JP2011205741A - Drive controller of rotating-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a field of a rotating-electric machine without making the rotating-electric machine configuration complicated, the rotating-electric machine allowing a torque to act between a first rotor and a second rotor and between a stator and the second rotor, by a drive controller of the rotating-electric machine.SOLUTION: A field magnetic flux correction value operation unit 154 calculates a correction value ΔΦof field magnetic flux of a permanent magnet 33 flowing in an input-side rotor 28. A d-axis current command value correction unit 158 corrects a command value Idof a d-axis current of a stator winding wire 20 based on the correction value ΔΦof field magnetic flux calculated by the field magnetic flux correction value operation unit 154, and outputs the corrected command value Idof the d-axis current. A stator winding wire current control unit 160 controls a switching operation of an inverter 40 so that a d-axis current Idand a q-axis current Iqof the stator winding wire 20 coincide with the corrected command value Idof the d-axis current and a command value Iqof the q-axis current, respectively.

Description

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

  The related art of this type of rotating electrical machine drive control device is disclosed in Patent Document 1 below. A drive control device for a rotating electrical machine according to Patent Document 1 includes a first rotor in which windings are disposed and mechanically coupled to an engine, and a magnet that is electromagnetically coupled to the windings of the first rotor. A second rotor mechanically coupled to the stator, a stator provided with a winding electromagnetically coupled to the magnet of the second rotor, a slip ring electrically connected to the winding of the first rotor, A brush that is in electrical contact with the slip ring, a first inverter that is controlled so as to be able to transfer power between the winding of the battery and the stator, and a winding of the battery and the first rotor via the slip ring and the brush. And a second inverter that is controlled so as to be able to exchange power. In Patent Document 1, the power from the engine transmitted to the first rotor is transmitted to the second rotor by electromagnetic coupling between the windings of the first rotor and the magnets of the second rotor. The shaft can be driven. Furthermore, since power can be transferred between the battery and the winding of the first rotor via the second inverter, by controlling the power of the winding of the first rotor by the second inverter, The rotation speed can be controlled. In this case, when the rotation speed of the first rotor is higher than the rotation speed of the second rotor, the generated power of the winding of the first rotor is supplied to the battery side via the second inverter, and the rotation of the first rotor When the speed is lower than the rotational speed of the second rotor, the battery power is supplied to the windings of the first rotor via the second inverter. Further, the electromagnetic coupling between the stator winding and the magnet of the second rotor causes the second rotor to generate power using the electric power supplied from the battery side to the stator winding via the first inverter. Therefore, the torque transmitted to the drive shaft can be controlled by controlling the power supply to the stator winding by the first inverter.

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

  In Patent Document 1, in order to increase the maximum torque that can be generated between the first rotor and the second rotor, it is desirable to increase the field magnetic flux flowing through the first rotor by the magnet of the second rotor. On the other hand, in order to reduce the counter electromotive voltage generated in the first rotor winding and the stator winding during the rotation of the second rotor, the field magnetic flux that flows to the first rotor and the stator by the magnet of the second rotor. It is desirable to reduce Therefore, it is desirable that the field magnetic flux flowing through the first rotor and the stator can be controlled by the 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.

  The present invention provides a drive controller for a rotating electrical machine capable of applying a torque between a first rotor and a second rotor, and between a stator and a second rotor. It aims at performing field control without inviting.

  The drive control device for a rotating electrical machine according to the present invention employs the following means in order to achieve the above-described object.

  A drive control device for a rotating electrical machine according to the present invention is configured to face a first rotor provided with a rotor winding, a stator provided with a stator winding, and the first rotor and the stator. A second rotor that is rotatable relative to the first rotor, wherein the second rotor is provided with a magnet that generates a field magnetic flux that flows through the first rotor and the stator. Torque acts between the first rotor and the second rotor due to the interaction between the alternating current flowing in the rotor winding and the field magnetic flux of the magnet flowing in the first rotor, and the alternating current flowing in the stator winding. A drive control device for a rotating electrical machine in which a torque acts between a stator and a second rotor due to an interaction between a current and a field magnetic flux of a magnet flowing in the stator, and an alternating current flowing in the rotor winding A rotor winding current control unit that controls the stator winding current control unit that controls an alternating current flowing in the stator winding, When performing field control for controlling the field magnetic flux of the magnet flowing through the first rotor, the stator winding current control unit executes the field control by controlling the d-axis current of the stator winding. This is the gist.

  In one aspect of the present invention, the stator winding current control unit flows to the rotor winding when the field control is executed in a state where torque acts between the first rotor and the second rotor. It is preferable to control the d-axis current of the stator winding so that the torque acting between the first rotor and the second rotor becomes the target torque under the condition that the alternating current is limited to the allowable current or less. is there.

  In one aspect of the present invention, the stator winding current control unit, when executing the field control, sets the d-axis of the stator winding so that the counter electromotive voltage generated in the rotor winding is equal to or lower than the set voltage. It is preferable to control the current.

  In one aspect of the present invention, a rectifier capable of rectifying AC power generated in a rotor winding, a DC-DC converter capable of converting voltage of DC power rectified by the rectifier, and DC-DC An inverter capable of converting the DC power converted by the converter into AC and supplying the stator winding, and the rotor winding current control unit controls voltage conversion in the DC-DC converter. By controlling the alternating current flowing through the rotor winding, it is preferable that the stator winding current control unit controls the alternating current flowing through the stator winding by controlling power conversion in the inverter. .

  A drive control device for a rotating electrical machine according to the present invention includes a first rotor provided with a rotor winding, a stator provided with a stator winding, a first rotor and a stator, A second rotor that is opposed to and is rotatable relative to the first rotor, and is provided with a magnet that generates a field magnetic flux that flows through the first rotor and the stator. Due to the interaction between the alternating current flowing through the rotor winding and the field magnetic flux of the magnet flowing through the first rotor, torque acts between the first rotor and the second rotor, and the stator winding A drive control device for a rotating electrical machine in which a torque acts between a stator and a second rotor by an interaction between a flowing AC current and a field magnetic flux of a magnet flowing in the stator, and flows in the rotor winding Rotor winding current control unit that controls AC current and stator winding current control that controls AC current that flows through the stator winding When the field control for controlling the magnetic field flux of the magnet flowing through the stator is executed, the rotor winding current control unit executes the field control by controlling the d-axis current of the rotor winding. The gist is to do.

  According to the present invention, it is possible to obtain the same effect as apparently changing the magnet amount without separately adding a field winding for controlling the field magnetic flux to the second rotor. Field control can be performed without complicating the configuration of the above.

It is a figure which shows schematic structure of a hybrid drive device provided with the drive control apparatus of the rotary electric machine which concerns on embodiment of this invention. It is a figure which shows schematic structure of the drive control apparatus of the rotary electric machine which concerns on embodiment of this invention. FIG. 3 is a diagram illustrating a configuration example of an input side rotor 28, an output side rotor 18, and a stator 16. FIG. 3 is a diagram illustrating a configuration example of an input side rotor 28, an output side rotor 18, and a stator 16. FIG. 4 is a diagram for explaining the flow of magnetic flux in an input side rotor and an output side rotor. It is a figure explaining the flow of the magnetic flux in the output side rotor 18 and the stator 16. FIG. It is a figure which shows the mode of a magnetic flux line at the time of flowing an alternating current only into the rotor coil | winding 30, without flowing an alternating current through the stator winding 20. FIG. FIG. 3 is a diagram showing a state of magnetic flux lines when an alternating current is passed through not only the rotor winding 30 but also the stator winding 20 simultaneously. 3 is a functional block diagram illustrating a configuration example of an electronic control unit 50. FIG. It is a figure which shows the relationship between the differential rotational speed, the electric current of the rotor coil | winding 30, and electromagnetic coupling torque. It is a figure which shows the relationship between a differential rotational speed and electromagnetic coupling torque. It is a flowchart which shows an example of the process which the electronic control unit 50 performs when generating an electromagnetic coupling torque. It is a figure which shows the result of having investigated the change of the counter electromotive voltage which generate | occur | produces in the rotor coil | winding 30 when the current phase of the stator coil | winding 20 is changed. It is a flowchart which shows an example of the process which the electronic control unit 50 performs when performing EV driving | running | working. It is a figure which shows the other schematic structure of the drive control apparatus of the rotary electric machine which concerns on embodiment of this invention. FIG. 5 is a diagram illustrating another configuration example of the input side rotor 28, the output side rotor 18, and the stator 16. FIG. 5 is a diagram illustrating another configuration example of the input side rotor 28, the output side rotor 18, and the stator 16. FIG. 5 is a diagram illustrating another configuration example of the input side rotor 28, the output side rotor 18, and the stator 16.

  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 and 2 are diagrams showing an outline of a configuration of a hybrid drive device including a drive control device for a rotating electrical machine according to an embodiment of the present invention, FIG. 1 shows an overview of the overall configuration, and FIG. The outline of the structure of is shown. The hybrid drive device according to the present embodiment includes an engine (internal combustion engine) 36 provided as a prime mover capable of generating power (mechanical power), a transmission 44 provided between the engine 36 and wheels 38, And the rotating electrical machine 10 provided between the engine 36 and the transmission 44. In addition, about the hybrid drive device which concerns on this embodiment, it can be used as a power output device for driving a vehicle, for example.

  The rotating electrical machine 10 includes a stator 16 fixed to a stator case (not shown), a first rotor 28 that can rotate relative to the stator 16, a stator 16 and a first rotor 28 in a radial direction perpendicular to the rotor rotation axis, and a predetermined amount. The second rotor 18 is opposed to the stator 16 and the first rotor 28 with a gap. The stator 16 is disposed at a position radially outward from the first rotor 28 and spaced from the first rotor 28, and the second rotor 18 is positioned between the stator 16 and the first rotor 28 in the radial direction. Is arranged. 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. The first rotor 28 is mechanically connected to the input shaft 34 of the rotating electrical machine 10, and the input shaft 34 is mechanically connected to the engine 36, so that the input shaft 34 (first rotor 28) is connected to the engine 36. Power is transmitted. On the other hand, the second rotor 18 is mechanically connected to the output shaft 24 of the rotating electrical machine 10, and the output shaft 24 is mechanically connected to the wheel 38 via the transmission 44. The power from the output shaft 24 (second rotor 18) is transmitted after being shifted by the transmission 44. 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 conductors) 20 disposed on the stator core 51 along the circumferential direction thereof. 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.

  The input-side rotor 28 includes a rotor core (first rotor core) 52 and a plurality of (for example, three-phase) rotor windings (rotor conductors) 30 disposed on the rotor core 52 along the circumferential direction thereof. Including. 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.

  The output-side rotor 18 includes a rotor core (second rotor core) 53 and a plurality of permanent magnets 33 that are disposed along the circumferential direction of the rotor core 53 and generate a field magnetic flux. Each permanent magnet 33 is disposed on the inner peripheral portion of the rotor core 53 so as to face the input-side rotor 28 (rotor core 52).

  3 and 4 show more detailed configuration examples of the input side rotor 28, the output side rotor 18, and the stator 16. FIG. FIG. 3 illustrates a part of the configuration of the input-side rotor 28, the output-side rotor 18, and the stator 16 with respect to the circumferential direction. However, the structure of the remaining part which is not illustrated in FIG. 3 is the same structure as the illustrated part. In the example shown in FIGS. 3 and 4, the input side rotor 28, the output side rotor 18, and the stator 16 are arranged concentrically. A plurality of stator teeth 51a protruding radially inward (toward the output side rotor 18) are arranged on the stator core 51 of the stator 16 at intervals along the circumferential direction of the stator. The magnetic pole is comprised by being wound by these stator teeth 51a. In the rotor core 52 of the input side rotor 28, a plurality of rotor teeth 52a protruding radially outward (toward the output side rotor 18) are arranged at intervals along the rotor circumferential direction. 30 is wound around these rotor teeth 52a to form a magnetic pole.

  In the output side rotor 18, a plurality of permanent magnets 33 are arranged along the circumferential direction in a state where the permanent magnets 33 are exposed on the inner peripheral surface facing the input side rotor 28. In the example shown in FIGS. 3 and 4, the plurality of permanent magnets 33 are arranged without any interval in the circumferential direction. The magnetization direction of each permanent magnet 33 coincides with (or substantially coincides with) the radial direction orthogonal to the rotor rotation axis (the direction in which the output-side rotor 18 faces the input-side rotor 28 and the stator 16). The inner peripheral surface 33a and the outer peripheral surface 33b function as magnetic pole surfaces. In the example shown in FIGS. 3 and 4, each permanent magnet 33 has a curved shape, and each magnetic pole surface 33a, 33b is a curved surface. The plurality of permanent magnets 33 are arranged so that the magnetic poles of the magnetic pole surfaces 33a and 33b alternate in the circumferential direction (rotor rotation direction) ("N pole" and "S pole" are alternately arranged), that is, adjacent permanent magnets 33 It is arranged so that the magnetization direction is reversed. The magnetic pole surface 33a on the inner peripheral side of each permanent magnet 33 is arranged to face the rotor teeth 52a in a state exposed on the inner peripheral surface of the output-side rotor 18, and the field magnetic flux generated on the magnetic pole surface 33a of each permanent magnet 33. Acts on the input-side rotor 28. The inner peripheral surface 53a of the rotor core 53 is coupled to the magnetic pole surface 33b on the outer peripheral side of the permanent magnet 33, and the outer peripheral surface 53b of the rotor core 53 is disposed to face the stator teeth 51a. That is, the rotor core 53 is provided from the coupling surface with the permanent magnet 33 to the surface facing the stator 16 in the radial direction in which the output side rotor 18 faces the input side rotor 28 and the stator 16. And the permanent magnet is not provided in the outer peripheral part facing the stator 16 in the output side rotor 18, but the rotor core 53 is arrange | positioned. The field magnetic flux generated at the magnetic pole surface 33 b of each permanent magnet 33 acts on the stator 16 via the rotor core 53. As described above, the permanent magnet that generates the field magnetic flux that flows in the input-side rotor 28 and the permanent magnet that generates the field magnetic flux that flows in the stator 16 are shared. The rotor core 53 can be formed, for example, by laminating thin silicon steel plates (electromagnetic steel plates) in the rotor rotation axis direction.

  Further, the rotor core 53 of the output-side rotor 18 is formed with a plurality of gaps 54 for suppressing leakage magnetic flux that passes through the rotor core 53 between the magnetic pole surfaces 33b of the permanent magnets 33 adjacent in the circumferential direction. The plurality of air gaps 54 are arranged on the stator 16 side (radially outward) with respect to the permanent magnet 33, and are arranged at intervals equal to (or substantially equal to) the width of the permanent magnet 33 in the circumferential direction. As shown in FIG. 4, each air gap 54 of the rotor core 53 extends in the radial direction, and the radially inner end is located in the vicinity of the adjacent portion 33 c between the magnetic pole surfaces 33 b of the permanent magnet 33. The portion is located near the outer peripheral surface 53 b of the rotor core 53. That is, each air gap 54 of the rotor core 53 is located near the outer peripheral surface 53b facing the stator 16 from the vicinity of the adjacent portion 33c between the magnetic pole surfaces 33b of the permanent magnet 33 with respect to the radial direction that is the facing direction of the input side rotor 28 and the stator 16. It is formed over. In the output side rotor 18, the magnetic resistance when the magnetic flux from the stator 16 passes is changed by the air gap 54 according to the rotation direction, and the magnetic resistance is increased at the position of the air gap 54. With respect to the width (length in the circumferential direction) of each gap 54, the length a on the stator 16 side (radially outer end) is longer than the length b on the permanent magnet 33 side (radially inner end). It gradually increases from the magnet 33 side (radially inner end) toward the stator 16 side (radially outer end). In the example shown in FIG. 4, a magnetic bridging portion 53 c is provided between the radially inner end portion of the gap 54 and the adjacent portion 33 c of the magnetic pole surfaces 33 b of the permanent magnet 33, and the radially outer end of the gap 54. A magnetic bridging portion 53d is provided between this portion and the outer peripheral surface 53b of the output side rotor 18 (rotor core 53). However, it is possible to omit the magnetic bridging portion 53c and extend the radially inner end of the gap 54 to the adjacent portion 33c between the magnetic pole surfaces 33b of the permanent magnet 33, or the magnetic bridging portion 53d. Can be omitted, and the radially outer end of the gap 54 can be extended to the outer peripheral surface 53 b facing the stator 16. Further, a nonmagnetic material can be provided in the output-side rotor 18 instead of the gap 54 in order to suppress leakage magnetic flux that passes through the rotor core 53 between the magnetic pole surfaces 33b of the permanent magnets 33 adjacent in the circumferential direction. . In that case, what is necessary is just to consider what replaced the “air gap 54” with “non-magnetic material” in the above description.

  The clutch 48 can selectively perform mechanical engagement between the input shaft 34 (input-side rotor 28) and the output shaft 24 (output-side rotor 18) and release thereof by engagement / release. By engaging the clutch 48 and mechanically engaging the input-side rotor 28 and the output-side rotor 18, the input-side rotor 28 and the output-side rotor 18 are integrally rotated at the same rotational speed. On the other hand, by releasing the clutch 48 and releasing the mechanical engagement between the input-side rotor 28 and the output-side rotor 18, a difference in rotational speed between the input-side rotor 28 and the output-side rotor 18 is allowed. Here, the clutch 48 can be switched between engagement and disengagement using, for example, hydraulic pressure or electromagnetic force. Further, by adjusting the hydraulic pressure or electromagnetic force supplied to the clutch 48, The fastening force can also be adjusted.

  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. The inverter 40 can be realized by a known configuration including a switching element and a diode (rectifier element) connected in reverse parallel to the switching element. The inverter 40 converts the DC power from the power storage device 42 to AC ( For example, it can be converted into a three-phase alternating current) and supplied to each phase of the stator winding 20. 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 rectifier 93, and power from the brush 96 is supplied to the rectifier 93. The slip ring 95 and the brush 96 can constitute a power transmission unit for extracting the power (AC power) of the rotor winding 30 of the input side rotor 28, and the extracted AC power is supplied to the rectifier 93. .

  The rectifier 93 rectifies the AC power from the rotor winding 30 taken out by the slip ring 95 and the brush 96 with a diode (rectifier element) and converts it into DC. The step-up converter (DC-DC converter) 94 can be realized by a known configuration including a switching element and a diode (rectifier element), and boosts (voltage conversion) DC power rectified by the rectifier 93 by the switching operation of the switching element. And output. The DC power boosted (voltage converted) by the boost converter 94 can be supplied to each phase of the stator winding 20 after being converted to AC by the inverter 40. That is, inverter 40 can convert either (at least one) of the DC power boosted by boost converter 94 and the DC power from power storage device 42 to AC and supply it to each phase of stator winding 20. It is. Therefore, power conversion can be performed between the rotor winding 30 and the stator winding 20. Further, the DC power boosted by the boost converter 94 can be recovered by the power storage device 42. Here, rectifier 93 performs power conversion in only one direction from slip ring 95 side to boost converter 94 side, and boost converter 94 is unidirectional from rectifier 93 side to power storage device 42 side (or inverter 40 side). Only perform power conversion. Therefore, rectifier 93 and boost converter 94 perform power conversion in only one direction from rotor winding 30 side to power storage device 42 side (or inverter 40 side). Instead of the step-up converter 94, a step-down converter or a step-up / step-down converter can be provided as a DC-DC converter.

  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 duty ratio when the switching element of the boost converter 94 is switched, and controls the boost ratio (voltage conversion ratio) in the boost converter 94, so that the rotor winding 30 The alternating current flowing in each phase is controlled. The electronic control unit 50 also performs control for switching mechanical engagement / release of the input side rotor 28 and the output side rotor 18 by switching engagement / release of the clutch 48. Furthermore, the electronic control unit 50 also controls the operating state of the engine 36 and the speed ratio of the transmission 44.

  As the input side rotor 28 rotates relative to the output side rotor 18, a rotational difference occurs between the input side rotor 28 (rotor winding 30) and the output side rotor 18 (permanent magnet 33). An induced electromotive force is generated at 30, and an induced current (alternating current) flows through the rotor winding 30 due to the induced electromotive force, thereby generating a rotating magnetic field. Further, torque can be applied to the output-side rotor 18 by electromagnetic interaction between the rotating magnetic field generated by the induced current of the rotor winding 30 and the field magnetic flux flowing from the permanent magnet 33 to the input-side rotor 28. 18 can be rotationally driven. As described above, the rotor winding 30 of the input-side rotor 28 and the permanent magnet 33 of the output-side rotor 18 are electromagnetically coupled, so that the rotating magnetic field generated in the rotor winding 30 acts on the output-side rotor 18. As a result, torque (magnet torque) acts between the input-side rotor 28 and the output-side rotor 18. 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 generating torque (hereinafter referred to as electromagnetic coupling torque) 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 outputs the output of the boost converter 94. The boost ratio in boost converter 94 is controlled so that the voltage is higher than the voltage of power storage device 42. As a result, a current flows from the boost converter 94 to the wiring between the power storage device 42 and the inverter 40, and an induced current flows through the rotor winding 30. Works. In that case, the electronic control unit 50 acts between the input-side rotor 28 and the output-side rotor 18 by controlling the alternating current flowing through the rotor winding 30 by controlling the boost ratio in the boost converter 94. The electromagnetic coupling torque can be controlled (see also Patent Documents 2 and 3). On the other hand, the electronic control unit 50 controls the boost ratio in the boost converter 94 so that the output voltage of the boost converter 94 is lower than the voltage of the power storage device 42 in a state where the switching operation of the inverter 40 is not performed. Even if a rotational difference occurs between the side rotor 28 and the output side rotor 18, no induced current flows through the rotor winding 30, and no electromagnetic coupling torque acts between the input side rotor 28 and the output side rotor 18. . Also, by stopping the boosting (voltage conversion) by the boost converter 94 while maintaining the switching element in the boost converter 94 in the off state, the induced current does not flow through the rotor winding 30, and the input side rotor 28 and the output side The electromagnetic coupling torque does not act between the rotor 18 and the rotor 18.

  When electromagnetic coupling torque is generated between the input side rotor 28 and the output side rotor 18, as shown in FIG. 5, the inner peripheral side magnetic pole surface 33 a of each permanent magnet 33 has an inner periphery of the output side rotor 18. Since it faces the input-side rotor 28 while being exposed to the surface, the magnetic flux on the inner peripheral side magnetic pole surface 33a of the permanent magnet 33 is input between the inner peripheral side magnetic pole surfaces 33a of the permanent magnets 33 adjacent in the circumferential direction. The effective magnetic flux 61 that contributes to the torque (magnet torque) is dominant by flowing through the side rotor 28 (rotor core 52). Therefore, the effective magnetic flux 61 that contributes to the torque can be increased, and the leakage magnetic flux that does not contribute to the torque can be reduced. Therefore, it is possible to increase the magnet torque between the input side rotor 28 and the output side rotor 18, which is generated by the induced current that flows passively in the rotor winding 30, and input power without supplying power to the rotor winding 30. The torque between the side rotor 28 and the output side rotor 18 can be increased. As a result, the torque between the input-side rotor 28 and the output-side rotor 18 can be increased even when the power storage amount of the power storage device 42 is small or at an extremely low temperature. Furthermore, it is possible to prevent the occurrence of power circulation caused by supplying the power of the stator winding 20 to the rotor winding 30. In the present embodiment, as shown in FIG. 5, it does not contribute to the torque by flowing between the inner peripheral side magnetic pole surfaces 33a of the permanent magnets 33 adjacent to each other in the circumferential direction via the gap without passing through the input side rotor 28. Leakage magnetic flux 63 is also generated, but this leakage magnetic flux 63 is slight.

  Further, when a plurality of phases (for example, three phases) of alternating current flows through the plurality of stator windings 20 by the switching operation of the inverter 40, the stator windings 20 generate a rotating magnetic field that rotates in the circumferential direction of the stator. Then, torque (magnet torque) is applied to the output-side rotor 18 by 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 flowing from the permanent magnet 33 to the stator 16. 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 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 used as a synchronous motor (PM motor unit). Can function. Further, the inverter 40 can also convert the alternating current flowing in each phase of the stator winding 20 into a direct current and recover the electric energy in the power storage device 42. In that case, the motive power of the output-side rotor 18 is converted into the electric power of the stator winding 20 and recovered by the power storage device 42. As described above, the stator winding 20 of the stator 16 and the permanent magnet 33 of the output-side rotor 18 are electromagnetically coupled, so that the rotating magnetic field generated in the stator winding 20 acts on the output-side rotor 18. A torque (magnet torque) can be applied between the stator 16 and the output-side rotor 18. Further, in the output-side rotor 18, the magnetic resistance when the magnetic flux from the stator 16 passes changes according to the rotation direction due to the gap 54, so that the rotating magnetic field generated by the stator 16 acts on the output-side rotor 18. Accordingly, reluctance torque acts between the stator 16 and the output side rotor 18 in addition to the magnet torque. The electronic control unit 50 controls the torque (hereinafter referred to as MG) 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. Torque).

  When MG torque is generated between the stator 16 and the output side rotor 18, the magnetic flux 74 of the outer peripheral side magnetic pole surface 33 b of the permanent magnet 33 is transferred to the stator 16 (stator core 51 via the rotor core 53 as shown in FIG. 6. ). Therefore, this magnetic flux 74 works as an effective magnetic flux that contributes to torque (magnet torque) by flowing between the outer peripheral side magnetic pole surfaces 33b of the permanent magnets 33 adjacent in the circumferential direction via the stator 16 (stator core 51). Further, since the leakage magnetic flux 75 that passes through the rotor core 53 without passing through the stator 16 between the outer peripheral side magnetic pole surfaces 33b of the permanent magnets 33 adjacent in the circumferential direction is suppressed by the air gap 54, the effective magnetic flux 74 that contributes to the magnet torque is suppressed. Can be increased. At that time, the width b of the air gap 54 on the permanent magnet 33 side (radially inner end) is reduced, and the width a of the air gap 54 on the stator 16 side (radially outer end) is increased. It is possible to reduce the leakage magnetic flux 75 that does not contribute to torque while preventing the flow of the effective magnetic flux 74 on the outer peripheral side magnetic pole surface 33 b of the 33 from being obstructed by the air gap 54. And the reduction | decrease of the effective magnetic flux 61 which contributes to the torque between the input side rotor 28 and the output side rotor 18 can also be suppressed by making the width | variety b by the side of the permanent magnet 33 of the space | gap 54 small. Further, in the present embodiment, the effective magnetic flux 76 that contributes to the reluctance torque is also generated by flowing between the stator teeth 51 a magnetized by the current flowing through the stator winding 20 via the rotor core 53. By using the reluctance torque together with the magnet torque, the torque between the stator 16 and the output-side rotor 18 can be increased. By changing the shape of the gap 54, it is also possible to change the magnetic characteristics such as the distribution of the magnet torque and the reluctance torque.

  Next, the operation of driving the wheel 38 in the hybrid drive device according to the present embodiment will be described.

  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 in a state where the clutch 48 is released, an induced electromotive force is generated in the rotor winding 30. The electronic control unit 50 controls the boost ratio in the boost converter 94 so that the output voltage of the boost converter 94 is higher than the voltage of the power storage device 42, so that the rotor winding 30 is connected via the slip ring 95 and the brush 96. Inductive current (alternating current) flows through the electromagnetic field, and electromagnetic coupling between the induced current and the field magnetic flux flowing from the permanent magnet 33 to the input side rotor 28 causes electromagnetic coupling in the engine rotation direction from the input side rotor 28 to the output side rotor 18. Torque acts to drive the output side rotor 18 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 wheels 38 after being shifted by the transmission 44 and used for forward rotation driving of the load such as forward driving 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 rectified to DC by a rectifier 93, and the rectified DC power is boosted by a boost converter 94. Then, the DC power from the boost converter 94 is converted into AC by the inverter 40 and then supplied to the stator winding 20, whereby a rotating magnetic field is formed in the stator 16. The MG torque in the engine rotation direction can be applied to the output side rotor 18 also by electromagnetic interaction between the rotating magnetic field of the stator 16 and the field magnetic flux flowing from the permanent magnet 33 of the output side rotor 18 to the stator 16. 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 boost converter 94 in 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 wheel 38 is driven to rotate. 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. In addition, when performing EV traveling, the clutch 48 is controlled to a released state.

  In this embodiment, in order to increase the electromagnetic coupling torque (maximum torque) that can be generated between the input-side rotor 28 and the output-side rotor 18, the permanent magnet 33 of the output-side rotor 18 causes the input-side rotor 28 to It is desirable to increase the amount of flowing field magnetic flux. On the other hand, in order to reduce the counter electromotive voltage generated in the rotor winding 30 and the stator winding 20 when the output side rotor 18 rotates, the permanent magnet 33 of the output side rotor 18 causes the input side rotor 28 and the stator 16 to move. It is desirable to reduce the amount of flowing field magnetic flux. Therefore, in the present embodiment, it is desirable that the amount of field magnetic flux flowing by the permanent magnet 33 of the output side rotor 18 can be controlled.

  In the rotating electrical machine 10 of the present embodiment, the results of calculating the magnetic flux flowing through the input side rotor 28, the output side rotor 18, and the stator 16 are shown in FIGS. FIG. 7 shows the state of magnetic flux lines when an alternating current is passed only through the rotor winding 30 without passing an alternating current through the stator winding 20. On the other hand, FIG. 8 shows a state of magnetic flux lines when an alternating current is simultaneously supplied to not only the rotor winding 30 but also the stator winding 20. In FIG. 8, in the case where an alternating current is passed through the stator winding 20 so that the direction of the magnetic flux 72 due to the alternating current of the stator winding 20 is the same direction as the direction of the magnetic flux 71 by the permanent magnet 33 (strong field direction). The state of magnetic flux lines is shown. In the present embodiment, the field magnetic flux generated by the common permanent magnet 33 flows through the stator 16 (stator teeth 51a) and interacts electromagnetically with the magnetic flux generated by the alternating current of the stator winding 20, and the input side rotor 28 (rotor It flows through the teeth 52a) and interacts electromagnetically with the magnetic flux generated by the alternating current of the rotor winding 30. Therefore, by passing an alternating current (d-axis current) through the stator winding 20 so that the direction of the magnetic flux due to the alternating current of the stator winding 20 is the same direction as the direction of the magnetic flux by the permanent magnet 33 (strong field direction). The amount of field magnetic flux generated on the outer peripheral side magnetic pole surface 33b of the permanent magnet 33 and interlinked with the stator winding 20 increases, and generated on the inner peripheral side magnetic pole surface 33a of the permanent magnet 33 and connected to the rotor winding 30. The amount of field magnetic flux to be increased also increases. On the other hand, by passing an alternating current (d-axis current) through the stator winding 20 so that the direction of the magnetic flux by the alternating current of the stator winding 20 is opposite to the direction of the magnetic flux by the permanent magnet 33 (field weakening direction). The amount of field magnetic flux generated on the outer peripheral side magnetic pole surface 33b of the permanent magnet 33 and interlinked with the stator winding 20 is reduced, and generated on the inner peripheral side magnetic pole surface 33a of the permanent magnet 33 and connected to the rotor winding 30. The amount of field magnetic flux to be reduced also decreases. Therefore, in the present embodiment, the field control for controlling the field magnetic flux amount of the permanent magnet 33 that flows in the input side rotor 28 (linked to the rotor winding 30) by controlling the d-axis current of the stator winding 20 is performed. Can be executed.

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 151 is provided between the input-side rotor 28 and the output-side rotor 18 based on, for example, the accelerator opening A (required driving force of the wheel 38) and the vehicle speed V (rotational speed of the wheel 38). A command value T _{coup_ref} of the electromagnetic coupling torque that acts on is calculated. The rotor winding current command value calculation unit 152 includes a rotational speed difference ω _in −ω _out between the input side rotor 28 and the output side rotor 18, and an electromagnetic coupling torque command calculated by the coupling torque command value calculation unit 151. Based on the value T _{coup_ref} , a command value I _{coup_ref} of the current of the rotor winding 30 is calculated. Rotor winding current control unit 153, so that the current _{I coup} rotor winding 30 is coincident to the calculated command value _{I Coup_ref} in rotor winding current command value calculating section 152, the step-up ratio (voltage step-up converter 94 The conversion ratio). 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 coupling torque command value calculation unit 151.

The field magnetic flux correction value calculation unit 154 includes the rotational speed difference ω _in −ω _out between the input side rotor 28 and the output side rotor 18, and the current of the rotor winding 30 calculated by the rotor winding current command value calculation unit 152. Based on the command value I _{cup_ref} , the field magnetic flux correction value ΔΦ _{coup_ref} of the permanent magnet 33 flowing in the input side rotor 28 (linked to the rotor winding 30) is calculated. The MG torque command value calculation unit 155 is based on, for example, the accelerator opening A (required driving force of the wheel 38) and the electromagnetic coupling torque command value _{Tcoup_ref} calculated by the coupling torque command value calculation unit 151. A command value T _{mg_ref} for the MG torque acting between the stator 16 and the output side rotor 18 is calculated. 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. A command value Id _{mg_temp} of the shaft current 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. The corrected d-axis current command value Id _{mg_ref} is output. The q-axis current command value correction unit 159 corrects the command value Iq _{mg_temp} of the q-axis current of the stator winding 20 based on the command value Id _{mg_ref} of the d-axis current corrected by the d-axis current command value correction unit 158. The corrected q-axis current command value Iq _{mg_ref} is output. 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 command value Iq _{mg_ref} of the q-axis current corrected by the command value correction unit 159. As a result, the MG torque T _mg acting between the input side rotor 28 and the output side rotor 18 is controlled to coincide with the command value T _{mg_ref} calculated by the MG torque command value calculation unit 155. Further, the d axis of the stator winding 20 is set so that the correction amount ΔΦ _coup of the field magnetic flux of the permanent magnet 33 flowing in the input side rotor 28 matches the correction value ΔΦ _{coup_ref} calculated by the field magnetic flux correction value calculation unit 154. The current Id _mg is controlled.

In the present embodiment, due to the differential rotational speed ω _in −ω _out between the input side rotor 28 and the output side rotor 18, a counter electromotive voltage is generated in the rotor winding 30 and the current I _coup flows. An electromagnetic coupling torque T _coup is generated between the input side rotor 28 and the output side rotor 18. At this time, if there is no change in the equivalent resistance of the external circuit of the rotor winding 30 (step-up ratio in the step-up converter 94), the current I _couple of the rotor winding 30 increases with the differential rotational speed ω _in −ω _out. The electromagnetic coupling torque T _coup reaches a peak at a certain differential rotational speed ω _in −ω _{out as the} current phase changes (see FIG. 10). The maximum value of the electromagnetic coupling torque T _coup can be increased by increasing the amount of field magnetic flux of the permanent magnet 33 flowing in the input side rotor 28. However, the increase in the magnet amount (thickness) of the permanent magnet 33 is In addition to increasing the cost of the rotating electrical machine 10, the counter electromotive voltage generated in the rotor winding 30 and the stator winding 20 is increased. Therefore, in the present embodiment, the field magnetic flux correction value calculation unit 154 calculates the field magnetic flux correction value ΔΦ _{coup_ref} so as to increase the field magnetic flux amount of the permanent magnet 33 flowing in the input side rotor 28, and the stator winding The line current control unit 160 controls the d-axis current Id _mg of the stator winding 20 to match the command value Id _{mg_ref} of the d-axis current corrected based on the correction value ΔΦ _{coup_ref} of the field magnetic flux. Then, the strong field control for increasing the field magnetic flux amount of the permanent magnet 33 flowing in the input side rotor 28 is executed. This strong field, to obtain a substantially equivalent effect as temporarily increasing the magnet volume of the permanent magnet 33, to increase the maximum value of the electromagnetic coupling torque T _coup. FIG. 11 shows the relationship between the differential rotational speed ω _in −ω _out and the electromagnetic coupling torque T _coup when the strong field control by the d-axis current control of the stator winding 20 is performed and when the strong field control is not performed. . As shown in FIG. 11, by performing the field-strengthening control by the d-axis current control of the stator winding 20, it is possible to increase the maximum value of the electromagnetic coupling torque T _coup.

An example of processing executed by the electronic control unit 50 when the electromagnetic coupling torque T _coup is generated between the input side rotor 28 and the output side rotor 18 is shown in FIG. First, in step S _<b> 101, an electromagnetic coupling torque command value T _{coup_ref} is calculated by the coupling torque command value calculation unit 151. In step S102, based on the electromagnetic coupling torque command value _{Tcoup_ref} computed in step S101, the rotor winding current command value _{Icoup_ref} is _computed by the rotor winding current command value computing unit 152. In step S103, the field magnetic flux correction value calculation unit 154 determines whether or not the command value I _{coup_ref} of the current of the rotor winding 30 calculated in step S102 is equal to or _smaller than the allowable current value I _{coup_lim} . When the command value I _{coup_ref} of the current of the rotor winding 30 is equal to or _smaller than the allowable current value I _{coup_lim} (when the determination result of step S103 is YES), Id _{mg_ref} = Id _{mg_temp} , Iq _{mg_ref} = Iq _{mg_temp,} and the _{process proceeds} to step S108. move on. On the other hand, when the command value I _{coup_ref} of the current of the rotor winding 30 is larger than the allowable current value I _{coup_lim} (when the determination result of step S103 is NO), the process proceeds to step S104.

In step S104, the direction of the magnetic flux by the d-axis current Id _mg of the stator winding 20 is the same as the direction of the magnetic flux by the permanent magnet 33, so that the amount of field magnetic flux of the permanent magnet 33 flowing to the input side rotor 28 is increased. 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 correction value ΔΦ _{coup_ref} of the field magnetic flux so as to perform (strong field control). In step S105, the d corrected in step S104 is performed so that the MG torque T _mg acting between the input side rotor 28 and the output side rotor 18 does not change due to the correction of the d-axis current Id _mg of the stator winding 20. 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 shaft current command value Id _{mg_ref} . In step S106, the correction of the field magnetic flux amount of the permanent magnet 33 flowing through the input side rotor 28 (strong field) as the electromagnetic coupling torque _{T coup} does not change (increase), the command value of the electromagnetic coupling torque _{T Coup_ref} And the field winding magnetic flux correction value ΔΦ _{coup_ref} , the rotor winding 30 current command value I _{coup_ref} is calculated again by the rotor winding current command value calculation unit 152. In step S107, the field magnetic flux correction value calculation unit 154 determines whether or not the command value I _{coup_ref} of the current of the rotor winding 30 calculated again in step S106 is equal to or _smaller than the allowable current value I _{coup_lim} . When the command value I _{coup_ref} of the current of the rotor winding 30 is larger than the allowable current value I _{coup_lim} (when the determination result of step S107 is NO), the process returns to step S104, and the field of the permanent magnet 33 flowing to the input side rotor 28 is returned. The d-axis current command value correction unit 158 corrects the d-axis current command value Id _{mg_temp of} the stator winding 20 based on the field flux correction value ΔΦ _{coup_ref} so as to further increase the magnetic flux amount. On the other hand, when the command value I _{coup_ref} of the current of the rotor winding 30 is equal to or _smaller than the allowable current value I _{coup_lim} (when the determination result of step S107 is YES), the process proceeds to step S108.

In step S108, the current I _cup of the rotor winding 30 is set to the command value I _{cup — ref} calculated in step S102 (when the determination result of step S103 is YES) or step S106 (when the determination result of step S107 is YES). The rotor winding current control unit 153 is controlled so as to match. As a result, the electromagnetic coupling torque T _coup is controlled to coincide with the command value T _{coup_ref} calculated in step S101. In step S109, the stator winding current control is performed so that the d-axis current Id _mg and the q-axis current Iq _mg of the stator winding 20 coincide with the d-axis current command value Id _{mg_ref} and the q-axis current command value Iq _{mg_ref} , respectively. Controlled by the unit 160. As a result, the MG torque T _mg is controlled to coincide with the command value T _{mg_ref,} and the field magnetic flux amount of the permanent magnet 33 flowing to the input side rotor 28 is increased by the correction amount ΔΦ _coup (strong field control is performed). Thus, the d-axis current Id _mg of the stator winding 20 is controlled.

According to the processing of the flowchart of FIG. 12 described above, the field of the permanent magnet 33 that flows in the input-side rotor 28 in a state where the electromagnetic coupling torque T _coup acts between the input-side rotor 28 and the output-side rotor 18. When the strong field control for increasing the amount of magnetic flux is executed, the electromagnetic coupling torque T _coup is set to the command value (target torque) T _{coup_ref} under the condition that the current I _coup of the rotor winding 30 is limited to the allowable current value I _{coup_lim} or less. Thus, the d-axis current Id _mg of the stator winding 20 is controlled by the stator winding current control unit 160. By executing the strong field control by the d-axis current control of the stator winding 20, it is possible to obtain an effect equivalent to the apparent increase in the magnet amount of the permanent magnet 33. As a result, the current I _coup of the rotor winding 30 is suppressed to the allowable current value I _{coup — lim} or less without actually increasing the magnet amount of the permanent magnet 33, and between the input side rotor 28 and the output side rotor 18. The maximum value of the acting electromagnetic coupling torque T _coup can be increased.

In the present embodiment, the field magnetic flux correction value calculation unit 154 calculates the field magnetic flux correction value ΔΦ _{coup_ref} so as to reduce the field magnetic flux amount of the permanent magnet 33 flowing in the input side rotor 28, and the stator winding The line current control unit 160 controls the d-axis current Id _mg of the stator winding 20 to match the command value Id _{mg_ref} of the d-axis current corrected based on the correction value ΔΦ _{coup_ref} of the field magnetic flux. It is also possible to execute field-weakening control that reduces the amount of field magnetic flux of the permanent magnet 33 that flows to the input-side rotor 28. By this field-weakening control, the back electromotive force generated in the rotor winding 30 and the stator winding 20 can be reduced by obtaining substantially the same effect as the amount of the permanent magnet 33 temporarily reduced. Can do. FIG. 13 shows the result of examining the change in the counter electromotive voltage generated in the rotor winding 30 when the d-axis current Id _mg of the stator winding 20 is changed to change the current phase of the stator winding 20. As shown in FIG. 13, the counter electromotive voltage generated in the rotor winding 30 can be reduced by advancing the current phase of the stator winding 20.

FIG. 14 shows an example of processing executed by the electronic control unit 50 when EV traveling is performed with the MG torque T _mg acting between the stator 16 and the output-side rotor 18. First, in step S 201, the MG torque command value T _{mg_ref} is calculated by the MG torque command value calculation unit 155. In step S202, based on the MG torque command value _{Tmg_ref} calculated in step S201, the d-axis current command value _{Idmg_temp} and the q-axis current command value _{Iqmg_temp of} the stator winding 20 are _converted into the d-axis current command value. Calculation is performed by the calculation unit 156 and the q-axis current command value calculation unit 157, respectively. In step S203, it is determined whether or not the back electromotive voltage V _coup of the rotor winding 30 calculated based on the rotational speed ω _out of the output side rotor 18 is equal to or _lower than the set voltage value V _{coup_lim.} Determined at 154. The set voltage value V _{cup — lim} here is set based on the voltage of the power storage device 42, for example. When the back electromotive voltage V _coup of the rotor winding 30 is equal to or lower than the set voltage value V _{coup_lim} (when the determination result in step S203 is YES), Id _{mg_ref} = Id _{mg_temp} , Iq _{mg_ref} = Iq _{mg_temp,} and the process proceeds to step S207. . On the other hand, when the counter electromotive voltage V _coup of the rotor winding 30 is larger than the set voltage value V _{coup_lim} (when the determination result of step S203 is NO), the process proceeds to step S204.

In step S204, the direction of the magnetic flux by the d-axis current Id _mg of the stator winding 20 is opposite to the direction of the magnetic flux by the permanent magnet 33, thereby reducing the amount of field magnetic flux of the permanent magnet 33 flowing to the input side rotor 28. The command value Id _{mg_temp} of the d-axis current of the stator winding 20 is corrected by the d-axis current command value correction unit 158 based on the correction value ΔΦ _{coup_ref} of the field magnetic flux so that the field weakening control is performed. In step S205, the d corrected in step S204 is performed so that the MG torque T _mg acting between the input side rotor 28 and the output side rotor 18 does not change due to the correction of the d-axis current Id _mg of the stator winding 20. 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 shaft current command value Id _{mg_ref} . In step S206, _whether the back electromotive voltage V _coup of the rotor winding 30 calculated based on the rotation speed ω _out of the output side rotor 18 and the field magnetic flux correction value ΔΦ _{coup_ref} is equal to or _lower than the set voltage value V _{coup_lim} . It is determined by the field magnetic flux correction value calculation unit 154 whether or not. When the back electromotive voltage V _coup of the rotor winding 30 is larger than the set voltage value V _{coup_lim} (when the determination result of step S206 is NO), the process returns to step S204, and the field magnetic flux of the permanent magnet 33 flowing through the input side rotor 28 is returned. The d-axis current command value correcting unit 158 corrects the d-axis current command value Id _{mg_temp of} the stator winding 20 _again based on the field flux correction value ΔΦ _{coup_ref} so as to further reduce the amount. On the other hand, when the counter electromotive voltage V _coup of the rotor winding 30 is equal to or lower than the set voltage value V _{coup_lim} (when the determination result in step S206 is YES), the process proceeds to step S207.

In step S207, the stator winding current control is performed so that the d-axis current Id _mg and the q-axis current Iq _mg of the stator winding 20 coincide with the d-axis current command value Id _{mg_ref} and the q-axis current command value Iq _{mg_ref} , respectively. Controlled by the unit 160. Thus, the MG torque T _mg is controlled to coincide with the command value T _{mg_ref,} and the field magnetic flux amount of the permanent magnet 33 flowing to the input side rotor 28 is reduced by the correction amount ΔΦ _coup (weakening field control is performed). Thus, the d-axis current Id _mg of the stator winding 20 is controlled.

According to the processing of the flowchart of FIG. 14 described above, the counter electromotive voltage V generated in the rotor winding 30 is generated when the field weakening control for reducing the field magnetic flux amount of the permanent magnet 33 flowing in the input side rotor 28 is executed. The d-axis current Id _mg of the stator winding 20 is controlled by the stator winding current control unit 160 so that the _coup is equal to or less than the set voltage value V _{coup_lim} . By performing field-weakening control by d-axis current control of the stator winding 20, it is possible to obtain the same effect as apparently reducing the magnet amount of the permanent magnet 33. As a result, the back electromotive voltage V _coup of the rotor winding 30 is suppressed to a set voltage value V _{coup_lim} or less (for example, the voltage of the power storage device 42 or less) without actually reducing the magnet amount of the permanent magnet 33, and during EV running Thus, the maximum rotational speed (maximum vehicle speed) of the output-side rotor 18 can be increased.

As described above, according to the present embodiment, when the field control for controlling the field magnetic flux amount of the permanent magnet 33 flowing in the input side rotor 28 is executed, the d-axis current Id _mg of the stator winding 20 is controlled. By doing so, the field control is executed. By executing the field control by the d-axis current control of the stator winding 20, it is possible to obtain the same effect as apparently changing the magnet amount of the permanent magnet 33, and a field for controlling the field magnetic flux. There is no need to add a magnetic winding to the output side rotor 18 separately. As a result, the field control for controlling the field magnetic flux amount of the permanent magnet 33 flowing in the input side rotor 28 can be executed without complicating the configuration of the rotating electrical machine 10.

In the present embodiment, for example, an inverter 41 can be provided as shown in FIG. The inverter 41 can be realized by a known configuration including a switching element and a diode (rectifier element) connected in reverse parallel to the switching element. The inverter 41 converts DC power from the power storage device 42 to AC ( For example, it can be converted into a three-phase alternating current) and supplied to each phase of the rotor winding 30 via the brush 96 and the slip ring 95. 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. 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 the power storage device 42 and the rotor winding 30. The electronic control unit 50 can control 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 can control between the input side rotor 28 and the output side rotor 18. It is possible to control the electromagnetic coupling torque acting on the. At that time, the rotor winding current control unit 153 converts the d-axis current Id _coup and the q-axis current Iq _{coup of} the rotor winding 30 into the d-axis current command value Id _{coup_ref} and the q-axis current command value Iq _{coup_ref} , respectively. The switching operation of the inverter 41 (power conversion in the inverter 41) is controlled so as to match.

As described above, in the present embodiment, the field magnetic flux generated by the common permanent magnet 33 flows to the stator 16 and electromagnetically interacts with the magnetic flux generated by the alternating current of the stator winding 20, and also flows to the input-side rotor 28. And electromagnetically interact with the magnetic flux generated by the alternating current of the rotor winding 30. Therefore, by passing an alternating current (d-axis current) through the rotor winding 30 so that the direction of the magnetic flux due to the alternating current of the rotor winding 30 is the same direction as the direction of the magnetic flux by the permanent magnet 33 (strong field direction). The amount of field magnetic flux generated on the inner peripheral side magnetic pole surface 33a of the permanent magnet 33 and interlinked with the rotor winding 30 is increased, and generated on the outer peripheral side magnetic pole surface 33b of the permanent magnet 33 and connected to the stator winding 20. The amount of field magnetic flux to be increased also increases. On the other hand, by passing an alternating current (d-axis current) through the rotor winding 30 so that the direction of the magnetic flux generated by the alternating current in the rotor winding 30 is opposite to the direction of the magnetic flux generated by the permanent magnet 33 (field weakening direction). The amount of field magnetic flux generated on the inner peripheral side magnetic pole surface 33a of the permanent magnet 33 and interlinked with the rotor winding 30 is reduced, and generated on the outer peripheral side magnetic pole surface 33b of the permanent magnet 33 and connected to the stator winding 20. The amount of field magnetic flux to be reduced also decreases. Therefore, in the present embodiment, the rotor winding current control unit 153 controls the d-axis current Id _coup of the rotor winding 30 so that the field of the permanent magnet 33 that flows to the stator 16 (interlinks with the stator winding 20). It is also possible to execute field control for controlling the amount of magnetic flux.

When executing the strong field control for increasing the field magnetic flux amount of the permanent magnet 33 flowing through the stator 16, the field magnetic flux correction value calculation unit 154 increases the field magnetic flux amount of the permanent magnet 33 flowing through the stator 16. calculating a correction value _ΔΦ coup_ref the field magnetic flux, so that the direction of the magnetic flux by the d-axis current _{Id coup} rotor winding 30 is the same direction as the direction of the magnetic flux by the permanent magnet 33, the magnetic field flux correction value _ΔΦ coup_ref Based on this, the command value Id _{coup_ref} of the d-axis current of the rotor winding 30 is corrected. Then, the rotor winding current control unit 153 _matches the d-axis current Id _coup of the rotor winding 30 with the command value Id _{coup_ref} of the d-axis current corrected based on the field magnetic flux correction value ΔΦ _{coup_ref.} Strong field control is executed by controlling. For example, when the strong field control is executed in a state where the MG torque T _mg acts between the stator 16 and the output side rotor 18, the current I _mg of the stator winding 20 is limited to the allowable current value I _{mg_lim} or less. mG torque _{T mg} is command value under a condition such that (target _{torque) T mg_ref,} it is possible to control the d-axis current _{Id coup} rotor windings 30. By executing the strong field control by the d-axis current control of the rotor winding 30, it is possible to obtain the same effect as when the amount of the permanent magnet 33 is apparently increased. As a result, the current I _mg of the stator winding 20 acts between the stator 16 and the output-side rotor 18 while suppressing the current I _mg of the stator winding 20 to the allowable current value I _{mg_lim} or less without actually increasing the magnet amount of the permanent magnet 33. The maximum value of the MG torque T _mg can be increased.

On the other hand, when the field weakening control for reducing the field flux amount of the permanent magnet 33 flowing through the stator 16 is executed, the field flux correction value calculation unit 154 reduces the field flux amount of the permanent magnet 33 flowing through the stator 16. Thus, the field magnetic flux correction value ΔΦ _{coup_ref} is calculated, and the magnetic field magnetic flux correction value is set so that the direction of the magnetic flux by the d-axis current Id _coup of the rotor winding 30 is opposite to the direction of the magnetic flux by the permanent magnet 33. Based on ΔΦ _{coup_ref} , the command value Id _{coup_ref for} the d-axis current of the rotor winding 30 is corrected. Then, the rotor winding current control unit 153 _matches the d-axis current Id _coup of the rotor winding 30 with the command value Id _{coup_ref} of the d-axis current corrected based on the field magnetic flux correction value ΔΦ _{coup_ref.} The field weakening control is executed by controlling. For example, it is possible to counter electromotive voltage _{V mg} generated in the stator winding 20 is to be equal to or less than the set voltage value _{V Mg_lim,} controls the d-axis current _{Id coup} rotor windings 30. By executing the field weakening control by the d-axis current control of the rotor winding 30, it is possible to obtain the same effect as apparently reducing the magnet amount of the permanent magnet 33. As a result, the counter electromotive voltage V _mg of the stator winding 20 can be suppressed to the set voltage value V _{mg_lim} or less (for example, the voltage of the power storage device 42 or less) without actually reducing the magnet amount of the permanent magnet 33.

  Next, another configuration example of the output side rotor 18 will be described.

  In the configuration example shown in FIG. 16, each permanent magnet 33 is mounted in a groove formed on the inner peripheral surface of the rotor core 53 (the surface facing the input-side rotor 28) compared to the configuration examples shown in FIGS. Has been. In this case, the rotor core 53 is also located between the permanent magnets 33 adjacent in the circumferential direction. According to this configuration example, the affixing strength of the permanent magnet 33 can be improved with respect to the attracting force to the input side rotor 28 and the force in the rotor rotation direction.

  In the configuration example shown in FIG. 17, each permanent magnet 33 mounted in the groove on the inner peripheral surface of the rotor core 53 is square, compared to the configuration example shown in FIG. 16, and the inner peripheral magnetic pole surface 33 a. The outer peripheral magnetic pole surface 33b is a flat surface. Also in this configuration example, it is possible to improve the affixing strength of the permanent magnet 33 with respect to the attracting force to the input side rotor 28 and the force in the rotor rotation direction. Furthermore, according to this configuration example, the cost of the permanent magnet 33 can be reduced.

  In the configuration example shown in FIG. 18, compared to the configuration examples shown in FIGS. 3 and 4, the plurality of permanent magnets 33 are interposed via the input-side rotor 28 (rotor teeth 52 a) and a thin rotor core (iron core) layer 53 f. Are arranged along the circumferential direction. Also in this configuration example, it is possible to improve the affixing strength of the permanent magnet 33 with respect to the attracting force to the input side rotor 28 and the force in the rotor rotation direction.

  In the present embodiment, the input shaft 34 and the output shaft 24 of the rotating electrical machine 10 can be interchanged, the second rotor 18 is mechanically connected to the input shaft 34, and the first rotor 28 is mechanically connected to the output shaft 24. It can also be linked. That is, the second rotor 18 may be mechanically connected to the engine 36 and the first rotor 28 may be mechanically connected to the wheels 38 via the transmission 44. In this case, the power from the engine 36 is transmitted to the second rotor 18 connected to the input shaft 34, and the power from the first rotor 28 connected to the output shaft 24 is shifted by the transmission 44 to the wheels 38. Therefore, the second rotor 18 becomes an input side rotor, and the first rotor 28 becomes an output side rotor.

  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 machine, 16 Stator, 18 2nd rotor (output side rotor), 20 Stator winding, 24 Output shaft, 28 1st rotor (input side rotor), 30 Rotor winding, 33 Permanent magnet, 34 Input shaft, 36 Engine, 38 wheels, 40, 41 inverter, 42 power storage device, 44 transmission, 48 clutch, 50 electronic control unit, 93 rectifier, 94 boost converter (DC-DC converter), 95 slip ring, 96 brush, 151 coupling torque Command value calculation unit, 152 Rotor winding current command value calculation unit, 153 Rotor winding current control unit, 154 Field magnetic flux correction value calculation unit, 155 MG torque command value calculation unit, 156 d-axis current command value calculation unit, 157 q-axis current command value calculation unit, 158 d-axis current command value correction unit, 159 q-axis current command value correction unit , 160 Stator winding current control unit.

Claims (5)

A first rotor provided with a rotor winding;
A stator provided with a stator winding;
A second rotor that is opposed to the first rotor and the stator and is rotatable relative to the first rotor is provided with a magnet that generates a field magnetic flux that flows through the first rotor and the stator. A second rotor,
With
Due to the interaction between the alternating current flowing through the rotor winding and the field magnetic flux of the magnet flowing through the first rotor, a torque acts between the first rotor and the second rotor,
A drive control device for a rotating electrical machine in which a torque acts between a stator and a second rotor by an interaction between an alternating current flowing in a stator winding and a field magnetic flux of a magnet flowing in the stator,
A rotor winding current control unit for controlling an alternating current flowing in the rotor winding;
A stator winding current control unit for controlling an alternating current flowing in the stator winding;
With
When performing field control for controlling the field magnetic flux of the magnet flowing in the first rotor, the stator winding current control unit executes the field control by controlling the d-axis current of the stator winding. Electric drive control device. A drive control device for a rotating electrical machine according to claim 1,
When the stator winding current control unit executes the field control in a state where torque acts between the first rotor and the second rotor, the alternating current flowing through the rotor winding is less than the allowable current. A drive control device for a rotating electrical machine that controls a d-axis current of a stator winding so that a torque acting between a first rotor and a second rotor becomes a target torque under restricted conditions. A drive control device for a rotating electrical machine according to claim 1 or 2,
The stator winding current control unit, when executing the field control, controls the d-axis current of the stator winding so that the counter electromotive voltage generated in the rotor winding is equal to or lower than a set voltage. Drive control device. It is a drive control apparatus of the rotary electric machine of any one of Claims 1-3,
A rectifier capable of rectifying AC power generated in the rotor winding; and
A DC-DC converter capable of converting the DC power rectified by the rectifier into a voltage;
An inverter capable of converting the direct current power converted by the DC-DC converter into alternating current and supplying it to the stator winding;
With
The rotor winding current control unit controls the AC current flowing in the rotor winding by controlling the voltage conversion in the DC-DC converter,
The stator winding current control unit is a drive control device for a rotating electrical machine that controls an alternating current flowing in the stator winding by controlling power conversion in an inverter. A first rotor provided with a rotor winding;
A stator provided with a stator winding;
A second rotor that is opposed to the first rotor and the stator and is rotatable relative to the first rotor is provided with a magnet that generates a field magnetic flux that flows through the first rotor and the stator. A second rotor,
With
Due to the interaction between the alternating current flowing through the rotor winding and the field magnetic flux of the magnet flowing through the first rotor, a torque acts between the first rotor and the second rotor,
A drive control device for a rotating electrical machine in which a torque acts between a stator and a second rotor by an interaction between an alternating current flowing in a stator winding and a field magnetic flux of a magnet flowing in the stator,
A rotor winding current control unit for controlling an alternating current flowing in the rotor winding;
A stator winding current control unit for controlling an alternating current flowing in the stator winding;
With
When performing field control for controlling the field magnetic flux of the magnet flowing through the stator, the rotor winding current control unit executes the field control by controlling the d-axis current of the rotor winding. Drive control device.

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