor, comprising: a spiral laminating step of spirally laminating the rotor core plate material to obtain the rotor core.

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