JP2011062061A - Rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of transmitting power, by utilizing electromagnetic coupling of rotors oppositely disposed in a radial direction, wherein the rotors disposed inside of the diameter direction can be cooled efficiently. <P>SOLUTION: An oil reservoir member 85, which corotates with an input shaft 34 and an input-side rotor 28 and reserves an oil 87 is installed on the inner circumference of the input-side rotor 28. An oil discharge port 92 for discharging oil to the oil reservoir member 85 is formed on the input shaft 34. Oil-flowing paths 90-1 and 90-2 are formed between coil end portions 130-1, 130-2 of the rotor winding 30 and output-side rotor support members 83, 84. At the rotation of the input side rotor 28, the oil 87 reserved in the oil reservoir member 85 splashes due to the centrifugal force from both ends 85a, 85b of the rotating shaft direction to the coil end portions 130-1, 130-2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine, and more particularly, to a rotating electrical machine capable of performing power transmission using electromagnetic coupling between rotors.

  The related art of a power transmission device provided with this type of rotating electrical machine is disclosed in Patent Document 1 below. The power transmission device according to Patent Document 1 is provided with a first rotor mechanically connected to an engine via an input shaft, and a magnet electromagnetically coupled to the winding of the first rotor. A second rotor mechanically coupled to the drive wheel; a stator having a winding electromagnetically coupled to the magnet of the second rotor; and 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 controls power transfer between the battery and the stator winding, 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. The first rotor is disposed on the outer peripheral side of the input shaft, the second rotor is disposed on the outer peripheral side of the first rotor, and the stator is disposed on the outer peripheral side of the second rotor. 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 wheel can be driven. Furthermore, since it is possible to transfer power 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. In addition, the electromagnetic coupling between the stator winding and the magnet of the second rotor causes the second rotor to generate power using the power supplied from the battery side to the stator winding via the first inverter. Therefore, the torque transmitted to the drive wheels can be controlled by controlling the power supply to the stator windings by the first inverter.

Japanese Patent No. 3543500 JP 2009-73472 A

  In Patent Document 1, in order to drive the driving wheel by the power of the engine, a current is always passed through the winding of the first rotor via the slip ring and the brush, so that the first rotor and the second rotor are interposed. It is necessary to always apply torque. In this case, since the first rotor generates heat when a current flows through the winding of the first rotor, it is desirable to cool the winding of the first rotor. However, since the first rotor is located in the innermost layer (innermost radial direction), when supplying coolant such as oil from the outer peripheral side to the rotating winding of the first rotor, the first rotor is centrifuged radially outward. Due to the force, the coolant is less likely to be supplied to the windings of the first rotor. In that case, it is difficult to efficiently cool the first rotor located in the innermost layer.

  An object of the present invention is to efficiently cool a rotor arranged radially inward in a rotating electrical machine capable of performing power transmission using electromagnetic coupling between rotors arranged opposite to each other in a radial direction. And

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

  A rotating electrical machine according to the present invention is a first rotor that is arranged on the outer peripheral side of a rotating shaft and rotates together with the rotating shaft, and a rotor winding capable of generating a rotating magnetic field when an alternating current flows is a rotor core. A first rotor wound around the first rotor and a second rotor disposed on the outer peripheral side of the first rotor and capable of rotating relative to the first rotor, wherein a rotating magnetic field generated in the rotor winding is A rotary electric machine including a second rotor in which torque acts between the first rotor and the first rotor together with a rotary shaft and a first rotor. A working liquid storage member for rotating and storing the working liquid in the working liquid reservoir is installed, and a working liquid discharge port for discharging the working liquid to the working liquid reservoir is formed on the rotating shaft, and the rotor winding Both ends of the rotating shaft in the direction of the rotating shaft from the rotor core and the working liquid storage member When the first rotor rotates, the working liquid stored in the working liquid reservoir is moved from the both ends of the working liquid storage member in the direction of the rotation axis by the centrifugal force to both ends of the rotor winding in the direction of the rotation axis. The gist is to scatter.

  In one aspect of the present invention, a passage forming member for forming a working liquid passage between the both ends of the rotor winding in the rotation axis direction is installed in proximity to both ends of the rotor winding in the rotation axis direction. It is preferable that

  In one aspect of the present invention, the passage forming member is preferably a member that rotates together with the second rotor.

  In one aspect of the present invention, the passage forming member is preferably a member that forms a working liquid passage between both end surfaces of the second rotor in the rotation axis direction.

  In one aspect of the present invention, the stator further includes a stator that is disposed on the outer peripheral side of the second rotor and has a stator winding wound around the stator core that can generate a rotating magnetic field when an alternating current flows. In the two-rotor, torque acts between the stator and the stator in response to the rotating magnetic field generated in the stator winding. The working fluid supply port for supplying the working liquid passing through the working fluid passage to both ends of the stator winding in the rotation axis direction by centrifugal force is formed on the passage forming member. Is preferred.

  In one aspect of the present invention, the working liquid reservoir member is formed with a working liquid outlet for ejecting the working liquid stored in the working liquid reservoir when the first rotor rotates. Is preferred.

  In one aspect of the present invention, the rotating shaft and the working liquid reservoir member are connected via a connecting member, and the working liquid reservoir is formed by sandwiching the connecting member between both ends in the rotating shaft direction of the working liquid reservoir member. It is preferable that a working fluid communication hole for communicating working fluid reservoirs formed with the coupling member interposed therebetween is formed.

  In one aspect of the present invention, it is preferable that a working liquid introduction passage for introducing the working liquid from the working liquid discharge port into the gap between the first rotor and the second rotor is formed.

  In one aspect of the present invention, it is preferable that the working liquid introduction passage is formed in the rotor core of the first rotor and introduces the working liquid stored in the working liquid reservoir into the gap.

  In one aspect of the present invention, the rotating shaft and the working liquid reservoir member are connected via a connecting member, and the working liquid reservoir is formed by sandwiching the connecting member between both ends of the working liquid reservoir member in the rotating shaft direction. It is preferable that the introduction passage is formed so as to face the outer peripheral portion of the connecting member and project from the outer peripheral portion of the connecting member to both sides in the rotation axis direction so as to communicate with the working liquid reservoir.

  In one aspect of the present invention, it is preferable that the rotating shaft and the working liquid reservoir member are connected via a connecting member, and the working liquid introduction passage is also formed in the connecting member and communicates with the working liquid discharge port. .

  In one aspect of the present invention, the working liquid introduction passage is formed between the rotor core of the first rotor and both ends of the rotor winding in the rotation axis direction, and stores the working liquid stored in the working liquid reservoir. It is preferable to introduce into the gap.

  According to the present invention, at the time of rotation of the first rotor, it is operated at both ends in the rotation axis direction of the rotor winding of the first rotor which is arranged radially inward and is subjected to centrifugal force radially outward. The liquid can be supplied uniformly and efficiently from the working liquid storage member. Therefore, it is possible to efficiently cool the first rotor to which the working liquid is difficult to be supplied.

1 is a diagram illustrating a schematic configuration of a hybrid drive device including a rotary electric machine 10 according to an embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present 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. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present invention. 1 is a diagram illustrating a schematic configuration of a rotating electrical machine 10 according to an embodiment of the present invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 which concerns on embodiment of this invention. It is a figure which shows the other schematic structure of the rotary electric machine 10 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.

  1-3 is a figure which shows the outline of a structure of a hybrid drive device provided with the rotary electric machine 10 which concerns on embodiment of this invention, FIG. 1 shows the outline of the whole structure, FIG. The outline of a structure is shown. The hybrid drive device 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 wheels 38, and the gear ratio is changed. A possible transmission (mechanical transmission) 44 and the rotating electrical machine 10 provided between the engine 36 and the transmission 44 are provided. 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, a first rotor 28 that can rotate relative to the stator 16, and a predetermined gap between the stator 16 and the first rotor 28 in a radial direction orthogonal to the rotor rotation axis. And a second rotor 18 which is opposed to each other and is rotatable relative to the stator 16 and the first rotor 28. The stator 16 is disposed at a position radially outside the first rotor 28 with a space 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 of the second rotor 18. Has been. The first rotor 28 is mechanically coupled to the input shaft 34 (first rotational shaft) of the rotating electrical machine 10, and the input shaft 34 is mechanically coupled to the engine 36, whereby the input shaft 34 (first rotor 28). ) Receives power from the engine 36. On the other hand, the second rotor 18 is mechanically coupled to the output shaft 24 (second rotational shaft) of the rotating electrical machine 10, and the output shaft 24 is mechanically coupled to the wheel 38 via the transmission 44. Thus, the power from the output shaft 24 (second rotor 18) is transmitted to the wheels 38 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 input-side rotor 28 includes a rotor core (first rotor core) 52 and a plurality of (for example, three-phase) rotor windings 30 disposed on the rotor core 52 along the circumferential direction thereof. When a plurality of phases (for example, three phases) of alternating current flows through the plurality of phases of the rotor winding 30, the rotor winding 30 can generate a rotating magnetic field that rotates in the rotor circumferential direction.

  The stator 16 includes a stator core (stator core) 51 and a plurality of (for example, three-phase) stator windings 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 phases of the stator winding 20, the stator winding 20 can generate a rotating magnetic field that rotates in the circumferential direction of the stator.

  The output-side rotor 18 includes a rotor core (second rotor core) 53 and permanent magnets 32 and 33 that are disposed on the rotor core 53 along the circumferential direction thereof and generate field magnetic flux. The permanent magnet 32 is disposed on the outer peripheral portion of the rotor core 53 so as to face the stator 16 (stator core 51), and the permanent magnet 33 is opposed to the input-side rotor 28 (rotor core 52) on the inner peripheral portion of the rotor core 53. Arranged. Here, the permanent magnets 32 and 33 can also be integrated.

  A more detailed configuration example of the input side rotor 28, the output side rotor 18, and the stator 16 is shown in FIG. In the example shown in FIG. 4, the input side rotor 28, the output side rotor 18, and the stator 16 are arranged concentrically. In the stator core 51 of the stator 16, a plurality of teeth 51 a protruding radially inward (toward the output-side rotor 18) are arranged at intervals along the circumferential direction of the stator. The magnetic pole is configured by being wound around the teeth 51a. A plurality of teeth 52a protruding radially outward (toward the output-side rotor 18) are arranged on the rotor core 52 of the input-side rotor 28 at intervals along the circumferential direction of the rotor. Is wound around these teeth 52a, thereby forming a magnetic pole. The teeth 51a of the stator 16 and the permanent magnets 32 of the output-side rotor 18 are opposed to each other in the radial direction perpendicular to the rotation center axis of the output-side rotor 18 (which coincides with the rotation center axis of the input-side rotor 28). The teeth 52a of the side rotor 28 and the permanent magnets 33 of the output side rotor 18 are arranged to face each other in the radial direction. The winding axis of the stator winding 20 and the winding axis of the rotor winding 30 coincide with this radial direction (the direction in which the input side rotor 28 and the output side rotor 18 face each other). The permanent magnets 32 and 33 are arranged at intervals in the circumferential direction of the rotor, and the permanent magnet 32 is embedded in the rotor core 53 in a V shape. However, the permanent magnets 32 and 33 may be exposed on the surface (outer peripheral surface or inner peripheral surface) of the output-side rotor 18 or may be embedded in the output-side rotor 18 (in the rotor core 53). .

  The clutch 48 is provided in parallel with the rotating electrical machine 10 (the input-side rotor 28 and the output-side rotor 18) between the engine 36 and the transmission 44. The clutch 48 is engaged / released between a clutch plate 48a mechanically connected to the engine 36 (input side rotor 28) and a clutch plate 48b mechanically connected to the transmission 44 (output side rotor 18). The mechanical engagement / release of the input side rotor 28 and the output side rotor 18 can be selectively performed, and power transmission can be selectively permitted / cut off. By engaging the clutch plate 48a and the clutch plate 48b and mechanically engaging the input side rotor 28 and the output side rotor 18, the engine 36 and the transmission 44 (wheels 38) via the clutch 48 are connected. Power transmission between is allowed. When the clutch 48 is engaged, 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 plate 48a and the clutch plate 48b and releasing the mechanical engagement between the input side rotor 28 and the output side rotor 18, the engine 36 and the transmission 44 (wheels 38) via the clutch 48 are released. ) Is interrupted. When the clutch 48 is released, a difference in rotational speed between the input side rotor 28 and the output side rotor 18 is allowed. The clutch 48 here can switch the engagement / release of the clutch plate 48a and the clutch plate 48b using, for example, hydraulic pressure or electromagnetic force, and further, the hydraulic pressure or electromagnetic force supplied to the clutch 48 can be changed. By adjusting, the fastening force between the clutch plate 48a and the clutch plate 48b can also be adjusted. By adjusting the fastening force between the clutch plate 48a and the clutch plate 48b, the engine 36 and the transmission 44 (wheel 38) via the clutch 48 are allowed while allowing a difference in rotational speed between the clutch plate 48a and the clutch plate 48b. It is possible to allow power transmission between the two.

  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 chargeable / dischargeable power storage device 42 provided as a direct current power source can be constituted by, for example, a secondary battery and stores electrical energy. The inverter 40 includes a switching element (not shown), and converts DC power from the power storage device 42 into alternating current (for example, three-phase alternating current) by switching operation of the switching element, and converts each phase of the stator winding 20 to each phase. It is possible to supply. 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.

  The rectifier 93 is electrically connected to the brush 96 and rectifies AC power from the rotor winding 30 taken out by the slip ring 95 and the brush 96 and converts it into DC. The step-up converter (DC-DC converter) 94 includes a switching element, and boosts (voltage converts) DC power rectified by the rectifier 93 by the switching operation of the switching element and outputs it. 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. In other words, 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. It is also possible to collect the DC power boosted by boost converter 94 in power storage device 42. Here, the rectifier 93 performs power conversion in only one direction from the slip ring 95 side to the boost converter 94 side, and the boost converter 94 is unidirectional from the rectifier 93 side to the power storage device 42 side (or the inverter 40 side). Only perform power conversion. Therefore, rectifier 93 and boost converter 94 perform power conversion in only one direction from slip ring 95 side to power storage device 42 side (or inverter 40 side).

  The inverter 41 is electrically connected to the brush 96 and is provided in parallel with the rectifier 93 and the boost converter 94. The inverter 41 includes a switching element (not shown), converts DC power from the power storage device 42 to AC (for example, three-phase AC) by the switching operation of the switching element, and passes through the brush 96 and the slip ring 95. And can be supplied to each phase of the rotor winding 30.

  The electronic control unit 50 controls the alternating current flowing through each phase of the stator winding 20 by controlling the switching operation of the switching element of the inverter 40. The electronic control unit 50 controls the boost ratio (voltage conversion ratio) in the boost converter 94 by controlling the duty ratio when the switching element of the boost converter 94 is switched. The alternating current flowing in each phase is controlled. Further, the electronic control unit 50 can also 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. 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.

  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. The torque (magnet torque) can be applied to the output-side rotor 18 by electromagnetic interaction (attraction and repulsion) between the rotating magnetic field generated in the stator winding 20 and the field magnetic flux generated in the permanent magnet 32. The output side rotor 18 can be rotationally driven. 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 32 of the output side rotor 18 are electromagnetically coupled, so that the rotating magnetic field generated in the stator winding 20 is applied to the output side rotor 18. A torque (magnet torque) can be applied between the stator 16 and the output-side rotor 18. Further, for example, as shown in FIG. 4, an example in which a magnetic material (ferromagnetic material) is disposed between the permanent magnets 32 as salient pole portions facing the stator 16 (tooth 51a), or the permanent magnet 32 is on the output side. In the example embedded in the rotor 18 (in the rotor core 53), the reluctance torque in addition to the magnet torque is also applied to the stator 16 and the output side rotor in response to the rotating magnetic field generated by the stator 16 acting on the output side rotor 18. 18 to act. The inverter 40 can perform bidirectional power conversion, and the power storage device 42 can transmit and receive power to and from the stator winding 20.

  Further, as the input side rotor 28 rotates relative to the output side rotor 18, a rotation difference is generated between the input side rotor 28 (rotor winding 30) and the output side rotor 18 (permanent magnet 33). An induced electromotive force is generated in the winding 30, and an induced current (alternating current) flows in the rotor winding 30 due to the induced electromotive force, thereby generating a rotating magnetic field. The torque can be applied to the output-side rotor 18 by the electromagnetic interaction between the rotating magnetic field generated by the induced current of the rotor winding 30 and the field flux of the permanent magnet 33, and the output-side rotor 18 is driven to rotate. Can do. 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. Accordingly, 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 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 determines that the output voltage of the boost converter 94 is the power storage device. The step-up ratio in the step-up converter 94 is controlled so as to be higher than the voltage 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, so that torque acts between the input-side rotor 28 and the output-side rotor 18. 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 without performing the switching operation of the inverter 40. 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 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 Torque stops working with the rotor 18.

  In addition, when a plurality of phases (for example, three phases) of alternating current flows through the plurality of phases of the rotor winding 30 by the switching operation of the inverter 41, the rotor winding 30 generates a rotating magnetic field that rotates in the circumferential direction of the rotor. The torque (magnet torque) can be applied to the input-side rotor 28 by electromagnetic interaction (attraction and repulsion) between the rotating magnetic field generated in the rotor winding 30 and the field magnetic flux generated in the permanent magnet 33. The input side rotor 28 can be rotationally driven. On the other hand, by maintaining the switching element of the inverter 41 in the OFF state and stopping the switching operation, no AC current flows through the rotor winding 30, and torque acts between the input side rotor 28 and the output side rotor 18. Disappear. Thus, a drive circuit for allowing or preventing an alternating current from flowing through the rotor winding 30 can be configured including the rectifier 93, the boost converter 94, and the inverter 41.

  Next, the operation of the hybrid drive device according to this embodiment will be described.

  When the engine 36 generates power, the power of the engine 36 is transmitted to the input side rotor 28, and the input side rotor 28 is rotationally driven together with the input shaft 34 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 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 this, and torque in the engine rotation direction acts on the output-side rotor 18 due to electromagnetic interaction between this induced current and the field flux of the permanent magnet 33, so that the output-side rotor 18 and the output shaft 24 together with the engine Drives in the rotational 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 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 flux of the permanent magnet 32 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 boost converter 94 in power storage device 42. Note that when the switching operation of the boost converter 94 is performed, the switching operation of the inverter 41 is not performed.

  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 32 and recovered in the power storage device 42.

  Further, by engaging the clutch 48 and mechanically connecting the input side rotor 28 and the output side rotor 18, an alternating current does not flow through the rotor winding 30, and the input side rotor 28 and the output side rotor 18 are not connected. Even if no torque acts on the vehicle, the power from the engine 36 can be transmitted to the wheel 38 via the clutch 48, and the vehicle can be driven in the forward direction using the power of the engine 36. As described above, in the present embodiment, the first power transmission capable of transmitting the power from the engine 36 to the wheels 38 by the torque acting between the input side rotor 28 and the output side rotor 18 of the rotating electrical machine 10. In addition to the path, a second power transmission path capable of transmitting power from the engine 36 to the wheels 38 via a clutch 48 provided in parallel to the rotating electrical machine 10 is provided. The transmission 44 can shift the power from either the first power transmission path or the second power transmission path and transmit it to the wheels 38.

  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 32, 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.

  Further, when starting the engine 36, the electronic control unit 50 converts the DC power from the power storage device 42 into AC by the inverter 41 and supplies it to the rotor winding 30 via the slip ring 95 and the brush 96. By controlling the switching operation of the inverter 41, the engine 36 can be cranked using the power supplied to the rotor winding 30. In this way, AC power for starting the engine 36 is supplied to the rotor winding 30. The inverter 41 here performs power conversion in only one direction from the power storage device 42 side to the slip ring 95 side (rotor winding 30 side). During cranking of the engine 36, torque is applied to the input-side rotor 28 connected to the engine 36 by electromagnetic interaction between the rotating magnetic field of the input-side rotor 28 and the field flux of the permanent magnet 33 of the output-side rotor 18. The output side rotor 18 also receives the reaction torque. Therefore, when starting the engine 36 during EV traveling, the switching operation of the inverter 40 is controlled so that electric power is supplied from the power storage device 42 to the stator winding 20 and the torque that cancels the reaction torque is applied to the output-side rotor 18. As a result, the output-side rotor 18 can be rotationally driven using the power supplied to the stator winding 20. Note that when the switching operation of the inverter 41 is performed, the switching operation of the boost converter 94 is not performed.

  In the present embodiment, when the power of the engine 36 is transmitted to the wheels 38 by the torque acting between the input side rotor 28 and the output side rotor 18 (via the first power transmission path), the rotor windings are used. Since the input side rotor 28 generates heat when an alternating current flows through the rotor 30, it is desirable to cool the rotor winding 30 of the input side rotor 28. Hereinafter, a configuration example for cooling the rotor winding 30 of the input side rotor 28 will be described with reference to FIGS.

  The input-side rotor 28 is disposed at a position radially outward from the input shaft 34 (outer peripheral side of the input shaft 34) with a space from the input shaft 34. The input-side rotor 28 (rotor core 52) and the input shaft 34 are substantially the same. It is mechanically connected via a disk-shaped connecting member 81. Since the thickness of the connecting member 81 (the length of the input shaft 34 in the axial direction) is thinner than the thickness of the input side rotor 28 (rotor core 52), there is a gap between the input shaft 34 and the input side rotor 28 (rotor core 52). A space is formed. The connecting member 81 and the clutch plate 48 a of the clutch 48 are mechanically connected via the connecting member 82. The connecting member 82 is provided over the entire circumference of the input side rotor 28 and rotates together with the input side rotor 28. The input shaft 34 (input side rotor 28) is rotatably supported by the casing 15 via a bearing 61.

  The output-side rotor 18 is disposed opposite to the input-side rotor 28 at a position radially outward from the input-side rotor 28 (outer peripheral side of the input-side rotor 28) with a minute gap therebetween, and the output-side rotor 18 (rotor core 53). The output shaft 24 is mechanically connected via an output side rotor support member 83. The clutch plate 48 b of the clutch 48 is mechanically connected to the output side rotor support member 83. An output side rotor support member 84 mechanically connected to the output side rotor 18 and the output shaft 24 are rotatably supported by the casing 15 via bearings 62 and 63, so that the output side rotor 18 can rotate freely. It is supported. The output side rotor support members 83 and 84 are provided over the entire circumference of the output side rotor 18 and rotate together with the output side rotor 18. The stator 16 is disposed opposite to the output-side rotor 18 at a position radially outward from the output-side rotor 18 (on the outer peripheral side of the output-side rotor 18) with a minute gap, and is provided on the outer peripheral side of the stator 16. 15 is fixed.

  An oil storage member 85 for storing oil 87 as a working liquid (cooling liquid) is installed on the inner periphery of the input side rotor 28. The oil reservoir member 85 is provided over the entire circumference of the input side rotor 28 between the input side rotor 28 and the connecting member 81, and is mechanically connected to the input shaft 34 via the connecting member 81. . The oil storage member 85 is attached to the inner peripheral surface of the rotor core 52 and rotates together with the input shaft 34 and the input side rotor 28. The oil 87 is stored in spaces (oil reservoirs) 85e and 85f formed by sandwiching the connecting member 81 between both end portions 85a and 85b of the oil reservoir member 85 in the rotation axis direction (the axial direction of the input shaft 34). A plurality of oil outlets 85c and 85d for ejecting oil 87 stored in the oil reservoirs 85e and 85f of the oil reservoir member 85 are formed at both ends 85a and 85b of the oil reservoir member 85 in the rotation axis direction, respectively. ing. As shown in FIGS. 8 and 9, both ends 85a and 85b in the rotational axis direction of the oil storage member 85 are ring-shaped, and the oil outlets 85c and 85d are constituted by through holes extending along the rotational axis direction. They are arranged at regular intervals (equal intervals) in the circumferential direction of the side rotor 28. A plurality of oil holes 88 are formed in the outer peripheral portion of the connecting member 81 for communicating the oil reservoirs 85e and 85f formed with the connecting member 81 interposed therebetween. As shown in FIG. 7, the oil holes 88 are arranged at regular intervals (equal intervals) in the circumferential direction of the input-side rotor 28. The oil hole 88 is preferably arranged on the outer peripheral side as much as possible, and is preferably arranged on the outer side in the radial direction than the oil jet outlets 85c and 85d. The input shaft 34 is formed with an oil passage 91 to which oil is supplied from the outside, and a plurality of oil discharge ports 92 for discharging the oil to the oil reservoir 85f of the oil storage member 85. The rotor winding 30 is wound around the rotor core 52 with its coil end portions (both ends in the rotation axis direction) 130-1 and 130-2 projecting from the rotor core 52 and the oil storage member 85 to both sides in the rotation axis direction. Yes.

  The connecting member 82 is disposed close to the side surface (one end surface in the rotation axis direction) 130-1a of the coil end portion 130-1 with a minute gap therebetween, and the output-side rotor support member 83 is the outer peripheral surface 130- of the coil end portion 130-1. 1b and the close arrangement with a minute gap between the connecting member 82 and the side surface 130-1a of the coil end portion 130-1, and the outer periphery of the output side rotor support member 83 and the coil end portion 130-1. An oil passage 90-1 is formed between the surface 130-1b. The output-side rotor support member 84 is disposed close to the side surface (the other end surface in the rotation axis direction) 130-2a and the outer peripheral surface 130-2b of the coil end portion 130-2 with a small gap therebetween, so that the output-side rotor An oil passage 90-2 is formed between the support member 84 and the side surface 130-2a and the outer peripheral surface 130-2b of the coil end portion 130-2. The oil passages 90-1 and 90-2 are formed over the entire circumference of the input-side rotor 28, and the connecting member 82 and the output are provided so that the passage widths of the oil passages 90-1 and 90-2 are uniform. The shape of the side rotor support member 84 is preferably designed in accordance with the shape of the side surfaces 130-1a and 130-2a of the coil end portions 130-1 and 130-2.

  Further, the oil passage 90-1 is also formed between the output-side rotor support member 83 and the side surface (one end surface in the rotation axis direction) 18a of the output-side rotor 18, and the oil passage 90-2 is formed between the output-side rotor and the output-side rotor. It is also formed between the support member 84 and the side surface (the other end surface in the rotation axis direction) 18b of the output side rotor 18. The stator winding 20 is wound around the stator core 51 with its coil end portions (both ends in the rotation axis direction) 120-1 and 120-2 projecting from the stator core 51 to both sides in the rotation axis direction. The output-side rotor support member 83 is formed with a plurality of oil supply ports 83a for supplying oil to the coil end portion 120-1 of the stator winding 20, and the output-side rotor support member 84 is supplied with oil. A plurality of oil supply ports 84a for supplying to the coil end portion 120-2 of the stator winding 20 are formed. As shown in FIGS. 10 and 11, the oil supply ports 83 a and 84 a are arranged at regular intervals (equal intervals) in the circumferential direction of the output-side rotor 18. In the oil passages 90-1 and 90-2 formed between the output-side rotor support members 83 and 84 and the side surfaces 18 a and 18 b of the output-side rotor 18, the outer peripheral side ends halfway and the output-side rotor support member 83 and 84 are in contact with the side surfaces 18a and 18b of the output-side rotor 18, and the inner peripheral side is connected all around. Furthermore, the oil passages 90-1 and 90-2 have different radial lengths due to different outer diameters (outermost circumferential positions) depending on the circumferential direction. Oil supply ports 83a and 84a are disposed at portions where the outer diameters of the oil passages 90-1 and 90-2 are large, and bolts 64 and 65 are disposed at portions where the outer diameters of the oil passages 90-1 and 90-2 are small, The output side rotor support members 83 and 84 and the output side rotor 18 are fastened by bolts 64 and 65.

  When the input shaft 34 and the input side rotor 28 are rotated, the oil supplied to the oil passage 91 inside the input shaft 34 is discharged from the oil discharge port 92 by centrifugal force as shown by an arrow a in FIG. The oil is stored in the oil reservoirs 85e and 85f of the member 85. The rotor core 52 can be cooled by the oil 87 stored in the oil reservoirs 85e and 85f. Further, the oil 87 stored in the oil reservoirs 85e and 85f is ejected from the oil outlets 85c and 85d at both ends 85a and 85b in the rotational axis direction by centrifugal force as shown by the arrow b in FIG. The 30 coil end portions 130-1 and 130-2 are evenly scattered and contacted with the inner peripheral surfaces 130-1c and 130-2c. The oil that has contacted the inner peripheral surfaces 130-1c and 130-2c of the coil end portions 130-1 and 130-2 is connected to the connecting member 82 and the coil end portion 130-1 by centrifugal force as shown by an arrow c in FIG. The coil end is passed through the oil passage 90-1 between the side surface 130-1a and the oil passage 90-2 between the output-side rotor support member 84 and the side surface 130-2a of the coil end portion 130-2. It contacts the side surfaces 130-1a and 130-2a of the portions 130-1 and 130-2 uniformly and with a flow velocity. Further, the oil is caused by centrifugal force between an oil passage 90-1 between the output-side rotor support member 83 and the outer peripheral surface 130-1b of the coil end portion 130-1, and the output-side rotor support member 84 and the coil end portion 130-. 2 through the oil passage 90-2 between the outer peripheral surface 130-2b and the outer peripheral surfaces 130-1b and 130-2b of the coil end portions 130-1 and 130-2 uniformly and with a flow velocity. To do. Thereby, the coil end portions 130-1 and 130-2 of the rotor winding 30 can be cooled, and the input-side rotor 28 located in the innermost layer (innermost radial direction) can be cooled.

  Further, the oil used for cooling the coil end portions 130-1 and 130-2 of the rotor winding 30 is subjected to centrifugal force by the output side rotor support member 83 and the output side rotor 18 as shown by an arrow d in FIG. 5. The oil passage 90-1 between the output side rotor 18 and the oil passage 90-2 between the output side rotor support member 84 and the side surface 18b of the output side rotor 18 are passed through the side surface (rotation of the output side rotor 18). (Axial direction end faces) 18a and 18b. Thereby, the permanent magnets 32 and 33 of the output side rotor 18 located in the intermediate layer can be cooled.

  Further, the oil used for cooling the permanent magnets 32 and 33 of the output side rotor 18 is ejected from the oil supply ports 83a and 84a by centrifugal force as shown by the arrow d in FIG. The end portions 120-1 and 120-2 are uniformly scattered and come into contact with the inner peripheral surfaces 120-1a and 120-2a. As a result, the coil end portions 120-1 and 120-2 of the stator winding 20 can be cooled, and the stator 16 located on the outermost layer (outermost in the radial direction) can be cooled. The oil used for cooling the coil end portions 120-1 and 120-2 of the stator winding 20 returns to the oil pan, performs heat exchange, and is then supplied to the oil passage 91 inside the input shaft 34 again.

  In the present embodiment described above, torque is applied between the input-side rotor 28 and the output-side rotor 18 by the alternating current of the rotor winding 30, and the input-side rotor 28 and the output-side rotor 18 are rotating. The oil storage member 85 supplies cooling oil to the rotor windings 30 (coil end portions 130-1 and 130-2) of the input-side rotor 28, which is located in the innermost layer and is subjected to a centrifugal force radially outward. Can be supplied uniformly and efficiently. Therefore, it is possible to efficiently cool the input-side rotor 28 to which cooling oil is difficult to be supplied, while suppressing temperature variations among parts and local high temperatures. As a result, overheating of the input side rotor 28 can be prevented, and the structure can be downsized even if the heat capacity is small. In that case, the coil end portions 130-1 and 130-2 can be cooled effectively by using the existing output-side rotor support members 83 and 84 at low cost, in a compact manner. Furthermore, since the oil passing through the oil passages 90-1 and 90-2 and the coil end portions 130-1 and 130-2 are in contact with each other uniformly and with a flow velocity, the cooling capacity of the coil end portions 130-1 and 130-2 In addition, it is possible to suppress the temperature variation of each part and the local high temperature. In addition, since the oil reservoirs 85e and 85f communicate with each other through the oil hole 88, the left and right coil end portions 130-1 and 130-2 can be uniformly cooled. High temperature can be suppressed.

  Furthermore, in this embodiment, the oil used for cooling the input side rotor 28 can be uniformly and efficiently supplied to the side surfaces 18a and 18b of the output side rotor 18 of the intermediate layer by centrifugal force. Therefore, it is possible to efficiently cool the permanent magnets 32 and 33 of the output-side rotor 18 that are sandwiched between the input-side rotor 28 and the stator 16 and are difficult to supply cooling oil, and prevent the output-side rotor 18 from being overheated. Can do. In that case, the existing output side rotor support members 83 and 84 can be used to cool the output side rotor 18 at low cost, in a compact and effective manner. Further, in the present embodiment, the oil used for cooling the output-side rotor 18 is supplied to the stator winding 20 (coil end portions 120-1 and 120-2) of the outermost stator 16 by centrifugal force. , 84a can be supplied uniformly and efficiently. Therefore, the stator 16 can be efficiently cooled, and overheating of the stator 16 can be prevented. As a result, the volume of the structure of the rotating electrical machine 10 can be reduced (downsized). Furthermore, since the oil flow in the oil passages 90-1 and 90-2 between the output-side rotor support members 83 and 84 and the side surfaces 18a and 18b of the output-side rotor 18 is increased, the cooling performance of the output-side rotor 18 is improved. To do. When the stator winding 20 is cooled, the oil supply ports 83a and 84a are disposed in the portions having large outer diameters of the oil passages 90-1 and 90-2, so that the coil end portions 120-1 and 120-2 are provided. The centrifugal force of the scattered oil can be increased, and the coil end portions 120-1 and 120-2 can be effectively cooled. In addition, since the oil passages 90-1 and 90-2 between the output-side rotor support members 83 and 84 and the side surfaces 18a and 18b of the output-side rotor 18 are connected over the entire circumference on the inner circumference side, Oil can be evenly distributed to the oil supply ports 83a and 84a.

  Further, in the present embodiment, when a torque (electromagnetic coupling torque) is applied between the input side rotor 28 and the output side rotor 18 by the induced current of the rotor winding 30, the coil end portion of the rotor winding 30. A rotational speed difference is generated between 130-1 and 130-2 and the output-side rotor support members 83 and 84. Therefore, the oil passage 90-1 between the output-side rotor support member 83 and the outer peripheral surface 130-1b of the coil end portion 130-1, and the side surface 130-2a of the output-side rotor support member 84 and the coil end portion 130-2. Torque can be transmitted between the input-side rotor 28 and the output-side rotor 18 via oil passing through the oil passage 90-2 between the outer peripheral surface 130-2b and the outer peripheral surface 130-2b, thereby realizing a fluid coupling function. Therefore, the oil cooling structure and the power transmission structure can be integrated. Therefore, when torque is applied between the input side rotor 28 and the output side rotor 18, not only the electromagnetic coupling torque caused by the induced current of the rotor winding 30 but also the oil passing through the oil passages 90-1 and 90-2 is used. The fluid coupling torque can also be used, and the power transmission share can be distributed. As a result, the electromagnetic coupling torque capacity (particularly the magnet amount) can be reduced, and the volume of the structure of the rotating electrical machine 10 can be further reduced (downsized).

  In this embodiment, when the input shaft 34 and the input-side rotor 28 are not rotating, such as when EV traveling is performed, it is difficult to supply oil by centrifugal force from the oil discharge port 92 of the input shaft 34. When oil is interposed between the input side rotor 28 and the output side rotor 18 (oil passages 90-1 and 90-2), the output side rotor 18 is rotationally driven by torque acting between the stator 16 and the output side rotor 18. In doing so, the fluid coupling force due to oil is lost. Therefore, when the output side rotor 18 is rotationally driven by the torque acting between the stator 16 and the output side rotor 18 with the input side rotor 28 (engine 36) stopped, the oil discharge port of the input shaft 34 is used. The oil supply from 92 is stopped. In that case, the stator 16 is cooled by supplying oil to the coil end portions 120-1 and 120-2 of the stator winding 20 from the oil supply port 89 formed in the casing 15 on the outer peripheral side of the stator 16. On the other hand, when an electromagnetic coupling torque is applied between the input side rotor 28 and the output side rotor 18 by the induced current of the rotor winding 30, by supplying oil from the oil discharge port 92 of the input shaft 34, The input side rotor 28, the output side rotor 18 and the stator 16 are cooled, and fluid coupling torque is also applied. In that case, the oil supply amount can be reduced by switching between the oil supply from the oil discharge port 92 and the oil supply from the oil supply port 89, and the oil pump capacity / loss / cost / physique is suppressed. be able to.

  In this embodiment, for example, as shown in FIGS. 12 and 13, the oil ejection ports 85 c and 85 d are formed by forming notches in the inner peripheral portions of both ends 85 a and 85 b in the rotation axis direction of the oil storage member 85. It is also possible. According to this configuration, the shapes of the oil outlets 85c and 85d are simple, and the cost can be reduced. In the present embodiment, the oil ejection ports 85c and 85d can be omitted. In that case, the oil stored in the oil storage member 85 overflows from both ends 85a and 85b in the rotation axis direction, and the inner peripheral surfaces of the coil end portions 130-1 and 130-2 of the rotor winding 30 due to centrifugal force. It scatters to 130-1c and 130-2c. According to this configuration, there is no need to form through holes or notches at both ends 85a and 85b in the rotational axis direction of the oil storage member 85, and further cost reduction can be achieved.

  Further, in the present embodiment, for example, as shown in FIGS. 14 and 15, oil 87 from the oil discharge port 92 is introduced into a gap 71 between the outer peripheral surface of the input-side rotor 28 and the inner peripheral surface of the output-side rotor 18. An oil introduction passage 72 can be provided. In the example shown in FIGS. 14 and 15, a plurality of oil introduction passages 72 are formed in the rotor core 52 and the oil storage member 85 of the input side rotor 28, and the gap 71 and the oil reservoir 85 f communicate with each other via the oil introduction passage 72. ing. The oil introduction passage 72 is formed by a through hole extending along the radial direction of the input side rotor 28, and is arranged at regular intervals with respect to the circumferential direction of the input side rotor 28. The oil introduction passage 72 is preferably disposed near the center of the rotor core 52 with respect to the rotation axis direction.

  14 and 15, when the input shaft 34 and the input-side rotor 28 are rotated, the oil 87 stored in the oil reservoirs 85e and 85f of the oil storage member 85 is indicated by arrows e and f in FIG. Then, the oil is introduced into the gap 71 between the input side rotor 28 and the output side rotor 18 through the oil introduction passage 72 by centrifugal force. When a rotational speed difference is generated between the input-side rotor 28 and the output-side rotor 18, torque is transmitted between the input-side rotor 28 and the output-side rotor 18 through the oil introduced into the gap 71. And a fluid coupling function can be realized. Therefore, when a torque is applied between the input side rotor 28 and the output side rotor 18, not only the electromagnetic coupling torque due to the induced current of the rotor winding 30 but also the fluid coupling torque via oil passing through the gap 71. Can be used. As a result, the electromagnetic coupling torque capacity (particularly the magnet amount) can be reduced. When using the fluid coupling torque, the oil 87 stored in the oil storage member 85 is directly guided to the gap 71 between the input-side rotor 28 and the output-side rotor 18 by centrifugal force. Can be supplied.

  In this embodiment, as shown in FIGS. 16 and 17, for example, an oil introduction passage 72-1 is provided between the rotor core 52 of the input side rotor 28 and the coil end portions 130-1 and 130-2 of the rotor winding 30. , 72-2 can be formed. The gap 71 and the oil reservoir 85e communicate with each other via the oil introduction passage 72-1, and the gap 71 and the oil reservoir 85f communicate with each other via the oil introduction passage 72-2. The length of the rotor core 52 in the rotation axis direction is shorter than the length of the output side rotor 18 (rotor core 53) in the rotation axis direction, and the oil introduction passages 72-1 and 72-2 are in the radial direction of the output side rotor 18 (rotor core 53). Is facing. When the input shaft 34 and the input-side rotor 28 are rotated, the oil 87 stored in the oil reservoirs 85e and 85f causes the oil introduction passages 72-1 and 72-2 by centrifugal force as indicated by arrows e and f in FIG. And is introduced into a gap 71 between the input-side rotor 28 and the output-side rotor 18. Therefore, when a torque is applied between the input side rotor 28 and the output side rotor 18, not only the electromagnetic coupling torque due to the induced current of the rotor winding 30 but also the fluid coupling torque via oil passing through the gap 71. Can be used. In the configuration example shown in FIGS. 14 and 15, there is a possibility that an electromagnetic influence may be exerted by providing the oil introduction passage 72 (hole) in the rotor core 52. However, in the configuration examples shown in FIGS. Thus, oil can be supplied to the gap 71 between the input side rotor 28 and the output side rotor 18.

  Further, when the oil introduction passage 72 is formed in the rotor core 52 and the oil storage member 85 of the input side rotor 28, for example, as shown in FIGS. 18 and 19, the oil introduction passage 72 and the connecting member 81 are aligned in the rotational axis direction. It is also possible to dispose the oil introduction passage 72 and the connecting member 81 opposite to each other in the radial direction. In the example shown in FIGS. 18 and 19, the oil introduction passage 72 faces the outer peripheral portion of the connecting member 81 because the radially inner end portion leads to the outer peripheral portion of the connecting member 81. Further, the oil introduction passage 72 is formed so as to protrude from the outer peripheral portion of the connecting member 81 to both sides in the rotating shaft direction because the rotating shaft direction width (hole diameter) is larger than the thickness of the connecting member 81 (rotating shaft direction width). Has been. As a result, the oil introduction passage 72 communicates with the oil reservoirs 85e and 85f, and the oil reservoirs 85e and 85f communicate with each other via the oil introduction passage 72. 18 and 19, even if the oil hole 88 is omitted, the oil reservoirs 85e and 85f can be communicated with each other, and processing effort and cost can be suppressed. Furthermore, the input side rotor 28 can be directly cooled with oil.

  Further, when the oil introduction passage 72 is formed in the rotor core 52 and the oil storage member 85 of the input side rotor 28, the oil introduction passage 72 can be further formed in the connecting member 81 as shown in FIG. . In the example shown in FIG. 20, the oil introduction passage 72 formed in the connecting member 81 communicates with the oil discharge port 92 by penetrating to the input shaft 34 along the radial direction. The connecting member 81 has a thickness (rotational axis width) that varies depending on the radial position, so that the connecting member 81 is thicker than the rotational axis width (hole diameter) of the oil introduction passage 72 and the rotational axis of the oil introduction passage 72. A portion that is thinner inward than the outer periphery of the oil introduction passage 72 because it is thinner than the width in the direction (hole diameter), and the oil outlets 74a and 74b that open to the outside of the connecting member 81 are formed in these recessed portions. 74c are formed. The oil ejected from the oil ejection ports 74a and 74b is stored in the oil reservoirs 85e and 85f, and the oil ejected from the oil ejection port 74c is supplied to the bearings 61 and 62 and used for lubrication. The oil outlets 74a, 74b, and 74c here can be formed by drilling holes in the connecting member 81 having different thicknesses depending on the radial position, for example, as shown in FIG. is there. According to the configuration example shown in FIG. 20, the cost can be reduced by making the hole (oil discharge port 92) formed in the input shaft 34 and the hole (oil introduction passage 72) formed in the connecting member 81 and the rotor core 52 common. be able to. Further, the oil introduction passage 72 formed in the connecting member 81 can efficiently guide the oil from the oil discharge port 92 to the oil reservoirs 85e and 85f and the bearings 61 and 62.

  In the configuration examples shown in FIGS. 14 to 20 described above, when the input shaft 34 and the input-side rotor 28 are not rotating, such as when EV traveling is performed, the centrifuge from the oil discharge port 92 of the input shaft 34 is performed. Besides being difficult to supply oil by force, when oil is interposed in the gap 71 between the input side rotor 28 and the output side rotor 18, the output side rotor 18 is rotated by the torque acting between the stator 16 and the output side rotor 18. When driving, the fluid coupling force due to oil is lost. Accordingly, also in the configuration examples shown in FIGS. 14 to 20, the output side rotor 18 is rotationally driven by the torque acting between the stator 16 and the output side rotor 18 in a state where the input side rotor 28 (engine 36) is stopped. When doing so, the oil supply from the oil discharge port 92 of the input shaft 34 is stopped. In that case, the stator 16 is cooled by supplying oil to the coil end portions 120-1 and 120-2 of the stator winding 20 from the oil supply port 89 formed in the casing 15 on the outer peripheral side of the stator 16. On the other hand, when an electromagnetic coupling torque is applied between the input side rotor 28 and the output side rotor 18 by the induced current of the rotor winding 30, by supplying oil from the oil discharge port 92 of the input shaft 34, The input side rotor 28, the output side rotor 18 and the stator 16 are cooled, and fluid coupling torque is also applied. In that case, the oil supply amount can be reduced by switching between the oil supply from the oil discharge port 92 and the oil supply from the oil supply port 89, and the oil pump capacity / loss / cost / physique is suppressed. be able to.

  Moreover, in embodiment described above, the input / output of the rotary electric machine 10 can also be replaced. 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, and the power from the first rotor 28 is shifted by the transmission 44 and transmitted to the wheels 38, so that the second rotor 18 serves as the input-side rotor. The first rotor 28 becomes the output side rotor. In the embodiment described above, the stator 16 and the inverter 40 can be omitted.

  In the above description of the embodiment, the case where the boost converter 94 is provided as a DC-DC converter that converts the voltage rectified by the rectifier 93 and outputs the voltage is described. However, in this embodiment, it is also possible to provide a step-down converter or a step-up / down converter as the DC-DC converter.

  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, 15 Casing, 16 Stator, 18 2nd rotor (output side rotor), 20 Stator winding, 24 Output shaft, 28 1st rotor (input side rotor), 30 Rotor winding, 32, 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, 61, 62, 63 bearing, 71 gap, 72, 72-1, 72-2 Oil introduction passage, 81, 82 connecting member, 83, 84 Output side rotor support member, 83a, 84a, 89 Oil supply port, 85 Oil reservoir member, 85c, 85d Oil outlet, 85e, 85f Oil reservoir, 87 Oil, 88 Oil hole, 90-1, 90-2, 91 Oil passage, 92 Oil discharge port, 93 Rectifier 94 boost converter (DC-DC converter), 95 slip ring, 96 brush, 120-1,120-2,130-1,130-2 coil end portion.

Claims (12)

1st rotation which is arrange | positioned at the outer peripheral side of a rotating shaft, and is a 1st rotor which rotates with a rotating shaft, Comprising: The rotor coil | winding which can generate | occur | produce a rotating magnetic field by an alternating current flows With the child,
A second rotor disposed on the outer peripheral side of the first rotor and capable of rotating relative to the first rotor, wherein the first rotor and the first rotor according to the action of a rotating magnetic field generated in the rotor winding A second rotor on which torque acts,
A rotating electric machine comprising:
On the inner periphery of the first rotor, a working liquid storage member that rotates together with the rotating shaft and the first rotor and stores the working liquid in the working liquid reservoir is installed,
The rotating shaft is formed with a working liquid discharge port for discharging the working liquid to the working liquid reservoir.
Both ends of the rotor winding in the rotation axis direction protrude from the rotor core and the working liquid storage member to both sides in the rotation axis direction.
A rotating electrical machine that causes the working liquid stored in the working liquid reservoir to scatter from the rotating shaft direction both ends of the working liquid reservoir member to both ends of the rotor winding in the rotating shaft direction by centrifugal force when the first rotor rotates. The rotating electrical machine according to claim 1,
A rotating electrical machine in which a passage forming member for forming a working liquid passage is provided adjacent to both ends of the rotor winding in the rotation axis direction of the rotor winding. The rotating electrical machine according to claim 2,
The passage forming member is a rotating electrical machine that is a member that rotates together with the second rotor. The rotating electrical machine according to claim 2 or 3,
The passage forming member is a rotating electrical machine that is a member that forms a working liquid passage between both end surfaces of the second rotor in the rotation axis direction. The rotating electrical machine according to any one of claims 2 to 4,
A stator winding disposed on the outer peripheral side of the second rotor and capable of generating a rotating magnetic field when an alternating current flows, further comprising a stator wound around the stator core;
A torque acts between the second rotor and the stator in response to the rotating magnetic field generated in the stator winding,
Both ends of the stator winding in the rotation axis direction protrude from the stator core to both sides in the rotation axis direction.
A rotating electrical machine in which a working liquid supply port is formed in the passage forming member for supplying the working liquid passing through the working liquid passage to both ends of the stator winding in the rotation axis direction by centrifugal force. The rotating electrical machine according to any one of claims 1 to 5,
A rotating electrical machine in which working liquid outlets for ejecting working liquid stored in the working liquid reservoir when the first rotor rotates are formed at both ends in the rotation axis direction of the working liquid storage member. The rotating electrical machine according to any one of claims 1 to 6,
The rotating shaft and the working liquid storage member are connected via a connecting member,
The working liquid reservoir is formed by sandwiching a connecting member between both ends of the working liquid reservoir member in the rotation axis direction.
The rotating electrical machine, wherein the connecting member is formed with a working fluid communication hole for communicating working fluid reservoirs formed across the connecting member. The rotating electrical machine according to any one of claims 1 to 6,
A rotating electrical machine in which a working liquid introduction passage is formed for introducing the working liquid from the working liquid discharge port into a gap between the first rotor and the second rotor. The rotating electrical machine according to claim 8, wherein
The working electrical fluid introduction passage is formed in the rotor core of the first rotor, and introduces working fluid stored in a working fluid reservoir into the gap. The rotating electrical machine according to claim 9, wherein
The rotating shaft and the working liquid storage member are connected via a connecting member,
The working liquid reservoir is formed by sandwiching a connecting member between both ends of the working liquid reservoir member in the rotation axis direction.
The working electric fluid introduction passage faces the outer peripheral portion of the connecting member and is formed so as to protrude from the outer peripheral portion of the connecting member to both sides in the rotation axis direction so as to communicate with the working liquid reservoir. The rotating electrical machine according to claim 9, wherein
The rotating shaft and the working liquid storage member are connected via a connecting member,
The working electric fluid introduction passage is also formed in the connecting member, and communicates with the working liquid discharge port. The rotating electrical machine according to claim 8, wherein
The working liquid introduction passage is formed between the rotor core of the first rotor and both ends of the rotor winding in the rotation axis direction, and introduces working liquid stored in the working liquid reservoir into the gap. .

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