JP5937425B2 - Rotor and motor - Google Patents

Description

  The present invention relates to a rotor and a motor.

  From the viewpoint of resource saving, low cost, etc., a plurality of magnets with one magnetic pole are arranged in the circumferential direction of the outer peripheral surface of the rotor core, and the core of the rotor core (saliency pole) in which the other magnetic pole is arranged with a gap between each magnet. A motor having a so-called continuous pole type rotor (also referred to as a half magnet type rotor) to be substituted has been devised (see, for example, Patent Document 1).

JP 9-327139 A

  By the way, in the above-described continuous pole type rotor, the iron core portion (saliency pole) having no magnetic force compulsory force and the magnet are mixed, so that magnetic imbalance is likely to occur and there is a risk of generating cogging torque. .

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a rotor and a motor capable of suppressing cogging torque.

In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a plurality of magnets of one magnetic pole are arranged in the circumferential direction of the rotor core to form a magnet magnetic pole part, and the rotor core is interposed between the magnet magnetic pole parts. Each of the rotor cores is arranged so that the iron core portion functions as the other magnetic pole, and the magnet magnetic pole portion has N poles and The first magnetic pole portion is arranged in an axially overlapping manner via a first rotor portion having one of the polarities of the S pole and a magnetic resistance portion serving as a magnetic resistance with the first rotor portion. A second rotor portion having a polarity different from that of the first rotor portion, and the magnet magnetic pole portion of the first rotor portion and the iron core portion of the second rotor portion having the same polarity as the magnet magnetic pole portion. And the magnet magnetic pole part of the second rotor part and the iron core part of the first rotor part having the same polarity as the magnet magnetic pole part are arranged in an axially overlapping manner, and the iron core part is arranged on one side in the circumferential direction. And the first and second rotor parts are inclined to one side in the circumferential direction on the same plane orthogonal to the axial direction. And the iron core portion inclined to the other side in the circumferential direction, and the first rotor portion is inclined to the opposite side across the axis of the rotor of the iron core portion inclined to the one side in the circumferential direction and to the one side in the circumferential direction. Is disposed, and on the opposite side across the axis of the rotor of the iron core portion inclined to the other circumferential side, an iron core portion inclined to the other circumferential side is arranged, and the second rotor portion The axis of the rotor of the iron core inclined to one side Nde on the opposite side, the core portion inclined in the other circumferential side to its gist that you have been placed.

  In the present invention, the magnet magnetic pole portion overlaps in the axial direction via the first rotor portion having one of the N-pole and S-pole polarities and the magnetic resistance portion serving as the magnetic resistance with the first rotor portion. And the magnet magnetic pole portion includes a second rotor portion having a polarity different from that of the first rotor portion. As described above, the magnetic balance can be adjusted by providing the magnet magnetic pole portion capable of generating magnetic flux by changing the polarity between the first rotor portion and the second rotor portion. Further, the magnet magnetic pole portion of the first rotor portion and the iron core portion of the second rotor portion having the same polarity as the magnet magnetic pole portion overlap in the axial direction, and the magnet magnetic pole portion of the second rotor portion and the magnet magnetic pole portion are the same. It arrange | positions in the aspect which overlaps with the iron core part of a polar 1st rotor part in an axial direction. The iron core portion includes an iron core portion that is inclined to one side in the circumferential direction and an iron core portion that is inclined to the other side in the circumferential direction. Accordingly, the cogging torque in the entire rotor can be suppressed by shifting the peak of the cogging torque between the iron core portion inclined to one side in the circumferential direction and the iron core portion inclined to the other side in the circumferential direction.

  In the present invention, the first and second rotor parts are configured to include an iron core part inclined to one side in the circumferential direction and an iron core part inclined to the other side in the circumferential direction on the same plane orthogonal to the axial direction. Each rotor portion can be configured without using a plurality of types of rotor cores in each rotor portion.

According to a second aspect of the present invention, a plurality of magnets having one magnetic pole are arranged in the circumferential direction of the rotor core to form a magnet magnetic pole portion, and an iron core portion formed on the rotor core is provided between each magnet magnetic pole portion. A rotor that is arranged with a gap at each boundary with the magnet magnetic pole part and configured to cause the iron core part to function as the other magnetic pole, wherein the magnet magnetic pole part has a polarity of either one of N pole or S pole And the magnet magnetic pole portion has a polarity different from that of the first rotor portion, and is arranged so as to overlap in the axial direction via the first rotor portion and the magnetoresistive portion serving as a magnetic resistance with the first rotor portion. A magnetic pole portion of the first rotor portion and the iron core portion of the second rotor portion having the same polarity as the magnet magnetic pole portion overlap in the axial direction. The magnet magnetic pole part of the second rotor part and the iron core part of the first rotor part having the same polarity as the magnet magnetic pole part are arranged in an aspect overlapping in the axial direction, and the gap is circumferential on both circumferential sides of the iron core part. It is formed in a mode in which the circumferential width is different between the one side and the other side, and the sum of the circumferential widths of the gaps on one side in the circumferential direction of each iron core portion and the circumferential width of the gaps on the other side in the circumferential direction And a cover that covers the first and second rotor parts including the magnet magnetic pole part and the iron core part, and the cover includes the first and second cover parts. The gist is to include a portion that enters the gap between the magnet magnetic pole part and the iron core part in the two rotor part .

  In the present invention, the magnet magnetic pole portion overlaps in the axial direction via the first rotor portion having one of the N-pole and S-pole polarities, and the first rotor portion and the magnetoresistive portion serving as a magnetic resistance. The magnet magnetic pole part is provided with a second rotor part that is arranged and has a different polarity from the first rotor part. As described above, the magnetic balance can be adjusted by providing the magnet magnetic pole portion capable of generating magnetic flux by changing the polarity between the first rotor portion and the second rotor portion. In addition, the magnet magnetic pole portion of the first rotor portion and the iron core portion of the second rotor portion having the same polarity as the magnet magnetic pole portion overlap in the axial direction, and the magnet magnetic pole portion of the second rotor portion and the magnet magnetic pole portion are the same. It arrange | positions in the aspect which overlaps with the said iron core part of a polar 1st rotor part in an axial direction. And the space | gap was formed in the aspect from which the circumferential direction width differs by the circumferential direction one side and the other side in the circumferential direction both sides of an iron core part, and added the circumferential width of the space | gap of the circumferential direction one side of each iron core part. The total sum is equal to the total sum of the circumferential widths of the gaps on the other circumferential side. As described above, since the gap is formed on the both sides in the circumferential direction of the iron core portion in a manner in which the circumferential width is different between the one side and the other side, the position and shape between the magnet magnetic pole portions of the iron core portion are substantially the same. Since they are different, the cogging torque in the entire rotor can be suppressed by shifting the peak of the cogging torque generated due to each iron core.

The gist of the invention described in claim 3 is that the rotor according to claim 1 or 2 is provided.
According to the present invention, it is possible to provide a motor capable of producing the same effect as that of the first or second aspect .

  Therefore, according to the above described invention, it is possible to provide a rotor and a motor that can suppress cogging torque.

It is a top view which shows schematic structure of the motor in embodiment. (A) (b) is a top view of the rotor in the same as the above. It is a perspective view of the rotor in the same as the above. It is a graph for demonstrating the cogging torque in a motor same as the above. It is a graph for demonstrating the torque ripple in a motor same as the above. (A) and (b) are the top views of the rotor in another example. It is a perspective view of the rotor in the same as the above. It is a graph for demonstrating the cogging torque in a motor same as the above. It is a graph for demonstrating the torque ripple in a motor same as the above. (A) and (b) are the top views of the rotor in another example. It is a perspective view of the rotor in the same as the above. (A) and (b) are the top views of the rotor in another example. It is a perspective view of the rotor in the same as the above. (A) and (b) are the top views of the rotor in another example. It is a perspective view of the rotor in the same as the above. It is a graph for demonstrating the cogging torque in a rotor same as the above. It is a graph for demonstrating the induced voltage in a rotor same as the above. It is a top view which shows schematic structure of the motor in another example. (A) is a top view of the 1st rotor part of a state which removed the magnet scattering prevention cover, (b) is a top view of the 2nd rotor part of a state which removed the magnet scattering prevention cover. It is a perspective view of the 1st and 2nd rotor part of a state which removed the magnet scattering prevention cover. It is a perspective view for demonstrating a magnet scattering prevention cover. (A) is a top view of the 1st rotor part of a state which removed the magnet scattering prevention cover, (b) is a top view of the 2nd rotor part of a state which removed the magnet scattering prevention cover. It is a perspective view of the 1st and 2nd rotor part of a state which removed the magnet scattering prevention cover. (A) is a top view of the 1st rotor part of a state which removed the magnet scattering prevention cover, (b) is a top view of the 2nd rotor part of a state which removed the magnet scattering prevention cover. It is a perspective view of the 1st and 2nd rotor part of a state which removed the magnet scattering prevention cover. (A) is a top view of the 1st rotor part of a state which removed the magnet scattering prevention cover, (b) is a top view of the 2nd rotor part of a state which removed the magnet scattering prevention cover. It is a perspective view of the 1st and 2nd rotor part of a state which removed the magnet scattering prevention cover. It is a perspective view for demonstrating the magnet scattering prevention cover in another example. It is a perspective view for demonstrating the magnet scattering prevention cover in another example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, the motor 10 includes an annular stator 11 disposed along an inner peripheral surface of a motor housing (not shown), and a rotor 21 disposed rotatably inside the stator 11. ing.

  The stator 11 has a plurality (12 in this embodiment) of teeth 12, and these teeth 12 are arranged in an annular shape, and a plurality of (12 in this embodiment) slots are formed between the teeth 12. ing. Each of the teeth 12 is wound with a winding 13 by concentrated winding, for example, and the wound winding 13 is energized with a three-phase alternating current.

As shown in FIGS. 1 to 3, the rotor 21 includes a rotating shaft 22 and first and second rotor portions 23 and 24 fixed to the rotating shaft 22.
The rotary shaft 22 is disposed so that the center axis L1 thereof coincides with the center axis of the annular stator 11, and both sides in the axial direction of the rotary shaft 22 are rotatably supported by bearings (not shown) provided in the motor housing. Yes. Therefore, the rotor 21 is supported inside the stator 11 so as to be rotatable about the central axis L1 as a rotation center.

As shown in FIGS. 2A and 3, the first rotor portion 23 has a substantially cylindrical rotor core 31 fixed to the rotary shaft 22.
The rotor core 31 is formed by laminating a plurality of core sheets 32 having substantially the same shape as shown in FIG. A plurality of magnet magnetic pole portions 33 that are radially opposed to the teeth 12 (see FIG. 1) of the stator 11 surrounding the rotor core 31 are formed on the outer periphery of the rotor core 31.

  More specifically, as shown in FIGS. 1 to 3, in the present embodiment, each magnet magnetic pole portion 33 is formed by embedding a substantially flat magnet 34 in the peripheral portion of the rotor core 31. Specifically, magnet housing holes 35 drilled in the axial direction are provided in the peripheral portion of the rotor core 31 at equal intervals in the circumferential direction (approximately 90 degrees in this embodiment). Each magnet magnetic pole portion 33 is formed by accommodating and fixing each magnet 34 in each magnet accommodating hole 35 in a manner orthogonal to the radial direction of the rotor core 31.

  Each magnet 34 is disposed so that the magnetic pole surface on the radially outer side of the rotor core 31 has the same polarity (for example, S pole). As a result, four magnet magnetic pole portions 33 having the same polarity (S pole) are formed in the first rotor portion 23 of the present embodiment at substantially equal intervals (approximately 90 ° intervals) along the circumferential direction. Yes.

  Each magnet magnetic pole portion 33 is formed with two gaps 36a and 36b at both ends in the circumferential direction. The air gaps 36a and 36b serve as magnetic resistances, so that an iron core portion 37 serving as a pseudo magnetic pole magnetically partitioned from the magnet magnetic pole portions 33 in the circumferential direction between the magnetic magnetic pole portions 33. Is formed.

  That is, the magnetic flux of each magnet magnetic pole portion 33 flows into each iron core portion 37 via the inside of the rotor core 31 so as to bypass each gap 36a, 36b formed at both ends in the circumferential direction. And when the magnetic flux passes through each iron core part 37 toward the outer side in the radial direction, each iron core part 37 is formed with a pseudo magnetic pole having a polarity different from that of the adjacent magnet magnetic pole part 33. Yes. That is, the 1st rotor part 23 of this embodiment is comprised as what is called a consequent pole type rotor.

  Moreover, the iron core part 37 of the rotor core 31 is formed in the shape inclined to one side of the circumferential direction, as shown to Fig.2 (a) and FIG. The iron core portion 37 is formed such that the gap 36a is located on one side in the circumferential direction (clockwise direction in FIG. 2) and the gap 36b is located on the other side in the circumferential direction (counterclockwise direction in FIG. 2). The outer side in the radial direction of the iron core portion 37 is formed so as to be inclined toward one side in the circumferential direction (clockwise direction in FIG. 2). At this time, the magnetic center of the iron core portion 37 is similarly inclined following the inclination angle of the iron core portion 37.

As shown in FIGS. 2B and 3, the second rotor portion 24 has a substantially cylindrical rotor core 41 fixed to the rotary shaft 22.
The rotor core 41 is formed by laminating a plurality of core sheets 42 having substantially the same shape as shown in FIG. A plurality of magnet magnetic pole portions 43 that are radially opposed to the teeth 12 (see FIG. 1) of the stator 11 surrounding the rotor core 41 are formed on the outer periphery of the rotor core 41.

  Specifically, as shown in FIGS. 1 to 3, in the present embodiment, each magnet magnetic pole portion 43 is formed by embedding a substantially flat magnet 44 in the peripheral portion of the rotor core 41. Specifically, magnet housing holes 45 drilled in the axial direction are provided at the peripheral edge of the rotor core 41 at equal intervals in the circumferential direction (approximately 90 degrees in this embodiment). Each magnet magnetic pole portion 43 is formed by housing and fixing each magnet 44 in each magnet housing hole 45 in a manner orthogonal to the radial direction of the rotor core 41.

  Each magnet 44 is disposed such that the magnetic pole surface on the radially outer side of the rotor core 41 has the same polarity as the magnet 34 (for example, N pole). Thereby, in the 2nd rotor part 24 of this embodiment, the four magnet magnetic pole parts 43 which have the same polarity (N pole) are formed at substantially equal intervals (substantially 90 degree intervals) along the circumferential direction. Yes.

  Each magnet magnetic pole portion 43 is formed with two gaps 46a and 46b at both ends in the circumferential direction. The air gaps 46a and 46b serve as magnetic resistances, so that an iron core 47 as a pseudo magnetic pole magnetically partitioned from the magnet magnetic poles 43 in the circumferential direction between the magnetic magnetic poles 43. Is formed.

  That is, the magnetic flux of each magnet magnetic pole portion 43 is transferred to each iron core portion 47 via the inside of the rotor core 41 so as to bypass each gap 46a, 46b formed at both ends in the circumferential direction, like the magnet magnetic pole portion 33. Inflow. And when the magnetic flux passes through each iron core part 47 toward the outer side in the radial direction, each iron core part 47 is formed with a pseudo magnetic pole having a polarity different from that of the adjacent magnet magnetic pole part 43. Yes. That is, the second rotor portion 24 of the present embodiment is configured as a so-called continuous pole type rotor.

  Moreover, the iron core part 47 of the rotor core 41 is formed in the shape inclined to the other of the circumferential direction, as shown in FIG.2 (b) and FIG. The iron core portion 47 is formed such that the gap 46a is located on the other circumferential side (counterclockwise direction in FIG. 2) and the gap 46b is located on one circumferential side (clockwise direction in FIG. 2). The outer side in the radial direction of the iron core portion 47 is formed so as to be inclined to the other circumferential side (counterclockwise direction in FIG. 2). At this time, the magnetic center of the iron core portion 47 is similarly inclined following the inclination angle of the iron core portion 47. Further, the same number (four) of the iron core portions 47 as the iron core portions 37 of the first rotor portion 23 are formed.

  Further, the first and second rotor portions 23 and 24 configured as described above include a magnet magnetic pole portion 33 of the first rotor portion 23 and an iron core portion 47 of the second rotor portion 24 having the same polarity as the magnet magnetic pole portion 33. Are arranged in such a manner as to overlap in the axial direction. Further, the magnet magnetic pole portion 43 of the second rotor portion 24 and the iron core portion 37 of the first rotor portion 23 having the same polarity as the magnet magnetic pole portion 43 are arranged so as to overlap in the axial direction.

  Further, between the first rotor portion 23 and the second rotor portion 24 in the axial direction, as shown in FIG. 3, each rotor portion 23, 24 has an axial gap K as a magnetoresistive portion having an axial length X1. Are arranged so as to overlap in the axial direction. The polarity (S pole) of the magnet magnetic pole part 33 of the first rotor part 23 and the polarity (N pole) of the magnet magnetic pole part 43 of the second rotor part 24 are configured to be different.

  Moreover, the 1st rotor part 23 and the 2nd rotor part 24 are made into the symmetrical shape reversed, for example with the circumferential direction center of each iron core part 37 and 47 as the starting point. In other words, for example, by reversing the positional relationship between the air gaps 36a and 36b adjacent in the circumferential direction to the iron core portion 37 of the first rotor portion 23, the same shape as the iron core portion 47 of the second rotor portion 24 is obtained. Therefore, the sum of the circumferential widths in the rotor cores 31 and 41 of the gaps 36a and 46b on one side in the circumferential direction of the iron core portions 37 and 47 and the circumferential width in the rotor cores 31 and 41 of the gaps 36b and 46a on the other side in the circumferential direction. Is set to be equal to the sum of.

Next, the operation of this embodiment will be described.
The motor 10 according to the present embodiment generates a rotating magnetic field that rotates the rotor 21 by energizing the winding 13 of the stator 11. Thereby, the rotor 21 is rotated.

  At this time, the rotor core 31 of the first rotor portion 23 includes an iron core portion 37 that is inclined to the other circumferential side, and the rotor core 41 of the second rotor portion 24 is opposite to the iron core portion 37 in the circumferential direction. And an iron core portion 47 inclined to one side in the circumferential direction. For this reason, the peak values of torque ripple and cogging torque generated due to the iron core portions 37 and 47 can be shifted as shown in FIGS. For this reason, it is possible to suppress the torque ripple and cogging torque in the entire rotor 21 by canceling out the cogging torques generated due to the iron core portions 37 and 47.

Next, characteristic effects of the present embodiment will be described.
(1) The magnet magnetic pole portion 33 is arranged in a manner overlapping with the first rotor portion 23 having the S pole and the axial gap K serving as a magnetic resistance between the first rotor portion 23 and the magnet magnetic pole portion 33 in the axial direction. The magnetic pole portion 43 includes a second rotor portion 24 having a polarity (N pole) different from that of the first rotor portion 23. Thus, the magnetic balance can be adjusted by providing the magnet magnetic pole portions 33 and 43 capable of generating magnetic flux by changing the polarity between the first rotor portion 23 and the second rotor portion 24. The magnet magnetic pole part 33 of the first rotor part 23 and the iron core part 47 of the second rotor part 24 having the same polarity as the magnet magnetic pole part 33 overlap in the axial direction, and the magnet magnetic pole part 43 of the second rotor part 24 The magnet magnetic pole part 43 and the iron core part 37 of the first rotor part 23 having the same polarity are arranged so as to overlap in the axial direction. The core part includes an iron core part 37 inclined to one side in the circumferential direction and an iron core part 47 inclined to the other side in the circumferential direction. As a result, the cogging torque in the rotor 21 as a whole can be suppressed by shifting the peak of the cogging torque between the iron core portion 37 inclined to the one circumferential side and the iron core portion 47 inclined to the other circumferential side.

  (2) The core portion 37 inclined to the one side in the circumferential direction is formed only on the first rotor portion 23, and the core portion 47 inclined to the other side in the circumferential direction is formed only on the second rotor portion 24. It becomes possible to simplify the shape of the rotor parts 23 and 24.

  (3) By adopting the axial gap K as the magnetoresistive portion between the first rotor portion 23 and the second rotor portion 24, it is possible to magnetically separate without arranging a member as a separate magnetoresistive portion. it can.

  (4) Since the rotor cores 31 and 41 are configured by laminating a plurality of core sheets 32 and 42 having the same shape, it is not necessary to use core sheets having different shapes, and therefore the core sheet is press-molded while suppressing the types of components. The increase in man-hours at the time can be suppressed.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the shapes of the first and second rotor portions are different from those in the first embodiment. Specifically, in the first embodiment, each of the first and second rotor portions 23 and 24 includes the iron core portions 37 and 47 having the same inclination direction, but in the present embodiment, one rotor portion is provided. Two types of iron cores having different inclination directions are provided. Therefore, this point will be described in detail, and the same components as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

  As shown in FIGS. 6 and 7, the rotor 21 of the present embodiment has a first rotor portion 51 and the first rotor portion 51 and the axial gap K as a magnetic resistance, and is overlapped in the axial direction. And a second rotor portion 52 to be disposed.

  As shown in FIG. 6A, each magnetic pole portion 55 of the first rotor portion 51 includes a first magnet magnetic pole portion 55a in which two gaps 56a are formed at both ends in the circumferential direction, and the gap 56a at both ends in the circumferential direction. And a second magnet magnetic pole portion 55b in which two gaps 56b having different circumferential widths are formed. For this reason, the iron core part located between the magnetic pole parts 55a and 55b in the circumferential direction includes a first iron core part 57a that is inclined in the other circumferential direction and a second iron core part 57b that is inclined in one circumferential direction. It consists of. In the first iron core portion 57a, the gap 56a is located on one side in the circumferential direction (clockwise direction in FIG. 6A), and the gap 56b is located on the other side in the circumferential direction (counterclockwise direction in FIG. 6A). The first core part 57a is formed in such a manner that it is inclined to the other side in the circumferential direction (counterclockwise direction in FIG. 6A). On the other hand, in the second iron core portion 57b, the air gap 56b is located on one side in the circumferential direction (clockwise direction in FIG. 6A), and the air gap 56a on the other side in the circumferential direction (counterclockwise direction in FIG. 6A). Is formed so that the second iron core portion 57b is inclined in one circumferential direction (clockwise direction in FIG. 6A). That is, the 1st rotor part 51 has the iron core part 57b which inclines to the circumferential direction one side, and the iron core part 57a which inclines to the circumferential direction other side on the same plane orthogonal to an axial direction.

  On the other hand, as shown in FIG. 6B, each magnet magnetic pole portion 58 of the second rotor portion 52 includes a first magnet magnetic pole portion 58a in which two gaps 59a are formed at both ends in the circumferential direction, and the above-mentioned at both ends in the circumferential direction. A second magnet magnetic pole part 58b is provided in which two gaps 59b having different circumferential widths from the gap 59a are formed. For this reason, the iron core part located between the magnetic pole parts 58a and 58b in the circumferential direction includes a first iron core part 60a having a shape inclined to the other in the circumferential direction and a second iron core part 60b having a shape inclined to one in the circumferential direction. It consists of. In the first iron core portion 60a, the gap 59a is located on one side in the circumferential direction (clockwise direction in FIG. 6B), and the gap 59b is located on the other side in the circumferential direction (counterclockwise direction in FIG. 6B). The first iron core portion 60a is formed in such a manner that it is inclined to the other circumferential side (counterclockwise direction in FIG. 6B). On the other hand, in the second iron core portion 60b, the gap 59b is located on one side in the circumferential direction (clockwise direction in FIG. 6B), and the gap 59a is located on the other side in the circumferential direction (counterclockwise direction in FIG. 6B). Is formed so that the second iron core portion 60b is inclined in one circumferential direction (clockwise direction in FIG. 6B). That is, the 2nd rotor part 52 has the iron core part 60b which inclines to the circumferential direction one side, and the iron core part 60a which inclines to the circumferential direction other side on the same plane orthogonal to an axial direction.

  Further, the first and second rotor portions 51 and 52 configured as described above include the first magnet magnetic pole portion 55a of the first rotor portion 51 and the second rotor portion 52 of the same polarity as the magnet magnetic pole portion 55a. It arrange | positions in the aspect which 1 iron core part 60a overlaps in an axial direction. The 2nd magnet magnetic pole part 55b of the 1st rotor part 51 and the 2nd core part 60b of the 2nd rotor part 52 of the same polarity as this magnet magnetic pole part 55b are arrange | positioned in the aspect which overlaps in an axial direction. Further, the first magnet magnetic pole portion 58a of the second rotor portion 52 and the first iron core portion 57a of the first rotor portion 51 having the same polarity as the magnet magnetic pole portion 58a are arranged so as to overlap in the axial direction. The 2nd magnet magnetic pole part 58b of the 2nd rotor part 52 and the 2nd iron core part 57b of the 1st rotor part 51 of the same polarity as this magnet magnetic pole part 58b are arrange | positioned in the aspect which overlaps.

  Further, between the first rotor portion 51 and the second rotor portion 52 in the axial direction, as shown in FIG. 7, each rotor portion 51, 52 has an axial gap K as a magnetoresistive portion having an axial length X1. Are arranged so as to overlap in the axial direction. The polarities (eg, S poles) of the magnet magnetic pole portions 55a and 55b of the first rotor portion 51 are configured to be different from the polarities (eg, N poles) of the magnet magnetic pole portions 58a and 58b of the second rotor portion 52. .

Next, the operation of this embodiment will be described.
In the motor 10 of the present embodiment, the first rotor portion 51 includes an iron core portion 57a that is inclined to the other circumferential side and an iron core portion 57b that is inclined to the one circumferential side, and the second rotor portion 52 is a circumferential direction. An iron core portion 60a inclined to the other side and an iron core portion 60b inclined to the one side in the circumferential direction are provided. For this reason, the peak values of torque ripple and cogging torque generated due to the respective iron core portions 57a, 57b, 60a, 60b can be shifted as shown in FIGS. For this reason, the torque ripples and cogging torque in the entire rotor 21 can be suppressed by canceling out the cogging torques generated due to the respective iron core portions 57a, 57b, 60a, 60b.

As described above, the second embodiment has the following effects in addition to the same effects as (1), (3), and (4) of the first embodiment.
(5) The first and second rotor portions 51 and 52 are composed of iron core portions 57b and 60b inclined on one side in the circumferential direction and iron core portions 57a and 60a inclined on the other side in the circumferential direction on the same plane orthogonal to the axial direction. The rotor portions 51 and 52 can be configured without using a plurality of types of rotor cores in the rotor portions 51 and 52.

Each embodiment of the present invention may be modified as follows.
-It is not restricted to said each embodiment, For example, you may employ | adopt the 1st and 2nd rotor part of the following structures (A)-(C).

(Configuration A)
As shown in FIG. 10, the first rotor portion 71 includes a first iron core portion 71a that is inclined to one side in the circumferential direction, and a second iron core portion 71b that is inclined to the other side in the circumferential direction, and the circumference of the first iron core portion 71a. The side opposite to the direction 180 degrees is configured to be the second iron core portion 71b. And the 2nd rotor part 72 is equipped with the 1st iron core part 72a which inclines to the circumferential direction one side, and the 2nd iron core part 72b which inclines to the circumferential direction other side, and the other side of the 1st iron core part 72a is 180 degrees in the circumferential direction. It is comprised so that it may become the 2nd iron core part 72b. The first and second rotor portions 71 and 72 are formed by the axis of the first magnet magnetic pole portion 71c of the first rotor portion 71 and the first iron core portion 72a of the second rotor portion 72 having the same polarity as the magnet magnetic pole portion 71c. Arranged in an overlapping manner in the direction. The second magnet magnetic pole part 71d of the first rotor part 71 and the second iron core part 72b of the second rotor part 72 having the same polarity as the magnet magnetic pole part 71d are arranged in an overlapping manner in the axial direction. Further, the first magnet magnetic pole portion 72c of the second rotor portion 72 and the first iron core portion 71a of the first rotor portion 71 having the same polarity as the magnet magnetic pole portion 72c are arranged so as to overlap in the axial direction. The second magnet magnetic pole part 72d of the second rotor part 72 and the second iron core part 71b of the first rotor part 71 having the same polarity as the magnet magnetic pole part 72d are arranged in an overlapping manner in the axial direction. And between the axial direction of the 1st rotor part 71 and the 2nd rotor part 72, as shown in FIG. 11, it has the axial direction space | gap K as a magnetoresistive part of the axial direction length X1, and each rotor part 71,72. Are arranged so as to overlap in the axial direction.

(Configuration B)
As shown in FIG. 12, the first rotor portion 81 includes a first iron core portion 81a inclined to one side in the circumferential direction and a second iron core portion 81b inclined to the other side in the circumferential direction, and the circumference of the first iron core portion 81a. The side opposite to the direction 180 degrees is configured so that the first iron core portion 81a having the same shape and the second iron core portion 81b opposite to the circumferential direction 180 degrees are the second iron core portion 81b having the same shape. And the 2nd rotor part 82 is provided with the 1st iron core part 82a which inclines to the circumferential direction one side, and the 2nd iron core part 82b which inclines to the other circumferential direction, and the other side of the 1st iron core part 82a in the circumferential direction is 180 degree | times. It is comprised so that it may become the 2nd iron core part 82b. The first and second rotor portions 81 and 82 are formed by shafts of the first magnet magnetic pole portion 81c of the first rotor portion 81 and the first iron core portion 82a of the second rotor portion 82 having the same polarity as the magnet magnetic pole portion 81c. Arranged in an overlapping manner in the direction. The second magnet magnetic pole part 81d of the first rotor part 81 and the second iron core part 82b of the second rotor part 82 having the same polarity as the magnet magnetic pole part 81d are arranged so as to overlap in the axial direction. Further, the first magnet magnetic pole part 82c of the second rotor part 82 and the first iron core part 81a of the first rotor part 81 having the same polarity as the magnet magnetic pole part 82c are arranged so as to overlap in the axial direction. The second magnet magnetic pole part 82d of the second rotor part 82 and the second iron core part 71b of the first rotor part 71 having the same polarity as the magnet magnetic pole part 82d are arranged so as to overlap in the axial direction. And between the axial direction of the 1st rotor part 81 and the 2nd rotor part 82, as shown in FIG. 13, it has the axial direction space | gap K as a magnetoresistive part of axial direction length X1, and each rotor part 81,82. Are arranged so as to overlap in the axial direction.

Even if it is the said structure A and the structure B, there can exist an effect similar to the effect of the said 1st Embodiment (1).
(Configuration C)
As shown in FIG. 15, the rotor 100 having this configuration includes a rotating shaft 22 and first and second rotor portions 101 and 102 fixed to the rotating shaft 22.

As shown in FIG. 15, the first rotor portion 101 and the second rotor portion 102 are fixed to the rotary shaft 22 so as to have an axial gap K as a magnetoresistive portion having an axial length X1.
As shown in FIG. 14A, the first rotor portion 101 has a substantially cylindrical rotor core 111 fixed to the rotary shaft 22.

As shown in FIG. 15, the rotor core 111 is configured by stacking a plurality of core sheets 112 having substantially the same shape.
As shown in FIG. 14A, the outer periphery of the rotor core 111 includes a magnet magnetic pole portion 113 and an iron core portion 114.

  As shown in FIG. 14A, four magnet magnetic pole portions 113 are formed at intervals of about 90 degrees in the circumferential direction. Each magnet magnetic pole portion 113 is formed with a magnet accommodation hole 35 into which the magnet 34 can be inserted. In addition, each magnet magnetic pole portion 113 is formed to have a first outer surface 113a that is curved outwardly in the radial direction, and a concave concave shape radially inward from the first outer surface 113a. And a second outer surface 113b. The second outer surface 113b is located radially inward of a circle C passing through the first outer surface 113a on one circumferential side (clockwise direction in the drawing) of the first outer surface 113a. That is, the gap 115 located on one side in the circumferential direction of the magnet magnetic pole part 113 has a gap extension part 115a and has a larger circumferential width and volume than the gap 116 located on the other circumferential side of the magnet magnetic pole part 113. ing.

As shown in FIG. 14A, the iron core portion 114 is formed to have a fan shape when the outer surface 114a of the iron core portion 114 has a curved shape and the iron core portion 114 is viewed in the axial direction (plan view). .
As shown in FIG. 14B, the second rotor portion 102 has a substantially cylindrical rotor core 121 fixed to the rotary shaft 22.

As shown in FIG. 15, the rotor core 121 is configured by laminating a plurality of core sheets 122 having substantially the same shape.
As shown in FIG. 14B, a magnet magnetic pole portion 123 and an iron core portion 124 are provided on the outer peripheral portion of the rotor core 121.

  As shown in FIG. 14B, four magnet magnetic pole portions 123 are formed at intervals of about 90 degrees in the circumferential direction. Each magnet magnetic pole part 123 is formed with a magnet accommodation hole 45 into which the magnet 44 can be inserted.

  As shown in FIG. 14B, four iron core portions 124 are formed at intervals of about 90 degrees in the circumferential direction. The iron core portion 124 has a first outer surface 124a that is curved outwardly in the radial direction, and a second outer surface that is formed so as to have a curved concave shape radially inward from the first outer surface 124a. A surface 124b. The second outer surface 124b is located radially inward from the circle C passing through the first outer surface 124a on the other circumferential side (counterclockwise direction in the drawing) of the first outer surface 124a, that is, the iron core portion 124. The gap 125 located on the other side in the circumferential direction has a gap extension part 125 a and has a larger circumferential width and volume than the gap 126 located on the circumferential position side of the iron core part 124.

  The first rotor portion 101 and the second rotor portion 102 configured as described above, for example, the same number of the core sheets 112 and 122 are stacked and fixed to the rotating shaft 22 to form a rotor. At this time, the core portion 114 of the first rotor portion 101 (rotor core 111) and the magnetic pole portion 123 of the second rotor portion 102 (rotor core 121) are laminated so as to overlap in the axial direction, and the second rotor portion 102 (rotor core) 121) and the magnetic pole portion 113 of the first rotor portion 101 (rotor core 111) are laminated so as to overlap in the axial direction. With this configuration, the cogging torque can be reduced as shown in FIG. Further, as shown in FIG. 17, the induced voltage pitch can be equalized. In the above embodiment, the gap K is used as the magnetoresistive portion. However, a member that can suppress the magnetic movement between the first rotor portion 71 and the second rotor portion 72 in the axial direction is arranged as the magnetoresistive portion. It may be adopted.

In each of the above embodiments, the core sheets 32 and 42 are stacked to form the rotor cores 31 and 41. However, the present invention is not limited to this.
In each of the above embodiments and each of the above modifications, the magnets 34 and 44 are configured as IPM type rotors that are accommodated in the magnet accommodation holes 35 and 45. However, the magnets 34 and 44 are disposed on the outer peripheral surface of the rotor cores 31 and 41. You may comprise as an SPM type rotor. Below, an example of the motor provided with the rotor of SPM structure is demonstrated.

(First example of SPM structure)
As shown in FIG. 18, the motor 150 includes a substantially annular stator 11 disposed along an inner peripheral surface of a motor housing (not shown), and a rotor 151 disposed rotatably inside the stator 11. I have. Since the stator 11 has the same configuration as the stator 11 of the first embodiment, a detailed description thereof is omitted.

  As shown in FIGS. 19A and 19B, the rotor 151 includes a rotating shaft 22, first and second rotor portions 152 and 153 fixed to the rotating shaft 22, and diameters of the rotor portions 152 and 153. A magnet scattering prevention cover 154 that covers the rotor portions 152 and 153 on the outer side in the direction is provided.

  The first rotor portion 152 includes a substantially cylindrical rotor core 161 fixed to the rotating shaft 22 and a magnet 162 that constitutes a magnet magnetic pole portion provided on the radially outer side of the rotor core 161.

  The rotor core 161 of the first rotor portion 152 is formed by stacking a plurality of core sheets 163 having substantially the same shape as shown in FIG. Further, the rotor core 161 of the first rotor portion 152 includes a plurality of iron core portions 164 that receive the magnetism of the magnet 162 and function as one magnetic pole. The iron core portion 164 is formed so as to extend outward in the radial direction so that the outer surface 164a on the outer side in the radial direction is curved. The iron core part 164 has a shape inclined to one side in the circumferential direction. In addition, the rotor core 161 of the first rotor portion 152 includes a mounting surface 165 between the iron core portions 164. The mounting surface 165 has a planar shape extending in a direction orthogonal to the radial direction when viewed in the axial direction.

  On the other hand, the second rotor portion 153 includes a substantially cylindrical rotor core 171 fixed to the rotary shaft 22 and a magnet 172 provided on the radially outer side of the rotor core 171.

  The rotor core 171 of the second rotor portion 153 is formed by stacking a plurality of core sheets 173 having substantially the same shape as shown in FIG. In addition, the rotor core 171 of the second rotor portion 153 includes a plurality of iron core portions 174 that receive the magnetism of the magnet 172 and function as one magnetic pole. The iron core portion 174 is formed such that the outer surface 174a on the outer side in the radial direction is curved and extends outward in the radial direction. The iron core portion 174 has a shape inclined to the other side in the circumferential direction. In addition, the rotor core 171 of the second rotor portion 153 includes a mounting surface 175 between the iron core portions 174. The mounting surface 175 has a planar shape extending in a direction orthogonal to the radial direction when viewed in the axial direction.

  Each of the magnets 162 and 172 is fixed to the mounting surfaces 165 and 175 of the rotor cores 161 and 171 of the first and second rotor portions 152 and 153, and the planar flat portions 162a and 172a are located at radially inner positions. And curved outer surfaces 162b and 172b are provided at radially outer positions. Further, gaps 166, 167, 176, 177 are formed between the magnets 162, 172 and the iron core portions 164, 174 constituting the magnetic pole part.

  As shown in FIG. 19A, the gap 166 formed on one side in the circumferential direction of the iron core part 164 of the first rotor portion 152 is more circumferential than the gap 167 formed on the other side in the circumferential direction of the iron core part 164. The direction width and the volume thereof are reduced. As shown in FIG. 19B, the gap 176 formed on one side in the circumferential direction of the iron core part 174 of the second rotor portion 153 is more circumferential than the gap 177 formed on the other side in the circumferential direction of the iron core part 174. The direction width and the volume thereof are increased. Further, the gap 166 formed on one side in the circumferential direction of the iron core part 164 of the first rotor portion 152 is the same as the gap 177 formed on the other side in the circumferential direction of the iron core part 174 of the second rotor portion 153 and the circumferential width and volume. Are substantially the same. On the other hand, the gap 167 formed on the other circumferential side of the iron core 164 of the first rotor portion 152 is the same as the gap 176 formed on one circumferential side of the iron core 174 of the second rotor portion 153 and the circumferential width and volume. Are substantially the same.

  As shown in FIGS. 18 and 21, the magnet scattering prevention cover 154 covers the first and second rotor portions 152 and 153 and has a substantially cylindrical shape. As shown in FIGS. 19A and 21, the magnet scattering prevention cover 154 enters one of the gaps 166 and 167 between the iron core part 164 and the magnet 162 in the first rotor part 152 and abuts in the circumferential direction. A contact recess 154a is provided. Further, as shown in FIGS. 19B and 21, the anti-scatter cover 154 enters one of the gaps 176 and 177 between the iron core part 174 and the magnet 172 in the second rotor part 153 and contacts the circumferential direction. A contact recess 154b is provided. A total of eight contact recesses 154a and 154b are formed, four in the circumferential direction. The first and second rotors include the contact recesses 154a and 154b of the magnet scattering prevention cover 154, the inner peripheral surface 154c of the magnet scattering prevention cover 154, and the mounting surfaces 165 and 175 of the rotor cores 161 and 171, respectively. The magnets 162 and 172 of the portions 152 and 153 are sandwiched so that movement in the radial direction and the circumferential direction is suppressed.

  In the first example, the rotor 151 includes the iron core portion 164 inclined to the one side in the circumferential direction in the first rotor portion 152, and the iron core portion 174 inclined to the other side in the circumferential direction in the second rotor portion 153. Although it was set as the structure, it is not restricted to this, You may change suitably as follows.

(Second example of SPM structure)
As shown in FIG. 22 (a), the first rotor portion 181 includes an iron core portion 181a inclined on one side in the circumferential direction and an iron core portion 181b inclined on the other side in the circumferential direction on the same plane orthogonal to the axial direction. The opposite side of the iron core part 181a in the circumferential direction 180 degrees is the same shape of the iron core part 181a, and the opposite side of the iron core part 181b in the circumferential direction 180 degrees is the same shape of the iron core part 181b. As shown in FIG. 22 (a), the iron core portion 181a has a gap 191 located on one side in the circumferential direction (clockwise direction in the figure) and the gap on the other side in the circumferential direction (counterclockwise direction in the figure). A gap 192 having a wider width in the circumferential direction than 191 is formed, and the iron core portion 181a is formed so as to be inclined toward one side in the circumferential direction (counterclockwise direction in the figure). As shown in FIG. 22 (a), the iron core portion 181b has a gap 193 located on one side in the circumferential direction (clockwise direction in the figure) and the gap on the other side in the circumferential direction (counterclockwise direction in the figure). It is formed so that the gap 194 having a narrower circumferential width than that of 193 is located, and the iron core portion 181b is formed in such a manner that it is inclined to the other circumferential side (clockwise direction in the figure). The air gap 193 has substantially the same circumferential width and volume as the air gap 192, and the air gap 194 has substantially the same circumferential width and volume as the air gap 191.

  As shown in FIG. 22 (b), the second rotor portion 182 includes an iron core portion 182a inclined to one side in the circumferential direction and an iron core portion 182b inclined to the other side in the circumferential direction on the same plane orthogonal to the axial direction. The opposite side of the iron core part 182a in the circumferential direction 180 degrees is the same shape of the iron core part 182a, and the opposite side of the iron core part 182b in the circumferential direction 180 degrees is the same shape of the iron core part 182b. As shown in FIG. 22B, the iron core portion 182a has a gap 195 located on one side in the circumferential direction (clockwise direction in the figure) and the gap on the other side in the circumferential direction (counterclockwise direction in the figure). A gap 196 having a wider circumferential width than that of 195 is formed, and the iron core portion 182a is formed to be inclined to one side in the circumferential direction (counterclockwise direction in the figure). As shown in FIG. 22B, the iron core portion 182b has a gap 197 positioned on one side in the circumferential direction (clockwise direction in the figure) and the gap 197 on the other side in the circumferential direction (counterclockwise direction in the figure). The gap 198 having a narrower circumferential width is positioned so that the iron core portion 182b is inclined in one circumferential direction (clockwise direction in the drawing). The gap 198 has substantially the same circumferential width and volume as the gap 195, and the gap 197 has substantially the same circumferential width and volume as the gap 196.

  Further, the first and second rotor parts 181 and 182 configured as described above are opposite to each other by 180 degrees in the circumferential direction in the four magnets 162 of the first rotor part 181 as shown in FIGS. And the magnet 162 and the iron core portion 182a of the second rotor portion 182 having the same polarity as the magnet 162 are arranged so as to overlap in the axial direction. The remaining magnets 162 of the magnets 162 of the first rotor part 181 and the iron core part 182b of the second rotor part 182 having the same polarity as the magnets 162 are arranged so as to overlap in the axial direction. Also, the magnet 172 located on the opposite side of the four magnets 172 of the second rotor portion 182 in the circumferential direction 180 degrees and the iron core portion 181a of the first rotor portion 181 having the same polarity as the magnet 172 overlap in the axial direction. Arranged in a manner. The remaining magnets 172 of the magnets 172 of the second rotor part 182 and the iron core part 181b of the first rotor part 181 having the same polarity as the magnets 172 are arranged so as to overlap in the axial direction.

  Further, between the first rotor portion 181 and the second rotor portion 182 in the axial direction, as shown in FIG. 23, each rotor portion 181 and 182 has an axial gap K as a magnetoresistive portion having an axial length X1. Are arranged so as to overlap in the axial direction. And the polarity (for example, S pole) of the magnet 162 of the 1st rotor part 181 and the polarity (for example, N pole) of the magnet 172 of the 2nd rotor part 182 are comprised so that it may differ.

(Third example of SPM structure)
As shown in FIG. 24A, the first rotor portion 201 includes an iron core portion 201a that is inclined to one side in the circumferential direction and an iron core portion 201b that is inclined to the other side in the circumferential direction, and the circumferential direction of the iron core portion 201a is 180 degrees. It is comprised so that the other side may become the iron core part 201b. As shown in FIG. 24 (b), the second rotor portion 202 includes an iron core portion 202a that is inclined to one side in the circumferential direction and a second iron core portion 202b that is inclined to the other side in the circumferential direction, and the circumferential direction of the iron core portion 202a. The opposite side of 180 degrees is configured to be the iron core portion 202b.

  As shown in FIGS. 24 and 25, the first and second rotor portions 201 and 202 include two magnets 162 out of the four magnets 162 of the first rotor portion 201, and second magnets having the same polarity as the magnet 162. It arrange | positions in the aspect which overlaps with the iron core part 202a of the rotor part 202 in an axial direction. The remaining magnets 162 of the magnets 162 of the first rotor part 201 and the iron core part 202b of the second rotor part 202 having the same polarity as the magnets 162 are arranged so as to overlap in the axial direction. Further, two magnets 172 out of the four magnets 172 of the second rotor portion 202 and the iron core portion 201a of the first rotor portion 201 having the same polarity as the magnet 172 are arranged in an overlapping manner in the axial direction. The remaining magnet 172 of the second rotor part 202 and the iron core part 201b of the first rotor part 201 having the same polarity as the magnet 172 are arranged so as to overlap in the axial direction. And between the axial direction of the 1st rotor part 201 and the 2nd rotor part 202, as shown in FIG. 25, it has the axial direction space | gap K as a magnetoresistive part of the axial direction length X1, and each rotor part 201,202. Are arranged so as to overlap in the axial direction.

(Fourth example of SPM structure)
As shown in FIG. 26 (a), the first rotor portion 211 includes an iron core portion 211a inclined to one side in the circumferential direction and an iron core portion 211b inclined to the other side in the circumferential direction, and the circumferential direction of the iron core portion 211a is 180 degrees. The opposite side is configured to be the same shape iron core portion 211a, and the opposite side of the iron core portion 211b 180 degrees in the circumferential direction is the same shape iron core portion 211b. As shown in FIG. 26 (b), the second rotor portion 212 includes an iron core portion 212a inclined to one side in the circumferential direction and an iron core portion 212b inclined to the other side in the circumferential direction, and the circumferential direction of the iron core portion 212a is 180 degrees. It is comprised so that the other side may become the iron core part 212b.

  As shown in FIGS. 26 and 27, the first and second rotor portions 211 and 212 include two magnets 162 of the four magnets 162 of the first rotor portion 211, and a second rotor having the same polarity as the magnet 162. It arrange | positions in the aspect which overlaps with the iron core part 212a of the part 212 in an axial direction. The remaining magnets 162 of the magnets 162 of the first rotor part 211 and the iron core part 212b of the second rotor part 212 having the same polarity as the magnets 162 are arranged so as to overlap in the axial direction. Further, the magnet 172 located on the opposite side of the four magnets 172 of the second rotor portion 212 in the circumferential direction 180 degrees overlaps the iron core portion 211a of the first rotor portion 211 having the same polarity as the magnet 172 in the axial direction. Arranged in a manner. The remaining magnet 172 of the second rotor part 212 and the iron core part 211b of the first rotor part 211 having the same polarity as the magnet 172 are arranged so as to overlap in the axial direction. And between the axial direction of the 1st rotor part 211 and the 2nd rotor part 212, as shown in FIG. 27, it has the axial space | gap K as a magnetoresistive part of the axial direction length X1, and each rotor part 211,212. Are arranged so as to overlap in the axial direction.

  Although the magnet scattering prevention cover 154 has a simple cylindrical shape in the configurations of the first to fourth examples, the present invention is not limited to this. For example, as shown in FIG. 28, a cutout portion 154d that penetrates in the radial direction and is cut out in the axial direction may be formed in a part of the magnet scattering prevention cover 154. Further, in order to individually correspond to the first rotor portion and the second rotor portion, for example, as shown in FIG. 29, a configuration using separate scattering prevention covers 155 and 156 may be adopted.

  DESCRIPTION OF SYMBOLS 10 ... Motor, 21, 100, 151 ... Rotor, 22 ... Rotating shaft, 23, 51, 71, 81, 101, 152, 153, 181, 201, 211 ... First rotor part, 31, 41, 111, 121, 161,171 ... rotor core, 24, 52, 72, 82, 102, 153, 182, 202, 212 ... second rotor part, 33, 43, 55, 55a, 55b, 58, 58a, 58b, 71c, 71d, 72c , 72d, 81c, 81d, 82c, 82d, 113, 123 ... magnet magnetic pole part, 34, 44 ... magnet, 37, 47, 57a, 57b, 60a, 60b, 114, 124, 164, 174, 181a, 181b, 182a , 182b, 201a, 201b, 202a, 202b, 211a, 211b, 212a, 212b ... iron core part, 36a 36b, 46a, 46b, 56a, 56b, 59a, 59b, 115, 116, 125, 126, 166, 167, 176, 177, 191 to 198 ... gap, 162, 172 ... magnets constituting the magnetic pole part, K ... An axial gap as a magnetoresistive part.

Claims (3)

A plurality of magnets of one magnetic pole are arranged in the circumferential direction of the rotor core to form a magnet magnetic pole part, and an iron core part formed on the rotor core is between each magnet magnetic pole part at each boundary part with the magnet magnetic pole part. A rotor arranged with a gap and configured to cause the iron core to function as the other magnetic pole;
The magnet magnetic pole portion is arranged in a manner overlapping in the axial direction via a first rotor portion having one of the N pole and S pole, and a magnetic resistance portion serving as a magnetic resistance with the first rotor portion. And the magnet magnetic pole part includes a second rotor part having a different polarity from the first rotor part,
The magnet magnetic pole part of the first rotor part and the iron core part of the second rotor part having the same polarity as the magnet magnetic pole part overlap in the axial direction, and the magnet magnetic pole part of the second rotor part and the magnet magnetic pole part have the same polarity. Arranged in a manner that the core portion of the first rotor portion overlaps in the axial direction,
The iron core portion includes an iron core portion inclined on one side in the circumferential direction, and an iron core portion inclined on the other side in the circumferential direction .
The first and second rotor portions include an iron core portion inclined to one side in the circumferential direction and an iron core portion inclined to the other side in the circumferential direction on the same plane orthogonal to the axial direction,
The first rotor portion is disposed on the opposite side across the axis of the rotor of the iron core portion inclined to the one side in the circumferential direction, and the iron core portion inclined to the one side in the circumferential direction is inclined to the other side in the circumferential direction. On the opposite side across the axis of the rotor of the iron core, an iron core that is inclined to the other circumferential side is arranged,
The second rotor portion, on the opposite side across the axis of the one circumferential direction of the inclined core portion on the side of the rotor, the rotor, characterized in Rukoto core portion inclined in the other circumferential side are arranged. A plurality of magnets of one magnetic pole are arranged in the circumferential direction of the rotor core to form a magnet magnetic pole part, and an iron core part formed on the rotor core is between each magnet magnetic pole part at each boundary part with the magnet magnetic pole part. A rotor arranged with a gap and configured to cause the iron core to function as the other magnetic pole;
The magnet magnetic pole portion is arranged in such a manner as to overlap in the axial direction via a first rotor portion having one of the N-pole and S-pole polarities, and a magnetic resistance portion serving as a magnetic resistance with the first rotor portion. And the magnet magnetic pole part comprises a second rotor part having a different polarity from the first rotor part,
The magnet magnetic pole part of the first rotor part and the iron core part of the second rotor part having the same polarity as the magnet magnetic pole part overlap in the axial direction, and the magnet magnetic pole part of the second rotor part and the magnet magnetic pole part have the same polarity. Arranged in a manner that the core portion of the first rotor portion overlaps in the axial direction,
The gap is formed on both sides in the circumferential direction of the iron core portion in a form having different circumferential widths on one side and the other side in the circumferential direction, and the circumferential widths of the gaps on one circumferential side of the iron core portions are added together. The total sum and the sum total of the circumferential widths of the gaps on the other side in the circumferential direction are equal to each other.
A cover for covering the first and second rotor parts including the magnet magnetic pole part and the iron core part;
The said cover contains the part which enters into the space | gap between the magnet magnetic pole part and iron core part in the said 1st and 2nd rotor part . Motor comprising the rotor according to claim 1 or 2.