JP2019154140A - Rotary electric machine - Google Patents

Abstract

To provide a rotary electric machine capable of rotating two rotors with different speeds.SOLUTION: A rotary electrical machine 10a includes: a stator 12 having an iron core group 20 composed of a plurality of stator iron cores 18 arranged in an annular shape, and a winding 24 inserted into a slot 22 between each of the stator cores 18 and wound around the stator core 18; an inner circumferential side rotor 14 that is rotatably held on an inner circumferential side of the stator 12 and in which a plurality of permanent magnets 54 are arranged along the circumferential direction; and an outer peripheral side rotor 16 that is rotatably held on an outer peripheral side of the stator 12 and in which a plurality of permanent magnets 64 are arranged along the circumferential direction. The inner circumferential side rotor 14 and the outer circumferential side rotor 16 are coupled to different rotating shafts. A plurality of permanent magnets 28, 36 are arranged along the circumferential direction on the inner peripheral side and the outer peripheral side of the iron core group 20, and the number of pole pairs formed by the permanent magnets 54 of the inner circumferential side rotor 14 is different from the number of pole pairs formed by the permanent magnets 64 of the outer circumferential side rotor 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electrical machine including a plurality of rotors.

  Conventionally, a stator that is formed by winding a winding around a stator core, an inner rotor that is rotatably held on the inner periphery of the stator, and a rotor that is rotatably held on the outer periphery of the stator. A rotating electrical machine including an outer peripheral rotor is known.

  In Patent Document 1, a stator in which a winding is wound around a stator core in the form of a toroidal winding, and an inner peripheral side in which a plurality of permanent magnets are arranged and rotatably held on the inner peripheral side of the stator A dual rotor motor comprising: a rotor; and an outer rotor on which an equal number of permanent magnets are disposed on the inner rotor and are rotatably held on the outer periphery of the stator. It is disclosed. In this motor, the inner circumferential rotor and the outer circumferential rotor are connected to the same rotating shaft.

JP 2010-98802 A

  In a motor like patent document 1, an inner peripheral side rotor and an outer peripheral side rotor rotate at the same speed, and only one torque output is obtained. Even if the inner circumferential rotor and the outer circumferential rotor are connected to different rotating shafts and rotated separately, they rotate at the same speed. In order to obtain two rotational outputs (torque outputs) with different rotational speeds, two motors or rotating electrical machines with only one rotor are prepared, and the currents that flow to their respective windings are supplied by separate inverters. It is necessary to.

  An object of the present invention is to provide two outputs (torque output) by rotating two rotors at different speeds by supplying current to a winding by one inverter in a rotating electric machine including two rotors. It is to be obtained.

  The rotating electrical machine according to the present invention employs the following means in order to achieve the above object.

  A rotating electrical machine according to the present invention is inserted into a slot between a plurality of stator cores arranged in an annular shape and a stator core, and is wound around the stator core. A stator having a plurality of windings, an inner rotor on which a plurality of permanent magnets are arranged along the circumferential direction and rotatably held on the inner peripheral side of the stator, and an outer periphery of the stator And an outer peripheral rotor on which a plurality of permanent magnets are arranged along the circumferential direction, and the inner peripheral rotor and the outer peripheral rotor are connected to different rotating shafts. A plurality of permanent magnets are disposed along the circumferential direction on the inner peripheral side and the outer peripheral side of the iron core group, and the pole is formed by the permanent magnets of the inner peripheral rotor. The gist is that the logarithm and the number of pole pairs formed by the permanent magnets of the outer rotor are different.

  In one aspect of the present invention, it is preferable that the winding wound around the stator iron core is a three-phase winding, and the number of the stator iron cores is a multiple of three.

  In one aspect of the present invention, the number of pole pairs formed by permanent magnets of the inner circumferential rotor, the number of pole pairs formed by passing current through the windings, and the permanent inner circumference side of the iron core group The number of pole pairs formed by magnets has the magnetic pole relationship of a vernier motor, the number of pole pairs formed by permanent magnets of the outer rotor, and the number of pole pairs formed by passing current through the windings. The number of pole pairs formed by the permanent magnets on the outer peripheral side of the iron core group preferably has a magnetic pole relationship of a vernier motor.

  In one aspect of the present invention, the number of pole pairs formed by the permanent magnets on the inner peripheral side of the iron core group is equal to the number of pole pairs formed by the permanent magnets of the inner peripheral rotor, and a current is passed through the windings. The number of pole pairs formed by the permanent magnets on the outer peripheral side of the iron core group is the number of pole pairs formed by the permanent magnets of the outer rotor, The number is preferably the sum of the number of pole pairs formed by passing a current through the winding.

  In one aspect of the present invention, the number of pole pairs formed by the permanent magnets on the inner peripheral side of the iron core group is equal to the number of pole pairs formed by the permanent magnets of the inner peripheral rotor, and a current is passed through the windings. The number of pole pairs formed by the permanent magnets on the outer peripheral side of the iron core group is the number of pole pairs formed by the permanent magnets of the outer rotor, The number is preferably a number obtained by subtracting the number of pole pairs formed by passing a current through the winding.

  According to the present invention, when a current is supplied to the winding by one inverter, the inner circumferential rotor and the outer circumferential rotor can rotate at different speeds to obtain two torque outputs.

It is radial direction sectional drawing of a rotary electric machine. It is an axial sectional view of a rotating electrical machine. It is a figure which shows the star connection which is an example of the connection of a three-phase winding. It is a figure which shows a magnetic flux line (FEM analysis result) when it supplies with electricity to the three-phase winding of a rotary electric machine. It is a figure which shows an example of the torque of the inner peripheral side rotor and outer peripheral side rotor of a rotary electric machine. FIG. 6 is a radial cross-sectional view of a rotating electrical machine according to Embodiment 2. It is a figure which shows the magnetic flux line (FEM analysis result) when it supplies with electricity to the three-phase winding of the rotary electric machine in Embodiment 2. It is a figure which shows an example of the torque of the inner peripheral side rotor and outer peripheral side rotor of the rotary electric machine in Embodiment 2. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
FIG. 1 is a radial cross-sectional view of a rotating electrical machine 10a according to an embodiment of the present invention, showing a cross section for 90 degrees. FIG. 2 is an axial sectional view of the rotating electrical machine 10a according to the embodiment of the present invention. As shown in FIG. 1, a rotating electrical machine 10 a includes a stator having an iron core group 20 composed of a plurality of stator iron cores 18 arranged in an annular shape, and a winding 24 wound around the iron core group 20. 12, an inner circumferential rotor 14 that is rotatably held on the inner circumferential side of the stator 12, and an outer circumferential rotor 16 that is rotatably held on the outer circumferential side of the stator 12. As will be described below, in the rotating electrical machine 10a of the present embodiment, the inner circumferential rotor 14 and the outer circumferential rotor 16 rotate at different speeds by passing a three-phase current through the winding 24 of the stator 12. Thus, two outputs (torque output) can be obtained.

  First, the stator 12 will be described. The stator 12 has a total of twelve stator iron cores 18, three of which are shown in FIG. 1. Each stator iron core 18 has a shape in which the radially inner side (inner circumferential side) and the radially outer side (outer circumferential side) are expanded on both sides in the circumferential direction. It has an area around which the wire 24 is wound. As shown in FIG. 2, each stator iron core 18 is fixed to a case 80 of the rotating electrical machine 10a.

  As shown in FIG. 1, the inner peripheral side end of each stator iron core 18 has two recesses 26 spaced apart in the circumferential direction, and each recess 26 extends in the axial direction and is recessed. Yes. A permanent magnet 28 extending in the axial direction is disposed in each recess 26 of each stator core 18. A permanent magnet 28 extending in the axial direction is also disposed in the inner peripheral opening 30 between the stator iron cores 18. Thereby, the some permanent magnet 28 is arrange | positioned along the circumferential direction at the inner peripheral side of the iron core group 20 (several stator iron core 18). Hereinafter, these permanent magnets 28 will be referred to as stator inner magnets 28 as appropriate. Each stator inner magnet 28 is magnetized in the radial direction, and in this embodiment, the radially inner side (the side facing the inner circumferential rotor 14) is the N pole, and the radially outer side is the S pole. It is magnetized to become. There are a total of 36 stator inner magnets 28, and the portion (adjacent portion 32) of the stator core 18 adjacent in the circumferential direction of the stator inner magnet 28 also constitutes a magnetic pole (the return path of the magnetic flux of the stator inner magnet 28). Therefore, the number of magnetic poles formed by the stator inner magnet 28 is 72 (the number of pole pairs is 36).

  Moreover, the one outer periphery side edge part of each stator iron core 18 has one recessed part 34, and the recessed part 34 is extended and dented in the axial direction. A permanent magnet 36 extending in the axial direction is disposed in the recess 34 of each stator core 18. A permanent magnet 36 extending in the axial direction is also disposed in the opening 38 on the outer peripheral side between the stator cores 18. Thereby, the some permanent magnet 36 is arrange | positioned along the circumferential direction at the outer peripheral side of the iron core group 20 (several stator iron core 18). Hereinafter, these permanent magnets 36 are appropriately referred to as stator outer magnets 36. Each stator outer magnet 36 is magnetized in the radial direction, and in this embodiment, the radially inner side is the S pole and the radially outer side (the side facing the outer rotor 16) is the N pole. Is so magnetized. There are a total of 24 stator outer magnets 36, and the portion (adjacent portion 40) of the stator core 18 adjacent in the circumferential direction of the stator outer magnet 36 also constitutes a magnetic pole (the return path of the magnetic flux of the stator outer magnet 36). Therefore, the number of magnetic poles formed by the stator outer magnet 36 is 48 (the number of pole pairs is 24).

  As shown in FIG. 1, the stator 12 has windings (coils) 24 that are inserted into slots 22 between the stator cores 18 and wound around the stator cores 18. The winding 24 is a three-phase winding and is, for example, star-connected as shown in FIG. In addition, the connection method of the coil | winding 24 may be a delta connection etc., and is not limited. Moreover, the connection method of the coil | winding 24 may be parallel connection instead of serial connection like FIG. In this embodiment, the U, V, and W phase windings 24 are concentratedly wound around each stator core 18. Specifically, each of U1, V1, W1, U2, V2, W2, U3, V3, W3, U4, V4, and W4 in FIG. 3 is attached to each stator core 18 in the counterclockwise direction. Arranged (wrapped). Thus, since the three-phase winding is wound around the stator iron core 18, the number of the stator iron cores 18 is a multiple of 3 (12 in this embodiment). In addition, the winding method of winding 24 around the stator core 18 may be distributed winding. In this case, the number of stator cores 18 is a multiple of three.

  In the present embodiment, a rotating magnetic field with the number of pole pairs = 4 is formed in the iron core group 20 by passing a three-phase current through the winding 24. Note that the number of pole pairs formed by the winding 24 is the same as that of a general three-phase synchronous rotating electric machine, and how the winding 24 is wound around the stator core 18 or the winding 24 (three-phase winding). This is determined by the way the three-phase current flows through.

  Next, the inner circumferential side rotor 14 will be described. As shown in FIG. 1, the inner circumferential rotor 14 includes an annular yoke 50 and a plurality of permanent magnets 54 arranged along the circumferential direction. There are a plurality of recessed portions 52 at intervals in the circumferential direction at the outer peripheral side end portion of the yoke 50, and each recessed portion 52 extends in the axial direction and is recessed. A permanent magnet 54 extending in the axial direction is disposed in each recess 52. Hereinafter, the permanent magnet 54 is appropriately referred to as an inner rotor magnet 54.

  Each inner rotor magnet 54 is magnetized in the radial direction, and in this embodiment, the radially inner side is an N pole and the radially outer side (the side facing the stator 12) is an S pole. Magnetized. As described above, the stator inner magnet 28 disposed on the stator 12 is magnetized so that the radially inner side (the side facing the inner circumferential rotor 14) has an N pole. Therefore, the stator inner magnet 28 (N pole) and the inner rotor magnet 54 (S pole) are magnetized so as to attract each other. Since it is sufficient that the magnets are magnetized so as to be attracted to each other in this way, the stator inner magnet 28 is magnetized so that the radially inner side thereof becomes the south pole, and the inner rotor magnet 54 is radially outward. It may be magnetized so that the side becomes an N pole. There are a total of 32 inner rotor magnets 54, and the portion (adjacent portion 56) of the yoke 50 adjacent in the circumferential direction of each inner rotor magnet 54 also constitutes a magnetic pole (a return path for the magnetic flux of the inner rotor magnet 54). Therefore, the number of magnetic poles formed by the inner rotor magnet 54 is 64 (the number of pole pairs is 32).

  As shown in FIG. 2, the inner circumferential rotor 14 is coupled to a rotation shaft (first rotation shaft) 82 via a connection portion 90 fixed to the yoke 50. The rotating shaft 82 is rotatably supported by the case 80 via the bearing 84, protrudes to the outside of the case 80, and outputs the rotational force of the inner peripheral side rotor 14 to the outside of the case 80. In this way, the inner circumferential rotor 14 is rotatably held by the case 80 via the rotation shaft 82 and rotates about the center C of the rotation shaft 82 as the rotation center.

  Next, the outer peripheral side rotor 16 will be described. As shown in FIG. 1, the outer circumferential rotor 16 includes an annular yoke 60 and a plurality of permanent magnets 64 arranged along the circumferential direction. A plurality of recesses 62 are provided at the end on the inner peripheral side of the yoke 60 at intervals in the circumferential direction, and each recess 62 extends in the axial direction and is recessed. A permanent magnet 64 extending in the axial direction is disposed in each recess 62. Hereinafter, the permanent magnet 64 is appropriately referred to as an outer rotor magnet 64.

  Each outer rotor magnet 64 is magnetized in the radial direction, and in this embodiment, the radially inner side (the side facing the stator 12) is the S pole and the radially outer side is the N pole. Magnetized. As described above, the stator outer magnet 36 disposed on the stator 12 is magnetized so that the radially outer side (the side facing the outer rotor 16) has an N pole. Therefore, the stator outer magnet 36 (N pole) and the outer rotor magnet 64 (S pole) are magnetized so as to attract each other. Since the magnets need only be magnetized so as to be attracted to each other as described above, the stator outer magnet 36 is magnetized so that the radially outer side is the south pole, and the outer rotor magnet 64 is radially inward. It may be magnetized so that the side becomes an N pole. There are a total of 20 outer rotor magnets 64, and the portion of the yoke 60 adjacent to the outer rotor magnet 64 in the circumferential direction (adjacent portion 66) also constitutes a magnetic pole (which serves as a return path for the magnetic flux of the outer rotor magnet 64). Therefore, the number of magnetic poles formed by the outer rotor magnet 64 is 40 (the number of pole pairs is 20).

  As shown in FIG. 2, the outer circumferential rotor 16 is coupled to a rotation shaft (second rotation shaft) 86 via a connection portion 92 fixed to the yoke 60. The rotary shaft 86 is rotatably held by the case 80 via a bearing 88 and protrudes to the outside of the case 80 to output the rotational force of the outer peripheral rotor 16 to the outside of the case 80. In this manner, the outer peripheral rotor 16 is rotatably held by the case 80 via the rotation shaft 86 and rotates about the center C of the rotation shaft 86 as the rotation center. As shown in FIG. 2, the center of the rotation shaft 82 of the inner rotor 14 and the center of the rotation shaft 86 of the outer rotor 16 are at the same position (C).

  The inner circumferential rotor 14 is disposed with a gap 70 on the inner circumferential side of the stator 12, and the outer circumferential rotor 16 is disposed with a gap 72 on the outer circumferential side of the stator 12. 1 and 2, the gaps 70 and 72 are drawn slightly wider.

  Here, the number of pole pairs formed by the permanent magnets 54 of the inner circumferential rotor 14 (hereinafter also referred to as “inner rotor pole pair number PIR”) and the current flow through the winding 24 of the stator 12 are formed. The number of pole pairs (hereinafter also referred to as “stator winding magnetic pair number PSC”) and the number of pole pairs formed by the permanent magnets 28 on the inner peripheral side of the core group 20 of the stator 12 (hereinafter referred to as “stator inner pole pair number PSI”) The relationship with the These satisfy the magnetic pole relationship of the vernier motor, and specifically have the relationship of the following (Equation 1).

  | PIR ± PSC | = PSI (Equation 1)

  In the present embodiment, the number obtained by adding PIR (= 32) and PSC (= 4) is PSI (= 36).

  Similarly, the number of pole pairs formed by the permanent magnets 64 of the outer circumferential rotor 16 (hereinafter also referred to as “the outer rotor pole pair number POR”) and the poles formed by passing a current through the winding 24 of the stator 12. The number of pole pairs (stator winding magnetic pair number PSC) and the number of pole pairs formed by the permanent magnets 36 on the outer peripheral side of the iron core group 20 of the stator 12 (hereinafter also referred to as “stator outer pole pair number PSO”) are vernier The motor magnetic pole relationship is satisfied. Specifically, it has the relationship of the following (Equation 2).

  | POR ± PSC | = PSO (Equation 2)

  In the present embodiment, the number obtained by adding POR (= 20) and PSC (= 4) is PSO (= 24).

  Thus, the relationship between the number of pole pairs on the inner peripheral side (the relationship between PIR, PSC, and PSI) and the relationship between the number of pole pairs on the outer peripheral side (the relationship between POR, PSC, and PSO) are both the magnetic pole relationships of the vernier motor. Satisfies. However, their magnetic pole relationships are not the same. That is, the inner rotor pole pair number PIR is 32 (stator inner pole pair number PSI is 36), whereas the outer rotor pole pair number POR is 20 (stator outer pole pair number PSO is 24), and the number (pole Logarithm) is different. As a result, as will be described later, when a three-phase current is passed through the winding 24 of the stator 12, the inner rotor 14 and the outer rotor 16 rotate at different speeds.

  Next, operation | movement of the rotary electric machine 10a in this embodiment is demonstrated. By passing a three-phase current through the winding 24 of the stator 12, a rotating magnetic field of four pole pairs (number of pole pairs = 4) is formed (generated) in the iron core group 20, and this rotating magnetic field is generated by the inner circumferential rotor. 14 and the outer peripheral rotor 16 are used in common. Due to the three-phase current of the winding 24, a driving force is generated in the inner rotor 14 and the outer rotor 16, and each of them rotates. These respective rotational forces are output from the first rotary shaft 82 and the second rotary shaft 86.

  The inner circumferential rotor 14 rotates at a speed (outer rotor pole pair number POR / inner rotor pole pair number PIR) with respect to the rotational speed of the outer circumferential rotor 16, and in this embodiment, the inner circumferential rotor. 14 rotates at a speed of 5/8 (= 20/32) with respect to the rotational speed of the outer circumferential rotor 16.

  Here, as an example, a three-phase current that flows through the winding 24 when the outer peripheral rotor 16 is rotated at a speed of 480 rpm (8 rps) and the inner peripheral rotor 14 is rotated at a speed of 300 rpm (5 rps). The drive frequency will be described. First, when attention is paid to rotating the outer circumferential rotor 16 at a speed of 480 rpm (8 rps), it can be seen from the following equation (3) that the driving frequency of the three-phase current is 160 Hz.

  POR × rotational speed of outer rotor = 20 × 8 (rps) = 160 (Hz) (Equation 3)

  Further, when attention is paid to rotating the inner rotor 14 at a speed of 300 rpm (5 rps), it can be seen from the following formula (Equation 4) that the driving frequency of the three-phase current is 160 Hz.

  PIR × rotation speed of inner rotor = 32 × 5 (rps) = 160 (Hz) (Equation 4)

  Thus, the outer peripheral rotor 16 and the inner peripheral rotor 14 can be rotated at different speeds by a three-phase current having a common drive frequency (= 160 Hz). That is, by supplying a three-phase current to the winding 24 of the stator 12 by a single inverter, the inner peripheral rotor 14 and the outer peripheral rotor 16 are rotated at different rotational speeds (number of rotations). be able to.

  FIG. 4 is a diagram illustrating magnetic flux lines (FEM analysis results) when the winding 24 (three-phase winding) of the stator 12 is energized. FIG. 5 is a diagram illustrating an example of the torque IT of the inner circumferential rotor 14 and the torque OT of the outer circumferential rotor 16. As shown in FIG. 5, by supplying a three-phase current to the winding 24 of the stator 12, the inner circumferential side rotor 14 and the outer circumferential side rotor 16 rotate at different speeds, and they have different torque outputs. Become. In addition, the torque IT of the inner circumferential rotor 14 and the torque OT of the outer circumferential rotor 16 are controlled by controlling the current advance angle, which is the phase of the alternating current flowing through each phase of the three-phase winding, by the inverter. And can be changed. Thereby, for example, the torque IT of the inner circumferential rotor 14 and the torque OT of the outer circumferential rotor 16 can be made the same.

  According to the rotary electric machine 10a of the present embodiment described above, the current is supplied to the winding 24 of the stator 12 by one inverter, whereby two rotors (the inner rotor 14 and the outer rotor) are supplied. The child 16) can be rotated at different speeds and two outputs (torque output) can be obtained. This can be realized with a simple configuration in which the inner rotor 14 and the outer rotor 16 share the magnetic circuit of the stator 12. Thus, since only one inverter is required and the configuration of the rotating electrical machine is simple, the motor system is smaller and lighter than the conventional motor system required to obtain two torque outputs. (Rotating electrical machine system).

  The rotating electrical machine 10a of the present embodiment stops the outer peripheral rotor 16 and rotates the inner peripheral rotor 14 by external power (rotates the first rotating shaft 82), or the inner peripheral side The rotor 14 is stopped and the outer rotor 16 is rotated by external power (the second rotating shaft 86 is rotated), so that an induced current is generated in the winding 24 of the stator 12 and functions as a generator. It is possible to make it.

<Embodiment 2>
Next, the rotary electric machine 10b in another embodiment is demonstrated. Hereinafter, the above-described embodiment is referred to as “Embodiment 1”, and the other embodiment is referred to as “Embodiment 2”. FIG. 6 is a radial cross-sectional view of the rotating electrical machine 10b according to the second embodiment, showing a cross section for 90 degrees. In FIG. 6, the same members as those of the rotating electrical machine 10 a according to the first embodiment are denoted by the same reference numerals. The axial sectional view of the rotating electrical machine 10b in the second embodiment is the same as the axial sectional view (FIG. 2) of the rotating electrical machine 10a in the first embodiment. The difference between the rotating electrical machine 10b of the second embodiment and the rotating electrical machine 10a of the first embodiment is the number of permanent magnets (outer rotor magnets) 64 arranged on the outer circumferential rotor 16, and in the second embodiment, it is the same. There are 28 pieces. Others are the same as the rotary electric machine 10a of Embodiment 1.

  Here, in the second embodiment, the number of pole pairs formed by the permanent magnets 64 of the outer peripheral rotor 16 (the number of outer rotor pole pairs POR) and the poles formed by flowing current through the windings 24 of the stator 12. The relationship between the number of pairs (stator winding magnetic pair number PSC) and the number of pole pairs (stator outer pole pair number PSO) formed by the permanent magnets 36 on the outer peripheral side of the iron core group 20 of the stator 12 will be described. These satisfy the magnetic pole relationship of the vernier motor as in the first embodiment, and have the relationship expressed by the above formula (2). Specifically, in the second embodiment, the number obtained by subtracting PSC (= 4) from POR (= 28) is PSO (= 24). The relationship between the number of pole pairs on the inner peripheral side (the relationship between the number of pole pairs PIR, the number of stator winding magnetic pairs PSC, the number of pole pairs inside the stator PSI) is the same as in the first embodiment, and PIR (= 32) And PSC (= 4) are added to PSI (= 36).

  Also in the second embodiment, the relationship between the number of pole pairs on the inner peripheral side (the relationship between PIR, PSC, PSI) and the relationship between the number of pole pairs on the outer peripheral side (the relationship between POR, PSC, PSO) are both the magnetic poles of the vernier motor. Although the relationship is satisfied, the magnetic pole relationship is not the same. That is, the inner rotor pole pair number PIR is 32 (stator inner pole pair number PSI is 36), whereas the outer rotor pole pair number POR is 28 (stator outer pole pair number PSO is 24), and the number (pole Logarithm) is different. Thereby, also in Embodiment 2, when a three-phase current is passed through the winding 24 of the stator 12, the inner circumferential rotor 14 and the outer circumferential rotor 16 rotate at different speeds.

  In the second embodiment, the inner circumferential rotor 14 rotates at a speed of 7/8 (= POR / PIR = 28/32) with respect to the rotational speed of the outer circumferential rotor 16. Here, as an example, the outer rotor 16 is rotated at a speed of 342.86 rpm (5.71 rps), and the inner rotor 14 is rotated at a speed of 300 rpm (5 rps). The driving frequency of the three-phase current that flows to the winding 24 is 160 Hz (calculated in accordance with the above-described Equations (3) and (4) is 160 Hz).

  FIG. 7 is a diagram illustrating magnetic flux lines (FEM analysis results) when the winding 24 (three-phase winding) of the stator 12 of the rotating electrical machine 10b according to the second embodiment is energized. FIG. 8 is a diagram illustrating an example of the torque IT of the inner rotor 14 and the torque OT of the outer rotor 16 of the rotating electrical machine 10b according to the second embodiment. As shown in FIG. 8, also in the second embodiment, different torque outputs can be obtained between the inner circumferential rotor 14 and the outer circumferential rotor 16.

  Also in the rotary electric machine 10b of Embodiment 2 demonstrated above, the effect similar to the rotary electric machine 10a of Embodiment 1 can be acquired. That is, by supplying a current to the winding 24 of the stator 12 by one inverter, the two rotors (the inner circumferential side rotor 14 and the outer circumferential side rotor 16) can be rotated at different speeds. Two torque outputs can be obtained.

<Appendix>
The inner rotor pole pair number PIR, stator winding magnetic pair number PSC, stator inner pole pair number PSI, outer rotor pole pair number POR and stator outer pole pair number PSO in the first and second embodiments described above are merely examples. The number is not limited as long as the magnetic pole relationship of the vernier motor of the above-described (Equation 1) and (Equation 2) is satisfied. Further, for example, the number obtained by subtracting the stator winding magnetic pair number PSC from the inner rotor pole pair number PIR not described above is the stator inner pole pair number PSI, and the outer rotor pole pair number POR is It may be a rotating electrical machine in which the number obtained by adding the stator winding magnetic pair number PSC is the stator outer pole pair number PSO. Alternatively, the number obtained by subtracting the stator winding magnetic pair number PSC from the inner rotor pole pair number PIR is the stator inner pole pair number PSI, and the stator winding magnetic pair number PSC is subtracted from the outer rotor pole pair number POR. The rotating electric machine may be a stator outer pole pair number PSO.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement with a various form. .

10a, 10b Rotating electrical machine, 12 Stator, 14 Inner circumferential rotor, 16 Outer circumferential rotor, 18 Stator iron core, 20 Iron core group, 22 Slots, 24 Winding (coil), 26 Recessed part, 28 Permanent Magnet (stator inner magnet), 30 opening, 32 adjacent portion, 34 recessed portion, 36 permanent magnet (stator outer magnet), 38 opening, 40 adjacent portion, 50 yoke, 52 recessed portion, 54 permanent magnet (inner rotor) Magnet), 56 adjacent portion, 60 yoke, 62 recessed portion, 64 permanent magnet (outer rotor magnet), 66 adjacent portion, 70, 72 gap portion, 80 case, 82 rotating shaft (first rotating shaft), 84 bearing, 86 Rotating shaft (second rotating shaft), 88 bearings, 90, 92 connection part.

Claims (5)

A fixed iron core group comprising a plurality of stator iron cores arranged in an annular shape, and a winding wound around the stator iron core through a slot between the stator iron cores With the child,
An inner circumferential rotor that is rotatably held on the inner circumferential side of the stator and in which a plurality of permanent magnets are arranged along the circumferential direction;
An outer peripheral rotor that is rotatably held on the outer peripheral side of the stator and has a plurality of permanent magnets disposed along the circumferential direction,
The inner peripheral rotor and the outer peripheral rotor are rotating electrical machines connected to different rotating shafts,
A plurality of permanent magnets are arranged along the circumferential direction on the inner peripheral side and the outer peripheral side of the iron core group,
The number of pole pairs formed by the permanent magnets of the inner circumferential rotor is different from the number of pole pairs formed by the permanent magnets of the outer circumferential rotor.
Rotating electric machine characterized by that. The rotating electrical machine according to claim 1,
The winding wound around the stator core is a three-phase winding,
The number of stator cores is a multiple of three;
Rotating electric machine characterized by that. The rotating electrical machine according to claim 1 or 2,
The number of pole pairs formed by the permanent magnets of the inner circumferential rotor, the number of pole pairs formed by passing a current through the windings, and the number of pole pairs formed by the permanent magnets on the inner circumferential side of the iron core group Has the magnetic pole relationship of a vernier motor,
The number of pole pairs formed by the permanent magnets of the outer rotor, the number of pole pairs formed by passing current through the windings, and the number of pole pairs formed by the permanent magnets on the outer circumference side of the iron core group are: , Having magnetic pole relationship of vernier motor,
Rotating electric machine characterized by that. The rotating electrical machine according to claim 3,
The number of pole pairs formed by the permanent magnets on the inner peripheral side of the iron core group is the number of pole pairs formed by the permanent magnets of the inner peripheral rotor and the number of pole pairs formed by flowing current through the windings. And the number
The number of pole pairs formed by the permanent magnets on the outer peripheral side of the iron core group is the number of pole pairs formed by the permanent magnets of the outer rotor and the number of pole pairs formed by flowing current through the windings. It is the added number,
Rotating electric machine characterized by that. The rotating electrical machine according to claim 3,
The number of pole pairs formed by the permanent magnets on the inner peripheral side of the iron core group is the number of pole pairs formed by the permanent magnets of the inner peripheral rotor and the number of pole pairs formed by flowing current through the windings. And the number
The number of pole pairs formed by the permanent magnets on the outer peripheral side of the iron core group is subtracted from the number of pole pairs formed by the permanent magnets of the outer rotor on the outer peripheral side. The number of
Rotating electric machine characterized by that.