JP6227377B2 - motor - Google Patents

Description

  The present invention relates to a motor.

  The rotor used in the motor has a rotor core that has a plurality of claw-shaped magnetic poles in the circumferential direction and is combined, and field magnets are arranged between them to function each claw-shaped magnetic pole as a different magnetic pole alternately There is a so-called permanent magnet field rundel-type rotor (see, for example, Patent Document 1). In such a Landell-type rotor, when changing the number of poles, it is possible to easily cope with the change in the number of poles by changing the number of claw-shaped magnetic poles while making the field magnet the same structure. It has become.

Japanese Utility Model Publication No. 5-43749

  By the way, in a motor employing the above-described rotor, if the number of stator poles (number of slots) is changed as the number of rotor poles changes, for example, not only the shape of the stator core (number of teeth, etc.) but also the coil It is necessary to change the winding mode and the like. Therefore, it is conceivable that the stator is also of a Landell type structure with respect to the rotor of the Landel type structure.

  However, when both the rotor and stator have a Landel structure, it is clarified how the shape of the rotor core or stator core (particularly the shape of the claw-shaped magnetic poles) affects the motor performance (torque and output). Not. In addition, it is desired that the motor performance be varied even under the condition that the power supply to the stator is the same.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a motor capable of varying motor performance even when the power supply to the stator is the same.

A motor for solving the above problems includes a first rotor core having a plurality of first claw-shaped magnetic poles protruding in the axial direction, a second rotor core having a plurality of second claw-shaped magnetic poles protruding in the axial direction, A field magnet disposed between the axial directions of the second rotor core, wherein the first and second claw-shaped magnetic poles are alternately disposed in the circumferential direction, and the first and second claw-shaped magnetic poles are arranged by the field magnet. , A first stator core having a plurality of first claw-shaped magnetic poles protruding in the axial direction, a second stator core having a plurality of second claw-shaped magnetic poles protruding in the axial direction, Coil portions disposed between the stator cores and wound in the circumferential direction, and first and second claw-shaped magnetic poles on the stator side are alternately arranged in the circumferential direction, and the first and second claw-shaped on the rotor side Based on energization to the coil part A motor having a configuration the stator such that the polarity is switched in the first and second claw-shaped magnetic poles different from each other poles of the stator side have, the claw-shaped magnetic poles of the rotor side, of the distal portion The circumferential center has a shape shifted in the counter-rotating direction of the rotor with respect to the circumferential center of the proximal end portion, and each claw-shaped magnetic pole on the stator side has the circumferential center of the distal end portion at the proximal end. The shape is shifted in the rotational direction of the rotor with respect to the center in the circumferential direction of the portion .

According to this configuration, since each claw-like magnetic poles of the claw-shaped magnetic poles and the stator side of the rotor side is asymmetric when viewed in the radial direction, it is possible to vary the reluctance torque by its shape, as a result, the stator The motor performance (torque and output) can be made different even if the power supply to the motor is the same.

Further , by configuring the tip side of each claw-shaped magnetic pole on the stator side to be shifted in the rotation direction of the rotor, the torque and output can be improved regardless of the shape of the claw-shaped magnetic pole on the rotor side (FIG. 13 (a)). ) (B)).

In addition , the torque and the output can be further improved by configuring the tip side of each claw-shaped magnetic pole on the rotor side to be shifted in the counter-rotating direction of the rotor (see FIGS. 13A and 13B).

A motor that solves the above problems includes a first rotor core having a plurality of first rotor side claw-shaped magnetic poles protruding in the axial direction, a second rotor core having a plurality of second rotor side claw-shaped magnetic poles protruding in the axial direction, Field magnets disposed between the first and second rotor cores in the axial direction, and the first and second rotor side claw-shaped magnetic poles are alternately disposed in the circumferential direction, and the field magnets are used for the first. And a rotor configured with the second rotor side claw-shaped magnetic poles different from each other, a first stator core having a plurality of first stator side claw-shaped magnetic poles protruding in the axial direction, and a plurality of second stator sides protruding in the axial direction A second stator core having claw-shaped magnetic poles and a coil portion disposed between the stator cores and wound in the circumferential direction, wherein the first and second stator side claw-shaped magnetic poles are alternately arranged in the circumferential direction; The first and second b And a stator configured to switch the polarity of the first and second stator side claw-shaped magnetic poles with different magnetic poles based on energization to the coil portion. The first and second rotor cores have a plurality of extending portions that extend in a radial direction from a base portion that sandwiches the field magnet in the axial direction, and a radial tip portion of each extending portion of the first rotor core. The first rotor-side claw-shaped magnetic pole is provided on the first rotor-side claw-shaped magnetic pole, and the second rotor-side claw-shaped magnetic pole is provided at the distal end in the radial direction of each extending portion of the second rotor core. A plurality of extending portions extending in a radial direction from the first stator core, the first stator side claw-shaped magnetic poles being provided at the radially leading ends of the extending portions of the first stator core, and the extending portions of the second stator core. The second stator side claw-like shape at the radial tip Pole is provided, each extending portion of the rotor side is in a form shifted in the counter-rotational direction of the rotor with respect to the circumferential center of the circumferential center radially proximal end portion of the radial tip And each extension part by the side of the above-mentioned stator has constituted the shape where the circumference direction center of the diameter direction tip part shifted in the rotation direction of the rotor with respect to the circumference direction center of the diameter direction base end part .

According to this configuration, since the extended portion of the rotor and the stator has an asymmetric shape in the circumferential direction, the reluctance torque can be varied depending on the shape, and as a result, the motor performance is maintained even when the power supply to the stator is the same. (Torque and output) can be made different.

  According to this configuration, it is possible to improve the torque and the output regardless of the shape of the extension portion on the stator side by configuring the tip side of each extension portion on the rotor side to be shifted in the counter-rotating direction of the rotor. (See FIGS. 18A and 18B).

  According to this configuration, the torque and the output can be further improved by configuring the leading end side of each extending portion on the stator side to be shifted in the rotation direction of the rotor (see FIGS. 18A and 18B). ).

  According to the motor of the present invention, the motor performance can be varied even if the power supply to the stator is the same.

It is a perspective view of the brushless motor of an embodiment. It is a perspective view of the rotor of the same form. (A) is a top view which shows a 1st rotor core partially, (b) is a side view which shows a 1st rotor side claw-shaped magnetic pole. It is a disassembled perspective view of a rotor unit. It is a cross-sectional perspective view of the stator of the same form. It is a disassembled perspective view of a stator unit. It is a schematic diagram which expand | deploys and shows the 1st and 2nd rotor side claw-shaped magnetic pole. It is a schematic diagram which expand | deploys and shows the 1st and 2nd stator side claw-shaped magnetic pole. (A) It is a graph which shows the comparison with the torque in the same form, and the torque in a conventional structure, (b) is a graph which shows the comparison with the output in the same form, and the output in a conventional structure. It is a schematic diagram which expand | deploys and shows the 1st and 2nd rotor side claw-shaped magnetic pole of another example. It is a schematic diagram which expand | deploys and shows the 1st and 2nd rotor side claw-shaped magnetic pole of another example. It is a schematic diagram which expand | deploys and shows the 1st and 2nd rotor side claw-shaped magnetic pole of another example. (A) It is a graph which shows the torque in the various patterns from which the shape of a claw-shaped magnetic pole differs, (b) It is a graph which shows the output in the same various patterns. It is a perspective view of the rotor of another example. In another example rotor, (a) is a plan view partially showing a first rotor core, and (b) is a side view showing a first rotor side claw-shaped magnetic pole. It is a perspective view of the stator of another example. In another example stator, (a) is a plan view partially showing a first stator core, and (b) is a side view showing a first stator side claw-shaped magnetic pole. (A) It is a graph which shows the torque in the various patterns from which the shape of an extension part differs, (b) It is a graph which shows the output in the same various patterns.

Hereinafter, an embodiment of the motor will be described.
As shown in FIG. 1, the brushless motor 10 of this embodiment includes a rotor 12 having a rotation shaft 11 and an annular stator 13 that is disposed outside the rotor 12 and is fixed to a motor housing (not shown). Yes.

[Configuration of rotor]
As shown in FIG. 2, the rotor 12 includes three-phase (U-phase, V-phase, and W-phase) rotor units 14u, 14v, and 14w stacked in the axial direction. Each of the rotor units 14u, 14v, and 14w has substantially the same configuration, and includes a first and second rotor cores 21 and 22, and a field magnet 23 sandwiched between the first and second rotor cores 21 and 22. ing.

  As shown in FIGS. 2 and 4, the first rotor core 21 has a first rotor core base 24 formed in a substantially disc shape. The first rotor core base 24 includes a circular plate portion 24b having a through hole 24a in which the rotary shaft 11 is inserted and fixed in a central portion of the diameter, and a plurality of extending portions extending radially outward from the outer peripheral edge of the circular plate portion 24b. 24c. In the present embodiment, twelve extending portions 24c are provided at equal intervals in the circumferential direction (30 degree intervals).

  As shown in FIG. 3A, the extending portion 24c has a trapezoidal shape that becomes narrower toward the outer side in the radial direction when viewed from the axial direction. Further, the shape of the extension 24c will be described in detail. The circumferential center line L of the extension 24c (a straight line passing through the circumferential center P1 at the radial base end and the circumferential center P2 at the radial distal end). Is orthogonal to the axis of the rotating shaft 11. And the extension part 24c has comprised the shape which becomes line symmetrical with respect to the circumferential direction center line L seeing from an axial direction.

  The first rotor core 21 integrally includes a first rotor-side claw-shaped magnetic pole 25 that protrudes in the axial direction from the radial front end (outer peripheral end) of each extending portion 24c. The first rotor-side claw-shaped magnetic pole 25 may be formed by bending the extending portion 24c at a right angle, or may be integrally formed with the extending portion 24c by casting.

  As shown in FIG. 3B, the first rotor-side claw-shaped magnetic pole 25 has a left-right asymmetric trapezoidal shape as viewed from the radial direction (front). More specifically, the first rotor-side claw-shaped magnetic pole 25 is formed such that the circumferential width of the axial base end thereof is equal to the circumferential width of the distal end portion (outer peripheral end) of the extending portion 24c. The trapezoidal shape has a narrower circumferential width toward the tip end in the axial direction. Further, both end surfaces in the circumferential direction of the first rotor-side claw-shaped magnetic pole 25 are flat surfaces that are not parallel to each other. Further, in the first rotor side claw-shaped magnetic pole 25, a straight line L0 passing through the circumferential center X1 of the axial base end portion and the circumferential center X2 of the axial distal end portion is inclined with respect to the axial direction.

  As shown in FIG. 4, the second rotor core 22 has substantially the same configuration as the first rotor core 21, and includes a second rotor core base 26 and a second rotor side claw-shaped magnetic pole 27. The disc part 26b (through hole 26a) and the extension part 26c of the second rotor core base 26 have the same shape as the disc part 24b (through hole 24a) and the extension part 24c of the first rotor core base 24, respectively. Yes.

  As shown in FIG. 2, in the assembled state, the second rotor core base 26 is disposed in parallel to the first rotor core base 24, and the field magnet 23 is disposed between the core bases 24 and 26. The extending portions 24c and 26c of the core bases 24 and 26 are alternately arranged in the circumferential direction as viewed from the axial direction, and are arranged at equal intervals in the circumferential direction (15-degree intervals in the present embodiment). The first and second rotor side claw-shaped magnetic poles 25 and 27 are arranged so as to be alternately arranged in the circumferential direction, and are configured such that their protruding directions are opposite to each other. In other words, each second rotor side claw-shaped magnetic pole 27 is disposed between each first rotor side claw-shaped magnetic pole 25.

  The axial length of the first rotor-side claw-shaped magnetic pole 25 is such that the front end surface of the first rotor-side claw-shaped magnetic pole 25 is flush with the opposing surface 26d (the axial inner surface) of the second rotor core base 26. Is set to Similarly, the axial length of the second rotor-side claw-shaped magnetic pole 27 is such that the tip surface of the second rotor-side claw-shaped magnetic pole 27 is flush with the opposing surface 24d (the axial inner surface) of the first rotor core base 24. It is set to be.

  Here, the second rotor-side claw-shaped magnetic pole 27 has a left-right asymmetric trapezoidal shape as viewed from the radial direction (front). More specifically, the second rotor-side claw-shaped magnetic pole 27 is formed such that the circumferential width of the axial base end thereof is equal to the circumferential width of the radially distal end (outer end) of the extending portion 26c. The trapezoidal shape has a narrower circumferential width toward the tip end in the axial direction. Further, both end surfaces in the circumferential direction of the second rotor-side claw-shaped magnetic pole 27 are flat surfaces that are not parallel to each other.

  As shown in FIG. 4, the field magnet 23 is a disk-shaped permanent magnet made of, for example, a ferrite magnet. A through hole 23 a through which the rotation shaft 11 is inserted is formed at the center position of the field magnet 23. Then, one end face 23b of the field magnet 23 abuts the opposing face 24d of the first rotor core base 24 and the other end face 23c of the field magnet 23 abuts the opposing face 26d of the second rotor core base 26, respectively. The magnet 23 is clamped and fixed between the first rotor core base 24 and the second rotor core base 26 in the axial direction. The outer diameter of the field magnet 23 is set so as to coincide with the outer diameter of the disk portions 24b and 26b of the core bases 24 and 26.

  The field magnet 23 is magnetized in the axial direction so that the first rotor core base 24 side has an N pole and the second rotor core base 26 side has an S pole. Therefore, by this field magnet 23, the first rotor side claw-shaped magnetic pole 25 of the first rotor core 21 functions as an N pole (first magnetic pole), and the second rotor side claw-shaped magnetic pole 27 of the second rotor core 22 becomes the S pole. It functions as (second magnetic pole).

  As described above, the rotor units 14u, 14v, and 14w having the so-called Landel type structure using the field magnet 23 include the first rotor-side claw-shaped magnetic pole 25 serving as the N pole and the second rotor-side claw serving as the S pole. The magnetic poles 27 are alternately arranged in the circumferential direction, and the number of magnetic poles is 24 (the number of pole pairs is 12).

  As shown in FIG. 2, the rotor units 14u, 14v, and 14w are stacked in the axial direction to form the rotor 12. Note that the rotor units 14u, 14v, and 14w for each phase are a U-phase rotor unit 14u, a V-phase rotor unit 14v, and a W-phase rotor unit 14w in order from the top in FIG.

  The rotor units 14u, 14v, and 14w of each phase are stacked with phases shifted by 60 degrees in electrical angle (5 degrees in mechanical angle). Specifically, the V-phase rotor unit 14v is arranged with a phase difference of 60 degrees in electrical direction in the counterclockwise direction with respect to the U-phase rotor unit 14u. Further, the W-phase rotor unit 14w is arranged with a phase difference of 60 degrees in terms of electrical angle in the counterclockwise direction with respect to the V-phase rotor unit 14v.

  The U-phase and W-phase rotor units 14u and 14w are stacked such that the first rotor core 21 is on the upper side, and the V-phase rotor unit 14v is stacked so that the second rotor core 22 is on the upper side. That is, the magnetization direction of the field magnet 23 of the U-phase and W-phase rotor units 14u and 14w is the same direction (upward in FIG. 2), and the magnetization direction of the field magnet 23 of the V-phase rotor unit 14v is U-phase. In addition, the direction is opposite to the magnetization direction of the field magnet 23 of the W-phase rotor units 14u and 14w (downward in FIG. 2).

  Further, the second rotor core bases 26 of the U-phase and V-phase rotor units 14u, 14v are adjacent to each other in the axial direction, and the U-phase and V-phase rotor units 14u, 14v are connected via the adjacent second rotor core base 26. The S pole side of the field magnet 23 is configured to face each other. Further, the first rotor core bases 24 of the V-phase and W-phase rotor units 14v and 14w are adjacent to each other in the axial direction, and the V-phase and W-phase rotor units 14v and 14w are connected via the adjacent first rotor core base 24. The N pole side of the field magnet 23 is configured to face each other.

  Further, the protruding directions in the axial direction of the first rotor-side claw-shaped magnetic poles 25 of the U-phase and W-phase rotor units 14u and 14w are the same direction (downward in FIG. 2), and the V-phase rotor is in the same direction. The protruding direction of the first rotor side claw-shaped magnetic pole 25 of the unit 14v is opposite (upward in FIG. 2).

  Similarly, the protruding directions in the axial direction of the claw-shaped magnetic poles 27 on the second rotor side of the U-phase and W-phase rotor units 14u and 14w are the same direction (upward in FIG. 2). The protruding direction of the second rotor side claw-shaped magnetic pole 27 of the rotor unit 14v is opposite (downward in FIG. 2).

  As shown in FIG. 7, in each rotor unit 14u, 14v, 14w, the radially outer surface of the first rotor-side claw-shaped magnetic pole 25 (the surface facing the stator 13) has one circumferential end 25a as viewed from the radial direction. (Clockwise front end) is a straight line along the axial direction, and the other end in the circumferential direction (clockwise rearward end) is inclined so that the tip end is closer to the circumferential end 25a. It has become. In other words, the first rotor-side claw-shaped magnetic pole 25 has a circumferential center X2 of the distal end portion with respect to the circumferential center X1 of the proximal end portion (matching the circumferential center P2 at the radial distal end portion of the extending portion 24c). It has a shape shifted in one circumferential direction (clockwise in this embodiment).

  Further, in each rotor unit 14u, 14v, 14w, the radially outer surface of the second rotor-side claw-shaped magnetic pole 27 (the surface facing the stator 13) has a circumferential end 27a (clockwise direction) when viewed from the radial direction. The front end is a straight line along the axial direction, and the other end in the circumferential direction (the rear end in the clockwise direction) is an inclined portion 27b that is inclined so as to approach the circumferential end 27a toward the tip end. As a result, the second rotor-side claw-shaped magnetic pole 27 has a shape in which the circumferential center Y2 of the distal end portion is shifted in one circumferential direction (clockwise direction in the present embodiment) with respect to the circumferential center Y1 of the proximal end portion. ing.

  That is, the first and second rotor-side claw-shaped magnetic poles 25 and 27 have the circumferential center X2. Y2 has a shape shifted in the same direction (clockwise direction). Further, the first and second rotor side claw-shaped magnetic poles 25 and 27 have their center positions C1 and C2 (circumferential center positions in the axial center of the claw-shaped magnetic poles 25 and 27) at equal intervals in the circumferential direction (this embodiment). In this case, the interval is 15 degrees. Further, the inclination angle θ1 (inclination angle with respect to the axial direction) of the inclined portion 25b of the first rotor-side claw-shaped magnetic pole 25 and the inclination angle θ2 (inclination angle with respect to the axial direction) of the inclined portion 27b of the second rotor-side claw-shaped magnetic pole 27. Are set equal to each other.

[Stator]
As shown in FIG. 5, the stator 13 disposed on the radially outer side of the rotor 12 has three phases (U phase, V phase, and W phase) stacked in the axial direction corresponding to the rotor units 14u, 14v, and 14w. ) Stator units 30u, 30v, 30w. Each of the stator units 30u, 30v, 30w has the same configuration, and the first and second stator cores 31, 32 and the coil portion 33 disposed between the first and second stator cores 31, 32 in the axial direction. It is composed of

  As shown in FIGS. 5 and 6, the first stator core 31 has an annular plate-shaped first stator core base 34. The first stator core base 34 has an annular portion 34a that forms an annular shape in the circumferential direction of the rotating shaft 11, and a plurality of extending portions 34b that extend radially inward from the annular portion 34a. In the present embodiment, twelve extending portions 34b are provided at equal intervals in the circumferential direction (30-degree intervals). The extension part 34b has a trapezoidal shape that is narrower toward the inner side in the radial direction and symmetrical with respect to the center line in the circumferential direction when viewed from the axial direction.

  The first stator core 31 integrally has a first stator side claw-shaped magnetic pole 35 that protrudes in the axial direction (downward in FIG. 5) from the radial front end (outer peripheral end) of each extending portion 34b. . The first stator side claw-shaped magnetic pole 35 may be formed by bending the extending portion 34b at a right angle, or may be integrally formed with the extending portion 34b by casting.

  The first stator side claw-shaped magnetic pole 35 has a trapezoidal shape that is asymmetrical when viewed from the radial direction (front). Specifically, the first stator side claw-shaped magnetic pole 35 is formed such that the circumferential width of the axial base end portion thereof is equal to the circumferential width of the radially distal end portion (inner circumferential side end portion) of the extending portion 34b. At the same time, a trapezoidal shape with a narrower circumferential width is formed on the tip side in the axial direction. Further, both end surfaces in the circumferential direction of the first stator side claw-shaped magnetic pole 35 are flat surfaces which are not parallel to each other.

  Further, as shown in FIG. 8, the radially inner side surface (the surface facing the rotor 12) of the first stator side claw-shaped magnetic pole 35 has a circumferential end 35a (clockwise rear end) when viewed from the radial direction. ) Forms a straight line along the axial direction, and the other end in the circumferential direction (front end in the clockwise direction) is an inclined portion 35b that is inclined so as to approach the one end 35a in the circumferential direction toward the tip end side. That is, the first stator side claw-shaped magnetic pole 35 has a shape in which the circumferential center Z2 of the distal end portion is shifted in one circumferential direction (counterclockwise direction in this embodiment) with respect to the circumferential center Z1 of the proximal end portion. ing.

  As shown in FIG. 6, the second stator core 32 has substantially the same configuration as the first stator core 31, and has a second stator core base 36 and a second stator side claw-shaped magnetic pole 37. The annular portion 36a and the extending portion 36b of the second stator core base 36 have the same shape as the annular portion 34a and the extending portion 34b of the first stator core base 34, respectively.

  As shown in FIG. 5, the annular portions 34a, 36a of the stator core bases 34, 36 are in contact with each other in the axial direction to form the outer peripheral wall portion of the first stator core 31. A coil portion 33 having an annular shape in the circumferential direction of the rotating shaft 11 is disposed in a space on the circumferential side between the extending portions 34b and 36b in the axial direction.

  The extending portions 34b and 36b of the stator core bases 34 and 36 are alternately arranged in the circumferential direction when viewed from the axial direction, and are arranged at equal intervals in the circumferential direction (15-degree intervals in the present embodiment). The extending portions 34b and 36b are parallel to each other. In each stator unit 30u, 30v, 30w, the first and second stator side claw-shaped magnetic poles 35, 37 are arranged so as to be alternately arranged in the circumferential direction, and their protruding directions are opposite to each other. It is configured. In other words, each second stator side claw-shaped magnetic pole 37 is disposed between each first stator side claw-shaped magnetic pole 35.

  Here, the second stator side claw-shaped magnetic pole 37 has a left-right asymmetric trapezoidal shape when viewed from the radial direction (front). More specifically, the second stator side claw-shaped magnetic pole 37 is formed such that the circumferential width of the axial base end portion thereof is equal to the circumferential width of the distal end portion (outer circumferential end portion) of the extending portion 36b. The trapezoidal shape has a narrower circumferential width toward the tip end in the axial direction. Further, both end surfaces in the circumferential direction of the second stator side claw-shaped magnetic pole 37 are flat surfaces which are not parallel to each other.

  Further, as shown in FIG. 8, the radially inner side surface (the surface facing the rotor 12) of the second stator side claw-shaped magnetic pole 37 has a circumferential end 37a (clockwise rear end) when viewed from the radial direction. ) Has a linear shape along the axial direction, and the other end in the circumferential direction (the front end in the clockwise direction) is an inclined portion 37b that is inclined so as to approach the one end 37a in the circumferential direction toward the tip end side. Thereby, the second stator side claw-shaped magnetic pole 37 has a shape in which the circumferential center T2 of the distal end portion is shifted in one circumferential direction (counterclockwise direction in this embodiment) with respect to the circumferential center T1 of the proximal end portion. There is no.

  In other words, the first and second stator side claw-shaped magnetic poles 35 and 37 have shapes in which the circumferential centers Z2 and T2 of the tip portions thereof are shifted in the same direction (counterclockwise direction). Further, the first and second stator side claw-shaped magnetic poles 35 and 37 have their center positions C3 and C4 (circumferential center positions in the axial center of the claw-shaped magnetic poles 35 and 37) at equal intervals in the circumferential direction (this embodiment). In this case, the interval is 15 degrees. In addition, the inclination angle θ3 (inclination angle with respect to the axial direction) of the inclined portion 35b of the first stator side claw-shaped magnetic pole 35 and the inclination angle θ4 (inclination angle with respect to the axial direction) of the inclined portion 37b of the second stator side claw-shaped magnetic pole 37. Are set equal to each other.

  The stator units 30u, 30v, and 30w configured as described above are so-called Randel type with 24 poles that excite the first and second stator side claw-shaped magnetic poles 35 and 37 to different magnetic poles from time to time in the coil portion 33. (Claw pole type) structure.

  Then, as shown in FIG. 5, the stator units 30u, 30v, 30w are stacked in the axial direction such that the first stator core bases 34 and the second stator core bases 36 are alternately arranged in the axial direction. A stator 13 is configured. Note that the stator units 30u, 30v, and 30w for each phase are a U-phase stator unit 30u, a V-phase stator unit 30v, and a W-phase stator unit 30w in order from the top in FIG.

  In addition, the stator units 30u, 30v, and 30w of each phase are stacked with phases shifted by 60 degrees in electrical angle (5 degrees in mechanical angle). More specifically, the V-phase stator unit 30v is arranged with a phase difference of 60 degrees in the clockwise direction with respect to the U-phase stator unit 30u in the clockwise direction. Further, the W-phase stator unit 30w is arranged with the phase shifted by 60 degrees in the clockwise direction with respect to the V-phase stator unit 30v.

  Thereby, the direction of inclination with respect to the axial direction (see FIG. 2) in which each phase of the rotor units 14u, 14v, 14w is displaced in the circumferential direction when viewed from the radial direction, and the stator units 30u, 30v, 30 The direction of inclination with respect to the axial direction (see FIG. 5) in which the circumferential displacement of 30w is formed is opposite to each other on the opposed surfaces of the rotor 12 and the stator 13. Thereby, the first and second rotor side claw-shaped magnetic poles 25 and 27 of each phase can be suitably followed with respect to the switching of the magnetic poles of the first and second stator side claw-shaped magnetic poles 35 and 37, and as a result. A suitable rotation of the rotor 12 can be realized.

Next, the operation of the brushless motor 10 configured as described above will be described.
When a three-phase AC power supply voltage is applied to the stator 13, a U-phase power supply voltage is applied to the coil portion 33 of the U-phase stator unit 30u, a V-phase power supply voltage is applied to the coil portion 33 of the V-phase stator unit 30v, and a W-phase stator unit. A W-phase power supply voltage is applied to each of the 30 w coil portions 33. As a result, a rotating magnetic field is generated in the stator 13 and the rotor 12 is driven to rotate.

  Here, consider a case where the rotor 12 shown in FIG. 2 rotates counterclockwise. At this time, as shown in FIGS. 7 and 8, the inclined portions 25b and 27b are positioned on the front side in the rotor rotation direction of the rotor side claw-shaped magnetic poles 25 and 27, and the rotor rotation of the stator side claw-shaped magnetic poles 35 and 37 is performed. The inclined portions 35b and 37b are located on the rear side in the direction. That is, each rotor-side claw-shaped magnetic pole 25, 27 has an asymmetric shape in which the circumferential center X2, Y2 of the distal end is shifted in the counter-rotating direction of the rotor 12 with respect to the circumferential center X1, Y1 of the proximal end, Each of the stator side claw-shaped magnetic poles 35 and 37 has an asymmetric shape in which the circumferential center Z2 and T2 of the distal end portion is shifted in the rotational direction of the rotor 12 with respect to the circumferential center Z1 and T1 of the proximal end portion.

  Compared to this configuration, when the conventional configuration in which the claw-shaped magnetic poles of the rotor and the stator are symmetric when viewed from the radial direction is compared, as shown in FIGS. Compared to the conventional configuration, the torque is improved to 120% or more, and the output is improved to 130% or more.

  When the rotor rotates, the magnet torque generated by each field magnet 23 acts as a positive torque (rotational torque) for both attraction and repulsion, but the reluctance torque acts as a positive torque for attraction and a negative torque for repulsion. In the conventional configuration, the suction component and the repulsion component of the reluctance torque are offset, and the reluctance torque hardly contributes to the rotational torque.

  On the other hand, in this embodiment, each rotor side claw-shaped magnetic pole 25, 27 has an asymmetrical shape with the tip side shifted in the counter-rotating direction of the rotor 12, and each stator side claw-shaped magnetic pole 35, 37 has the tip side on the rotor 12. Asymmetrical shape shifted in the direction of rotation. As a result, the repulsion component of the reluctance torque that acts as a negative torque is suppressed. As a result, the suction component of the reluctance torque that acts as a positive torque remains, so that the torque and output are improved.

Next, characteristic effects of the present embodiment will be described.
(1) The rotor-side claw-shaped magnetic poles 25 and 27 and the stator-side claw-shaped magnetic poles 35 and 37 have a shape (asymmetric shape) in which the circumferential center of the distal end is shifted in the circumferential direction with respect to the circumferential center of the proximal end. ). As a result, the reluctance torque can be varied depending on the shape of the claw-shaped magnetic poles 25, 27, 35, 37, and as a result, the motor performance (torque and output) can be varied even when the power supply to the stator 13 is the same. Can do.

  (2) Each rotor-side claw-shaped magnetic pole 25, 27 has an asymmetric shape with the tip side shifted in the counter-rotating direction of the rotor 12, and each stator-side claw-shaped magnetic pole 35, 37 is shifted in the rotation direction of the rotor 12. Asymmetrical shape. Thereby, the repulsion component of the reluctance torque which acts as a negative torque can be suppressed, and as a result, it can contribute to an improvement in torque and output.

In addition, you may change the said embodiment as follows.
The shift direction (shift direction) on the tip side of each claw-shaped magnetic pole 25, 27, 35, 37 is not limited to the above embodiment.

  For example, as shown in FIG. 10, the tip shift direction of the first rotor-side claw-shaped magnetic pole 25 and the tip shift direction of the second rotor-side claw-shaped magnetic pole 27 may be opposite to each other. FIG. 10 shows an example in which the tip shift direction of the first rotor-side claw-shaped magnetic pole 25 is the counter-rotation direction of the rotor 12 and the tip shift direction of the second rotor-side claw-shaped magnetic pole 27 is the rotation direction of the rotor 12. Show. According to these configurations, the inclined portions 25b and 27b of the rotor-side claw-shaped magnetic poles 25 and 27 face each other in the circumferential direction.

  Similarly, on the stator 13 side, the front end shift direction of the first stator side claw-shaped magnetic pole 35 and the front end shift direction of the second stator side claw-shaped magnetic pole 37 are opposite to each other. , 37 may be opposed to each other in the circumferential direction.

  Here, FIGS. 13A and 13B show torques and outputs in various patterns in which the tip end shift directions of the claw-shaped magnetic poles 25, 27, 35, and 37 on the rotor 12 side and the stator 13 side are different. 13A and 13B, a configuration in which the tip shift direction is the counter-rotation direction of the rotor 12 is a pattern “A”, and a configuration in which the tip shift direction is the rotation direction of the rotor 12 is a pattern “B”. A configuration in which the shift direction is opposite in the first and second rotor side claw-shaped magnetic poles 25 and 27 (or the first and second stator side claw-shaped magnetic poles 35 and 37) (see FIG. 10) is a pattern “C”. The conventional configuration (symmetrical shape) is a pattern “D”. In FIGS. 13A and 13B, the torque or output of the configuration in which the pattern on the rotor side / stator side is “D / D” (the conventional configuration) is 100%.

  As shown in FIG. 13A, among the combinations of the above patterns, the configuration in which the pattern on the rotor side / stator side is “A / B” (the configuration in the above embodiment) has the highest torque. From “D · B”, “A · C”, “D · C”, “C · B”, “A · D”, “C · C”, “B · B” The torque of those patterns is higher than 100%. That is, the torque can be improved by using the claw-shaped magnetic poles 25, 27, 35, and 37 on the rotor side and the stator side as these patterns.

  Further, the configuration in which the pattern on the rotor side / stator side is “C / D” has a torque of 100% or less, and “B / C”, “A / A”, “D / A”, “ The torque decreases to “B · D”, “C · A”, and “B · A”. That is, a motor capable of obtaining a low torque can be provided by using the claw-shaped magnetic poles 25, 27, 35, and 37 on the rotor side and the stator side as these patterns.

  Here, in the above embodiment, when the rotor 12 shown in FIG. 2 rotates counterclockwise (forward rotation), the pattern on the rotor side / stator side becomes “A / B”. When rotating around (reversely rotating), the pattern on the rotor side / stator side is “B / A”. Thereby, when rotating the rotor 12 forward and backward with the same power supply to the stator 13, the torque in the reverse rotation can be made smaller than the torque in the normal rotation.

  Then, when two operations with different loads due to forward and reverse rotation of the rotor 12 are respectively performed, an operation with a larger load is performed by the forward rotation and an operation with a smaller load is performed by the reverse rotation. Is desirable. For example, in a vehicle power window device, the loads of the opening operation and the closing operation differ depending on the weight of the glass. Therefore, if the forward rotation of the rotor 12 is assigned to the glass closing operation and the reverse rotation is assigned to the glass opening operation, a suitable glass opening / closing operation can be realized without changing the magnitude of the power supply to the stator 13. Become.

  As shown in FIG. 13B, the patterns on the rotor side and the stator side are “A · B”, “D · B”, “A · C”, “D · C”, “C · B”, “A”. In the configurations of “D”, “C · C”, and “B · B”, the output is higher than 100%. That is, the output can be improved by using the claw-shaped magnetic poles 25, 27, 35, and 37 on the rotor side and the stator side as these patterns. In addition, the configuration in which the pattern on the rotor side / stator side is “A / B” (configuration in the above embodiment) provides the highest output.

  In addition, the pattern on the rotor side / stator side is “C / D”, “B / C”, “A / A”, “D / A”, “B / D”, “C / A”, “B / A”. In the configuration of “”, the output is 100% or less. That is, a motor capable of obtaining a low output can be provided by using the claw-shaped magnetic poles 25, 27, 35, and 37 on the rotor side and the stator side as these patterns.

  13A and 13B, the pattern on the stator side is “B”, that is, the tip shift direction of the first and second stator side claw-shaped magnetic poles 35 and 37 is the rotation direction of the rotor 12. In some cases, torque and output can be improved regardless of the pattern on the rotor side.

  In the above embodiment, the inclination angle θ1 of the inclined portion 25b of the first rotor-side claw-shaped magnetic pole 25 and the inclination angle θ2 of the inclined portion 27b of the second rotor-side claw-shaped magnetic pole 27 are set equal to each other. The tilt angle θ1 and the tilt angle θ2 may be set to be different from each other, as shown in FIG. In the example shown in FIG. 11, the inclination angle θ2 <the inclination angle θ1 is set. However, the inclination angle θ1 <the inclination angle θ2 may be opposite to this. Similarly, on the stator 13 side, the inclination angle θ3 of the inclined portion 35b of the first stator side claw-shaped magnetic pole 35 and the inclination angle θ4 of the inclined portion 37b of the second stator side claw-shaped magnetic pole 37 are different from each other. It may be set.

  In the above embodiment, the first and second rotor-side claw-shaped magnetic poles 25 and 27 are configured such that their center positions C1 and C2 are equally spaced in the circumferential direction, but are not particularly limited thereto. Instead, as shown in FIG. 12, the center positions C1 and C2 may be configured so as to be spaced apart from each other in the circumferential direction. Similarly, on the stator 13 side, the center positions C3 and C4 of the first and second stator side claw-shaped magnetic poles 35 and 37 may be configured to be spaced at irregular intervals in the circumferential direction.

  In the above embodiment, the circumferential ends (circumferential ends 25a, 27a, 35a, 37a) opposite to the inclined portions 25b, 27b, 35b, 37b in the claw-shaped magnetic poles 25, 27, 35, 37 are Although it was formed in a straight line shape along the axial direction of the rotating shaft 11, the present invention is not particularly limited thereto, and may be inclined with respect to the axial direction of the rotating shaft 11. In the above embodiment, the claw-shaped magnetic poles 25, 27, 35, and 37 are trapezoidal in the radial direction. However, for example, a triangular shape, a semicircular shape, a semielliptical shape, a polygonal shape, and the like may be used.

The number of claw-shaped magnetic poles 25, 27, 35, 37 (the number of magnetic poles) is not limited to the above embodiment, and may be changed as appropriate according to the configuration.
In the first and second rotor cores 21 and 22 of the above embodiment, the tips of the first and second rotor side claw-shaped magnetic poles 25 and 27 are configured to shift (shift) in the circumferential direction, but the present invention is not limited thereto. However, the distal ends in the radial direction of the extending portions 24c and 26c may be configured to be displaced in the circumferential direction.

  For example, as shown in FIGS. 14 and 15 (a) and 15 (b), the extending portions 24c and 26c of the first and second rotor core bases 24 and 26 have their radial tip portions (outer end portions). Is shifted in one circumferential direction (clockwise in FIG. 14).

  The extension portion 24c of the first rotor core base 24 will be described as an example. As shown in FIG. 15A, the extension portion 24c becomes narrower toward the outer side in the radial direction when viewed from the axial direction and is asymmetric in the circumferential direction. A trapezoidal shape. The extending portion 24c has a shape in which the circumferential center P2 at the distal end in the radial direction is shifted in one circumferential direction (clockwise direction) with respect to the circumferential center P1 at the radially proximal end. That is, the straight line L1 that passes through the circumferential centers P1 and P2 of the proximal end and the distal end of the extending portion 24c is configured not to be orthogonal to the axis of the rotating shaft 11.

  Further, the first rotor core 21 integrally includes a first rotor-side claw-shaped magnetic pole 25 that protrudes in the axial direction from the radial tip (outer peripheral end) of each extending portion 24c. As shown in FIG. 15B, the outer peripheral surface 25c (the surface facing the stator) of the first rotor-side claw-shaped magnetic pole 25 has a rectangular shape that is symmetrical with respect to the radial direction (front). Specifically, the circumferential center line L2 of the first rotor-side claw-shaped magnetic pole 25 (a straight line passing through the circumferential center X1 of the axial base end and the circumferential center X2 of the axial distal end) is relative to the axial direction. Are parallel. And the 1st rotor side claw-shaped magnetic pole 25 has comprised the shape which becomes line symmetrical with respect to the circumferential direction centerline L2 seeing from radial direction.

The second rotor core 22 has an extending portion 26c and a second rotor-side claw-shaped magnetic pole 27 having the same configuration as the extending portion 24c and the first rotor-side claw-shaped magnetic pole 25 of the first rotor core 21, respectively.
In consideration of the case where the rotor 12 shown in FIG. 14 rotates counterclockwise, the extended portions 24c and 26c have a circumferential center P2 at the distal end thereof that is the circumferential center P1 of the proximal end portion. It has an asymmetrical shape shifted in the counter-rotating direction.

  Even with the above-described configuration, the reluctance torque can be varied depending on the shapes of the extending portions 24c and 26c of the first and second rotor cores 21 and 22, and as a result, even if the power supply to the stator 13 is the same. The motor performance (torque and output) can be varied.

  In the first and second stator cores 31 and 32 of the above-described embodiment, the tips of the first and second stator side claw-shaped magnetic poles 35 and 37 are configured to shift (shift) in the circumferential direction. However, the present invention is not limited thereto, and the distal ends in the radial direction of the extending portions 34b and 36b may be shifted in the circumferential direction.

  For example, as shown in FIGS. 16 and 17A and 17B, the extending portions 34b and 36b of the first and second stator core bases 34 and 36 have their radial end portions (inner peripheral side end portions). ) Is shifted in one circumferential direction (counterclockwise in FIG. 16).

  The extension portion 34b of the first stator core base 34 will be described as an example. As shown in FIG. 17A, the extension portion 34b becomes narrower toward the radially inner side when viewed from the axial direction and is asymmetric in the circumferential direction. A trapezoidal shape. Further, the extending portion 34b has a shape in which the circumferential center P4 at the radially distal end is displaced in one circumferential direction (counterclockwise direction) with respect to the circumferential center P3 at the radially proximal end portion. In other words, the straight line L3 passing through the circumferential centers P3 and P4 of the proximal end and the distal end of the extending portion 34b is configured not to be orthogonal to the axis of the rotating shaft 11.

  Further, the first stator core 31 integrally includes a first stator side claw-shaped magnetic pole 35 that protrudes in the axial direction from the radial front end portion (inner peripheral side end portion) of each extending portion 34b. As shown in FIG. 17B, the inner peripheral surface 35c (the surface facing the rotor) of the first stator side claw-shaped magnetic pole 35 has a rectangular shape that is symmetrical with respect to the radial direction (front). More specifically, the circumferential center line L4 (the straight line passing through the circumferential center Z1 of the axial base end and the circumferential center Z2 of the axial distal end) of the first stator side claw-shaped magnetic pole 35 is in the axial direction. Are parallel. And the 1st stator side claw-shaped magnetic pole 35 has comprised the shape which is line symmetrical with respect to the circumferential direction centerline L4 seeing from radial direction.

  The second stator core 32 has an extending portion 36b and a second stator side claw-shaped magnetic pole 37 having the same configuration as the extending portion 34b and the first stator side claw-shaped magnetic pole 35 of the first stator core 31, respectively.

  In consideration of the case where the rotor 12 rotates counterclockwise, the extending portions 34b and 36b have the circumferential center P4 at the distal end shifted in the rotational direction of the rotor 12 with respect to the circumferential center P3 at the proximal end. Asymmetrical shape.

  Even with the above-described configuration, the reluctance torque can be varied depending on the shapes of the extending portions 34b and 36b of the first and second stator cores 31 and 32. As a result, even when the power supply to the stator 13 is the same. The motor performance (torque and output) can be varied.

The shift direction (shift direction) on the distal end side in the radial direction of each of the extending portions 24c, 26c, 34b, 36b described above is not limited to the examples in FIGS.
Here, FIGS. 18A and 18B show torques and outputs in various patterns in which the tip end shift directions of the extending portions 24c, 26c, 34b, and 36b on the rotor 12 side and the stator 13 side are different. 18A and 18B, a configuration in which the tip shift direction is the counter-rotation direction of the rotor 12 is a pattern “L”, and a configuration in which the tip shift direction is the rotation direction of the rotor 12 is a pattern “R”. The conventional configuration (symmetrical shape) is the pattern “N”. Further, in FIGS. 18A and 18B, the torque or output of the configuration in which the pattern on the rotor side / stator side is “N · N” (the conventional configuration) is 100%.

  As shown in FIG. 18 (a), among the combinations of the above patterns, the configuration in which the pattern on the rotor side / stator side is “LR” (the configuration in FIGS. 14 to 17) has the highest torque. The torque decreases sequentially from the pattern to “L · N”, “L·L”, and “N · R”, but the torque of these patterns is higher than 100%. That is, the torque can be improved by using the extended portions 24c, 26c, 34b, and 36b on the rotor side and the stator side as these patterns.

  Further, the configuration in which the patterns on the rotor side and the stator side are “N · L”, “R · R”, “R · L”, and “R · N” has a torque of 100% or less. That is, the motor which can obtain a low torque can be provided by making the extension part 24c, 26c, 34b, 36b of a rotor side and a stator side into these patterns.

  Here, in the combination of the rotor 12 and the stator 13 shown in FIGS. 14 and 16, when the rotor 12 rotates counterclockwise (forward rotation), the pattern on the rotor side / stator side becomes “L / R”. However, when the rotor 12 rotates clockwise (reverse rotation), the pattern on the rotor side / stator side becomes “R · L”. Thereby, when rotating the rotor 12 forward and backward with the same power supply to the stator 13, the torque in the reverse rotation can be made smaller than the torque in the normal rotation.

  As shown in FIG. 18B, the output is higher than 100% when the rotor-side and stator-side patterns are “L · R”, “L · N”, and “L·L”. That is, the output can be improved by setting the extended portions 24c, 26c, 34b, and 36b on the rotor side and the stator side to these patterns. A configuration in which the pattern on the rotor side / stator side is “L / R” (configuration in the above embodiment) has the highest output.

  In addition, when the rotor side / stator side pattern is “N · R”, “N · L”, “R · R”, “R · L”, or “R · N”, the output is 100% or less. . That is, the motor which can obtain a low output can be provided by making the extension part 24c, 26c, 34b, 36b of a rotor side and a stator side into these patterns.

  Further, as shown in FIGS. 18A and 18B, the pattern on the rotor side is “L”, that is, the tip shift directions of the extending portions 24c and 26c of the first and second rotor cores 21 and 22 are the same as those of the rotor 12. In the counter-rotating direction, torque and output can be improved regardless of the pattern on the stator side.

  In the examples of FIGS. 14 to 17, the tip shift directions of the extending portions 24 c and 26 c of the first and second rotor cores 21 and 22 are the same direction, but the present invention is not limited to this, and the tip shift direction is not limited to this. The extending portion 24c of the first rotor core 21 and the extending portion 26c of the second rotor core 22 may be configured to be opposite to each other. Similarly, on the stator 13 side, the leading end shift direction of the extending portion 34b of the first stator core 31 and the leading end shift direction of the extending portion 36b of the second stator core 32 may be opposite to each other. .

  In the examples of FIGS. 14 to 17, the tip shift amounts (inclinations in the circumferential direction of the straight line L1) of the extending portions 24c and 26c of the first and second rotor cores 21 and 22 are set to be equal to each other. The tip shift amount may be set to be different between the extending portion 24c on the first rotor core 21 side and the extending portion 26c on the second rotor core 22 side. Similarly, in the examples of FIGS. 14 to 17, the tip shift amounts (inclinations in the circumferential direction of the straight line L3) of the extending portions 34b and 36b of the first and second stator cores 31 and 32 are set to be equal to each other. However, the present invention is not particularly limited thereto, and the tip shift amount may be set to be different between the extending portion 34b on the first stator core 31 side and the extending portion 36b on the second stator core 32 side.

  14 to 17, each claw-shaped magnetic pole 25, 27, 35, 37 has a rectangular shape (symmetrical shape in the circumferential direction) when viewed in the radial direction. However, the present invention is not limited to this. It is good also as an asymmetrical shape like a form.

  In the rotor 12 of the above-described embodiment, the magnetization direction of the V-phase field magnet 23 is configured to be opposite to the magnetization directions of the U-phase and W-phase field magnets 23. Instead, the magnetization direction of the field magnet 23 of each phase may be the same.

In the above embodiment, the field magnet 23 is a ferrite magnet, but other than this, for example, a neodymium magnet may be used.
In the above embodiment, the rotor 12 (stator 13) is configured by three layers of rotor units 14u, 14v, 14w (stator units 30u, 30v, 30w), but the rotor units 14u, 14v, 14w (stator units 30u, 30w, 30v, 30w) may be composed of two layers or less or four layers or more.

In the above embodiment, the present invention is applied to the inner rotor type brushless motor 10 in which the rotor 12 is disposed inside the stator 13, but may be applied to an outer rotor type motor.
Next, a technical idea that can be grasped from the above embodiment and another example will be added below.

  (A) Inclined portions that are inclined with respect to the axial direction are formed at circumferential ends of the first and second claw-shaped magnetic poles on the rotor side, and the inclined portion of the first claw-shaped magnetic pole and the second claw-shaped magnetic pole are formed. The motor is characterized in that the inclination angle is set so that their inclination angles are different from each other.

  (B) Inclined portions that are inclined with respect to the axial direction are formed at the circumferential ends of the first and second claw-shaped magnetic poles on the stator side, and the inclined portion of the first claw-shaped magnetic pole and the second claw-shaped magnetic pole are formed. The motor is characterized in that the inclination angle is set so that their inclination angles are different from each other.

(C) A motor characterized in that the first and second claw-shaped magnetic poles on the rotor side are configured such that their center positions are at unequal intervals in the circumferential direction.
(D) A motor characterized in that the first and second claw-shaped magnetic poles on the stator side are configured such that their center positions are at unequal intervals in the circumferential direction.

  According to the motors described in (a) to (d) above, the motor performance (torque and output) can be varied even if the power supply to the stator is the same.

  DESCRIPTION OF SYMBOLS 10 ... Brushless motor, 12 ... Rotor, 13 ... Stator, 21 ... 1st rotor core, 22 ... 2nd rotor core, 23 ... Field magnet, 24b, 26b ... Disk part (base), 24c, 26c, 34b, 36b ... Extension part, 25 ... 1st rotor side claw-shaped magnetic pole (1st claw-shaped magnetic pole on the rotor side), 27 ... 2nd rotor side claw-shaped magnetic pole (2nd claw-shaped magnetic pole on the rotor side), 31 ... 1st stator core, 32 ... second stator core, 33 ... coil part, 34a, 36a ... annular part (base part), 35 ... first stator side claw-shaped magnetic pole (first claw-shaped magnetic pole on the stator side), 37 ... second stator side claw-shaped Magnetic pole (second claw-shaped magnetic pole on the stator side).

Claims (2)

A first rotor core having a plurality of first claw-shaped magnetic poles protruding in the axial direction, a second rotor core having a plurality of second claw-shaped magnetic poles protruding in the axial direction, and an axial direction of the first and second rotor cores And a rotor configured such that the first and second claw-shaped magnetic poles are alternately arranged in the circumferential direction, and the first and second claw-shaped magnetic poles are configured as different magnetic poles by the field magnet. When,
A first stator core having a plurality of first claw-shaped magnetic poles protruding in the axial direction, a second stator core having a plurality of second claw-shaped magnetic poles protruding in the axial direction, and disposed in a circumferential direction between the stator cores The stator side first and second claw-shaped magnetic poles are alternately arranged in the circumferential direction, and opposed to the rotor side first and second claw-shaped magnetic poles, A motor comprising a stator configured so that the polarity of the first and second claw-shaped magnetic poles on the stator side can be switched by different magnetic poles based on energization,
Each claw-shaped magnetic pole on the rotor side has a shape in which the center in the circumferential direction of the distal end portion is shifted in the counter-rotating direction of the rotor with respect to the circumferential center of the proximal end portion
Each of the claw-shaped magnetic poles on the stator side has a shape in which the circumferential center of the distal end portion is shifted in the rotational direction of the rotor with respect to the circumferential center of the proximal end portion . A first rotor core having a plurality of first rotor-side claw-shaped magnetic poles protruding in the axial direction, a second rotor core having a plurality of second rotor-side claw-shaped magnetic poles protruding in the axial direction, and the first and second rotor cores Field magnets arranged between the axial directions, the first and second rotor side claw-shaped magnetic poles are alternately arranged in the circumferential direction, and the field magnets use the first and second rotor side claw-shaped magnetic poles. Rotors configured as different magnetic poles,
A first stator core having a plurality of first stator side claw-shaped magnetic poles protruding in the axial direction, a second stator core having a plurality of second stator side claw-shaped magnetic poles protruding in the axial direction, and a circumference disposed between the stator cores. A coil portion wound in a direction, wherein the first and second stator side claw-shaped magnetic poles are alternately arranged in the circumferential direction and opposed to the first and second rotor side claw-shaped magnetic poles, and the coil portion A motor having a stator configured so that the polarity of the first and second stator side claw-shaped magnetic poles can be switched by different magnetic poles based on energization to
The first and second rotor cores have a plurality of extending portions extending in a radial direction from a base portion sandwiching the field magnet in the axial direction, and the first and second rotor cores are arranged at the distal end portions in the radial direction of the extending portions of the first rotor core. 1 rotor-side claw-shaped magnetic pole is provided, and the second rotor-side claw-shaped magnetic pole is provided at the radial tip of each extending portion of the second rotor core,
The first and second stator cores have a plurality of extending portions extending in a radial direction from a base portion, and the first stator side claw-shaped magnetic pole is provided at a radial tip of each extending portion of the first stator core. The second stator side claw-shaped magnetic pole is provided at the radial tip of each extending portion of the second stator core,
Each extending portion on the rotor side has a shape in which the circumferential center of the radial distal end is shifted in the counter-rotating direction of the rotor with respect to the circumferential center of the radial proximal end,
In addition, each of the extending portions on the stator side has a shape in which the circumferential center of the radial distal end is shifted in the rotational direction of the rotor with respect to the circumferential center of the radial proximal end. Motor.