JP2014166023A - Rotary electric machine system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement torque amplification while suppressing an inverse electromotive voltage generated in a winding, in a rotary electric machine system where torque can act between a first rotor and a second rotor and between a stator and the second rotor.SOLUTION: By controlling a d-axis current of a rotor winding 30 in such a manner that a d-axis magnetic flux of the rotor winding 30 weakens a field magnetic flux of a permanent magnet 33 flowing to an input-side rotor 28 and strengthens a field magnetic flux of the permanent magnet 33 flowing to a stator 16, while suppressing an inverse electromotive voltage of the rotor winding 30, torque between the stator 16 and an output-side rotor 18 is amplified. By controlling a d-axis current of a stator winding 20 in such a manner that a d-axis magnetic flux of the stator winding 20 weakens the field magnetic flux of the permanent magnet 33 flowing to the stator 16 and strengthens the field magnetic flux of the permanent magnet 33 flowing to the input-side rotor 28, while suppressing an inverse electromotive voltage of the stator winding 20, torque between the input-side rotor 28 and the output-side rotor 18 is amplified.

Description

  The present invention relates to a rotating electrical machine system, and more particularly, to a rotating electrical machine system capable of applying torque between a first rotor and a second rotor and between a stator and a second rotor.

  The related art of this type of rotating electrical machine system is disclosed in Patent Document 1 below. The rotating electrical machine system according to Patent Document 1 includes a first rotor that is provided with windings and mechanically coupled to an engine, and a permanent magnet that is electromagnetically coupled to the windings of the first rotor and is provided with a machine on a drive shaft. Connected second rotor, a stator having a winding electromagnetically coupled to the permanent magnet of the second rotor, a slip ring electrically connected to the winding of the first rotor, and a slip A brush in electrical contact with the ring, a first inverter for controlling power transfer between the battery and the stator winding, and between the battery and the first rotor winding via the slip ring and the brush. And a second inverter that controls to be able to exchange power. In Patent Document 1, the power transmitted from the engine to the first rotor is transmitted to the second rotor by electromagnetic coupling between the windings of the first rotor and the permanent magnets of the second rotor. The drive shaft can be driven. Further, the electromagnetic force between the stator winding and the permanent magnet of the second rotor allows the second rotor to generate power by using the electric power supplied to the stator winding via the first inverter. The shaft can be driven.

  In Patent Document 1, in order to increase the maximum torque that can be generated between the first rotor and the second rotor and the maximum torque that can be generated between the stator and the second rotor, the first rotor is made by the permanent magnet of the second rotor. It is desirable to increase the field magnetic flux flowing through the stator. On the other hand, in order to reduce the counter electromotive voltage generated in the windings of the first rotor and the stator, the field magnetic flux flowing through the first rotor and the stator can be reduced by the permanent magnet of the second rotor. desirable. Therefore, it is desirable that the field magnetic flux flowing through the first rotor and the stator can be controlled by the permanent magnet of the second rotor. However, if a field winding for controlling the field magnetic flux is separately added to the second rotor, it is necessary to add a slip ring and a brush separately in order to pass a current through the field winding of the second rotor. This leads to a complicated configuration.

  Therefore, in Patent Document 1, the permanent magnet of the second rotor that causes the field magnetic flux to act on the first rotor and the stator is made common, and one of the N pole and S pole of the permanent magnet is disposed opposite to the first rotor, and the permanent magnet is made permanent. The other of the N pole and S pole of the magnet is disposed opposite to the stator via a magnetic material. When torque is applied between the first rotor and the second rotor, the direction of the magnetic flux generated by the alternating current flowing through the stator winding is the same as the direction of the magnetic flux generated by the permanent magnet (strong field direction). In this way, an alternating current (d-axis current) is passed through the winding of the stator to execute a field-enhancing control for increasing the amount of field magnetic flux flowing through the first rotor by the permanent magnet of the second rotor. On the other hand, by passing an alternating current (d-axis current) through the stator winding so that the direction of the magnetic flux generated by the alternating current flowing through the stator winding is opposite to the direction of the magnetic flux generated by the permanent magnet (field weakening direction). The field weakening control is executed to reduce the amount of field magnetic flux flowing through the first rotor by the permanent magnet of the second rotor. When torque is applied between the stator and the second rotor, the direction of the magnetic flux generated by the alternating current flowing through the winding of the first rotor is the same direction as the direction of the magnetic flux generated by the permanent magnet (strong field direction). In addition, by flowing an alternating current (d-axis current) through the windings of the first rotor, the strong field control is executed to increase the amount of field magnetic flux flowing to the stator by the permanent magnet of the second rotor. On the other hand, the alternating current (d-axis current) is applied to the winding of the first rotor so that the direction of the magnetic flux generated by the alternating current flowing in the winding of the first rotor is opposite to the direction of the magnetic flux generated by the permanent magnet (field weakening direction). The field weakening control is executed to reduce the amount of field magnetic flux flowing to the stator by the permanent magnet of the second rotor.

JP 2011-205741 A Japanese Patent No. 3543500 JP 2009-73472 A JP 2009-274536 A

  In Patent Document 1, since the permanent magnet of the second rotor is disposed between the first rotor and the stator, the magnetic flux due to the alternating current (d-axis current) flowing through the stator winding is less likely to act on the first rotor. It becomes difficult to influence the amount of field magnetic flux flowing through one rotor. Similarly, the magnetic flux due to the alternating current (d-axis current) flowing through the windings of the first rotor is less likely to act on the stator, and the amount of field magnetic flux flowing through the stator is less likely to be affected. Therefore, it is difficult to efficiently control the field magnetic flux flowing through the first rotor and the stator.

  Furthermore, in Patent Document 1, when an AC current (d-axis current) is passed through the stator winding, the field magnet flux that flows in the first rotor is increased by the permanent magnet of the second rotor. Since the magnetic flux linked to the stator winding also increases, the back electromotive force generated in the stator winding increases. On the other hand, when performing field weakening control in which the amount of field magnetic flux flowing to the first rotor is reduced by the permanent magnet of the second rotor by passing an alternating current (d-axis current) through the stator winding, the winding of the stator is performed. Since the magnetic flux linked to the wire is also reduced, the torque acting between the stator and the second rotor is reduced. Similarly, when executing strong field control for increasing the amount of field magnetic flux flowing to the stator by the permanent magnet of the second rotor by passing an alternating current (d-axis current) through the winding of the first rotor, Since the magnetic flux linked to the rotor winding also increases, the back electromotive voltage generated in the first rotor winding increases. On the other hand, when performing field-weakening control that reduces the amount of field magnetic flux flowing to the stator by the permanent magnet of the second rotor by passing an alternating current (d-axis current) through the winding of the first rotor, the first rotor Since the magnetic flux interlinked with the windings of the coil is also reduced, the torque acting between the first rotor and the second rotor is reduced.

  The present invention provides a rotating electrical machine system capable of applying a torque between a first rotor and a second rotor and between a stator and a second rotor without complicating the configuration. One of the purposes is to efficiently control the magnetic flux flowing through the first rotor and the stator.

  Further, the present invention relates to the reverse generated in the winding in the rotating electrical machine system capable of applying torque between the first rotor and the second rotor and between the stator and the second rotor. One of the purposes is to realize torque amplification while suppressing electromotive voltage.

  The rotating electrical machine system according to the present invention employs the following means in order to achieve at least a part of the above-described object.

  The rotating electrical machine system according to the present invention has a first rotor provided with a rotor winding, a stator provided with a stator winding, a first rotor and a stator, and a first rotor. A second rotor that is rotatable relative to the rotor, wherein the second rotor is disposed between a plurality of magnets spaced apart from each other in the circumferential direction and each magnet adjacent to the circumferential direction. Each soft magnetic material includes a first surface facing the first rotor, a second surface facing the stator, and a magnetic pole of one magnet adjacent in the circumferential direction. A third surface facing the surface and a fourth surface facing the magnetic pole surface of the other magnet adjacent in the circumferential direction, passing magnetic flux between the first surface and the second surface, and further, the third surface When the magnetic pole surface of the magnet facing the magnet and the magnetic pole surface of the magnet facing the fourth surface are of the same polarity, and both of these magnetic pole surfaces are N poles, the magnetic flux generated by the magnet is third. When the magnetic pole surfaces are both S poles, the magnetic flux from the magnet flows from the first and second surfaces to the third and fourth surfaces, and the rotor windings flow from the fourth surface to the first and second surfaces. Torque acts between the first rotor and the second rotor due to the interaction between the alternating current flowing through the magnetic field and the magnetic flux generated by the magnet flowing between the first surface and the third and fourth surfaces of the soft magnetic material. Torque acts between the stator and the second rotor due to the interaction between the alternating current flowing through the winding and the magnetic flux generated by the magnet flowing between the second surface and the third and fourth surfaces of the soft magnetic material, When an alternating current flows through the rotor winding and the stator winding, the magnetic flux generated by the alternating current in the rotor winding weakens one of the magnetic flux generated by the magnet acting on the first rotor and the magnetic flux generated by the magnet acting on the stator. In addition, the control of flowing an alternating current through the rotor winding so as to strengthen the other, and the alternating current of the stator winding Executing at least one of the control of causing an alternating current to flow through the stator winding so that one of the magnetic flux by the magnet acting on the first rotor and the magnetic flux by the magnet acting on the stator is weakened and the other is strengthened The gist.

  In one aspect of the present invention, when an alternating current flows through the rotor winding and the stator winding, the magnetic flux generated by the alternating current in the rotor winding weakens the magnetic flux generated by the magnet that acts on the first rotor and the stator. It is preferable to control the alternating current flowing through the rotor winding so as to increase the magnetic flux generated by the acting magnet.

  In one aspect of the present invention, when an alternating current flows through the rotor winding and the stator winding, the magnetic flux generated by the alternating current in the stator winding weakens the magnetic flux generated by the magnet that acts on the stator and acts on the first rotor. It is preferable to control the alternating current flowing in the stator winding so as to increase the magnetic flux generated by the acting magnet.

  In one aspect of the present invention, when an alternating current flows through the rotor winding and the stator winding, the magnetic flux due to the alternating current in the rotor winding and the magnetic flux due to the alternating current in the stator winding repel each other. It is preferable to control the alternating current flowing through the rotor winding and the alternating current flowing through the stator winding.

  In one embodiment of the present invention, it is preferable that a gap or a nonmagnetic material is provided between soft magnetic materials adjacent in the circumferential direction.

  In one embodiment of the present invention, it is preferable that no air gap and non-magnetic material are provided inside each soft magnetic material.

  The rotating electrical machine system according to the present invention is opposed to the first rotor provided with the rotor winding, the stator provided with the stator winding, the first rotor and the stator, A second rotor that is rotatable relative to the first rotor, the second rotor including a plurality of soft magnetic materials spaced apart from each other in the circumferential direction, and adjacent to the circumferential soft A gap or a nonmagnetic material is provided between the magnetic materials, and each soft magnetic material has a first surface facing the first rotor and a second surface facing the stator, and the first surface and the first surface A magnetic flux is passed between the two surfaces to pass an alternating current through the rotor winding, and a magnetic flux generated by the alternating current through the stator winding flows between the second and first surfaces of the soft magnetic material and acts on the first rotor. By causing an alternating current to flow through the stator winding so that torque acts between the first rotor and the second rotor, an alternating current flows through the stator winding, The stator and the second rotation are caused by flowing an alternating current through the rotor winding so that the magnetic flux caused by the alternating current of the rotor winding flows between the first and second surfaces of the soft magnetic material and acts on the stator. The gist is that torque acts between the children.

  ADVANTAGE OF THE INVENTION According to this invention, in the rotary electric machine system which can make a torque act between a 1st rotor and a 2nd rotor and between a stator and a 2nd rotor, complication of a structure is caused. Without this, the magnetic flux flowing through the first rotor and the stator can be controlled efficiently.

  Further, according to the present invention, in the rotating electrical machine system capable of applying torque between the first rotor and the second rotor and between the stator and the second rotor, the coil is generated in the winding. Thus, torque amplification can be realized while suppressing the back electromotive voltage.

It is a figure which shows schematic structure of a hybrid drive device provided with the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows schematic structure of the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows schematic structure of the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows schematic structure of the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows the flow of the d-axis magnetic flux when the d-axis current flows through the rotor winding. It is a figure which shows the flow of the q-axis magnetic flux when the q-axis current flows into the rotor winding. It is a figure which shows the flow of d-axis magnetic flux in case a d-axis current flows into a stator winding. It is a figure which shows the flow of the q-axis magnetic flux when the q-axis current flows through the stator winding. It is a figure which shows the torque between a stator and an output side rotor in the case of supplying an alternating current to both a rotor winding and a stator winding. It is a figure which shows the torque between the input side rotor and output side rotor when an alternating current is sent through both a rotor winding and a stator winding. It is a figure which shows the flow of the magnetic flux when the rotor winding 30 and the stator winding 20 generate field weakening magnetic flux at the same time. It is a figure which shows an example of the functional block diagram of the electronic control unit for controlling the alternating current which flows into a stator winding, and the alternating current which flows into a rotor winding. It is a figure which shows the other schematic structure of the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine system which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine system which concerns on embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  1-4 is a figure which shows the outline of a structure of a hybrid drive system provided with the rotary electric machine system which concerns on embodiment of this invention, FIG. 1 shows the outline of the whole structure, FIGS. The outline of a structure is shown. The hybrid drive system according to the present embodiment is provided between an engine (internal combustion engine) 36 provided as a prime mover capable of generating power (mechanical power), and between the engine 36 and a drive shaft 37 (wheel 38). A transmission (mechanical transmission) 44 capable of changing the transmission ratio, and a rotating electrical machine 10 provided between the engine 36 and the transmission 44 and capable of generating power (mechanical power) and generating power. Prepare. Note that the hybrid drive system according to the present embodiment can be used as a power output system for driving a vehicle, for example.

  The rotating electrical machine 10 includes a stator (stator) 16 fixed to a stator case (not shown), a first rotor (first rotor) 28 that can rotate relative to the stator 16, and a radial direction orthogonal to the rotor rotation axis. The stator 16 and the first rotor 28 are opposed to each other with a predetermined gap, and a second rotor (second rotor) 18 that can rotate relative to the stator 16 and the first rotor 28 is provided. In the example shown in FIGS. 1 to 4, the stator 16 is disposed at a position radially outward from the first rotor 28 with a space from the first rotor 28, and the second rotor 18 is in contact with the stator 16 in the radial direction. It is disposed at a position between the first rotor 28. That is, the first rotor 28 is disposed opposite to the second rotor 18 at a position radially inward of the second rotor 18, and the stator 16 is disposed opposite to the second rotor 18 at a position radially outward from the second rotor 18. Has been. Since the first rotor 28 is mechanically connected to the engine 36, the power from the engine 36 is transmitted to the first rotor 28. On the other hand, the second rotor 18 is mechanically coupled to the drive shaft 37 via the transmission 44, so that the power from the second rotor 18 is shifted by the transmission 44 to the drive shaft 37 (wheel 38). It is transmitted after. In the following description, the first rotor 28 is an input side rotor, and the second rotor 18 is an output side rotor.

  The stator 16 includes a stator core (stator core) 51 and a plurality of (for example, three-phase) stator windings (stator windings) 20 disposed on the stator core 51 along the circumferential direction thereof. In the stator core 51, a plurality of teeth 51a protruding radially inward (toward the output-side rotor 18) are arranged at intervals along the circumferential direction of the stator, and each stator winding 20 is formed of these teeth 51a. The magnetic poles are configured by being wound around. When a plurality of phases (for example, three phases) of alternating current flows through the plurality of stator windings 20, the stator windings 20 can generate a rotating magnetic field that rotates in the stator circumferential direction. In the example shown in FIGS. 3 and 4, one magnetic pole is formed for each of the six teeth 51 a around which the three-phase stator winding 20 is wound.

  The input-side rotor 28 includes a rotor core (rotor core) 52 and a plurality of (for example, three-phase) rotor windings (rotor windings) 30 disposed on the rotor core 52 along the circumferential direction thereof. . In the rotor core 52, a plurality of teeth 52a protruding radially outward (toward the output-side rotor 18) are arranged at intervals along the circumferential direction of the rotor, and each rotor winding 30 is formed of these teeth 52a. The magnetic poles are configured by being wound around. When a plurality of phases (for example, three phases) of alternating current flows through the plurality of rotor windings 30, the rotor windings 30 can generate a rotating magnetic field that rotates in the circumferential direction of the rotor. In the example shown in FIGS. 3 and 4, one magnetic pole is formed for each of the three teeth 52 a around which the three-phase rotor winding 30 is wound.

  The output-side rotor 18 has a plurality (16 in the example shown in FIGS. 3 and 4) of permanent magnets 33 that are spaced apart from each other (equally spaced) in the circumferential direction of the rotor and are adjacent to each other in the circumferential direction of the rotor. A plurality of soft magnetic materials 53 (same number as the permanent magnets 33, 16 in the example shown in FIGS. 3 and 4) disposed between the permanent magnets 33. Each of the plurality of soft magnetic materials 53 divided and arranged at equal intervals in the circumferential direction of the rotor includes an inner peripheral surface (first surface) 61 facing the input-side rotor 28 (tooth 52a) with a predetermined gap, and a stator. 16 (teeth 51a) and an outer peripheral surface (second surface) 62 facing a predetermined gap, a side surface (third surface) 63 facing (contacting) the magnetic pole surface of one of the adjacent permanent magnets 33, A side surface (fourth surface) 64 that faces (contacts) the magnetic pole surface of the other adjacent permanent magnet 33, and allows magnetic flux to pass between the inner peripheral surface 61 and the outer peripheral surface 62. In the example shown in FIGS. 3 and 4, the magnetic pole surface of each permanent magnet 33 is arranged to be inclined with respect to the radial direction, and the side surfaces 63 and 64 of each soft magnetic material 53 are also inclined to the radial direction. Yes. In the example shown in FIGS. 3 and 4, in each soft magnetic material 53, the rotor circumferential width of the inner circumferential surface 61 is equal to the interval between the teeth 52 a that are separated by three in the rotor circumferential direction, and the rotor on the outer circumferential surface 62. The circumferential width is equal to the spacing between the teeth 51a that are separated by six in the rotor circumferential direction. In the following description, when it is necessary to distinguish between the plurality of permanent magnets 33, the following description will be made using the reference numerals 33-1, 33-2, 33-3. And when it is necessary to distinguish the some soft-magnetic material 53, it demonstrates using the code | symbol of 53-1, 53-2 hereafter, and the inner peripheral surface 61 of the soft-magnetic material 53, the outer peripheral surface 62, the side surface 63, 64 will be described below using reference numerals 61-1, 61-2, 62-1, 62-2, 63-1, 63-2, 64-1, 64-2.

  In each soft magnetic material 53, the magnetic pole surface of the permanent magnet 33 facing the side surface 63 and the magnetic pole surface of the permanent magnet 33 facing the side surface 64 have the same polarity, and the same polarity of the permanent magnet 33 adjacent in the circumferential direction of the rotor. The two are connected via a soft magnetic material 53. For example, in the soft magnetic material 53-1, the magnetic pole surface of the permanent magnet 33-1 in contact with the side surface 63-1 is the N pole surface, and the magnetic pole surface of the permanent magnet 33-2 in contact with the side surface 64-1 is the N pole. Surface. On the other hand, in the soft magnetic material 53-2 adjacent to the soft magnetic material 53-1 in the circumferential direction of the rotor across the permanent magnet 33-2, the magnetic pole surface of the permanent magnet 33-2 facing the side surface 63-2 is the S pole. The magnetic pole surface of the permanent magnet 33-3 that is a surface and is in contact with the side surface 64-2 is the S pole surface. Therefore, in the soft magnetic material 53 (for example, soft magnetic materials 53-1, 53-2) adjacent in the rotor circumferential direction, the magnetic pole surfaces of the permanent magnet 33 facing the side surfaces 63, 64 have opposite polarities. In the circumferential direction, the soft magnetic material 53 whose side surfaces 63 and 64 are in contact with the N pole surface of the permanent magnet 33 and the soft magnetic material 53 whose side surfaces 63 and 64 are in contact with the S pole surface of the permanent magnet 33 are alternately arranged. . In addition to the permanent magnet 33, a gap 54 for increasing the magnetic resistance is provided between the soft magnetic materials 53 (for example, soft magnetic materials 53-1, 53-2) adjacent in the rotor circumferential direction. . It is also possible to provide a nonmagnetic material instead of the gap 54. However, soft magnetic materials 53 (for example, soft magnetic materials 53-1 and 53-2) adjacent in the circumferential direction of the rotor may be connected by a bridge.

  The flow of the field magnetic flux by the permanent magnet 33 is shown in FIG. As shown by the arrow in FIG. 4, in the soft magnetic material 53-1, the field magnetic flux generated by the permanent magnet 33-1 flows from the side surface 63-1 to the inner peripheral surface 61-1 and the outer peripheral surface 62-1, and is permanent. Field magnetic flux generated by the magnet 33-2 flows from the side surface 64-1 to the inner peripheral surface 61-1 and the outer peripheral surface 62-1. For the input-side rotor 28, the inner peripheral surface 61-1 of the soft magnetic material 53-1 functions as an N pole surface, and the field magnetic flux is input to the input side from the inner peripheral surface 61-1 of the soft magnetic material 53-1. It acts on the rotor 28 (the teeth 52a). For the stator 16, the outer peripheral surface 62-1 of the soft magnetic material 53-1 functions as an N-pole surface, and the field magnetic flux is transferred from the outer peripheral surface 62-1 of the soft magnetic material 53-1 to the stator 16 (tooth 51a). Act on. On the other hand, in the soft magnetic material 53-2, the field magnetic flux generated by the permanent magnet 33-2 flows from the inner peripheral surface 61-2 and the outer peripheral surface 62-2 to the side surface 63-2, and the field magnet generated by the permanent magnet 33-3. Magnetic flux flows from the inner peripheral surface 61-2 and the outer peripheral surface 62-2 to the side surface 63-3. For the input side rotor 28, the inner peripheral surface 61-2 of the soft magnetic material 53-2 functions as an S pole surface, and the field magnetic flux is transferred from the input side rotor 28 (tooth 52a) to the soft magnetic material 53-2. It acts on the inner peripheral surface 61-2. For the stator 16, the outer peripheral surface 62-2 of the soft magnetic material 53-2 functions as an S pole surface, and the field magnetic flux is transferred from the stator 16 (tooth 51a) to the outer peripheral surface 62-2 of the soft magnetic material 53-2. Act on. Thus, the inner peripheral surface 61 and the outer peripheral surface 62 of the same soft magnetic material 53 function as magnetic pole surfaces having the same polarity. In the circumferential direction of the rotor, the inner peripheral surface 61 that functions as the N pole surface and the inner peripheral surface 61 that functions as the S pole surface are alternately arranged, and functions as the outer peripheral surface 62 that functions as the N pole surface and the S pole surface. The outer peripheral surfaces 62 are alternately arranged. In each soft magnetic material 53, magnetic flux can be easily passed between the inner peripheral surface 61 and the outer peripheral surface 62, between the side surfaces 63 and 64 and the inner peripheral surface 61, and between the side surfaces 63 and 64 and the outer peripheral surface 62. Therefore, it is preferable that no gap and nonmagnetic material are provided, and it is preferable that a portion having a high magnetic resistance is not provided.

  The chargeable / dischargeable power storage device 42 provided as a direct current power source can be constituted by a secondary battery, for example, and stores electrical energy. Inverter 40 provided as a first power conversion device that performs power conversion between power storage device 42 and stator winding 20 includes a switching element and a diode (rectifier element) connected in reverse parallel to the switching element. It can be realized by a known configuration, and can be supplied to each phase of the stator winding 20 by converting DC power from the power storage device 42 to AC (for example, three-phase AC) by switching operation of the switching element. . Furthermore, the inverter 40 can also convert power in a direction in which alternating current flowing in each phase of the stator winding 20 is converted into direct current and electric energy is collected in the power storage device 42. Thus, the inverter 40 can perform bidirectional power conversion between the power storage device 42 and the stator winding 20.

  The slip ring 95 is mechanically coupled to the input side rotor 28, and is electrically connected to each phase of the rotor winding 30. The brush 96 whose rotation is fixed is pressed against the slip ring 95 to be in electrical contact. The slip ring 95 rotates with the input-side rotor 28 while sliding with respect to the brush 96 (maintaining electrical contact with the brush 96). The brush 96 is electrically connected to the inverter 41. An inverter 41 provided as a second power conversion device that performs power conversion between any of the power storage device 42 and the inverter 40 and the rotor winding 30 includes a switching element and a diode (rectifier connected in reverse parallel to the switching element). Element), the DC power from the power storage device 42 is converted into alternating current (for example, three-phase alternating current) by the switching operation of the switching element, and the rotor is connected via the brush 96 and the slip ring 95. It is possible to supply each phase of the winding 30. Furthermore, the inverter 41 can also perform power conversion in a direction in which an alternating current flowing in each phase of the rotor winding 30 is converted into a direct current. At that time, AC power of the rotor winding 30 is extracted by the slip ring 95 and the brush 96, and the extracted AC power is converted to DC by the inverter 41. The electric power converted into direct current by the inverter 41 can be supplied to each phase of the stator winding 20 after being converted into alternating current by the inverter 40. That is, the inverter 40 can convert either (at least one) of the DC power from the inverter 41 and the DC power from the power storage device 42 into AC and supply it to each phase of the stator winding 20. In addition, the power converted into direct current by the inverter 41 can be recovered by the power storage device 42. Thus, the inverter 41 can perform bidirectional power conversion between any of the power storage device 42 and the inverter 40 and the rotor winding 30.

  The electronic control unit 50 controls the alternating current flowing in each phase of the stator winding 20 by controlling the switching operation of the switching element of the inverter 40 and controlling the power conversion in the inverter 40. The electronic control unit 50 controls the alternating current flowing in each phase of the rotor winding 30 by controlling the switching operation of the switching element of the inverter 41 and controlling the power conversion in the inverter 41. Furthermore, the electronic control unit 50 also controls the operating state of the engine 36 and the speed ratio of the transmission 44.

  When a three-phase alternating current flows through the three-phase stator winding 20 by the switching operation of the inverter 40, the stator winding 20 generates a rotating magnetic field that rotates in the stator circumferential direction. An electromagnetic interaction (attraction and repulsion) between the rotating magnetic field generated by the alternating current of the stator winding 20 and the field magnetic flux generated by the permanent magnet 33 flowing between the outer peripheral surface 62 and the side surfaces 63 and 64 of the soft magnetic material 53. Thus, torque can be applied between the stator 16 and the output side rotor 18, and the output side rotor 18 can be driven to rotate. That is, the electric power supplied from the power storage device 42 to the stator winding 20 via the inverter 40 can be converted into the power (mechanical power) of the output-side rotor 18, and the stator 16 and the output-side rotor 18 are connected to the synchronous motor ( PM motor part). Furthermore, it is possible to convert the power of the output side rotor 18 into the electric power of the stator winding 20 and collect it in the power storage device 42 via the inverter 40. The electronic control unit 50 controls the torque (PM motor torque) acting between the stator 16 and the output-side rotor 18 by controlling the amplitude and phase angle of the alternating current flowing through the stator winding 20 by the switching operation of the inverter 40, for example. Can be controlled.

  In addition, an induced electromotive force is generated in the rotor winding 30 as the input side rotor 28 rotates relative to the output side rotor 18 to cause a rotation difference between the input side rotor 28 and the output side rotor 18. A rotating magnetic field is generated when an induced current (alternating current) flows through the rotor winding 30 due to the induced electromotive force. The input side rotor 28 is caused by electromagnetic interaction between the rotating magnetic field generated by the induced current of the rotor winding 30 and the field magnetic flux generated by the permanent magnet 33 flowing between the inner peripheral surface 61 and the side surfaces 63 and 64 of the soft magnetic material 53. Torque can be applied between the output side rotor 18 and the output side rotor 18 can be driven to rotate. Therefore, power (mechanical power) can be transmitted between the input side rotor 28 and the output side rotor 18, and the input side rotor 28 and the output side rotor 18 can function as an induction electromagnetic coupling unit.

  When the torque (electromagnetic coupling torque) is generated between the input side rotor 28 and the output side rotor 18 by the induced current of the rotor winding 30, the electronic control unit 50 causes the induced current to flow through the rotor winding 30. The switching operation of the inverter 41 is performed so as to allow. At that time, the electronic control unit 50 controls the electromagnetic coupling torque acting between the input side rotor 28 and the output side rotor 18 by controlling the alternating current flowing through the rotor winding 30 by the switching operation of the inverter 41. can do. On the other hand, the electronic control unit 50 maintains the switching element of the inverter 41 in the OFF state and stops the switching operation, so that the induced current does not flow through the rotor winding 30 and the input side rotor 28 and the output side rotor 18 are not connected. Torque stops working.

  When the engine 36 is generating power, the power of the engine 36 is transmitted to the input side rotor 28, and the input side rotor 28 is rotationally driven in the engine rotation direction. When the rotational speed of the input side rotor 28 becomes higher than the rotational speed of the output side rotor 18, an induced electromotive force is generated in the rotor winding 30. The electronic control unit 50 performs the switching operation of the inverter 41 so as to allow the induced current to flow through the rotor winding 30. As a result, electromagnetic coupling torque in the engine rotation direction acts on the output side rotor 18 from the input side rotor 28 due to the electromagnetic interaction between the induced current of the rotor winding 30 and the field magnetic flux generated by the permanent magnet 33, and the output side rotor 18. Is driven to rotate in the engine rotation direction. Thus, the power from the engine 36 transmitted to the input side rotor 28 is transmitted to the output side rotor 18 by electromagnetic coupling between the rotor winding 30 of the input side rotor 28 and the permanent magnet 33 of the output side rotor 18. The The power transmitted to the output side rotor 18 is transmitted to the drive shaft 37 (wheels 38) after being shifted by the transmission 44, and used for forward driving of the load such as forward drive of the vehicle. Therefore, the wheel 38 can be rotationally driven in the forward direction using the power of the engine 36, and the vehicle can be driven in the forward direction. Further, since the rotation difference between the input side rotor 28 and the output side rotor 18 can be allowed, the engine 36 does not stall even if the rotation of the wheels 38 is stopped. Therefore, the rotating electrical machine 10 can function as a starting device, and there is no need to separately provide a starting device such as a friction clutch or a torque converter.

  Further, AC power generated in the rotor winding 30 is taken out via the slip ring 95 and the brush 96. The extracted AC power is converted into DC by the inverter 41. Then, by the switching operation of the inverter 40, the DC power from the inverter 41 is converted into AC by the inverter 40 and then supplied to the stator winding 20, whereby an AC current flows through the stator winding 20 and rotates to the stator 16. A magnetic field is formed. The torque in the engine rotation direction can be applied to the output side rotor 18 also by the electromagnetic interaction between the rotating magnetic field of the stator 16 and the field magnetic flux generated by the permanent magnet 33 of the output side rotor 18. As a result, a torque amplification function for amplifying the torque of the output side rotor 18 in the engine rotation direction can be realized. It is also possible to collect DC power from the inverter 41 in the power storage device 42.

  Further, by controlling the switching operation of the inverter 40 so that electric power is supplied from the power storage device 42 to the stator winding 20, the wheel 38 is rotated in the normal rotation direction using the power of the engine 36, and the stator winding 20. The rotational drive of the wheel 38 in the forward rotation direction can be assisted by the power of the output-side rotor 18 generated using the power supplied to the wheel. Further, at the time of load deceleration operation, the electronic control unit 50 controls the switching operation of the inverter 40 so that power is recovered from the stator winding 20 to the power storage device 42, so that the load power is transmitted to the stator winding 20 and the permanent magnet. The electric power of the stator winding 20 can be converted by the electromagnetic coupling with 33 and recovered in the power storage device 42.

  In addition, when EV (Electric Vehicle) traveling is performed by driving the load using the power of the rotating electrical machine 10 without using the power of the engine 36 (rotating the wheel 38), the electronic control unit 50 By controlling the switching operation, drive control of the load is performed. For example, the electronic control unit 50 controls the switching operation of the inverter 40 so that the DC power from the power storage device 42 is converted into AC and supplied to the stator winding 20, thereby supplying power to the stator winding 20. Is converted into power of the output-side rotor 18 by electromagnetic coupling between the stator winding 20 and the permanent magnet 33, and the drive shaft 37 (wheel 38) is rotationally driven. Thus, even if the engine 36 is not generating power, the wheels 38 can be rotationally driven by supplying power to the stator winding 20.

  Here, in the stator 16 and the output-side rotor 18, the direction of the magnet magnetic flux passing through the central position in the rotor circumferential direction of the outer peripheral surface 62 of the soft magnetic material 53 is defined as a d-axis (flux axis), and the electrical angle is shifted by 90 ° from the d-axis. The position (rotor circumferential end position of the outer circumferential surface 62) is defined as the q axis (torque axis). And on the outer peripheral surface 62 of the soft magnetic material 53, the stator winding 20 for maximizing the d-axis magnetic flux passing through the rotor circumferential center position (minimizing the q-axis magnetic flux passing through the rotor circumferential end position). The current of the stator winding 20 for maximizing the q-axis magnetic flux passing through the rotor circumferential end position (minimizing the d-axis magnetic flux passing through the rotor circumferential center position) is the q-axis current. And Similarly, in the input-side rotor 28 and the output-side rotor 18, the direction of the magnetic flux passing through the center position in the rotor circumferential direction of the inner peripheral surface 61 of the soft magnetic material 53 is d-axis, and the electrical angle is shifted by 90 ° from the d-axis. The position (rotor circumferential direction end position of the inner peripheral surface 61) is defined as the q axis. Then, on the inner peripheral surface 61 of the soft magnetic material 53, the rotor winding 30 for maximizing the d-axis magnetic flux passing through the rotor circumferential center position (minimizing the q-axis magnetic flux passing through the rotor circumferential end position). Current in the rotor winding 30 for maximizing the q-axis magnetic flux passing through the rotor circumferential end position (minimizing the d-axis magnetic flux passing through the rotor circumferential center position) Let it be current.

  FIG. 5 shows the flow of the d-axis magnetic flux when the d-axis current flows through the rotor winding 30. As indicated by the arrows in FIG. 5, the d-axis magnetic flux due to the d-axis current of the rotor winding 30 acts on the inner peripheral surface 61-1 of the soft magnetic material 53-1, from the input side rotor 28 (tooth 52a), and soft. The magnetic material 53-1 flows from the inner peripheral surface 61-1 to the outer peripheral surface 62-1, and acts on the stator 16 (the teeth 51a). Further, the d-axis magnetic flux flowing through the stator 16 acts on the outer peripheral surface 62-2 of the soft magnetic material 53-2 from the teeth 51a, and the soft magnetic material 53-2 is transferred from the outer peripheral surface 62-2 to the inner peripheral surface 61-2. The flow returns to the input side rotor 28 (tooth 52a). As indicated by the arrows in FIGS. 4 and 5, the d-axis magnetic flux due to the d-axis current of the rotor winding 30 behaves in the opposite direction to the field magnetic flux generated by the permanent magnet 33 for the input side rotor 28 and is permanent for the stator 16. It behaves in the same direction as the field magnetic flux generated by the magnet 33. Therefore, the field magnet acting on the stator 16 by the permanent magnet 33 is generated by generating the d-axis flux by the d-axis current of the rotor winding 30 so as to weaken the field flux acting on the input side rotor 28 by the permanent magnet 33. Magnetic flux can be strengthened. In addition, the field magnet acting on the stator 16 by the permanent magnet 33 is generated by generating the d-axis flux by the d-axis current of the rotor winding 30 so that the field flux acting on the input side rotor 28 by the permanent magnet 33 is strengthened. Magnetic flux can be weakened. As described above, the d-axis magnetic flux due to the d-axis current of the rotor winding 30 flows between the inner peripheral surface 61 and the outer peripheral surface 62 of the soft magnetic material 53 and acts on the stator 16, thereby affecting the magnetic flux flowing through the stator 16. give.

  On the other hand, the flow of the q-axis magnetic flux when the q-axis current flows through the rotor winding 30 is shown in FIG. As shown in FIG. 6, the q-axis magnetic flux due to the q-axis current of the rotor winding 30 acts on the inner peripheral surface 61-1 of the soft magnetic material 53-1, from the input side rotor 28 (tooth 52a), and the soft magnetic material. 53-1 flows but does not act on the stator 16 (the teeth 51a) from the outer peripheral surface 62-2 of the soft magnetic material 53-1, but from the inner peripheral surface 61-1 of the soft magnetic material 53-1, to the input side rotor 28. Return to (tooth 52a). The flow of the q-axis magnetic flux in the soft magnetic material 53-2 is the same as that of the soft magnetic material 53-1. Therefore, the q-axis magnetic flux due to the q-axis current of the rotor winding 30 does not affect the magnetic flux flowing through the stator 16.

  FIG. 7 shows the flow of the d-axis magnetic flux when the d-axis current flows through the stator winding 20. As shown by the arrows in FIG. 7, the d-axis magnetic flux due to the d-axis current of the stator winding 20 acts on the outer peripheral surface 62-1 of the soft magnetic material 53-1, from the stator 16 (tooth 51a), and the soft magnetic material 53. -1 flows from the outer peripheral surface 62-1 to the inner peripheral surface 61-1, and acts on the input side rotor 28 (the teeth 52a). Further, the d-axis magnetic flux flowing through the input side rotor 28 acts on the inner peripheral surface 61-2 of the soft magnetic material 53-2 from the teeth 52a, and the soft magnetic material 53-2 is changed from the inner peripheral surface 61-2 to the outer peripheral surface 62. -2 to return to the stator 16 (the teeth 51a). As shown by arrows in FIGS. 4 and 7, the d-axis magnetic flux due to the d-axis current of the stator winding 20 behaves in the opposite direction to the field magnetic flux generated by the permanent magnet 33 for the stator 16 and is permanent for the input-side rotor 28. It behaves in the same direction as the field magnetic flux generated by the magnet 33. Therefore, by generating a d-axis magnetic flux by the d-axis current of the stator winding 20 so as to weaken the field magnetic flux acting on the stator 16 by the permanent magnet 33, the field magnet acting on the input-side rotor 28 by the permanent magnet 33. Magnetic flux can be strengthened. Further, the field magnet acting on the input side rotor 28 by the permanent magnet 33 is generated by generating the d-axis flux by the d-axis current of the stator winding 20 so as to strengthen the field flux acting on the stator 16 by the permanent magnet 33. Magnetic flux can be weakened. In this way, the d-axis magnetic flux due to the d-axis current of the stator winding 20 flows between the outer peripheral surface 62 and the inner peripheral surface 61 of the soft magnetic material 53 and acts on the input side rotor 28, thereby causing the input side rotor 28 to move. Affects the flowing magnetic flux.

  On the other hand, the flow of the q-axis magnetic flux when the q-axis current flows through the stator winding 20 is shown in FIG. As shown in FIG. 8, the q-axis magnetic flux due to the q-axis current of the stator winding 20 acts on the outer peripheral surface 62-1 of the soft magnetic material 53-1, from the stator 16 (tooth 51a), and the soft magnetic material 53-1. However, it does not act on the input-side rotor 28 (the teeth 52a) from the inner peripheral surface 61-1 of the soft magnetic material 53-1, and the stator 16 (the teeth 51a) from the outer peripheral surface 62-1 of the soft magnetic material 53-1. Return to). The flow of the q-axis magnetic flux in the soft magnetic material 53-2 is the same as that of the soft magnetic material 53-1. Therefore, the q-axis magnetic flux due to the q-axis current of the stator winding 20 does not affect the magnetic flux flowing through the input side rotor 28.

  Therefore, an alternating current is passed through the rotor winding 30 to cause a torque to act between the input side rotor 28 and the output side rotor 18, and an alternating current is passed through the stator winding 20 to cause a torque between the stator 16 and the output side rotor 18. In the case of acting, the d-axis magnetic flux component due to the d-axis current component of the rotor winding 30 weakens the field magnetic flux due to the permanent magnet 33 acting on the input side rotor 28, and at the same time, the field magnet due to the permanent magnet 33 acting on the stator 16. Magnetic flux can be strengthened. That is, the d-axis magnetic flux component due to the d-axis current component of the rotor winding 30 can be used as the field-weakening magnetic flux of the rotor winding 30 and the field-enhancing magnetic flux of the stator winding 20. This strong field magnetic flux interacts with the q-axis current component of the stator winding 20, so that additional torque is generated between the stator 16 and the output-side rotor 18 in addition to the magnet torque and reluctance torque. can get. Torque between the stator 16 and the output-side rotor 18 when an alternating current is passed through both the rotor winding 30 and the stator winding 20, an alternating current is applied only to the stator winding 20 without passing an alternating current through the rotor winding 30. FIG. 9 shows a comparison with the torque when flowing through. As shown in FIG. 9, it can be seen that a torque amplification effect can be obtained by passing an alternating current through not only the stator winding 20 but also the rotor winding 30. In this case, unlike the conventional strong field control, the field weakening of the rotor winding 30 itself is used, so that the counter electromotive voltage of the rotor winding 30 is suppressed and the stator 16 and the output-side rotor 18 are controlled. Torque can be amplified.

  Similarly, an alternating current is passed through the rotor winding 30 to cause a torque to act between the input side rotor 28 and the output side rotor 18, and an alternating current is passed through the stator winding 20 to cause a torque between the stator 16 and the output side rotor 18. , The d-axis magnetic flux component due to the d-axis current component of the stator winding 20 weakens the field magnetic flux due to the permanent magnet 33 acting on the stator 16, and the field due to the permanent magnet 33 acting on the input-side rotor 28. Magnetic flux can be strengthened. In other words, the d-axis magnetic flux component due to the d-axis current component of the stator winding 20 can be used as the field weakening magnetic flux of the stator winding 20 and the strong field magnetic flux of the rotor winding 30. This strong field magnetic flux interacts with the q-axis current component of the rotor winding 30, whereby additional torque is generated between the input side rotor 28 and the output side rotor 18, and a torque amplification effect is obtained. The torque between the input side rotor 28 and the output side rotor 18 when an alternating current is passed through both the rotor winding 30 and the stator winding 20 is applied only to the rotor winding 30 without passing an alternating current through the stator winding 20. FIG. 10 shows a comparison with the torque when an alternating current is passed. As shown in FIG. 10, it can be seen that a torque amplification effect can be obtained by passing an alternating current through not only the rotor winding 30 but also the stator winding 20. In this case, unlike the conventional strong field control, the field weakening of the stator winding 20 itself is used, and therefore, the input side rotor 28 and the output side rotor 18 are suppressed while suppressing the back electromotive voltage of the stator winding 20. The torque in between can be amplified. Therefore, the torque between the input side rotor 28 and the output side rotor 18 and the torque between the stator 16 and the output side rotor 18 reinforce each other while suppressing the back electromotive voltage of the rotor winding 30 and the stator winding 20. An effect is obtained. As a result, the amount of permanent magnets 33 can be reduced.

  Further, an alternating current is passed through the rotor winding 30 to cause a torque to act between the input side rotor 28 and the output side rotor 18, and an alternating current is passed through the stator winding 20 to cause a torque between the stator 16 and the output side rotor 18. In the case of acting, the d-axis magnetic flux component due to the d-axis current component of the rotor winding 30 strengthens the field magnetic flux by the permanent magnet 33 acting on the input side rotor 28 and at the same time the field magnet by the permanent magnet 33 acting on the stator 16. Magnetic flux can be weakened. Thus, the torque between the input side rotor 28 and the output side rotor 18 can be amplified while suppressing the counter electromotive voltage of the stator winding 20. Similarly, the d-axis magnetic flux component due to the d-axis current component of the stator winding 20 strengthens the field magnetic flux due to the permanent magnet 33 acting on the stator 16 and the field magnetic flux due to the permanent magnet 33 acting on the input-side rotor 28. It can also be weakened. Thereby, the torque between the stator 16 and the output side rotor 18 can be amplified while suppressing the back electromotive voltage of the rotor winding 30.

  In addition, when the quantity of the permanent magnet 33 is reduced, the field magnetic flux by the permanent magnet 33 is also reduced. In that case, the field weakening magnetic flux (d-axis magnetic flux) at the time of high current of the rotor winding 30 becomes stronger than the field magnetic flux generated by the permanent magnet 33, and the rotor winding 30 is reversed by its own field weakening magnetic flux. An electromotive voltage is generated. Similarly, the field-weakening magnetic flux (d-axis magnetic flux) at the time of high current of the stator winding 20 becomes stronger than the field magnetic flux due to the permanent magnet 33, and the stator winding 20 has a back electromotive force due to its own field-weakening magnetic flux. Voltage is generated. Further, in this configuration, the field weakening magnetic flux of the rotor winding 30 functions as a strong field magnetic flux for the stator winding 20, and the field weakening magnetic flux of the stator winding 20 is a strong field magnetic flux for the rotor winding 30. Function as. Therefore, the d-axis magnetic flux component due to the d-axis current component of the rotor winding 30 weakens the field magnetic flux due to the permanent magnet 33 acting on the input side rotor 28, and the d-axis magnetic flux component due to the d-axis current component of the stator winding 20 is reduced. When the field magnetic flux generated by the permanent magnet 33 acting on the stator 16 is weakened, that is, when the rotor winding 30 and the stator winding 20 generate the weakening magnetic field flux at the same time, as shown in FIG. The magnetic flux (d-axis magnetic flux) and the field weakening magnetic flux (d-axis magnetic flux) of the stator winding 20 act so as to cancel each other. Therefore, the counter electromotive voltage generated in the rotor winding 30 and the stator winding 20 can be reduced. For example, the field weakening magnetic flux (d-axis magnetic flux) of the rotor winding 30 is the sum of the field magnetic flux of the permanent magnet 33 linked to the rotor winding 30 and the field weakening magnetic flux (d-axis magnetic flux) of the stator winding 20. By controlling the alternating current (d-axis current) of the rotor winding 30 and the alternating current (d-axis current) of the stator winding 20 so as to be equal (or substantially equal), the reverse generated in the rotor winding 30 The electromotive voltage can be minimized. In addition, the field weakening magnetic flux (d-axis magnetic flux) of the stator winding 20 is the sum of the field magnetic flux of the permanent magnet 33 interlinked with the stator winding 20 and the field weakening magnetic flux (d-axis magnetic flux) of the rotor winding 30. By controlling the alternating current (d-axis current) of the rotor winding 30 and the alternating current (d-axis current) of the stator winding 20 so as to be equal (or substantially equal), the reverse generated in the stator winding 20 The electromotive voltage can be minimized.

An example of a functional block diagram of the electronic control unit 50 for controlling the alternating current flowing through the stator winding 20 and the alternating current flowing through the rotor winding 30 is shown in FIG. The coupling torque command value calculation unit 135 is an electromagnetic that acts between the input-side rotor 28 and the output-side rotor 18 based on, for example, the accelerator opening (the required driving force of the wheel 38) and the vehicle speed (the rotational speed of the wheel 38). A command value T _{coup_ref} for the coupling torque is calculated. The MG torque command value calculation unit 155 is based on, for example, the accelerator opening A (the required driving force of the wheel 38) and the electromagnetic coupling torque command value T _{coup_ref} calculated by the coupling torque command value calculation unit 135. A command value T _{mg_ref} of MG torque acting between the stator 16 and the output side rotor 18 is calculated. The field magnetic flux correction value calculation unit 154 calculates a field magnetic flux correction value ΔΦ _{coup_ref} by the permanent magnet 33 based on, for example, the rotational speed ω _in of the input side rotor 28 and the rotational speed ω _out of the output side rotor 18. .

The d-axis current command value calculation unit 136 has a rotational speed difference ω _in −ω _out between the input side rotor 28 and the output side rotor 18, and a command value T of the electromagnetic coupling torque calculated by the coupling torque command value calculation unit 135. Based on _{coup_ref} , a command value Id _{coup_temp} of the d-axis current of the rotor winding 30 is calculated. The q-axis current command value calculation unit 137 calculates the q-axis current command value Iq _{coup_temp} of the rotor winding 30 based on the electromagnetic coupling torque command value T _{coup_ref} calculated by the coupling torque command value calculation unit 135. To do. The d-axis current command value correction unit 138 corrects the command value Id _{coup_temp} of the d-axis current of the rotor winding 30 based on the field flux correction value ΔΦ _{coup_ref} calculated by the field magnetic flux correction value calculation unit 154. The corrected d-axis current command value Id _{coup_ref} is output. The q-axis current command value correction unit 139 corrects the command value Iq _{coup_temp} of the q-axis current of the rotor winding 30 based on the command value Id _{coup_ref} of the d-axis current corrected by the d-axis current command value correction unit 138. The corrected q-axis current command value Iq _{coup_ref} is output.

The d-axis current command value calculation unit 156 is based on the rotational speed ω _out of the output-side rotor 18 and the MG torque command value T _{mg_ref} calculated by the MG torque command value calculation unit 155. The axis current command value Id _{mg_temp} is calculated. The q-axis current command value calculation unit 157 calculates a command value Iq _{mg_temp} of the q-axis current of the stator winding 20 based on the MG torque command value T _{mg_ref} calculated by the MG torque command value calculation unit 155. The d-axis current command value correction unit 158 corrects the command value Id _{mg_temp} of the d-axis current of the stator winding 20 based on the field flux correction value ΔΦ _{coup_ref} calculated by the field magnetic flux correction value calculation unit 154. Then, the corrected d-axis current command value Id _{mg_ref} is output. The q-axis current command value correction unit 159 corrects the q-axis current command value Iq _{mg_temp} of the stator winding 20 based on the d-axis current command value Id _{mg_ref} corrected by the d-axis current command value correction unit 158. The corrected q-axis current command value Iq _{mg_ref} is output.

The rotor winding current control unit 140 includes a d-axis current command value Id _{coup_ref} and a q-axis current _obtained by correcting the d-axis current Id _coup and the q-axis current Iq _coup of the rotor winding 30 by the d-axis current command value correction unit 138. The switching operation of the inverter 41 (power conversion in the inverter 41) is controlled so as to coincide with the q-axis current command value _{Iqcoup_ref} corrected by the command value correction unit 139. As a result, the electromagnetic coupling torque T _coup acting between the input side rotor 28 and the output side rotor 18 is controlled to coincide with the command value T _{coup_ref} calculated by the electromagnetic coupling torque command value calculation unit 135. The stator winding current control unit 160 includes a d-axis current command value Id _{mg_ref} and a q-axis current _obtained by correcting the d-axis current Id _mg and the q-axis current Iq _mg of the stator winding 20 by the d-axis current command value correction unit 158. The switching operation of the inverter 40 (power conversion in the inverter 40) is controlled so as to coincide with the q-axis current command value Iq _{mg_ref} corrected by the command value correction unit 159. Thus, the MG torque T _mg acting between the stator 16 and the output side rotor 18 is controlled so as to coincide with the command value T _{mg_ref} calculated by the MG torque command value calculation unit 155. Further, the d-axis current Id _coup of the rotor winding 30 and the stator winding are set so that the correction amount ΔΦ _coup of the field magnetic flux by the permanent magnet 33 coincides with the correction value ΔΦ _{coup_ref} calculated by the field magnetic flux correction value calculation unit 154. At least one of the d-axis current Id _mg of the line 20 is controlled.

According to the present embodiment described above, when an alternating current flows through the rotor winding 30 and the stator winding 20, the magnetic flux (d-axis magnetic flux) generated by the alternating current (d-axis current _Idcoup ) of the rotor winding 30 is input. AC current (d-axis current Id _coup ) is applied to the rotor winding 30 so that one of the field magnetic flux of the permanent magnet 33 acting on the side rotor 28 and the field magnetic flux of the permanent magnet 33 acting on the stator 16 is weakened and the other is strengthened. And the magnetic flux (d-axis magnetic flux) generated by the alternating current (d-axis current Id _mg ) of the stator winding 20 and the field magnetic flux of the permanent magnet 33 acting on the input-side rotor 28 and the permanent magnet 33 acting on the stator 16. executing at least one control for supplying alternating current (d-axis current Id _mg) in the stator winding 20 so as to enhance one of the weakening and the other field flux of. Thereby, the electromagnetic coupling torque T _coup between the input-side rotor 28 and the output-side rotor 18 and between the stator 16 and the output-side rotor 18 are suppressed while suppressing the back electromotive voltage generated in the rotor winding 30 and the stator winding 20. The MG torque T _mg can be amplified, and the amount of the permanent magnet 33 can be reduced. By suppressing the counter electromotive voltage generated in the rotor winding 30, the range of the rotational speed difference ω _in −ω _out between the operable input side rotor 28 and the output side rotor 18 can be expanded to a higher rotation side, By suppressing the counter electromotive voltage generated in the stator winding 20, the range of the rotational speed ω _out of the operable output side rotor 18 can be expanded to a higher rotation side.

For example, the d-axis magnetic flux _generated by the d-axis current Id _coup of the rotor winding 30 weakens the field magnetic flux of the permanent magnet 33 acting on the input-side rotor 28 and strengthens the field magnetic flux of the permanent magnet 33 acting on the stator 16. By controlling the d-axis current Id _coup of the rotor winding 30, it is possible to amplify the MG torque T _mg between the stator 16 and the output side rotor 18 while suppressing the counter electromotive voltage generated in the rotor winding 30. it can. Further, the d-axis magnetic flux due to the d-axis current Id _mg of the stator winding 20 weakens the field magnetic flux of the permanent magnet 33 acting on the stator 16 and strengthens the field magnetic flux of the permanent magnet 33 acting on the input side rotor 28. By controlling the d-axis current Id _mg of the stator winding 20, the electromagnetic coupling torque T _coup between the input side rotor 28 and the output side rotor 18 can be reduced while suppressing the back electromotive voltage generated in the stator winding 20. Can be amplified. The d-axis magnetic flux _generated by the d-axis current Id _coup of the rotor winding 30 strengthens the field magnetic flux of the permanent magnet 33 acting on the input side rotor 28 and weakens the field magnetic flux of the permanent magnet 33 acting on the stator 16. By controlling the d-axis current Id _coup of the rotor winding 30, it is possible to amplify the electromagnetic coupling torque T _coup while suppressing the counter electromotive voltage generated in the stator winding 20. Further, the d-axis magnetic flux due to the d-axis current Id _mg of the stator winding 20 strengthens the field magnetic flux of the permanent magnet 33 acting on the stator 16 and weakens the field magnetic flux of the permanent magnet 33 acting on the input-side rotor 28. By controlling the d-axis current Id _mg of the stator winding 20, it is possible to amplify the MG torque T _mg while suppressing the counter electromotive voltage generated in the rotor winding 30.

In the present embodiment, the d-axis magnetic flux caused by the d-axis current Id _coup of the rotor winding 30 and the d-axis magnetic flux caused by the d-axis current Id _mg of the stator winding 20 repel each other (in the opposite direction). By controlling the d-axis current Id _coup of the rotor winding 30 and the d-axis current Id _mg of the stator winding 20, the back electromotive voltage generated in the rotor winding 30 and the stator winding 20 can be reduced. For example, the d-axis current Id _coup of the rotor winding 30 is controlled so that the d-axis flux caused by the d-axis current Id _coup of the rotor winding 30 weakens the field flux of the permanent magnet 33 acting on the input side rotor 28. By controlling the d-axis current Id _mg of the stator winding 20 so that the d-axis magnetic flux caused by the d-axis current Id _mg of the stator winding 20 weakens the field magnetic flux of the permanent magnet 33 acting on the stator 16, the rotor winding The 30 d-axis magnetic flux (weak field magnetic flux) and the d-axis magnetic flux (weak field magnetic flux) of the stator winding 20 can be made to repel each other (in the opposite direction). The d-axis current Id _coup of the rotor winding 30 is controlled so that the d-axis flux caused by the d-axis current Id _coup of the rotor winding 30 strengthens the field flux of the permanent magnet 33 acting on the input side rotor 28. also by the d-axis magnetic flux due to the d-axis current Id _mg of the stator windings 20 controls the d-axis current Id _mg of the stator winding 20 to enhance the field flux of the permanent magnet 33 acting on the stator 16, the rotor winding It is possible to cause the d-axis magnetic flux of the wire 30 and the d-axis magnetic flux of the stator winding 20 to repel each other.

Further, in the present embodiment, the permanent magnet 33 and the portion having a high magnetic resistance such as a gap and a nonmagnetic material are not provided between the inner peripheral surface 61 and the outer peripheral surface 62 of the soft magnetic material 53. The d-axis magnetic flux of the wire 30 can be efficiently applied to the stator 16 via the soft magnetic material 53. Therefore, the field magnetic flux flowing through the stator 16 can be efficiently controlled by controlling the d-axis current Id _coup of the rotor winding 30. Similarly, since the d-axis magnetic flux of the stator winding 20 can be efficiently applied to the input-side rotor 28 via the soft magnetic material 53, the input-side rotor is controlled by controlling the d-axis current Id _mg of the stator winding 20. It is possible to efficiently control the field magnetic flux that flows through 28. In this case, it is not necessary to separately add a field winding for controlling the field magnetic flux to the output-side rotor 18, so that the configuration of the rotating electrical machine 10 is not complicated.

  In the above embodiment, the permanent magnet 33 disposed between the soft magnetic materials 53 adjacent in the rotor circumferential direction has a tilt angle of 90 ° with respect to the radial direction of the magnetic pole surface, for example, as shown in FIG. It is also possible to arrange. FIG. 13 also shows the flow of field magnetic flux by the permanent magnet 33, as in FIG. It is also possible to arrange the magnetic pole surface of the permanent magnet 33 along the radial direction.

  In the above embodiment, the example of the radial type rotary electric machine 10 in which the output side rotor 18 faces the input side rotor 28 and the stator 16 in the radial direction has been described. However, the rotating electrical machine 10 may be an axial rotating electrical machine in which the output-side rotor 18 faces the input-side rotor 28 and the stator 16 and the rotor rotation shaft, as shown in FIGS. 14 shows a configuration example of the axial type rotating electrical machine 10, FIG. 15 shows a configuration example of the stator 16, FIG. 16 shows a configuration example of the input side rotor 28, and FIG. 17 shows a configuration example of the output side rotor 18. Show. Each of the plurality of soft magnetic materials 53 divided and arranged at equal intervals in the circumferential direction of the rotor includes a lower surface (first surface) 61 facing the input-side rotor 28 (tooth 52a) with a predetermined gap, and a stator 16 ( An upper surface (second surface) 62 facing the teeth 51a) with a predetermined gap, a side surface (third surface) 63 facing (contacting) the magnetic pole surface of one adjacent permanent magnet 33, and the other adjacent And a side surface (fourth surface) 64 facing (contacting) the magnetic pole surface of the permanent magnet 33. In the example shown in FIG. 17, the magnetic pole surface of each permanent magnet 33 is arranged along the radial direction.

  In the above embodiment, the case where the output side rotor 18 is provided with the permanent magnet 33 has been described. However, in the output side rotor 18, for example, as shown in FIG. 18, it is possible to provide a nonmagnetic material 35 instead of the permanent magnet 33. In the configuration example shown in FIG. 18, the plurality of soft magnetic materials 53 are divided and arranged at intervals (equal intervals) in the circumferential direction of the rotor. A plurality (the same number as the soft magnetic material 53) of non-magnetic members 35 are arranged at equal intervals (equal intervals) in the rotor circumferential direction, and each of them is arranged between the soft magnetic materials 53 adjacent in the rotor circumferential direction. ing. Each of the soft magnetic materials 53 disposed between the non-magnetic members 35 adjacent to each other in the rotor circumferential direction has an inner peripheral surface (first surface) 61 facing the input-side rotor 28 (tooth 52a) with a predetermined gap therebetween. An outer peripheral surface (second surface) 62 facing the stator 16 (tooth 51a) with a predetermined gap, and a side surface (third surface) 63 facing (contacting) one of the adjacent non-magnetic bodies 35, And a side surface (fourth surface) 64 facing (contacting) the other non-magnetic body 35 adjacent thereto, and allows magnetic flux to pass between the inner peripheral surface 61 and the outer peripheral surface 62. It is also possible to provide a gap in place of the nonmagnetic material 35. Moreover, the soft magnetic materials 53 adjacent in the rotor circumferential direction may be connected by a bridge.

As described above, the q-axis magnetic flux due to the q-axis current Iq _coup of the rotor winding 30 does not affect the magnetic flux flowing through the stator 16, but the d-axis magnetic flux due to the d-axis current Id _coup of the rotor winding 30 is 18, the magnetic flux flowing through the stator 16 is affected by flowing between the inner peripheral surface 61 and the outer peripheral surface 62 of the soft magnetic material 53 and acting on the stator 16. Therefore, the d-axis magnetic flux due to the d-axis current Id _coup of the rotor winding 30 behaves in the same manner as the field magnetic flux when the permanent magnet 33 is provided at the position of the nonmagnetic material 35 for the stator 16. Therefore, when a torque is applied between the stator 16 and the output side rotor 18, an alternating current is passed through the stator winding 20 and a magnetic flux (d-axis magnetic flux) due to the alternating current (d-axis current Id _coup ) of the rotor winding 30. Controls the alternating current (d-axis current Id _coup ) flowing through the rotor winding 30 so as to flow between the inner peripheral surface 61 and the outer peripheral surface 62 of the soft magnetic material 53 and to act on the stator 16. When the d-axis magnetic flux of the rotor winding 30 interacts with the q-axis current component Iq _{mg of the} stator winding 20, additional torque is generated between the stator 16 and the output side rotor 18 in addition to the reluctance torque. An amplification effect is obtained.

Similarly, the q-axis magnetic flux due to the q-axis current Iq _mg of the stator winding 20 does not affect the magnetic flux flowing through the input side rotor 28, but the d-axis magnetic flux due to the d-axis current Id _mg of the stator winding 20 is soft. By flowing between the outer peripheral surface 62 and the inner peripheral surface 61 of the magnetic material 53 and acting on the input side rotor 28, the magnetic flux flowing through the input side rotor 28 is affected. Therefore, the d-axis magnetic flux due to the d-axis current Id _mg of the stator winding 20 behaves in the same manner as the field magnetic flux when the permanent magnet 33 is provided at the position of the nonmagnetic material 35 for the input side rotor 28. Therefore, when a torque is applied between the input side rotor 28 and the output side rotor 18, an alternating current is passed through the rotor winding 30 and a magnetic flux (d-axis) generated by the alternating current (d-axis current Id _mg ) of the stator winding 20. The alternating current (d-axis current Id _mg ) flowing in the stator winding 20 is controlled so that the magnetic flux) flows between the outer peripheral surface 62 and the inner peripheral surface 61 of the soft magnetic material 53 and acts on the input side rotor 28. Since the d-axis magnetic flux of the stator winding 20 interacts with the q-axis current component Iq _{coup of the} rotor winding 30, additional torque is generated between the input side rotor 28 and the output side rotor 18 in addition to the reluctance torque. A torque amplification effect can be obtained.

Further, the rotor winding 30 is configured so that the d-axis magnetic flux caused by the d-axis current Id _coup of the rotor winding 30 and the d-axis magnetic flux caused by the d-axis current Id _mg of the stator winding 20 repel each other (in opposite directions). By controlling the d-axis current Id _coup and the d-axis current Id _mg of the stator winding 20, the back electromotive voltage generated in the rotor winding 30 and the stator winding 20 can be reduced.

Also, in the configuration example shown in FIG. 18, the permanent magnet and the portion having a high magnetic resistance such as a gap and a nonmagnetic material are not provided between the inner peripheral surface 61 and the outer peripheral surface 62 of the soft magnetic material 53. The d-axis magnetic flux of the rotor winding 30 can be efficiently applied to the stator 16 via the soft magnetic material 53. Therefore, the field magnetic flux flowing through the stator 16 can be efficiently controlled by controlling the d-axis current Id _coup of the rotor winding 30. Similarly, since the d-axis magnetic flux of the stator winding 20 can be efficiently applied to the input-side rotor 28 via the soft magnetic material 53, the input-side rotor is controlled by controlling the d-axis current Id _mg of the stator winding 20. It is possible to efficiently control the field magnetic flux that flows through 28. In this case, it is not necessary to separately add a field winding for controlling the field magnetic flux to the output-side rotor 18, so that the configuration of the rotating electrical machine 10 is not complicated.

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

  DESCRIPTION OF SYMBOLS 10 Rotating electrical machinery, 16 Stator (stator), 18 Output side rotor (2nd rotor, 2nd rotor), 20 Stator winding (stator winding), 28 Input side rotor (1st rotor, 1st rotor) ), 30 rotor winding (rotor winding), 33 permanent magnet, 35 non-magnetic material, 36 engine, 37 drive shaft, 38 wheels, 40, 41 inverter, 42 power storage device, 44 transmission, 50 electronic control unit, 51 Stator core, 52 Rotor core, 53 Soft magnetic material, 54 Air gap, 61 Inner peripheral surface (first surface), 62 Outer peripheral surface (second surface), 63, 64 Side surface (third surface, fourth surface), 95 Slip ring 96 brushes.

Claims (7)

A first rotor provided with a rotor winding;
A stator provided with a stator winding;
A second rotor facing the first rotor and the stator and rotatable relative to the first rotor;
With
The second rotor is
A plurality of magnets spaced apart from each other in the circumferential direction;
A plurality of soft magnetic materials each disposed between circumferentially adjacent magnets;
Including
Each soft magnetic material
A first surface facing the first rotor, a second surface facing the stator, a third surface facing the magnetic pole surface of one magnet adjacent in the circumferential direction, and the other surface adjacent to the other magnet in the circumferential direction. A fourth surface facing the magnetic pole surface, and passing magnetic flux between the first surface and the second surface,
Furthermore, when the magnetic pole surface of the magnet facing the third surface and the magnetic pole surface of the magnet facing the fourth surface have the same polarity, and both of these magnetic pole surfaces are N-poles, the magnetic flux generated by the magnet is the third and the third. When these magnetic pole faces are both S poles, the magnetic flux from the magnet flows from the first and second faces to the third and fourth faces.
Torque acts between the first rotor and the second rotor due to the interaction between the alternating current flowing through the rotor winding and the magnetic flux generated by the magnet flowing between the first surface and the third and fourth surfaces of the soft magnetic material. And
Torque acts between the stator and the second rotor due to the interaction between the alternating current flowing through the stator winding and the magnetic flux generated by the magnet flowing between the second surface and the third and fourth surfaces of the soft magnetic material,
Further, when an alternating current flows through the rotor winding and the stator winding, one of the magnetic flux generated by the magnet acting on the first rotor and the magnetic flux generated by the magnet acting on the stator is caused by the magnetic flux generated by the alternating current of the rotor winding. Control of flowing an alternating current through the rotor winding so as to weaken and strengthen the other, and the magnetic flux generated by the magnet acting on the first rotor and the magnetic flux generated by the magnet acting on the stator by the magnetic flux generated by the alternating current of the stator winding. A rotating electrical machine system that executes at least one of control of flowing an alternating current through a stator winding so as to weaken one and strengthen the other. The rotating electrical machine system according to claim 1,
When an alternating current flows through the rotor winding and the stator winding, the magnetic flux due to the alternating current in the rotor winding weakens the magnetic flux due to the magnet acting on the first rotor and strengthens the magnetic flux due to the magnet acting on the stator. A rotating electrical machine system that controls the alternating current that flows through the rotor windings. The rotating electrical machine system according to claim 1 or 2,
When an alternating current flows through the rotor winding and the stator winding, the magnetic flux due to the alternating current of the stator winding weakens the magnetic flux due to the magnet acting on the stator and strengthens the magnetic flux due to the magnet acting on the first rotor. A rotating electrical machine system that controls the alternating current flowing through the stator windings. The rotating electrical machine system according to any one of claims 1 to 3,
When an alternating current flows through the rotor winding and the stator winding, the alternating current that flows through the rotor winding so that the magnetic flux generated by the alternating current in the rotor winding and the magnetic flux generated by the alternating current in the stator winding repel each other. A rotating electrical machine system that controls an electric current and an alternating current flowing through a stator winding. The rotating electrical machine system according to any one of claims 1 to 4,
A rotating electrical machine system in which a gap or a nonmagnetic material is provided between soft magnetic materials adjacent in the circumferential direction. The rotating electrical machine system according to any one of claims 1 to 5,
A rotating electrical machine system in which a gap and a nonmagnetic material are not provided inside each soft magnetic material. A first rotor provided with a rotor winding;
A stator provided with a stator winding;
A second rotor facing the first rotor and the stator and rotatable relative to the first rotor;
With
The second rotor includes a plurality of soft magnetic materials spaced apart from each other in the circumferential direction, and a gap or a nonmagnetic material is provided between the soft magnetic materials adjacent in the circumferential direction,
Each soft magnetic material has a first surface facing the first rotor and a second surface facing the stator, and passes magnetic flux between the first surface and the second surface,
In the stator winding, an alternating current flows through the rotor winding, and a magnetic flux generated by the alternating current in the stator winding flows between the second surface and the first surface of the soft magnetic material and acts on the first rotor. By passing an alternating current, torque acts between the first rotor and the second rotor,
An alternating current is passed through the stator winding, and an alternating current is passed through the rotor winding so that the magnetic flux generated by the alternating current in the rotor winding flows between the first and second surfaces of the soft magnetic material and acts on the stator. The rotating electrical machine system in which torque acts between the stator and the second rotor by flowing

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