JP2015095998A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of achieving high-speed rotation and capable of outputting high torque in a low-speed rotation region.SOLUTION: A rotary electric machine 1 includes a stator 3 in which coils 15 are respectively wound around teeth 12, and a rotor 4 in which permanent magnets 23 are fixed on a rotor core 22. The rotor 4 is partitioned into four magnetic pole blocks 33 each of which includes two magnet magnetic pole portions 31 in which the same polarity corresponding to the polarity of the permanent magnet respectively appears and a core magnetic pole portion 32 arranged between the two magnet magnetic pole portions 31. In the respective magnetic pole blocks 33, the respective magnet magnetic pole portions 31 are arranged adjacently to the magnet magnetic pole portion 31 with different polarity in a peripheral direction. The rotary electric machine 1 further includes a magnetic flux supply body 35 supported on the inner peripheral side of the rotor 4 so as to be rotated relatively to the rotor 4 and formed by alternately arranging supply body magnetic pole portions 34 with respective different polarity in the peripheral direction.

Description

  The present invention relates to a rotating electrical machine.

  2. Description of the Related Art Conventionally, a rotating electric machine in which a permanent magnet serving as a field is fixed to a rotor is widely known. As such a rotor, a so-called embedded magnet type in which permanent magnets are embedded in a rotor core (for example, Patent Document 1), or a so-called surface magnet type in which permanent magnets are fixed on the surface of a rotor core (for example, patents). Reference 2).

JP 2001-352702 A JP 2010-172195 A

  By the way, in the permanent magnet field type rotating electrical machine as described above, since the magnetic flux generated by the permanent magnet is substantially constant, the induced voltage (back electromotive voltage) generated in the stator coil is proportional to the rotational speed of the rotor. Become bigger. When this induced voltage reaches the upper limit of the power supply voltage, the rotor can no longer be rotated at a high speed. Therefore, in applications where high-speed rotation is required, it is conceivable to design the magnetic flux (interlinkage flux with respect to the coil) generated by a permanent magnet so that the rotor can sufficiently rotate at high speed. In this case, a sufficiently high torque cannot be obtained in the low speed rotation range. Therefore, there has been a demand for the development of a new technology that can rotate at a high speed and can output a high torque in a low-speed rotation range.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotating electrical machine that can rotate at a high speed and can output a high torque in a low-speed rotation region.

  A rotating electrical machine that solves the above problems includes a stator core, a stator having coils provided on teeth of the stator core, a rotor core fixed to a rotating shaft so as to be integrally rotatable, and a rotor having a permanent magnet fixed to the rotor core. The rotor is divided into a plurality of magnetic pole blocks, and each magnetic pole block has two magnet magnetic pole portions in which the same polarity according to the polarity of the permanent magnet appears, and the two magnets A plurality of magnetic pole blocks, wherein the magnetic pole part in one magnetic pole block and the magnetic pole part in the other magnetic pole block have different polarities and are adjacent in the circumferential direction. Are aligned so that they can rotate relative to the rotor and have different polarities. A magnetic flux supply body in which a supply magnetic pole portion is formed side by side in the circumferential direction; and an angle adjustment device that adjusts a relative rotation angle between the rotor and the magnetic flux supply body between a high torque angle and a high-speed rotation angle. The summary is provided.

  According to the above configuration, by adjusting the relative rotation angle between the rotor and the magnetic flux supplier between the high torque angle and the high speed rotation angle, it is possible to rotate at high speed and output high torque in the low speed rotation range. become.

  In the rotating electrical machine, the high torque angle is such that the supply magnetic pole portion facing the core magnetic pole portion in one magnetic pole block has a polarity opposite to the polarity of each magnet magnetic pole portion in the one magnetic pole block. The high-speed rotation angle is the same as the polarity of each of the magnet magnetic pole portions in the one magnetic pole block, the supply magnetic pole portion facing the core magnetic pole portion in the one magnetic pole block The angle is preferably polar.

  According to the above configuration, assuming that no magnetic flux is supplied from the magnetic flux supplier, the core magnetic pole portion functions as a magnetic pole having a polarity opposite to that of the magnet magnetic pole portion due to the magnetic flux generated by the permanent magnet. That is, each magnetic pole block functions as three magnetic poles. Here, when the relative rotation angle between the rotor and the magnetic flux supplier is a high torque angle, the core magnetic pole portion faces the supply magnetic pole portion having the opposite polarity to each magnet magnetic pole portion of the same magnetic pole block. For this reason, the magnetic flux supplied from the magnetic flux supplier to the rotor flows in the same direction as the magnetic flux made of the permanent magnet between the stator and the core magnetic pole portion. On the other hand, when the relative rotation angle between the rotor and the magnetic flux supplier is a high-speed rotation angle, the core magnetic pole portion faces the supply magnetic pole portion having the same polarity as each magnet magnetic pole portion of the same magnetic pole block. Therefore, the magnetic flux supplied from the magnetic flux supplier to the rotor flows between the stator and the core magnetic pole portion in the opposite direction to the magnetic flux produced by the permanent magnet. By adjusting the relative rotation angle between the rotor and the magnetic flux supply body in this way, the magnetic flux passing through between the stator and the core magnetic pole part (linkage magnetic flux with respect to the coil) can be adjusted. High torque can be output in the region.

  In the rotating electrical machine, the magnetic flux supply body has a polarity of the core magnetic pole portion in the magnetic pole block in a state where the relative rotation angle between the rotor and the magnetic flux supply body is the high-speed rotation angle. It is preferable that an amount of magnetic flux that is the same as the polarity of the magnet magnetic pole portion be supplied.

  According to the above configuration, when the relative rotation angle between the rotor and the magnetic flux supplier is a high-speed rotation angle, the core magnetic pole portion functions as a magnetic pole having the same polarity as each magnetic pole portion of the same magnetic pole block. The magnetic pole block functions as one magnetic pole. On the other hand, when the relative rotation angle between the rotor and the magnetic flux supplier is a high torque angle, the core magnetic pole portion functions as a magnetic pole of the opposite polarity to each magnet magnetic pole portion of the same magnetic pole block. Functions as a magnetic pole. That is, by adjusting the relative rotation angle between the rotor and the magnetic flux supplier, the number of magnetic poles of the rotor changes to be the same as or three times the number of magnetic pole blocks. Here, when the rotational speed of the rotor is the same, if the number of magnetic poles of the rotor is small, the time required for switching the magnetic poles facing the coils becomes long, and the amount of change in the interlinkage magnetic flux per unit time becomes small. Since the induced voltage is proportional to the amount of change in interlinkage magnetic flux per unit time, if the number of magnetic poles of the rotor is small, the induced voltage becomes small and the rotor can be sufficiently rotated at high speed.

  In the rotating electric machine, it is preferable that the angle adjustment device includes an adjustment coil provided in the teeth and a control device that generates an adjustment magnetic pole at a portion facing the core magnetic pole portion by energizing the adjustment coil.

  According to the above-described configuration, the adjustment coil having the opposite polarity to each magnet magnetic pole part of the same magnetic pole block is generated in the part facing the core magnetic pole part by energization of the adjustment coil, so that the rotor and the magnetic flux supplier are relatively The rotation angle becomes a high-speed rotation angle. On the other hand, when the adjustment coil is energized, an adjustment magnetic pole having the same polarity as that of the magnet magnetic pole part of the same magnetic pole block is generated at a portion facing the core magnetic pole part, so that the relative rotation angle between the rotor and the magnetic flux supplier is high torque. It becomes an angle. Therefore, for example, it is not necessary to incorporate a device for relatively rotating the magnetic flux supply body between the rotor and the magnetic flux supply body, and the rotating electric machine can have a simple configuration.

  In the rotating electrical machine, the rotor rotates integrally with one of the rotor and the magnetic flux supplier, and rotates integrally with the first holding member on which the first engaging portion is formed and the other of the rotor and the magnetic flux supplier. And a second holding member formed with a second engaging portion that holds the relative rotation angle between the rotor and the magnetic flux supply body at the high torque angle by engaging with the first engaging portion; An engaging member that engages the first holding member and the second holding member, wherein at least one of the first and second engaging portions has an inclined surface that is inclined with respect to a circumferential direction; The inclined surface is formed by rotating the rotor and the magnetic flux supplier relative to each other from the state where the relative rotation angle between the rotor and the magnetic flux supplier is the high torque angle. So as to release the engagement with the second engaging portion. It made it is preferable.

  According to the above configuration, when the magnetic flux supplier has a high torque angle, the relative engagement angle between the rotor and the magnetic flux supplier is a high torque angle by engaging the first engagement portion and the second engagement portion. Retained. Therefore, the relative rotation angle between the rotor and the magnetic flux supplier can be firmly held at a high torque angle.

  In the rotating electrical machine, the angle adjusting device includes: a small motor that rotates integrally with one of the rotor and the magnetic flux supplier; a drive gear that is drivingly connected to the small motor; and the rotor and the magnetic flux supplier. It is preferable to include a driven gear that rotates integrally with the other and meshes with the drive gear.

  According to the above configuration, the rotation of the drive gear driven by the small motor is transmitted to the driven gear, so that the magnetic flux supply body rotates relative to the rotor, and the relative rotation angle between the rotor and the magnetic flux supply body increases. It is adjusted between the torque angle and the high speed rotation angle. Therefore, the relative rotation angle between the rotor and the magnetic flux supplier can be easily adjusted to an arbitrary angle between the high torque angle and the high speed rotation angle.

  According to the present invention, the rotor can be rotated at a high speed and a high torque can be output in a low-speed rotation region.

Sectional drawing along the axial direction of the rotary electric machine of 1st Embodiment. (A) is sectional drawing (AA sectional drawing of FIG. 1) orthogonal to the axial direction of the rotary electric machine of 1st Embodiment, (b) is a fragmentary sectional view of the rotor of (a). (A) is a schematic diagram showing the flow of magnetic flux when the relative rotation angle between the rotor of the first embodiment and the magnetic flux supplier is a high torque angle, and (b) is the flow of magnetic flux when the rotation angle is also high. FIG. (A) is a schematic diagram showing the vicinity of the holding mechanism when the relative rotation angle between the rotor and the magnetic flux supplier of the first embodiment is a high torque angle (viewed in the direction of arrow B in FIG. 3 (a)), (b). FIG. 4 is a schematic diagram showing the vicinity of the holding mechanism when the rotation angle is the same (as viewed from arrow C in FIG. 3B). (A), (b) is the opposite polarity of the magnet magnetic pole part adjacent to the site | part facing a core magnetic pole part, when the relative rotation angle of the rotor of 1st Embodiment and a magnetic flux supply body is a high torque angle. The schematic diagram which shows the flow of the magnetic flux at the time of generating an adjustment magnetic pole. (A), (b) is the same polarity as the magnet magnetic pole part adjacent to the part which opposes a core magnetic pole part, when the relative rotation angle of the rotor of 1st Embodiment and a magnetic flux supply body is a high-speed rotation angle. The schematic diagram which shows the flow of the magnetic flux at the time of generating an adjustment magnetic pole. Sectional drawing along the axial direction of the rotary electric machine of 2nd Embodiment. Sectional drawing of the output rotor which shows the angle adjusting device vicinity of 2nd Embodiment (DD sectional drawing of FIG. 7). Sectional drawing along the axial direction of the rotary electric machine of 3rd Embodiment. Sectional drawing orthogonal to the axial direction of the rotary electric machine of 3rd Embodiment (EE sectional drawing of FIG. 9). Sectional drawing orthogonal to the axial direction of the magnetic flux supply body of 3rd Embodiment (FF sectional drawing of FIG. 9). (A)-(d) is sectional drawing orthogonal to the axial direction of the rotor of another example.

(First embodiment)
Hereinafter, 1st Embodiment of a rotary electric machine is described according to drawing.
A rotating electrical machine (electric motor) 1 shown in FIG. 1 and FIGS. 2A and 2B is used as a driving source for traveling of an electric vehicle or a hybrid vehicle, for example. As shown in FIG. 1, the rotating electrical machine 1 includes a cylindrical housing 2, a stator 3 accommodated in the housing 2, and a rotor disposed on the radially inner side (inner peripheral side) of the stator 3 with a space therebetween. 4 is provided. That is, the rotating electrical machine 1 of the present embodiment is configured as an inner rotor type radial gap motor. The rotating electrical machine 1 also includes a rotation angle sensor 5 such as a resolver that detects the rotation angle of the rotor 4, and a control device 6 that generates a rotating magnetic field in the stator 3 by supplying power according to the rotation angle of the rotor 4. And.

  Specifically, the housing 2 includes a bottomed cylindrical housing body 7 that is open on one end side (right side in FIG. 1), and a disc-shaped cover 8 that is provided so as to close the opening end of the housing body 7. I have. An insertion hole 7b penetrating in the axial direction is formed at the center of the bottom 7a of the housing body 7, and an insertion hole 8a penetrating in the axial direction is formed at the center of the cover 8.

  The stator 3 includes a cylindrical cylindrical portion 11 fixed inside the cylindrical portion 7c of the housing main body 7, and a stator core 13 including a plurality of teeth 12 extending radially inward from the cylindrical portion 11 in the radial direction. Yes. The stator core 13 of the present embodiment has nine teeth 12 formed therein, and the number of slots formed between the teeth 12 is also nine. The stator core 13 is configured by laminating a plurality of electromagnetic steel plates such as silicon steel plates. Each tooth 12 is provided with a coil (armature coil) 15. The connection end 15 a of the coil 15 is drawn out of the housing 2 and connected to the control device 6.

  The rotor 4 includes a cylindrical rotor core 22 fixed so as to rotate integrally with the rotary shaft 21, and a plurality (eight in this embodiment) of permanent magnets 23 fixed to the rotor core 22. The rotating shaft 21 is formed in a columnar shape, and is rotatably supported via bearings 24 a and 24 b provided in the insertion hole 7 b of the bottom portion 7 a and the insertion hole 8 a of the cover 8. The rotary shaft 21 is made of a nonmagnetic material such as stainless steel.

  The control device 6 drives the three phases (U, V, W) supplied to the coil 15 based on the d-axis current and the q-axis current in the two-phase rotation coordinate system (d / q coordinate system) according to the rotation angle of the rotor 4. Electric power is controlled and a rotating magnetic field is generated in the stator 3. The d-axis current is a current that generates a magnetic pole in the direction of the magnetic flux generated by the magnetic pole of the rotor 4 with respect to the stator 3 (d-axis direction). This is a current that generates magnetic poles in the q-axis direction that is shifted by 90 ° in angle. The rotor 4 rotates based on the relationship between the rotating magnetic field generated in the stator 3 and the magnetic flux generated in the rotor 4.

(Rotor structure)
Here, the rotor 4 has two magnet magnetic pole portions 31 in which the same polarity according to the polarity of the permanent magnet 23 always appears, and a core magnetic pole portion 32 arranged between the two magnet magnetic pole portions 31. It is divided into a plurality (four in this embodiment) of magnetic pole blocks 33. These magnetic pole blocks 33 are arranged so that the magnet magnetic pole part 31 in one magnetic pole block 33 and the magnet magnetic pole part 31 in the other magnetic pole block 33 have different polarities and are adjacent in the circumferential direction. The rotating electrical machine 1 is supported by the rotor 4 (rotating shaft 21) so as to be relatively rotatable on the inner peripheral side of the rotor 4, and the supply magnetic pole portions 34 having different polarities are alternately arranged in the circumferential direction. The magnetic flux supply body 35 is provided. In the rotating electrical machine 1 of the present embodiment, the number of magnetic poles of the rotor 4 is the same as or three times that of the magnetic pole block 33, that is, 4 or 12 by changing the relative rotation angle of the magnetic flux supplier 35 with respect to the rotor 4. Switching is possible.

First, the configuration of the rotor will be described in detail.
The rotor core 22 of the rotor 4 includes a cylindrical core body 41 to which the permanent magnet 23 is fixed, and a pair of connecting members 42 and 43 that are fixed to both ends of the core body 41 and are connected to the rotary shaft 21 so as to be integrally rotatable. And. The connecting members 42 and 43 are formed in an annular shape, and the fitting shafts 42 a and 43 a formed at the centers of the connecting members 42 and 43 are press-fitted into the outer periphery of the rotating shaft 21. And are connected to be rotatable together. The core body 41 is formed by laminating a plurality of electromagnetic steel plates, and the connecting members 42 and 43 are made of a nonmagnetic material such as stainless steel.

  As shown in FIGS. 2A and 2B, the core main body 41 is formed with a plurality (eight in this embodiment) of hollow portions 44 in which the permanent magnets 23 are disposed. In these cavities 44, two cavities 44 are arranged close to each other, and pairs of the two cavities 44 arranged in parallel are arranged at equal angular intervals in the circumferential direction. Each cavity 44 is formed in a hole shape having a rectangular cross section extending in the axial direction, and is formed so that the longitudinal direction of the rectangular cross section is substantially orthogonal to the radial line passing through the center thereof. . Further, air gaps (flux barriers) 45 are formed on both sides in the circumferential direction of the pair of hollow portions 44 arranged side by side. The air gap 45 penetrates in the axial direction and is formed in a groove shape extending radially inward from the outer peripheral surface of the rotor core 22.

  As the permanent magnet 23 of the present embodiment, a segment magnet made of a sintered magnet or a bond magnet (for example, a plastic magnet or a rubber magnet) formed in a rectangular plate shape is employed. A cross-sectional shape of the permanent magnet 23 perpendicular to the axial direction of the rotor 4 is a rectangular shape corresponding to the cross-sectional shape of the hollow portion 44, and the permanent magnet 23 is inserted into the hollow portion 44, whereby the core main body 41. It is fixed to. That is, the rotor 4 of the present embodiment is configured as a so-called embedded magnet type rotor. The permanent magnets 23 are arranged so that the polarities appearing on the outer peripheral side of the rotor core 22 are alternately reversed every two along the circumferential direction, and the polarities of the permanent magnets 23 arranged close to each other are reversed. It is magnetized in the plate thickness direction (direction substantially along the radial direction of the rotor 4). As a result, the polarity on the outer peripheral side of the permanent magnet 23 always appears in a portion of the outer peripheral surface of the core body 41 facing the cavity 44.

  Accordingly, the portion of the core body 41 where the cavity 44 is formed functions as the magnet magnetic pole portion 31, and the portion between each pair of the two aligned hollow portions 44 functions as the core magnetic pole portion 32. Further, the polarity of each magnet magnetic pole portion 31 of the magnetic pole block 33 is opposite to the polarity of the magnet magnetic pole portion 31 of the adjacent magnetic pole block 33. In this embodiment, each magnet magnetic pole portion 31 and core magnetic pole portion 32 extend over a circumferential range of about 30 °, and the magnetic pole block 33 extends over a circumferential range of about 90 °. . Assuming that no magnetic flux is supplied from the magnetic flux supplier 35, the core magnetic pole portion 32 functions as a magnetic pole having a polarity opposite to that of each magnet magnetic pole portion 31 due to the magnetic flux generated by the permanent magnet 23. Each functions as three magnetic poles.

Next, the configuration of the magnetic flux supplier will be described in detail.
As shown in FIG. 1 and FIGS. 2A and 2B, the magnetic flux supplier 35 includes a cylindrical supplier core 51 and a plurality of auxiliary magnets 52 fixed to the supplier core 51. In the magnetic flux supply body 35, the auxiliary magnets 52 are fixed to the supply body core 51, whereby supply body magnetic pole portions 34 having different polarities are alternately formed in the circumferential direction. The magnetic flux supply body 35 of the present embodiment is provided with the same number of auxiliary magnets 52 as the magnetic pole block 33.

  Specifically, the supply body core 51 includes a cylindrical support member 53 and a cylindrical magnet holding member 54 fixed to the outer periphery of the support member 53. The support member 53 is made of a magnetic material, and the magnet holding member 54 is made by laminating a plurality of electromagnetic steel plates. Both ends of the support member 53 are supported relative to the housing 2 and the rotor 4 via bearings 55a and 55b provided on the outer periphery of the rotary shaft 21.

  As shown in FIGS. 2A and 2B, a plurality (four in this embodiment) of fixed recesses 56 are formed on the outer peripheral surface of the magnet holding member 54 at equal angular intervals in the circumferential direction. ing. The fixed recess 56 is formed in a substantially arc shape whose cross section orthogonal to the axial direction extends over a circumferential range slightly narrower than 90 °.

  As the auxiliary magnet 52, a plate-shaped segment magnet curved in an arc shape is employed. The cross-sectional shape of the auxiliary magnet 52 orthogonal to the axial direction of the rotor 4 is an arc shape corresponding to the cross-sectional shape of the fixed recess 56, and the auxiliary magnet 52 is fitted to the fixed recess 56 and is supplied to the supply core 51. It is fixed to. The auxiliary magnet 52 has a thickness direction (in the radial direction of the rotor 4) such that the polarities appearing on the outer peripheral side of the magnetic flux supplier 35 (inner peripheral side of the rotor core 22) are alternately opposite along the circumferential direction. It is magnetized in a direction substantially along). Thereby, in this embodiment, the auxiliary magnet 52 itself functions as the supply body magnetic pole part 34. The auxiliary magnet 52 is in a state in which the polarity of the supply magnetic pole portion 34 facing the core magnetic pole portion 32 in one magnetic pole block 33 is the same as the polarity of each magnet magnetic pole portion 31 in the one magnetic pole block 33. The magnetic pole magnet 32 is magnetized to a strength that can supply an amount of magnetic flux so that the polarity of the core magnetic pole portion 32 is the same as the polarity of the magnet magnetic pole portion 31 (at a high-speed rotation angle described later). Further, the supply magnetic pole portion 34 (auxiliary magnet 52) is substantially the same as the magnet magnetic pole portion 31 and the core magnetic pole portion 32 in a state where the circumferential central position thereof is opposed to the circumferential central position of the core magnetic pole portion 32 in the radial direction. The magnet magnetic pole portions 31 that face the whole and are adjacent to each other in the radial direction do not face the radial direction.

Next, the number of magnetic poles of the rotor will be described in detail. In the drawing, the magnetization direction of the magnet is indicated by a thick arrow, and the flow of magnetic flux is indicated by a broken arrow.
As shown in FIG. 3A, the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is set such that the polarity of the supply magnetic pole portion 34 that is radially opposed to the core magnetic pole portion 32 in one magnetic pole block 33 is If the angle (high torque angle) is opposite to the polarity of each magnet magnetic pole portion 31 in the one magnetic pole block 33, each magnetic pole block 33 functions as three magnetic poles. That is, the number of magnetic poles of the rotor 4 is 12.

  Specifically, when the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is set to a high torque angle, the core magnetic pole portion 32 has a polarity opposite to that of the magnet magnetic pole portion 31 of the same magnetic pole block 33. It faces the part 34. Therefore, the magnetic flux supplied from the magnetic flux supplier 35 to the rotor 4 flows between the stator 3 and the core magnetic pole portion 32 in the same direction as the magnetic flux generated by the permanent magnet 23. Similarly to the case where the magnetic flux is not supplied from the magnetic flux supplier 35, the opposite polarity to the magnet magnetic pole portions 31 appears on the stator 3 side.

  More specifically, for example, the magnetic pole block 33 arranged at the upper left in the figure has an S-pole magnet magnetic pole portion 31, and the core magnetic pole portion 32 faces the N-pole supply magnetic pole portion 34. Therefore, a part of the magnetic flux emitted from the N pole of the permanent magnet 23 and a part of the magnetic flux emitted from the supply magnetic pole part 34 (auxiliary magnet 52) flow out from the outer peripheral surface of the core magnetic pole part 32 to the stator 3 side. The core magnetic pole portion 32 functions as an N pole. Thereby, different polarities appear in each magnet magnetic pole part 31 and core magnetic pole part 32 of this magnetic pole block 33, and this magnetic pole block 33 functions as three magnetic poles. Further, for example, the magnetic pole block 33 arranged at the upper right in the figure has an N-pole magnet magnetic pole portion 31, and the core magnetic pole portion 32 faces the S-pole supply magnetic pole portion 34. Therefore, a part of the magnetic flux entering the S pole of the permanent magnet 23 and a part of the magnetic flux entering the supply magnetic pole part 34 (auxiliary magnet 52) flow from the outer peripheral surface of the core magnetic pole part 32. The part 32 functions as an S pole. Thereby, different polarities appear in each magnet magnetic pole part 31 and core magnetic pole part 32 of this magnetic pole block 33, and this magnetic pole block 33 functions as three magnetic poles.

  On the other hand, as shown in FIG. 3B, the relative rotation angle between the rotor 4 and the magnetic flux supply body 35 is set so that the polarity of the supply magnetic pole portion 34 that is radially opposed to the core magnetic pole portion 32 in one magnetic pole block 33. However, if the angle (high-speed rotation angle) is the same as the polarity of each magnet magnetic pole portion 31 in the one magnetic pole block 33, each magnetic pole block 33 functions as one magnetic pole. That is, the number of magnetic poles of the rotor 4 is four.

  Specifically, when the relative rotation angle between the rotor 4 and the magnetic flux supply body 35 is a high-speed rotation angle, the core magnetic pole portion 32 has the same polarity as the supply magnetic pole of each magnet magnetic pole portion 31 of the same magnetic pole block 33. It faces the part 34. Therefore, the magnetic flux supplied from the magnetic flux supplier 35 to the rotor 4 flows between the stator 3 and the core magnetic pole portion 32 in the opposite direction to the magnetic flux generated by the permanent magnet 23. The same polarity as that of the magnet magnetic pole portion 31 appears on the stator 3 side.

  More specifically, for example, the magnetic pole block 33 arranged at the upper left in the figure has an S-pole magnet magnetic pole portion 31, and the core magnetic pole portion 32 faces the S-pole supply magnetic pole portion 34. Therefore, a part of the magnetic flux that comes out of the N pole of the permanent magnet 23 enters the supply magnetic pole portion 34, and the magnetic flux that flows from the outer peripheral surface of the core magnetic pole portion 32 enters, and the core magnetic pole portion 32 becomes the S pole. Function as. Thereby, the same polarity appears in each magnet magnetic pole part 31 and core magnetic pole part 32 of this magnetic pole block 33, and this magnetic pole block 33 functions as one magnetic pole. Further, for example, the magnetic pole block 33 arranged at the upper right in the figure has an N-pole magnet magnetic pole portion 31, and the core magnetic pole portion 32 faces the N-pole supply magnetic pole portion 34. Therefore, a part of the magnetic flux emitted from the supply magnetic pole part 34 enters the south pole of the permanent magnet 23, and the other part flows out from the outer peripheral surface of the core magnetic pole part 32 to the stator 3 side. The core magnetic pole part 32 functions as an N pole. Thereby, the same polarity appears in each magnet magnetic pole part 31 and core magnetic pole part 32 of this magnetic pole block 33, and this magnetic pole block 33 functions as one magnetic pole.

Next, a configuration for maintaining the relative rotation angle between the rotor and the magnetic flux supplier will be described.
When the relative rotation angle of the magnetic flux supply body 35 is a high-speed rotation angle, the magnetic flux supply body 35 is held by a magnetic attractive force acting between the permanent magnet 23 and the supply body magnetic pole portion 34 (auxiliary magnet 52). . On the other hand, the magnetic flux supply body 35 is held by a holding mechanism 61 provided between the rotor 4 and the magnetic flux supply body 35 when the relative rotation angle is a high torque angle.

  Specifically, as shown in FIGS. 1 and 4, the holding mechanism 61 includes a bottomed cylindrical case 62 fixed to a connecting member 42 on one axial side (left side in FIG. 1) constituting the rotor 4. I have. The case 62 is fixed to the connecting member 42 at a circumferential position facing the core magnetic pole portion 32 disposed between the magnet magnetic pole portions 31 of one polarity (for example, S pole) in the radial direction. In the case 62, a rod-shaped first holding member 63 and a coil spring 64 as an engaging member for urging the first holding member 63 toward the magnetic flux supply body 35 are accommodated. A protruding first engaging portion 65 is formed at the tip of the first holding member 63. The first engagement portion 65 of the present embodiment is formed in a hemispherical shape, and the surface (outer surface) 65 a of the first engagement portion 65 is inclined with respect to the circumferential direction (rotation direction) of the rotor 4. . That is, in the present embodiment, the surface 65a corresponds to an inclined surface.

  On the other hand, a plurality of concave shapes (two in the present embodiment) in which the first engaging portion 65 is engaged with the coupling member 42 in the support member 53 of the magnetic flux supplier 35 facing the coupling member 42 in the axial direction. The second engaging portion 66 is formed. That is, in this embodiment, the support member 53 is configured as a second holding member. Each of the second engaging portions 66 is formed at a circumferential position opposite to the auxiliary magnet 52 arranged in the support member 53 so that the magnetic pole of the other polarity (for example, N pole) faces the radially outer side. ing. Further, the surface (inner surface) 66a of each second engaging portion 66 is formed in a hemispherical shape so that substantially the entire surface 65a of the first engaging portion 65 is in contact with it, and in the circumferential direction (rotating direction) of the rotor 4. It is inclined with respect to it. That is, in the present embodiment, the surface 66a corresponds to an inclined surface.

  Therefore, as shown in FIG. 4A, when the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is set to a high torque angle, the first engagement portion 65 is second engaged by the biasing force of the coil spring 64. Concave and convex engagement with the portion 66 is achieved. In this state, the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is held by the engaging force of the holding mechanism 61. Note that the urging force (elastic coefficient) of the coil spring 64 is such that the rotor 4 and the magnetic flux supplier 35 do not rotate relative to each other due to the magnetic attractive force and repulsive force acting between the permanent magnet 23 and the auxiliary magnet 52. The strength is set such that the engagement between the first engagement portion 65 and the second engagement portion 66 is not released. On the other hand, as shown in FIG. 4B, when the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is a high-speed rotation angle, the first engaging portion 65 of the first holding member 63 is supported by the support member 53. It touches the flat part in the opposite surface. In this state, the relative rotational angle between the rotor 4 and the magnetic flux supplier 35 is maintained by the magnetic attractive force acting between the permanent magnet 23 and the auxiliary magnet 52 as described above.

Next, the change of the relative rotation angle between the rotor and the magnetic flux supplier will be described.
As shown in FIG. 1 and FIGS. 2A and 2B, each tooth 12 of the stator 3 is provided with an adjustment coil 71 in addition to the coil 15. The connection end of the adjustment coil 71 is drawn out of the housing 2 and connected to the control device 6. And the control apparatus 6 changes the relative rotation angle of the rotor 4 and the magnetic flux supply body 35 by generating an adjustment magnetic pole in the site | part which opposes the core magnetic pole part 32 in radial direction by electricity supply to the adjustment coil 71. FIG. That is, in this embodiment, the angle adjustment device is configured by the adjustment coil 71 and the control device 6.

  Specifically, when the control device 6 changes the relative rotation angle between the rotor 4 and the magnetic flux supply body 35 from a high torque angle to a high speed rotation angle, the magnetic flux supply body 35 is in a high torque angle (FIG. 3 ( In a), an adjustment magnetic pole having a polarity opposite to that of each magnet magnetic pole portion 31 of the same magnetic pole block 33 is generated at a position facing the core magnetic pole portion 32. Then, as shown in FIG. 5A to FIG. 5B, the magnetic flux gradually stops flowing from the core magnetic pole portion 32 where the N pole appeared to the stator 3 side, and the core magnetic pole portion where the S pole appeared. The magnetic flux gradually stops flowing into the stator 32 from the stator 3 side. The direction of the magnetic flux passing through the core magnetic pole portion 32 gradually approaches the direction of the magnetic flux passing through each magnet magnetic pole portion 31 of the same magnetic pole block 33. As a result, a part of the magnetic flux emitted from the N pole of the permanent magnet 23 provided in the S pole magnet magnetic pole portion 31 flows into the supply magnetic pole portion 34 facing the adjacent magnetic pole block 33, and the N pole magnet magnetic pole portion. Magnetic flux flows from the supply magnetic pole portion 34 facing the magnetic pole block 33 adjacent to the S pole of the permanent magnet 23 provided in the portion 31. As a result, a magnetic attraction force acts between the permanent magnet 23 and the supply magnetic pole portion 34 (auxiliary magnet 52), whereby the first engagement portion 65 and the second engagement portion 66 are engaged. The relative rotation angle between the rotor 4 and the magnetic flux supply body 35 is stabilized at a high-speed rotation angle that is released and the magnetic flux supply body 35 rotates relative to each other and the polarity of the supply magnetic pole section 34 is the same as the polarity of the magnet magnetic pole section 31. (See FIG. 3B).

  On the other hand, when changing from a high-speed rotation angle to a high torque angle, the same magnetic pole block 33 is located at a position facing the core magnetic pole portion 32 in a state where the magnetic flux supplier 35 is at a high-speed rotation angle (see FIG. 3B). An adjustment magnetic pole having the same polarity as each magnet magnetic pole portion 31 is generated. Then, as shown in FIG. 6A to FIG. 6B, the magnetic flux gradually flows from the core magnetic pole portion 32 where the S pole appears to the stator 3 side, and the core magnetic pole portion 32 where the N pole appears. The magnetic flux gradually flows into the stator 3 side. The direction of the magnetic flux passing through the core magnetic pole portion 32 gradually approaches the opposite direction of the magnetic flux passing through the magnet magnetic pole portion 31 of the same magnetic pole block 33. As a result, a part of the magnetic flux emitted from the N pole supply magnetic pole part 34 flows into the S pole adjustment magnetic pole 72, and a part of the magnetic flux emitted from the N pole supply magnetic pole part 34 to the S pole supply magnetic pole part 34. It starts to flow. As a result, a magnetic attraction force acts between the adjustment magnetic pole 72 and the supply magnetic pole portion 34 (auxiliary magnet 52), whereby the magnetic flux supply body 35 rotates relatively, and the polarity of the supply magnetic pole portion 34 changes to the magnet magnetic pole. When a high torque angle that is opposite to the polarity of the portion 31 is reached, the relative angle of rotation between the rotor 4 and the magnetic flux supplier 35 is stabilized by the first engagement portion 65 engaging the second engagement portion 66 ( (Refer FIG.3 (b)).

  In addition, in the state where the number of magnetic poles in the rotor 4 is multipolarized and in the state where the number of magnetic poles is reduced, the relative position between the magnetic pole position of the rotor 4 and the magnetic pole generated in the stator 3 by energizing the coil 15 changes. When the energization direction to the coil 15 is the same, the rotation direction of the rotor 4 is reversed. Therefore, when changing the relative rotation angle between the rotor 4 and the magnetic flux supplier 35, the control device 6 switches the energization direction to the coil 15 together.

As described above, according to the present embodiment, the following operational effects can be achieved.
(1) The number of magnetic poles of the rotor 4 can be changed to 4 or 12 according to the relative rotation angle between the rotor 4 and the magnetic flux supplier 35. Here, when the rotational speed of the rotor 4 is the same, if the number of magnetic poles of the rotor 4 is small, the time required for switching the magnetic poles facing the coil 15 becomes long, and the amount of change in the interlinkage magnetic flux per unit time becomes small. . Since the induced voltage is proportional to the amount of change in the flux linkage per unit time, if the number of magnetic poles of the rotor 4 is small, the induced voltage becomes small and high-speed rotation is possible. That is, even if the design is such that a high torque can be output with the number of magnetic poles of the rotor 4 increased, the rotor 4 can be rotated at a high speed with the number of magnetic poles of the rotor 4 reduced. Therefore, the rotor 4 can be rotated at a high speed and a high torque can be output in a low-speed rotation range.

  (2) The relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is changed by causing the adjustment magnetic pole 72 to be generated in a portion facing the core magnetic pole portion 32 in the radial direction by energizing the adjustment coil 71. It is not necessary to incorporate a device for rotating the magnetic flux supply body 35 between the rotor 4 and the magnetic flux supply body 35, and the rotating electrical machine 1 can have a simple configuration.

  (3) When the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 becomes a high torque angle, the first engagement portion 65 of the first holding member 63 that rotates integrally with the rotor 4 and the second engagement of the magnetic flux supplier 35. By engaging the joint 66 with the concave and convex portions, the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is held at a high torque angle. Therefore, the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 can be firmly held at a high torque angle.

  (4) When the number of magnetic poles of the rotor 4 is 12 with respect to 9 slots, the winding coefficient indicating the effectiveness of the magnetic flux linked to the coil 15 is relatively high (a value close to “1”). Therefore, in this embodiment, the rotating electrical machine 1 can be driven efficiently. Further, when the number of magnetic poles of the rotor 4 is four with respect to the number of slots of nine, the winding coefficient becomes a relatively small value, so that it can be suitably rotated at high speed.

(Second Embodiment)
Next, a second embodiment will be described with reference to the drawings. The main difference between the present embodiment and the first embodiment is the configuration of the angle adjustment device. For this reason, for convenience of explanation, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

  As shown in FIGS. 7 and 8, the rotary electric machine 1 of the present embodiment is provided with an angle adjustment device 81 having a small motor 82. Note that a DC motor with a brush is adopted as the small motor 82 of the present embodiment. Moreover, the adjustment coil 71 is not provided in the teeth 12 of the stator 3 of this embodiment.

  Specifically, a tooth portion 83 is formed at the end portion of the support member 53 on the cover 8 side (right side in FIG. 7) so as to protrude radially outward over a predetermined circumferential range. The small motor 82 is fixed so as to be rotatable together with a connecting member 43 (rotor 4) provided on the cover 8 side. An installation groove 84 penetrating the inner and outer periphery of the connection member 43 and the core main body 41 is formed, and a small motor 82 is installed in the installation groove 84. A slip ring 85 is fixed to the outer periphery of the connecting member 43, and a brush 86 fixed to the cover 8 is in sliding contact with the slip ring 85. The small motor 82 is connected to the control device 6 via the slip ring 85 and the brush 86.

  A worm gear 87 as a drive gear is drivingly connected to the small motor 82. The tooth portion 88 of the worm gear 87 meshes with the tooth portion 83 formed on the support member 53 of the supply body core 51. Accordingly, the rotation of the worm gear 87 that is rotationally driven by the small motor 82 is transmitted to the support member 53, so that the magnetic flux supply body 35 rotates relative to the rotor 4. That is, in this embodiment, the support member 53 corresponds to a driven gear. The relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is adjusted between the high torque angle and the high speed rotation angle by the operation of the small motor 82. Note that the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is such that the tooth portion 83 of the support member 53 is connected via the worm gear 87 as described above, and therefore the holding torque (cogging torque) of the small motor 82. Held by.

As described above, according to the present embodiment, the following operational effects can be obtained in addition to the operational effects (1) and (4) of the first embodiment.
(5) By transmitting the rotation of the worm gear 87 driven to rotate by the small motor 82 to the support member 53 of the magnetic flux supplier 35, the relative rotational angle between the rotor 4 and the magnetic flux supplier 35 is changed. Therefore, the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 can be easily adjusted to an arbitrary angle between the high torque angle and the high speed rotation angle.

(Third embodiment)
Next, a third embodiment will be described with reference to the drawings. The main difference between the present embodiment and the first embodiment is the configuration of the rotor and the magnetic flux supplier. For this reason, for convenience of explanation, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

  As shown in FIGS. 9 and 10, the rotor 4 of this embodiment includes a rotor core 91 formed in a columnar shape and the permanent magnet 23. A fitting hole 92 penetrating in the axial direction is formed in the center of the rotor core 91, and the fitting hole 92 is press-fitted into the outer periphery of the rotating shaft 21 so as to be rotatable integrally with the rotating shaft 21. ing. The rotor core 91 is configured by laminating a plurality of electromagnetic steel plates.

  The rotor core 91 is formed with a plurality of cavities 93 and cavities 94 as in the first embodiment. The permanent magnet 23 is inserted into the hollow portion 93 and fixed to the rotor core 91, so that the magnet magnetic pole portion 31 and the core magnetic pole portion 32 are configured. In addition, a gap 95 is formed on the inner peripheral side of each magnetic pole block 33 to prevent the magnetic flux generated by the permanent magnet 23 from flowing to the inner peripheral side. Each gap 95 is formed in a substantially arc shape.

  As shown in FIGS. 9 and 11, the magnetic flux supplier 35 according to the present embodiment is arranged on the one end side in the axial direction of the rotor 4 (on the left side in FIG. 9) with an axial interval, and on the rotor 4. It is provided so as to be relatively rotatable. The magnetic flux supply body 35 includes a disk-shaped supply body core 101 and a plurality of auxiliary magnets 102 fixed to the supply body core 101.

  Specifically, a through hole 103 penetrating in the axial direction is formed at the center of the supply core 101. The supply core 101 is supported by the rotary shaft 21 through a bearing 104 provided in the through hole 103 so as to be relatively rotatable. An annular fixed groove 105 is formed on the surface of the supply core 101 facing the rotor 4. The supply core 101 is made of a magnetic material.

  As the auxiliary magnet 102, a segment magnet is used in which a cross-sectional shape perpendicular to the axial direction of the rotor 4 is formed in a fan-like plate shape. The width of the auxiliary magnet 102 along the circumferential direction is slightly smaller than the width of the magnetic pole block 33 along the circumferential direction. In addition, the auxiliary magnet 102 is inserted into the fixed groove 105 with a gap between the adjacent auxiliary magnets 102 and a space between the auxiliary magnet 102 and the inner peripheral side surface of the fixed groove 105. The auxiliary magnet 102 is magnetized in the plate thickness direction (the axial direction of the rotor 4) so that the polarities appearing on the rotor 4 side are alternately opposite along the circumferential direction. Thereby, in this embodiment, the auxiliary magnet 52 itself functions as the supply body magnetic pole part 34.

  The magnetic flux supply body 35 is held by a magnetic attractive force acting between the permanent magnet 23 and the supply body magnetic pole portion 34 (auxiliary magnet 102) when the relative rotation angle is a high-speed rotation angle. Is done. On the other hand, a holding mechanism 61 is provided between the rotor 4 and the magnetic flux supply body 35. The magnetic flux supply body 35 is held by the holding mechanism 61 when the relative rotation angle is a high torque angle. Is done. Further, the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is such that the adjustment magnetic pole 72 is generated at a portion facing the core magnetic pole portion 32 in the radial direction by energizing the adjustment coil 71 as in the first embodiment. It will be changed.

As described above, according to the present embodiment, the same operational effects as (1) to (4) of the first embodiment can be achieved.
In addition, each said embodiment can also be implemented in the following aspects which changed this suitably.

  In the first and third embodiments, for example, by changing the arrangement and shape of the permanent magnets 23, the balance between the rotor 4 and the magnetic force acting between the rotor 4 and the magnetic flux supplier 35 The holding mechanism 61 may be omitted as long as the relative rotation angle with the magnetic flux supplier 35 can be held at each of the high torque angle and the high speed rotation angle.

  In the first and third embodiments, the first engagement portion 65 has a convex shape and the second engagement portion 66 has a concave shape. However, the present invention is not limited to this, and the first engagement portion 65 has a concave shape. The second engaging portion 66 may have a convex shape.

  In the first and third embodiments, the surfaces 65a and 66a of the first and second engaging portions 65 and 66 are each formed in a hemispherical shape. However, the present invention is not limited thereto, and may be formed in a conical shape, for example. Good. In short, the surfaces 65a and 66a are inclined with respect to the circumferential direction, and the rotor 4 and the magnetic flux supply body 35 rotate relative to each other, whereby the first holding member 63 is pushed in the direction opposite to the biasing direction of the coil spring 64. The shape of the surfaces 65a and 66a can be appropriately changed as long as the shape is such that pressure is applied and the concave-convex engagement between the first engagement portion 65 and the second engagement portion 66 is released. Moreover, it is good also as a structure in which any one of the 1st and 2nd engaging parts 65 and 66 does not have the inclined surface inclined with respect to the circumferential direction.

  In the first and third embodiments, the coil spring 64 is used to engage the first engagement portion 65 of the first holding member 63 and the second engagement portion 66 of the support member 53. However, the present invention is not limited to this. Instead, for example, the first engagement portion 65 and the second engagement portion 66 may be engaged using another spring member such as a disc spring or an elastic body such as rubber.

  In the first embodiment, for example, the first holding member 63 and the coil spring 64 may be provided in the magnetic flux supplier 35, and the second engaging portion 66 may be formed in the connecting member 42 of the rotor 4. In this case, the connecting member 42 is the second holding member. Similarly, in the third embodiment, the first holding member 63 and the coil spring 64 may be provided in the magnetic flux supplier 35, and the second engaging portion 66 may be formed in the rotor core 91. In this case, the rotor core 91 serves as the second holding member.

  In the second embodiment, the worm gear 87 is used as the drive gear. However, the present invention is not limited thereto, and for example, a spur gear or the like may be used. Further, a driven gear (worm wheel or the like) having a tooth portion 83 that meshes with the worm gear 87 may be separately fixed to the supply body core 51.

In the second embodiment, a DC motor with a brush is used as the small motor 82. However, the present invention is not limited to this, and for example, a brushless motor or a stepping motor may be used.
In the second embodiment, the small motor 82 may be fixed so as to be integrated with the magnetic flux supply body 35, and the driven gear that meshes with the drive gear connected to the small motor 82 may be fixed so as to be rotatable integrally with the rotor 4. .

In the third embodiment, the magnetic flux supplier 35 may be provided on both axial sides of the rotor 4.
In the first and third embodiments, the rotor 4 and the magnetic flux supplier 35 are rotated relative to each other by generating the adjusting magnetic pole 72 at a portion facing the core magnetic pole portion 32 in the radial direction by energizing the adjusting coil 71. Changed the angle. However, the present invention is not limited to this. For example, the adjustment coil 71 is not provided in the stator 3 and the d-axis current supplied to the coil 15 is controlled to generate a magnetic pole at a portion facing the core magnetic pole portion 32 in the radial direction. 4 and the magnetic flux supplier 35 may be changed in relative rotation angle. In this configuration, since the coil 15 also functions as an adjustment coil, the rotating electrical machine 1 can be configured more simply.

  In each of the above embodiments, the configuration (angle adjusting device) for changing the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 can be changed as appropriate. For example, an auxiliary stator is provided on the inner peripheral side of the magnetic flux supplier 35, and the magnetic flux supplier 35 is rotated relative to the rotor 4 by generating a rotating magnetic field that acts on the magnetic pole portion 34 of the auxiliary stator. Also good. Further, for example, an inclined surface that is inclined along the circumferential direction is provided on the shaft end surface of the rotor 4, and a pin that reciprocates along the axial direction by the solenoid is pressed against the inclined surface, so that the magnetic flux supply body 35 is attached to the rotor 4. Relative rotation.

  In each of the above embodiments, only one permanent magnet 23 is provided in the magnet magnetic pole portion 31. However, the present invention is not limited to this. For example, as shown in FIG. 12A, the same polarity (N pole or A pair of permanent magnets 23a and 23b facing each other (S pole) may be provided. Needless to say, the permanent magnet 23 may have a shape other than the rectangular plate shape.

  In the first and second embodiments, the permanent magnet 23 is fixed in such a manner as to be embedded in the hollow portion 44 of the rotor core 22, but the present invention is not limited to this. For example, as shown in FIG. You may fix to the surface of 22. That is, the rotor 4 may be configured as a so-called surface magnet type rotor. Similarly, in the third embodiment, the permanent magnet 23 may be fixed to the surface of the rotor core 91.

  -In each above-mentioned embodiment, although auxiliary magnets 52 and 102 were fixed to the surface of supply body cores 51 and 101, it is not restricted to this, A hollow part is formed in supply body cores 51 and 101, and it is an aspect embedded in this hollow part. It may be fixed with. Alternatively, the number of auxiliary magnets 52 and 102 fixed to the supply body core 51 may be halved, and the magnetic flux supply body 35 may have a configuration similar to that of a so-called half magnet type (continuous pole type) rotor.

  In each of the above embodiments, for example, an annular ring magnet may be used as the auxiliary magnets 52 and 102. In this case, the magnetic flux supply body 35 may not be provided with the supply body cores 51 and 101, and the auxiliary magnets 52 and 102 themselves may be rotatably supported on the radially inner side of the rotor 4. That is, the magnetic flux supply body 35 may be configured by only the auxiliary magnets 52 and 102.

  In the first embodiment, for example, as illustrated in FIG. 12C, a gap 111 may be formed between adjacent magnet magnetic pole portions 31 in the core body 41. By configuring in this way, it is possible to reduce the magnetic flux generated by the permanent magnet 23 from flowing to the adjacent magnet magnetic pole portion 31 in a state where the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is a high torque angle. Since the magnetic flux flows toward the core magnetic pole part 32, the magnetic flux passing between the stator 3 and the core magnetic pole part 32 can be increased.

  For example, as shown in FIG. 12 (d), an additional magnet 112 may be provided between the magnet magnetic pole portions 31. The additional magnet 112 has the same polarity as the polarity of the supply magnetic pole portion 34 facing the magnet magnetic pole portion 31 in a state where the relative rotation angle between the rotor 4 and the magnetic flux supply body 35 is a high torque angle. As shown on the side, the additional magnet 112 is magnetized in the plate thickness direction (direction substantially along the circumferential direction of the rotor 4). With this configuration, the magnetic flux generated by the additional magnet 112 flows toward the core magnetic pole portion 32 in a state where the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is a high torque angle. 3 and the core magnetic pole portion 32 can effectively increase the magnetic flux passing between them.

Similarly in the second or third embodiment, a gap or an additional magnet may be provided between the magnet magnetic pole portions 31.
In each of the above embodiments, the air gap 45 may not be formed between each magnet magnetic pole portion 31 and the core magnetic pole portion 32.

  In each of the above embodiments, the number of slots of the stator 3 is nine and the number of magnetic poles of the rotor 4 can be changed to four or twelve, but this is not limiting, and the number of slots and the number of magnetic poles can be changed as appropriate. is there.

  In each of the above embodiments, the rotary electric machine 1 is configured as an inner rotor type radial gap motor, but is not limited thereto, and may be configured as an outer rotor type radial gap motor. Moreover, you may comprise the rotary electric machine 1 as an axial gap motor. In this case, it is preferable to adopt the structure of the rotor 4 and the magnetic flux supplier 35 shown in the fourth embodiment.

  In each of the above embodiments, the center position in the circumferential direction of the supply pole part 34 is the core pole part in each of the case where the relative angle between the rotor 4 and the magnetic flux supplier 35 is a high torque angle and the high speed rotation angle. It was made to oppose the circumferential center position of 32 in radial direction. However, the present invention is not limited to this, and the circumferential center position of the supply magnetic pole portion 34 may not be opposed to the circumferential center position of the core magnetic pole portion 32. The supply magnetic pole part 34 having the opposite polarity to the magnet magnetic pole part 31 of the magnetic pole block 33 only needs to face the core magnetic pole part 32. Similarly, when the magnetic flux supply body 35 is set to a high-speed rotation angle, the supply magnetic pole portion 34 having the same polarity as the magnet magnetic pole portion 31 of the same magnetic pole block 33 may be opposed to the core magnetic pole portion 32.

  Further, when the relative angle between the rotor 4 and the magnetic flux supplier 35 is set to a high torque angle, all the supply magnetic pole portions 34 facing the core magnetic pole portion 32 are in the same magnetic pole block 33 as the core magnetic pole portion 32. The polarity does not have to be opposite to the polarity of each magnet magnetic pole portion 31. For example, one supply magnetic pole portion 34 may not have the opposite polarity to the polarity of each magnet magnetic pole portion 31 in the same magnetic pole block 33. . Similarly, when the relative angle between the rotor 4 and the magnetic flux supplier 35 is a high-speed rotation angle, all the supply magnetic pole portions 34 facing the core magnetic pole portion 32 are in the same magnetic pole block 33 as the core magnetic pole portion 32. The polarity of each magnet magnetic pole portion 31 may not be the same as the polarity of each magnet magnetic pole portion 31. For example, one supply magnetic pole portion 34 may not have the same polarity as the polarity of each magnet magnetic pole portion 31 in the same magnetic pole block 33. Good.

  In each of the above-described embodiments, each of the magnet magnetic pole portions 31 of the magnetic pole block 33 having the same polarity of the core magnetic pole portion 32 in the state in which the auxiliary magnet 52 has the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 set to a high-speed rotation angle. It was magnetized to the strength that can supply the same amount of magnetic flux. However, the present invention is not limited to this, and each magnet magnetic pole part 31 of the magnetic pole block 33 having the same polarity of the core magnetic pole part 32 in the state where the auxiliary magnet 52 has the high rotational speed as the relative rotational angle between the rotor 4 and the magnetic flux supplier 35. The magnet may be magnetized to such a strength that only an amount of magnetic flux can be supplied which remains opposite to the polarity of. Even in this case, when the relative rotation angle between the rotor 4 and the magnetic flux supply body 35 is set to a high-speed rotation angle, the magnetic flux supplied from the magnetic flux supply body 35 to the rotor 4 is permanent between the stator 3 and the core magnetic pole portion 32. It flows in the direction opposite to the magnetic flux generated by the magnet 23. Therefore, the magnetic flux passing between the stator 3 and the core magnetic pole portion 32 is reduced as compared with the case where the relative rotation angle between the rotor 4 and the magnetic flux supplier 35 is set to a high torque angle. As a result, the induced voltage can be kept small, and the rotor 4 can be rotated at a high speed.

  In each of the above embodiments, the rotating electrical machine 1 is used as a drive source for an electric vehicle or a hybrid vehicle. However, the present invention is not limited thereto, and may be used as a drive source for other devices such as an electric power steering device. It may be used as a generator.

Next, technical ideas that can be understood from the above embodiments and other examples will be described below together with their effects.
(A) A rotating electrical machine in which a magnetoresistive portion having a high magnetoresistance is provided between adjacent magnetic pole blocks. According to the above configuration, in a state where the relative rotation angle between the rotor and the magnetic flux supplier is a high torque angle, it is possible to reduce the magnetic flux generated by the permanent magnet from flowing to the adjacent magnetic pole part side, and to the core magnetic pole part side. Since it comes to flow, the magnetic flux which passes between between a stator and a core magnetic pole part can be increased.

  (B) An additional magnet is provided between the adjacent magnetic pole blocks, and the additional magnet faces the magnet magnetic pole portion in a state where the relative rotation angle between the rotor and the magnetic flux supplier is the high torque angle. The rotating electric machine is magnetized so that the same polarity as the polarity of the supply magnetic pole portion appears on the magnet magnetic pole portion side. According to the above configuration, since the magnetic flux generated by the additional magnet flows to the core magnetic pole part side in a state where the relative rotation angle between the rotor and the magnetic flux supplier is a high torque angle, the stator and the core magnetic pole part The magnetic flux passing between them can be effectively increased.

  DESCRIPTION OF SYMBOLS 1 ... Rotary electric machine, 3 ... Stator, 4 ... Rotor, 6 ... Control apparatus, 12 ... Teeth, 13 ... Stator core, 15 ... Coil, 21 ... Rotating shaft, 22, 91 ... Rotor core, 23, 23a, 23b ... Permanent magnet, DESCRIPTION OF SYMBOLS 31 ... Magnet magnetic pole part, 32 ... Core magnetic pole part, 33 ... Magnetic pole block, 34 ... Supply body magnetic pole part, 35 ... Magnetic flux supply body, 41 ... Core main body, 44, 93 ... Hollow part, 45, 94, 95, 111 ... Gaps, 51, 101 ... Supply core, 52, 102 ... Auxiliary magnet, 61 ... Holding mechanism, 63 ... First holding member, 64 ... Coil spring, 65 ... First engaging portion, 66 ... Second engaging portion, 71 ... Adjustment coil, 72 ... Adjustment magnetic pole, 81 ... Angle adjustment device, 82 ... Small motor, 87 ... Worm gear, 112 ... Additional magnet.

Claims (6)

A stator having a stator core and coils provided on teeth of the stator core;
In a rotating electrical machine comprising a rotor core fixed to a rotating shaft so as to be integrally rotatable, and a rotor having a permanent magnet fixed to the rotor core,
The rotor is divided into a plurality of magnetic pole blocks,
Each of the magnetic pole blocks has two magnet magnetic pole portions in which the same polarity according to the polarity of the permanent magnet appears, and a core magnetic pole portion disposed between the two magnet magnetic pole portions,
The plurality of magnetic pole blocks are arranged such that the magnet magnetic pole part in one magnetic pole block and the magnet magnetic pole part in the other magnetic pole block have different polarities and are adjacent in the circumferential direction,
A magnetic flux supplier that is supported so as to be relatively rotatable with respect to the rotor and in which supply magnetic pole portions of different polarities are formed side by side in the circumferential direction;
An electric rotating machine comprising: an angle adjusting device that adjusts a relative rotation angle between the rotor and the magnetic flux supplier between a high torque angle and a high-speed rotation angle. In the rotating electrical machine according to claim 1,
The high torque angle is an angle at which the supply magnetic pole portion facing the core magnetic pole portion in one magnetic pole block has a polarity opposite to the polarity of each magnet magnetic pole portion in the one magnetic pole block. ,
The high-speed rotation angle is an angle at which the supply magnetic pole portion facing the core magnetic pole portion in one magnetic pole block has the same polarity as the polarity of each magnet magnetic pole portion in the one magnetic pole block. Rotating electric machine characterized by that. The rotating electrical machine according to claim 2,
In the magnetic flux supply body, the polarity of the core magnetic pole portion is the polarity of each magnet magnetic pole portion in one magnetic pole block in a state where the relative rotation angle between the rotor and the magnetic flux supply body is the high-speed rotation angle. The rotating electrical machine is configured to be able to supply an amount of magnetic flux that is the same as that of the rotating electric machine. In the rotary electric machine according to any one of claims 1 to 3,
The angle adjusting device includes:
An adjustment coil provided in the teeth;
A rotating electric machine comprising: a control device that generates an adjustment magnetic pole at a portion facing the core magnetic pole portion by energization of the adjustment coil. In the rotating electrical machine according to claim 4,
A first holding member that rotates integrally with one of the rotor and the magnetic flux supplier, and has a first engagement portion;
A second engagement that rotates integrally with the other of the rotor and the magnetic flux supply body and maintains the relative rotation angle between the rotor and the magnetic flux supply body at the high torque angle by engaging with the first engagement portion. A second holding member formed with a joint portion;
An engagement member for engaging the first holding member and the second holding member;
At least one of the first and second engaging portions has an inclined surface inclined with respect to the circumferential direction,
When the relative rotation angle between the rotor and the magnetic flux supply body is at the high torque angle, the inclined surface rotates relative to the first engagement portion when the rotor and the magnetic flux supply body rotate relative to each other. A rotating electrical machine formed so as to be disengaged from the second engaging portion. In the rotary electric machine according to any one of claims 1 to 3,
The angle adjusting device includes:
A small motor that rotates integrally with one of the rotor and the magnetic flux supplier;
A drive gear drivingly connected to the small motor;
A rotating electrical machine comprising a driven gear that rotates integrally with the other of the rotor and the magnetic flux supplier and meshes with the drive gear.