JP4645415B2 - Vehicle drive device - Google Patents

Description

  The present invention relates to a vehicle drive device, and more particularly, to a vehicle drive device including a reactor as a component.

  As a type of vehicle drive device, a hybrid vehicle drive device including a motor as a vehicle drive force source is known in which a battery output voltage is boosted by a boost converter and used for motor drive. For example, Japanese Patent Laying-Open No. 2003-134646 (Patent Document 1) discloses a hybrid vehicle drive device including a boost converter having a reactor as a constituent element.

  In general, a reactor has a configuration in which a coil is wound around a core made of a magnetic material in order to ensure inductance. In such a configuration, the core generates heat as electromagnetic energy is converted in the reactor. Since the temperature rise of the reactor due to the core heat generation may cause a decrease in voltage conversion efficiency in the boost converter, the reactor requires a heat generation mechanism for core heat generation.

  As an example, in Japanese Patent Application Laid-Open No. 2002-217040 (Patent Document 2), for a static induction electric device including a reactor, by providing a heat radiation fin formed by a heat conductive plate on the outer surface of a core (iron core), A configuration for improving the cooling efficiency is disclosed.

In addition, miniaturization of vehicle-mounted components is a common problem for any type of vehicle. In a hybrid vehicle, the inverter and the motor are housed in a single case and integrated to reduce the size of the drive device. The technique is disclosed in Japanese Patent Application Laid-Open No. 2004-343845 (Patent Document 3).
JP 2003-134606 A JP 2002-2107040 A JP 2004-343845 A

  However, in the heat dissipation mechanism of the reactor (stationary induction electrical device) disclosed in Patent Document 2, since the heat dissipation heat conduction plate newly provided with fins is provided on the outer surface of the core, the reactor is enlarged. For this reason, there is a problem in application to a boost converter as a component part of a vehicle drive device in which vehicle mountability is particularly important.

  Further, in the configuration disclosed in Patent Document 3 in which the motor and the electric circuit group (inverter) for driving the motor are integrated, the presence of the boost converter is not particularly mentioned. That is, in such an integrated configuration, there is a lack of recognition of the issue of how to achieve both efficient arrangement of the reactor and ensuring cooling performance.

  The present invention has been made to solve such problems, and an object of the present invention is to integrate a rotating electric machine and an electric circuit group (converter, inverter, etc.) for driving the rotating electric machine. In the vehicle drive device, it is to ensure the cooling performance of the reactor.

  A vehicle drive device according to the present invention includes a rotating electrical machine, a power control unit, a case, and a heat transfer agent. The power control unit is configured to control the rotating electrical machine. The case is configured to accommodate the rotating electrical machine and the power control unit. The power control unit includes an inverter that drives the rotating electrical machine and a voltage converter that boosts the power supply voltage and applies the boosted voltage to the inverter. The voltage converter includes a reactor. The reactor includes a core in which heat radiating fins are formed at least at a part, and a coil wound around the core. The heat transfer agent contacts the core and case.

  According to the vehicle drive device described above, a drive device having an integrated structure that integrally accommodates a rotating electrical machine (motor generator), an inverter for driving the rotating electrical machine, and a voltage converter is provided, and the radiator fin is provided in the core of the reactor. It is possible to form and dissipate heat between the core and the case via a heat transfer agent. Therefore, it is possible to secure the cooling capacity of the reactor whose heat dissipation is enhanced by the heat radiation fins, using the case of the drive device having a large heat capacity for the integrated housing as the heat radiation destination. As a result, in the drive device having the integrated structure in which the reactor is arranged in a limited space, it is possible to suppress a temperature increase of the reactor and avoid a decrease in efficiency of the boost converter.

Preferably, in the vehicle drive device according to the present invention, the core is composed of a plurality of stacked magnetic plates. Furthermore, an uneven shape is provided in a part of the outer shape of each magnetic plate,
The heat radiating fins are formed by a set of stacked uneven shapes.

  According to the vehicle drive device described above, a core in which heat dissipating fins for improving heat dissipation can be realized by a laminated structure of magnetic plates.

  Preferably, in the vehicle drive device according to the present invention, the core is formed of a dust core.

  According to the vehicle drive device described above, since the core has a powder magnetic core, the degree of freedom of the shape of the radiating fins is increased, so that the high heat dissipation of the reactor core can be ensured.

  More preferably, in the vehicle drive device according to the present invention, the coil is wound around a portion where the heat radiating fin of the core is not formed.

  According to the vehicle drive device described above, since the radiating fin is not formed at the coil winding portion of the reactor, the workability of the coil winding work can be improved. In addition, the reactor structure can be reduced in size.

  Alternatively, preferably, in the vehicle drive device according to the present invention, the heat transfer agent is lubricating oil for lubricating and cooling the rotating electrical machine, and the control device further includes a lubricating oil circulation mechanism. Furthermore, a circulation path for lubricating oil is formed in the case by a circulation mechanism, and the reactor is disposed on the circulation path so that the core contacts the lubricating oil and transfers heat.

  Particularly in such a configuration, the case includes an oil pan disposed downstream on the circulation path, and the circulation mechanism pumps the lubricating oil from the oil pan in accordance with the rotation of the rotating electrical machine and is upstream of the reactor of the lubrication path. Includes gears to send to the part. Alternatively, the case includes an oil pan disposed downstream on the circulation path, and the circulation mechanism has a gear that pumps up the lubricating oil from the oil pan in accordance with the rotation of the rotating electrical machine and sends it to the upstream portion of the reactor of the lubrication path. Including.

  According to the vehicle drive device described above, by increasing the heat dissipation of the reactor core by forming the radiation fins, the lubricant for the rotating electrical machine is used as the coolant, that is, the coolant for cooling the reactor core (for example, cooling water) is newly added. Without providing, the cooling capacity of the reactor can be ensured by avoiding an increase in the size of the drive unit.

  More preferably, in the vehicle drive device according to the present invention, the case includes a first storage chamber that stores the reactor, and the reactor is immersed in the lubricating oil in the first storage chamber. In particular, in such a configuration, the case further includes a second storage chamber that stores the rotating electrical machine, and a partition that partitions the first and second storage chambers, and the partition forms a part of the circulation path. A hole is provided. Alternatively, the first storage chamber is an oil pan that stores lubricating oil.

  According to the vehicle drive device, it is possible to increase the cooling capacity of the reactor by immersing the reactor in the lubricating oil in the first housing chamber.

  Preferably, the vehicle further includes an internal combustion engine, and the drive device combines the power generated by the rotating electrical machine with the power generated by the internal combustion engine and the damper coupled to the crankshaft of the internal combustion engine. And a power transmission mechanism for transmitting. Furthermore, the case is integrally configured to accommodate the damper, the rotating electrical machine, and the power transmission mechanism.

  According to the vehicle drive device described above, the present invention can be applied to a drive device for a hybrid vehicle that further accommodates a damper and a power transmission mechanism, thereby ensuring the cooling capacity of the reactor.

  According to the vehicle drive device of the present invention, the cooling performance of the reactor can be ensured in the structure in which the rotating electrical machine and the electric circuit group (converter, inverter, etc.) for driving the rotating electrical machine are integrally housed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  As will be apparent from the following description, the present invention is directed to a structure of a reactor mounted on a vehicle drive device and a cooling system configuration thereof. In the present embodiment, as a typical example of a vehicle drive device including a reactor as a component, a preferable configuration of a drive device for a hybrid vehicle including a motor that is a “rotating electric machine” and an internal combustion engine (engine) as a vehicle drive force source. First, I will explain. A drive device for a hybrid vehicle described below includes a motor (hereinafter also referred to as a motor generator) and an electric circuit system including a converter that includes an inverter and a reactor that drive the motor generator as components. The integrated structure is suitable for downsizing.

  However, the application of the present invention is not limited to a hybrid vehicle equipped with a drive device as will be described below, and any hybrid vehicle having any configuration as long as it is a vehicle drive device including a reactor as a component. The point which can apply this invention to an electric vehicle etc. is described definitely.

[Description of vehicle components]
FIG. 1 is a circuit diagram showing a configuration related to motor generator control of hybrid vehicle 100 according to the embodiment of the present invention.

  Referring to FIG. 1, vehicle 100 includes a drive device 20, a control device 30, a battery unit 40, and an engine and wheels (not shown).

  Drive device 20 includes motor generators MG1 and MG2, a power split mechanism PSD, a reduction gear RD, and a power control unit 21 that controls motor generators MG1 and MG2.

  The power split mechanism PSD is basically a mechanism that is coupled to the engine and the motor generators MG1 and MG2 and distributes the power between them. For example, as the power split mechanism, a planetary gear mechanism having three rotating shafts of a sun gear, a planetary carrier, and a ring gear can be used.

  Two rotating shafts of power split device PSD are connected to the rotating shafts of engine and motor generator MG1, respectively, and the other one rotating shaft is connected to speed reducer RD. The rotation of motor generator MG2 is decelerated by reduction gear RD integrated with power split mechanism PSD and transmitted to power split mechanism PSD.

  The rotation shaft of the speed reducer is coupled to the wheel by a reduction gear or a differential gear (not shown). The reduction gear is not essential, and may be configured to transmit the rotation of motor generator MG2 to power split device PSD without reducing the speed.

  The battery unit 40 is provided with terminals 41 and 42. The drive device 20 is provided with terminals 43 and 44. Vehicle 100 further includes a power cable 6 that connects terminal 41 and terminal 43, and a power cable 8 that connects terminal 42 and terminal 44.

  The battery unit 40 includes a battery B, a system main relay SMR3 connected between the negative electrode of the battery B and the terminal 42, a system main relay SMR2 connected between the positive electrode of the battery B and the terminal 41, a battery A system main relay SMR1 and a limiting resistor R are connected in series between the positive electrode of B and the terminal 41. System main relays SMR1-SMR3 are controlled to be in a conductive / non-conductive state in accordance with a control signal SE provided from control device 30.

  The battery unit 40 further includes a voltage sensor 10 that measures a voltage VB between terminals of the battery B, and a current sensor 11 that detects a current IB flowing through the battery B.

  As the battery B, a secondary battery such as nickel metal hydride or lithium ion, a fuel cell, or the like can be used. Further, a large-capacity capacitor such as an electric double layer capacitor can be used as a power storage device instead of the battery B.

  Power control unit 21 includes inverters 22 and 14 provided corresponding to motor generators MG1 and MG2, respectively, and boost converter 12 provided in common with inverters 22 and 14.

  Boost converter 12 boosts the voltage between terminals 43 and 44. Inverter 14 converts the DC voltage applied from boost converter 12 into a three-phase AC and outputs the same to motor generator MG2.

  Boost converter 12 includes a reactor L1 having one end connected to terminal 43, IGBT elements Q1, Q2 connected in series between output terminals of boost converter 12 that outputs boosted voltage VH, and IGBT element Q1, Diodes D1, D2 connected in parallel to Q2 and a smoothing capacitor C2 are included. Smoothing capacitor C <b> 2 smoothes the voltage boosted by boost converter 12.

  Reactor L1 has the other end connected to the emitter of IGBT element Q1 and the collector of IGBT element Q2. The cathode of diode D1 is connected to the collector of IGBT element Q1, and the anode of diode D1 is connected to the emitter of IGBT element Q1. The cathode of diode D2 is connected to the collector of IGBT element Q2, and the anode of diode D2 is connected to the emitter of IGBT element Q2.

  Inverter 14 converts the DC voltage output from boost converter 12 to three-phase AC and outputs the same to motor generator MG2 that drives the wheels. Inverter 14 returns the electric power generated in motor generator MG2 to boost converter 12 along with regenerative braking. At this time, boost converter 12 is controlled by control device 30 to operate as a step-down circuit.

  Inverter 14 includes a U-phase arm 15, a V-phase arm 16, and a W-phase arm 17. U-phase arm 15, V-phase arm 16, and W-phase arm 17 are connected in parallel between the output lines of boost converter 12.

  U-phase arm 15 includes IGBT elements Q3 and Q4 connected in series, and diodes D3 and D4 connected in parallel with IGBT elements Q3 and Q4, respectively. The cathode of diode D3 is connected to the collector of IGBT element Q3, and the anode of diode D3 is connected to the emitter of IGBT element Q3. The cathode of diode D4 is connected to the collector of IGBT element Q4, and the anode of diode D4 is connected to the emitter of IGBT element Q4.

  V-phase arm 16 includes IGBT elements Q5 and Q6 connected in series, and diodes D5 and D6 connected in parallel with IGBT elements Q5 and Q6, respectively. The cathode of diode D5 is connected to the collector of IGBT element Q5, and the anode of diode D5 is connected to the emitter of IGBT element Q5. The cathode of diode D6 is connected to the collector of IGBT element Q6, and the anode of diode D6 is connected to the emitter of IGBT element Q6.

  W-phase arm 17 includes IGBT elements Q7, Q8 connected in series, and diodes D7, D8 connected in parallel with IGBT elements Q7, Q8, respectively. The cathode of diode D7 is connected to the collector of IGBT element Q7, and the anode of diode D7 is connected to the emitter of IGBT element Q7. The cathode of diode D8 is connected to the collector of IGBT element Q8, and the anode of diode D8 is connected to the emitter of IGBT element Q8.

  An intermediate point of each phase arm is connected to each phase end of each phase coil of motor generator MG2. That is, motor generator MG2 is a three-phase permanent magnet synchronous motor, and one end of each of three coils of U, V, and W phases is connected to a neutral point. The other end of the U-phase coil is connected to the connection node of IGBT elements Q3 and Q4. The other end of the V-phase coil is connected to a connection node of IGBT elements Q5 and Q6. The other end of the W-phase coil is connected to a connection node of IGBT elements Q7 and Q8.

  Current sensor 24 detects the current flowing through motor generator MG2 as motor current value MCRT2, and outputs motor current value MCRT2 to control device 30.

  Inverter 22 is connected to boost converter 12 in parallel with inverter 14. Inverter 22 converts the DC voltage output from boost converter 12 to three-phase AC and outputs the same to motor generator MG1. Inverter 22 receives the boosted voltage from boost converter 12 and drives motor generator MG1 to start the engine, for example.

  Inverter 22 also returns electric power generated by motor generator MG1 to boost converter 12 by the rotational torque transmitted from the crankshaft of the engine. At this time, boost converter 12 is controlled by control device 30 to operate as a step-down circuit.

  Although the internal configuration of inverter 22 is not shown, it is the same as inverter 14, and detailed description will not be repeated.

  Control device 30 receives torque command values TR1, TR2, motor rotation speeds MRN1, MRN2, voltages VB, VL, VH, current IB values, motor current values MCRT1, MCRT2, and start signal IGON.

  Here, torque command value TR1, motor rotational speed MRN1 and motor current value MCRT1 are related to motor generator MG1, and torque command value TR2, motor rotational speed MRN2 and motor current value MCRT2 are related to motor generator MG2.

  Further, the voltage VB is the voltage of the battery B, and the current IB is a current flowing through the battery B. Voltage VL is a voltage before boost of boost converter 12, and voltage VH is a voltage after boost of boost converter 12.

  Control device 30 outputs to boost converter 12 a control signal PWU for giving a boost instruction, a control signal PWD for giving a step-down instruction, and a signal CSDN for instructing prohibition of operation.

  Further, control device 30 converts drive instruction PWMI2 for converting the DC voltage, which is the output of boost converter 12 to inverter 14, into AC voltage for driving motor generator MG2, and the AC voltage generated by motor generator MG2. A regenerative instruction PWMC2 which is converted into a DC voltage and returned to the boost converter 12 side is output.

  Similarly, control device 30 converts drive voltage PWMI1 for converting a DC voltage into an AC voltage for driving motor generator MG1 for inverter 22, and converts the AC voltage generated by motor generator MG1 into a DC voltage and boosts the voltage. A regeneration instruction PWMC1 to be returned to the converter 12 side is output.

  FIG. 2 is a schematic diagram for explaining details of the power split mechanism PSD and the speed reducer RD in FIG. 1.

  Referring to FIG. 2, this vehicle drive device includes motor generator MG2, a reduction gear RD connected to the rotation shaft of motor generator MG2, and an axle that rotates according to the rotation of the rotation shaft decelerated by reduction gear RD. And an engine 4, a motor generator MG1, a reduction gear RD, and a power split mechanism PSD that distributes power between the engine 4 and the motor generator MG1. Reducer RD has a reduction ratio from motor generator MG2 to power split device PSD of, for example, twice or more.

  The crankshaft 50 of the engine 4, the rotor 32 of the motor generator MG1, and the rotor 37 of the motor generator MG2 rotate about the same axis.

  The power split mechanism PSD is a planetary gear in the example shown in FIG. 2, and is supported so as to be rotatable coaxially with the crankshaft 50 and a sun gear 51 coupled to a hollow sun gear shaft penetrating the crankshaft 50 through the shaft center. The ring gear 52 is disposed between the sun gear 51 and the ring gear 52, and revolves while rotating around the outer periphery of the sun gear 51. The pinion gear 53 is coupled to the end of the crankshaft 50 and supports the rotation shaft of each pinion gear 53. A planetary carrier 54.

  In the power split mechanism PSD, a sun gear shaft coupled to the sun gear 51, a ring gear case coupled to the ring gear 52, and a crankshaft 50 coupled to the planetary carrier 54 serve as power input / output shafts. When the power input / output to / from any two of the three axes is determined, the power input / output to the remaining one axis is determined based on the power input / output to the other two axes.

  A counter drive gear 70 for taking out power is provided outside the ring gear case, and rotates integrally with the ring gear 52. Counter drive gear 70 is connected to power transmission reduction gear RG. Power is transmitted between the counter drive gear 70 and the power transmission reduction gear RG. The power transmission reduction gear RG drives the differential gear DEF. On the downhill or the like, the rotation of the wheel is transmitted to the differential gear DEF, and the power transmission reduction gear RG is driven by the differential gear DEF.

  Motor generator MG1 includes a stator 31 that forms a rotating magnetic field, and a rotor 32 that is disposed inside stator 31 and has a plurality of permanent magnets embedded therein. The stator 31 includes a stator core 33 and a three-phase coil 34 wound around the stator core 33. Rotor 32 is coupled to a sun gear shaft that rotates integrally with sun gear 51 of power split device PSD. The stator core 33 is formed by laminating thin magnetic steel plates and is fixed to a case (not shown).

  Motor generator MG1 operates as an electric motor that rotationally drives rotor 32 by the interaction between the magnetic field generated by the permanent magnet embedded in rotor 32 and the magnetic field formed by three-phase coil 34. Motor generator MG1 also operates as a generator that generates electromotive force at both ends of three-phase coil 34 due to the interaction between the magnetic field generated by the permanent magnet and the rotation of rotor 32.

  Motor generator MG2 includes a stator 36 that forms a rotating magnetic field, and a rotor 37 that is disposed inside stator 31 and has a plurality of permanent magnets embedded therein. The stator 36 includes a stator core 38 and a three-phase coil 39 wound around the stator core 38.

  The rotor 37 is coupled to a ring gear case that rotates integrally with the ring gear 52 of the power split mechanism PSD by a reduction gear RD. Stator core 38 is formed, for example, by laminating thin magnetic steel plates, and is fixed to a case (not shown).

  Motor generator MG2 also operates as a generator that generates electromotive force at both ends of three-phase coil 39 by the interaction between the magnetic field generated by the permanent magnet and the rotation of rotor 37. Motor generator MG2 operates as an electric motor that rotationally drives rotor 37 by the interaction between the magnetic field generated by the permanent magnet and the magnetic field formed by three-phase coil 39.

  The speed reducer RD performs speed reduction by a structure in which a planetary carrier 66 that is one of rotating elements of a planetary gear is fixed to a case of a vehicle drive device. That is, the reduction gear RD includes a sun gear 62 coupled to the shaft of the rotor 37, a ring gear 68 that rotates integrally with the ring gear 52, and a pinion gear 64 that meshes with the ring gear 68 and the sun gear 62 and transmits the rotation of the sun gear 62 to the ring gear 68. Including.

  For example, by making the number of teeth of the ring gear 68 more than twice that of the sun gear 62, the reduction ratio can be made more than twice.

[Explanation of component arrangement in integrated structure]
Next, the arrangement of each component in the drive apparatus that integrally accommodates the inverter and converter that drive the motor generator will be described.

  FIG. 3 is a perspective view showing an external appearance of drive device 20 of the hybrid vehicle according to the embodiment of the present invention. FIG. 4 is a plan view of the driving device 20.

  Referring to FIGS. 3 and 4, the case of drive device 20 is configured to be divided into case 104 and case 102. Case 104 is a part mainly housing motor generator MG1, and case 102 is a part mainly housing motor generator MG2 and a power control unit.

  A flange 106 is formed on the case 104, a flange 105 is formed on the case 102, and the case 104 and the case 102 are integrated by fixing the flange 106 and the flange 105 with a bolt or the like.

  The case 102 is provided with an opening 108 for assembling the power control unit. Capacitor C2 is accommodated in the left inner portion (vehicle traveling direction side) of opening 108, power element substrate 120 and terminal blocks 116 and 118 are accommodated in the central portion, and reactor L1 is accommodated in the right portion. ing. The opening 108 is closed by a lid when the vehicle is mounted. Further, the capacitor C2 may be replaced on the right side and the reactor L1 may be stored on the left side.

  That is, reactor L1 is arranged on one side of the rotation shafts of motor generators MG1 and MG2, and capacitor C2 is arranged on the other side of the rotation shaft. The power element substrate 120 is disposed in a region between the capacitor C2 and the reactor L1. Below the power element substrate 120, a motor generator MG2 is arranged.

  On power element substrate 120, inverter 22 that controls motor generator MG1, inverter 14 that controls motor generator MG2, and arm portion 13 of the boost converter are mounted.

  In a region between the inverter 14 and the inverter 22, a power supply bus bar is provided so as to be stacked one above the other. One bus bar is provided from each of U-phase arm 15, V-phase arm 16 and W-phase arm 17 of inverter 14 toward terminal block 116 for connection with the stator coil of motor generator MG2. Similarly, three bus bars are provided from inverter 22 toward terminal block 118 for connection with the stator coil of motor generator MG1. The terminal block 118 on the stator coil side of the motor generator MG2 and the terminal block 116 are connected by a power cable or a bus bar. Although not shown, a terminal block is also provided for the stator coil of motor generator MG1.

  Since the power element substrate 120 reaches a high temperature, a water passage is provided under the power element substrate 120 to cool the power element substrate 120, and a cooling water inlet 114 and a cooling water outlet 112 to the water passage are provided in the case 102. It has been. In addition, this inlet_port | entrance, an exit, etc. are comprised, for example by driving the flanges 106 and 105 with respect to case 102 and driving a union nut etc.

  The voltage applied from the battery unit 40 of FIG. 1 to the terminals 43 and 44 via the power cable is boosted by the boost converter 12 including the reactor L1 and the arm unit 13, smoothed by the capacitor C2, and supplied to the inverters 14 and 22. The

  By boosting the battery voltage using the boost converter 12 in this way, it becomes possible to drive the motor generator at a high voltage exceeding 500 V while reducing the battery voltage to about 200 V, and to supply power with a small current. It is possible to suppress electric loss and realize high output of the motor.

  When drive device 20 is integrated including boost converter 12 in addition to inverters 14 and 22 and motor generators MG1 and MG2, the location of reactor L1 and capacitor C2, which are relatively large components, becomes a problem. .

5 is a side view of the driving device 20 as viewed from the X1 direction of FIG.
Referring to FIG. 5, case 102 is provided with an opening 109 for assembling and maintaining the motor generator, and this opening 109 is closed by a lid when the vehicle is mounted.

  Inside the opening 109, a motor generator MG2 is arranged. A rotor 37 is arranged inside a stator 36 to which U, V, and W phase bus bars are connected. A hollow shaft 60 is visible in the central portion of the rotor 37.

  As shown in FIG. 5, since the stator 36 of the motor generator MG2 is greatly biting into the housing chamber that houses the power control unit 21 of the case 102, the reactor L1 is arranged on one side of the motor generator MG2, and the other side is placed on the other side. Has a capacitor C2 and efficiently accommodates large components. For this reason, a compact hybrid vehicle drive device can be realized.

6 is a cross-sectional view taken along the line VI-VI in FIG.
Referring to FIG. 6, a cross section of motor generator MG2 and a cross section of a storage chamber for storing power control unit 21 are shown.

  This hybrid vehicle drive device includes motor generators MG2 and MG1 disposed behind the center axis of rotation of each rotor on the same axis, motor generator MG1 disposed behind the center axis of the crankshaft and the motor generator A power split mechanism arranged between MG1 and MG2 and a power control unit 21 for controlling motor generators MG1 and MG2 are provided. In power control unit 21, reactor L1 is arranged at least on one side and smoothing capacitor C2 is arranged on the other side at least on the rotation center axis of motor generator MG2. Motor generators MG1, MG2, power split device, and power control unit 21 are housed and integrated in a metal case.

  A partition wall 200 that partitions the two spaces is provided in the case 102 so that the lubricating oil of the motor generator MG2 does not leak to the power element substrate 120 side. A water channel 122 for cooling the power element substrate 120 is provided on the upper surface portion of the partition wall 200, and the water channel 122 communicates with the cooling water inlet 114 and the cooling water outlet 112 described above.

  A negative power supply potential is transmitted from the terminal 44 to the power element substrate 120 by the bus bar 128. A positive power supply potential is transmitted from terminal 43 to reactor L1 through another bus bar (not shown).

  Note that a portion that supports the rotation shaft 130 of the reduction gear bites into the accommodation chamber that accommodates the power control unit.

  The cross section of the motor generator MG2 will be described. The winding portion of the coil 39 of the stator 36 can be seen on the inner peripheral side of the stator. ing.

  That is, the vehicle drive device includes a motor generator MG2, a power control unit 21 that controls the motor generator MG2, and a case that houses the motor generator MG2 and the power control unit 21. Power control unit 21 includes a first inverter that drives motor generator MG2, and a voltage converter that includes a reactor L1 and boosts the power supply voltage and applies the boosted voltage to the first inverter.

  FIG. 7 is a side view of the driving device 20 viewed from the X2 direction of FIG. In FIG. 7, a control board 121 for controlling the power element is arranged on the power element board.

8 is a cross-sectional view taken along line VIII-VIII in FIG.
Referring to FIGS. 7 and 8, engine crankshaft 50 is connected to damper 124, and the output shaft of damper 124 is connected to power split mechanism PSD.

  From the side where the engine is disposed, the damper 124, the motor generator MG1, the power split mechanism PSD, the speed reducer RD, and the motor generator MG2 are disposed side by side on the same rotating shaft. The shaft of rotor 32 of motor generator MG1 is hollow, and the output shaft from damper 124 passes through this hollow portion.

  The shaft of rotor 32 of motor generator MG1 is spline-fitted with sun gear 51 on the power split mechanism PSD side. The shaft of the damper 124 is coupled to the planetary carrier 54. The planetary carrier 54 rotatably supports the rotation shaft of the pinion gear 53 around the shaft of the damper 124. The pinion gear 53 meshes with the sun gear 51 and the ring gear 52 of FIG. 2 formed on the inner periphery of the ring gear case.

  Further, the reduction gear RD side of the rotor shaft 60 of the motor generator MG2 is spline-fitted with the sun gear 62. The planetary carrier 66 of the speed reducer RD is fixed to the partition wall 202 of the case 102. The planetary carrier 66 supports the rotation shaft of the pinion gear 64. The pinion gear 64 meshes with the sun gear 62 and the ring gear 68 of FIG. 2 formed on the inner periphery of the ring gear case.

  As can be understood from FIG. 8, the motor generator MG1 and the damper 124 can be assembled from the opening 111 in the right direction of the case 104, and the motor generator MG2 can be assembled from the left opening 109 in the case 102. The reduction gear RD and the power split mechanism PSD can be assembled from the mating surfaces of the flanges 105 and 106.

  The opening 109 of the case 102 is sealed with a lid 71 and a liquid gasket so that the lubricating oil does not leak. A lid 72 is provided at the back of the opening 111 of the case 104, and the space for accommodating the MG1 is sealed with a liquid gasket or the like or an oil seal 81 so that the lubricating oil does not leak.

  The shaft of rotor 32 of motor generator MG1 is rotatably supported by ball bearing 78 provided between lid 72 and ball bearing 77 provided between partition walls 203. The shaft of the rotor 32 is hollow, and the shaft of the damper 124 passes through the inside thereof. Needle bearings 79 and 80 are provided between the shaft of the rotor 32 and the shaft of the damper 124.

  The shaft of rotor 37 of motor generator MG2 is rotatably supported by ball bearing 73 provided between lid 71 and ball bearing 74 provided between partition walls 202.

  The ring gear case in which the ring gear of the reduction gear RD and the ring gear of the power split mechanism PSD are both engraved on the inner periphery is provided by a ball bearing 75 provided between the partition wall 202 and a ball bearing 76 provided between the partition wall 203. It is supported rotatably.

  The storage chamber for storing the power control unit 21 and the storage chamber for storing the motor generator MG2 are separated by a partition wall 202 of the case 102, and a part thereof is connected by a through hole into which the terminal block 116 is inserted. The terminal bar 116 is connected to the bus bar of the stator coil of the motor generator MG2 on one side, and the bus bar of the inverter 14 is connected to the other side. A conductive member is passed through the terminal block 116 so that these bus bars can be electrically connected. That is, the terminal block 116 is configured to pass electricity without passing the lubricating oil from the motor generator MG2 side.

  Similarly, a space in which the power control unit is accommodated and a space in which motor generator MG1 is accommodated are connected by terminal block 118 in a state where electricity is passed and lubricating oil is not passed.

  FIG. 9 is a partial cross-sectional view showing a partial cross-section along IX-IX in FIG. 4. Further, FIG. 10 is a cross-sectional view showing an XX cross section in FIG. 9.

  With reference to FIG. 9 and FIG. 10, a cross section of reactor L <b> 1 is shown in the storage chamber for storing power control unit 21. In the present embodiment, reactor L1 has a structure with high heat dissipation, as will be described in detail later.

  Further, as shown in FIG. 10, the rotating shaft 130 of the reduction gear RG shown in FIG. 6 is arranged in the vicinity of the reactor L1, and the counter driven gear 132 of the reduction gear RG is shown in the center. The rotation shaft 130 of the reduction gear RG is rotatably supported by ball bearings 220 and 222. The counter driven gear 132 meshes with the counter drive gear 70 of FIG. A final drive gear 133 is provided on the same axis as the counter driven gear 132, and a differential gear DEF which is a final driven gear meshing with the final drive gear 133 is shown below the gear.

  FIG. 11 is a diagram illustrating a case outline and components housed in the case when the case is projected from the rotation axis direction.

  In FIG. 11, a damper 124 to which a crankshaft of an internal combustion engine is coupled, a rotor disposed so that the rotating shaft of the damper 124 and the rotating shaft overlap with each other, and a rotor are disposed inside a case of a vehicle drive device. A motor generator MG2 having a stator, a power split mechanism PSD that receives the torque from the damper 124 and the torque from the motor generator MG2, a rotary shaft that is substantially parallel to the rotary shaft of the damper 124, and a power split mechanism PSD Control of the motor generator MG2 and the reduction gear RG to which the torque from the transmission gear is transmitted, the differential gear DEF having a rotation shaft shifted substantially parallel to the rotation shaft of the damper 124 and meshing with the reduction gear RG and transmitting the torque to the wheels. Control including board 120, reactor L1 and capacitor C2 Knit 21 and is shown. The case houses the damper 124, the motor generator MG2, the reduction gear RG, the differential gear DEF, and the power control unit 21.

  In the projection view in which the case shown in FIG. 11 is projected from the rotation axis direction, the horizontal dimension when the vehicle drive device is mounted on the vehicle is X3. The dimension X3 is determined at both ends by the outer edge of the case portion housing the differential gear DEF and the outer edge of the case 104 housing the damper 124. Therefore, it can be seen that the capacitor C2, the substrate 120, and the reactor L1 constituting the power control unit are inside the dimension X3.

  Further, in FIG. 11, the dimension in the vertical direction (height direction) when the vehicle drive device is mounted on the vehicle is Y3. The lower end of the dimension Y3 is determined by the outer edge of the portion of the case that accommodates the differential gear DEF. Further, the upper end of the dimension Y3 is determined by the outer edge of the portion of the case that accommodates the damper 124. Therefore, it can be seen that the capacitor C2, the substrate 120, and the reactor L1 constituting the power control unit 21 are disposed inside the dimension Y3.

  When the case is projected from the direction of the rotation axis, the height of the portion of the case that houses the power control unit 21 when mounted on the vehicle is the space of the remaining case, that is, the damper 124, the motor generator MG2, the reduction gear. The case is configured and the power control unit 21 is disposed so as not to exceed at least the height when the vehicle mounted on the projection unit that accommodates the RG and the differential gear DEF. Thereby, the center of gravity of the vehicle can be lowered, and the running stability can be increased.

  In addition, the case is configured so that the position of the projection portion of the portion that accommodates the power control unit 21 of the case is positioned inside the projection portion of the remaining case space in the horizontal direction when the vehicle is mounted. Is placed. Thereby, the physique of a vehicle drive device is made small.

  FIG. 12 is a diagram showing a case outline and components housed inside when the case is projected from a direction perpendicular to the rotation axis direction and perpendicular to the vertical direction.

  Referring to FIG. 12, the dimension X3 in the direction perpendicular to the vertical direction when mounted on the vehicle is also measured at both ends between the outer edge of the lid that accommodates the motor generator MG2 of the case and the outer edge of the portion that accommodates the damper 124 of the case. It can be seen that the capacitor C2, the substrate 120, and the reactor L1 constituting the power control unit are inside the dimension Z3.

  That is, as described with reference to FIG. 11, the dimension Y3 in the vertical direction (height direction) is determined by the portion that accommodates the damper 124, the motor generator MG2, the reduction gear RG, and the differential gear DEF. Further, in FIG. 12, the portion that accommodates the power control unit 21 including the substrate 120, the reactor L <b> 1, and the capacitor C <b> 2 is orthogonal to the rotation axis direction and projected from the direction perpendicular to the vertical direction when mounted on the vehicle. The projection unit is provided so as to be included in the remaining case space, that is, the projection unit of the portion that accommodates the damper 124, the motor generator MG2, the reduction gear RG, and the differential gear DEF.

  In this manner, in addition to the motor generators MG1, MG2, the reduction gear RD, and the power split mechanism PSD, the reduction gear RG and the differential gear DEF are arranged, which is a component of the power control unit using the surrounding empty space. A power element substrate 120, a reactor L1, and a capacitor C2 are arranged. As a result, a compact hybrid vehicle drive device can be realized while the height is kept low.

  In particular, as shown in FIG. 11, not only the empty space on one side is used for motor generator MG2, but also the reactor L1 and capacitor C2 are arranged in the empty space on both sides, respectively, so that the weight relative to motor generator MG2 is increased. The balance is improved, and further space saving can be achieved.

  The power split mechanism PSD, the reduction gear RG to which the torque from the power split mechanism PSD is transmitted, and the differential gear DEF that meshes with the reduction gear RG and transmits the torque to the wheels as a whole are based on the power generated by the engine. This corresponds to a “power transmission mechanism” that combines the power generated by the motor generators MG1 and MG2 and transmits the resultant power to the drive shaft. Further, both reduction gear RG and differential gear DEF correspond to power transmission gears to which torque from power split mechanism PSD is transmitted. However, the reduction gear RG and the differential gear DEF are not essential, and the present invention can be applied to a vehicle having a configuration without the reduction gear RG or a rear-wheel drive configuration in which the differential gear DEF is not integrated with the drive device. .

  Furthermore, the present invention can also be applied to a parallel hybrid that assists with a motor when the engine is accelerated, and can also be applied to a configuration in which only one motor is integrated with a driving device. .

[Reactor structure with high heat dissipation]
In the present embodiment, reactor L1, which is a component of the boost converter, needs to have a structure with high heat dissipation in order to ensure cooling performance in addition to the efficient arrangement in the integrated drive device described above. is there.

  FIG. 13 shows a first example of a reactor structure according to the embodiment of the present invention. FIG. 13A shows a plan view of the reactor L1, and FIG. 13B shows a side view of the reactor L1.

  A reactor L1 shown in FIGS. 13 (a) and 13 (b) includes a core 310 (hereinafter also referred to as a reactor core) on which heat dissipating fins 305 for securing a heat dissipating area are formed, and a coil wound around the core 310. 320. The reactor core 310 is formed of a laminated structure of magnetic plates. By bringing the radiating fins 305 into contact with a refrigerant having a temperature lower than that of the core 310, the heat generated by the core 310 can be released and the temperature rise of the reactor L1 can be suppressed.

  FIG. 14 is a plan view for explaining the shape of the magnetic plate 300 constituting the reactor core shown in FIGS. 13 (a) and 13 (b).

  Referring to FIG. 14, a magnetic plate 300 is formed into a predetermined shape by punching a plate-like magnetic body such as an electromagnetic steel plate with a press or the like. At this time, an uneven shape 305 # is provided in a part of the outer periphery of the magnetic plate 300.

  When the magnetic plates 300 are stacked, the radiating fins 305 shown in FIGS. 13A and 13B are configured by a set of the uneven shapes 305 #. Although it is possible to provide the radiating fins 305 on the entire surface of the reactor core 310, it is preferable not to form the radiating fins 305 in the region where the coil 320 is wound.

  That is, the region 306 in which the uneven shape 305 # shown in FIG. 14 is not formed is provided corresponding to the region around which the coil 320 is wound. Thus, the workability | operativity of coil winding work can be improved by not forming the radiation fin 305 in the site | part in which a coil is wound. In addition, the reactor structure can be reduced in size.

  FIG. 15 is a diagram illustrating a second example of a reactor structure. FIG. 15A is a front view of a reactor L1 according to the second example, and FIG. 15B is a side view.

  Referring to FIGS. 15A and 15B, in core 310, a heat radiation area is ensured by providing protrusion-like heat radiation fins 305 continuously on the surface. In the region 320 # of the core 310 where the coil is wound, the protruding heat dissipating fins 305 are not formed.

  The radiating fin 305 having such a shape can be realized by configuring the core 310 with a dust core (a dust core) obtained by compression molding metal magnetic powder (for example, fine magnetic particles mainly composed of molybdenum or the like). Become. The magnetic material for the dust core can be appropriately selected in consideration of required magnetic characteristics and cost. Alternatively, the dust core can be formed by mixing metal magnetic powder and resin and molding and thermosetting.

  16 and 17 show a third example of a reactor structure. FIG. 17 is a cross-sectional view taken along the line XVII-XVII in FIG.

  Referring to FIGS. 16 and 17, the core 310 has a projection-like heat dissipation similar to FIG. 15 in addition to the uneven heat dissipation fins 305 provided along the outer peripheral surface of the side as in FIG. By further providing fins 307 on the upper and lower surfaces, heat dissipation is improved.

  18 and 19 show a fourth example of a reactor structure. FIG. 19 is a cross-sectional view taken along line XIX-XIX in FIG.

  Referring to FIGS. 18 and 19, the core 310 is formed with an uneven shape for securing a heat radiation area by providing a groove 330 on the upper surface and the lower surface thereof. That is, the heat radiation fin 305 is formed by the region sandwiched between the grooves 330. Note that such heat radiation fins are not formed in region 320 # around which the coil is wound.

  Even with such a configuration, a reactor with high heat dissipation can be realized. By configuring the core 310 with a dust core like steam, the degree of freedom of the shape of the radiating fins increases, so that the high heat dissipation of the reactor core can be ensured.

  FIG. 20 is a diagram illustrating an example of a method for forming a reactor core using the dust core described in FIGS. 15 to 19.

  Referring to FIG. 20, magnetic particles (metal magnetic powder) 400 are enclosed in a region between fixed die 410 and punch 420 that is movable in the vertical direction in FIG. At this time, the die 410 and / or the punch 420 is provided with an uneven shape that matches the shape of the heat radiation fin 305. For example, in FIG. 20, the punch 420 is provided with a convex portion 430 for forming the groove 330 shown in FIG. By operating the punch 420 and compression-molding the magnetic particles 400 with such a die 410 and the punch 420, the reactor core 310 having the radiating fins 305 of any shape can be produced. In other words, the shape of the fin 305 provided in the reactor core 310 can be arbitrarily designed by the uneven shape provided in the die 410 and / or the punch 420.

  As described above, according to the embodiment of the present invention, a drive device in which the motor generator, the inverter for driving the motor generator and the boost converter are integrated is realized, and the integrated structure is efficient in a limited space. It is possible to improve the heat dissipation of the reactor tank arranged in the.

  In particular, in the drive device having the integrated structure, the heat capacity of the case that integrally accommodates motor generator MG2, the inverter that controls motor generator MG2, and the boost converter (voltage converter) is increased. For this reason, by configuring the cooling system so as to transfer heat between the refrigerant that contacts the radiator fins and the case, it is possible to suppress the temperature rise of the reactor and avoid the efficiency reduction of the boost converter. it can.

[Refrigerant supply configuration to Reactor]
Below, the refrigerant | coolant supply structure to the reactor core in the drive device by this Embodiment is demonstrated.

  Referring to FIG. 4 again, case 102 is further provided with an oil passage 210 for guiding cooling lubricant to reactor L1. The oil passage 210 guides the lubricating oil splashed by the counter driven gear 132 of FIG. 2 from the counter driven gear 132 side to the reactor L1 side.

  Further, referring to FIG. 6 again, a cross section of the oil passage 210 can be seen at the top of the rotating shaft 130. That is, in a drive unit in which motor generator MG2 and power control unit 21 (inverter and boost converter) are integrated and accommodated in a case, the lubricant of motor generator that contacts reactor L1 and the case (hereinafter, simply referred to as “lubricant”). As a heat transfer agent, the heat of the reactor L1 is radiated. The case is formed with a lubricating oil circulation path including the oil passage 210 as a part, and the reactor L1 is disposed on the circulation path. Hereinafter, the lubricating oil circulation path will be described in more detail.

  Referring to FIG. 8 again, an oil pan is provided under the stator of motor generators MG1, MG2. FIG. 8 shows an oil level LVS when the vehicle is stationary for a while when the vehicle is stopped, and an oil level LVD when the lubricating oil is lubricating each part during traveling.

  Further, referring again to FIG. 9, oil chamber 216 which is a first storage chamber for storing reactor L <b> 1 is partitioned from a space for storing other electronic members by lid 212. The lubricating oil flowing into the oil chamber 216 from the oil passage 210 cools the reactor L1, flows as shown by arrows F1, F2, F3, and F4, and is returned to the reduction gear RG side from the oil drain hole 214.

  FIG. 21 shows the direction in which the lubricating oil is lifted up by differential gear DEF and reduction gear RG.

  Referring to FIG. 21, the lubricating oil stored in the oil pan is splashed toward reduction gear RG according to the rotation of differential gear DEF as indicated by arrows F8 and F9. Further, the lubricating oil is further swept up as indicated by arrows F10 to F12 in accordance with the rotation of the reduction gear RG.

  Referring to FIG. 10 again, the lubricating oil that has been lifted up by the rotation of the reduction gear RG flows through the oil passage 210 and flows into the oil chamber 216 as indicated by arrows F5 and F6. To cool reactor L1. Further, the lubricating oil flows out from the oil drain hole 214 toward the space for accommodating the reduction gear RG as indicated by the arrow F7.

  If the diameter of the oil drain hole 214 is made small enough to serve as an orifice that restricts the flow rate, the reactor L1 can be kept immersed in the lubricating oil in a situation where the lubricating oil flows into the oil chamber 216. It is.

  In this embodiment, fluid lubricating oil is used to dissipate the heat of the reactor, but the reactor is immersed in the lubricating oil without providing an oil drain hole, and the reactor heat is used as a case. It may be communicated. As another example, for example, a structure may be adopted in which a gap between the reactor in the case and the case is filled with grease having low fluidity and the heat of the reactor is transmitted to the case to dissipate heat. In these cases, the lubricating oil or grease corresponds to a “heat transfer agent” that transfers heat from the reactor to the case.

  FIG. 22 shows a partial cross section taken along line XXII-XXII in FIG. Further, FIG. 23 shows a partial cross section taken along line XXIII-XXIII in FIG.

  Referring to FIGS. 22 and 23, the lubricating oil that has been lifted up by counter driven gear 132 of reduction gear RG is lifted up as shown by arrows F17, F18 and F14, F13. If this is configured to be received by the oil catch plate 224, a part of the oil that has been lifted up is effectively guided toward the oil chamber 216 in which the reactor L1 is accommodated, as indicated by arrows F15 and F16. be able to.

  The reactor L1 can be configured as shown in FIG.

  Referring to FIG. 24, reactor L1 is molded with an insulating resin as compared with the configuration shown in FIG. 20, and the upper end of this mold portion 225 has a flange shape that also serves as a lid for oil chamber 216. Is different. Although not shown, the insulating resin flange-shaped lid is provided with terminals for connecting the reactor to the bus bar. Since the other portions of reactor L1 have the same configuration as in FIG. 20, description thereof will not be repeated. By adopting such a configuration, the assembly of the reactor L1 becomes easy and the number of parts can be reduced.

[Modification]
In addition, the arrangement of the reactor, which is a component of the boost converter, may be modified as shown in FIG.

  FIG. 25 shows a cross-sectional view of a vehicle drive device for explaining a modification of the reactor arrangement.

  Referring to FIG. 25, in a modification of the reactor arrangement, reactor L1A is arranged in an oil pan below motor generator MG2. Then, as shown in FIG. 21, an oil path is provided in the partition wall 200 so that the lubricating oil that has been lifted up by the differential gear DEF and the reduction gear RG is dropped on the reactor L1A as indicated by arrows F19 and F20. Keep it. Thereby, the heat generated in reactor L1A is dissipated through the lubricating oil.

  If capacitor C2 interferes with reactor L1A or interferes with providing an oil path in partition wall 200, the capacitor may be moved to the portion where reactor was placed in the first embodiment. . For example, a capacitor C2A can be arranged instead of the capacitor C2.

  Also with the reactor arrangement shown in FIG. 25, a drive unit integrated with the boost converter and the inverter can be realized. And even if it integrates, the heat_generation | fever of the reactor of a boost converter can be thermally radiated favorably and the efficiency fall of a boost converter can be avoided.

Further, the lubricating oil circulation mechanism may be modified as shown in FIG.
The configuration shown in FIG. 26 is an oil pump that pumps lubricating oil from an oil reservoir and supplies it for cooling reactor L1 instead of the configuration in which the oil is pumped up by gears in the configuration shown in the embodiments described so far. It has.

  Referring to FIG. 26, in this example of the oil circulation path, a trochoid oil pump 400 is provided to pump up lubricating oil from the oil reservoir at the bottom of the case and send it to the oil passage 407. The outlet of the oil passage 407 is located upstream of the power control unit including the substrate 120 in the lubricating oil lubrication path.

  Oil pump 400 includes a drive gear 402 that meshes with differential gear DEF, an inner rotor 404 that has a shaft coupled to drive gear 402 and rotates together, and an outer rotor 406 that meshes with inner rotor 404 and inner teeth.

  The outlet of the oil passage 407 communicates with the oil passage 210 and the oil chamber 216 for guiding the cooling lubricating oil to the reactor L1. The lubricating oil flowing into the oil chamber 216 from the oil passage 210 cools the reactor L1, flows as shown by arrows F1, F2, F3, and F4, and is returned to the reduction gear RG side from the oil drain hole 214. Even when the lubricating oil is circulated by the modification shown in FIG. 26, the same reactor cooling effect as described above can be obtained.

  As described above, according to the embodiment of the present invention, a motor generator and an inverter for driving a motor generator and a drive device that integrally accommodates a boost converter are realized, and the integrated structure is limited. The heat dissipation of the reactor can be enhanced efficiently in the space. In addition, the cooling system is configured so that the refrigerant (heat transfer agent) that comes into contact with the radiator fin's radiating fins also comes into contact with the case having a large heat capacity for integrated housing, thereby suppressing the temperature rise of the reactor and the boost converter The reduction in efficiency can be avoided.

  In particular, by increasing the heat dissipation of the reactor core, the lubricant of the motor generator (rotary electric machine) is used as a refrigerant, that is, without newly providing a coolant for cooling the reactor core (for example, cooling water). It is possible to avoid an increase in the size of the reactor and suppress the temperature rise of the reactor.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a circuit diagram which shows the structure regarding the motor generator control of the hybrid vehicle which concerns on embodiment of this invention. It is a schematic diagram for demonstrating the detail of the motive power division mechanism PSD and the reduction gear RD in FIG. 1 is a perspective view showing an external appearance of a drive device 20 for a hybrid vehicle according to an embodiment of the present invention. FIG. 3 is a plan view of the drive device 20. It is the side view which looked at the drive device 20 from the X1 direction of FIG. It is sectional drawing in the VI-VI cross section of FIG. It is the side view which looked at the drive device 20 from the X2 direction of FIG. It is sectional drawing in VIII-VIII of FIG. It is the fragmentary sectional view which showed the partial cross section in IX-IX of FIG. It is sectional drawing which showed the XX cross section in FIG. It is the figure which showed the case outline and the components accommodated in an inside, when a case is projected from the rotating shaft direction. It is the figure which showed the case outline and the components accommodated in an inside, when a case is projected from the direction orthogonal to a rotating shaft direction and orthogonal to a perpendicular direction. It is a figure which shows the 1st example of the reactor structure according to embodiment of this invention. It is a top view explaining the shape of the magnetic body plate which comprises the reactor core shown in FIG. It is a figure which shows the 2nd example of the reactor structure according to embodiment of this invention. It is a figure which shows the 3rd example of the reactor structure according to embodiment of this invention. It is XVII-XVII sectional drawing of FIG. It is a figure which shows the 4th example of the reactor structure according to embodiment of this invention. It is XIX-XIX sectional drawing of FIG. It is a figure which shows an example of the formation method of the reactor core by the dust core demonstrated in FIGS. It is the figure which showed the direction where lubricating oil is lifted up by the differential gear DEF and the reduction gear RG. It is the fragmentary sectional view which showed the partial cross section in XXII-XXII of FIG. It is the fragmentary sectional view which showed the partial cross section in XXIII-XXIII of FIG. It is the figure which showed the modification of the reactor part. It is the figure which showed the cross section of the drive device of the vehicle for demonstrating the other example of reactor arrangement | positioning. It is a figure for demonstrating the modification of the circulation mechanism of lubricating oil.

Explanation of symbols

  4 Engine, 6, 8 Power cable, 10 Voltage sensor, 11, 24 Current sensor, 12 Boost converter, 13 Arm part, 14, 22 Inverter, 15 U phase arm, 16 V phase arm, 17 W phase arm, 20 Drive device , 21 Power control unit, 30 Control device, 31, 36 Stator, 32, 37 Rotor, 33, 38 Stator core, 34, 39 Three-phase coil, 40 Battery unit, 41, 42, 43, 44 Terminal, 50 Crankshaft, 51 , 62 Sun gear, 52 Ring gear, 53, 64 Pinion gear, 54, 66 Planetary carrier, 60 Shaft, 68 Ring gear, 70 Counter drive gear, 71, 72, 212 Lid, 73, 74, 75, 76, 77, 78 Ball bearing, 79,80 Needlebearing , 81 Oil seal, 100 hybrid vehicle, 102, 104 case, 105, 106 flange, 108, 109, 111 opening, 112 cooling water outlet, 114 cooling water inlet, 116, 118 terminal block, 120 power element board, 121 control board , 122 water channel, 124 damper, 128 bus bar, 130 rotating shaft, 132 counter driven gear, 133 final drive gear, 200, 202, 203 partition, 210, 407 oil passage, 214 oil drain hole, 216 oil chamber, 220, 222 ball bearing 224 Oil catch plate, 300 Magnetic plate, 305, 307 Heat radiation fin, 305 # Uneven shape, 310 Reactor, 320 Coil, 306, 320 # Coil winding area, 330 groove, 400 Magnetic Particle, 410 Die, 420 Punch, 430 Convex (Punch), B Battery, C2, C2A Capacitor, D1-D8 Diode, DEF Differential Gear, F1-F20 Lubricating Oil Path, L1, L1A Reactor, LVD Oil Level (During Traveling) ), LVS oil level (at rest), MG1, MG2 motor generator, PSD power split mechanism, Q1-Q8 IGBT element, R limiting resistor, RD reduction gear, RG reduction gear, SMR1-SMR3 system main relay.

Claims (11)

Rotating electrical machinery,
A power control unit for controlling the rotating electrical machine;
A case for housing the rotating electrical machine and the power control unit;
The power control unit is
An inverter that drives the rotating electrical machine;
A voltage converter configured to boost a power supply voltage and provide the inverter with a reactor,
The reactor is
A core having a heat radiating fin formed at least in a part thereof;
A coil wound around the core,
Further example Bei heat transfer agent in contact with the core and the casing,
The vehicle heat-transfer device, wherein the heat transfer agent is lubricating oil that lubricates and cools the rotating electrical machine. The core is composed of a plurality of laminated magnetic plates,
An uneven shape is provided in a part of the outer shape of each magnetic plate,
The vehicle drive device according to claim 1, wherein the radiating fin is formed by a set of the concavo-convex shapes stacked.   The vehicle drive device according to claim 1, wherein the core is configured by a powder magnetic core.   The vehicle drive device according to any one of claims 1 to 3, wherein the coil is wound around a portion where the radiating fin of the core is not formed. The drive unit of the previous Symbol vehicle,
Further comprising a lubricating oil circulation mechanism,
In the case, a circulation path of the lubricating oil by the circulation mechanism is formed,
4. The vehicle drive device according to claim 1, wherein the reactor is disposed on the circulation path such that the core contacts the lubricating oil and transfers heat. 5. The circulation mechanism is
A gear immersed in the lubricating oil and rotating in accordance with the rotation of the rotating electrical machine;
The vehicle drive device according to claim 5, further comprising an oil catch plate that receives the lubricating oil that is lifted by the gear. The case includes an oil pan disposed downstream on the circulation path,
6. The vehicle drive device according to claim 5, wherein the circulation mechanism includes a gear that lifts the lubricating oil from the oil pan in accordance with the rotation of the rotating electrical machine and sends the lubricating oil to an upstream portion of the reactor in the lubricating path. . The case includes a first storage chamber that stores the reactor,
The vehicle drive device according to claim 5, wherein the reactor is immersed in the lubricating oil in the first storage chamber. The case is
A second storage chamber for storing the rotating electrical machine;
A partition that partitions the first and second storage chambers;
The vehicle drive device according to claim 8, wherein the partition is provided with a hole that forms a part of the circulation path.   The vehicle drive device according to claim 8, wherein the first storage chamber is an oil pan that stores the lubricating oil. The vehicle is further equipped with an internal combustion engine,
The driving device includes:
A damper to which a crankshaft of the internal combustion engine is coupled;
A power transmission mechanism for combining the power generated by the rotating electrical machine with the power generated by the internal combustion engine and transmitting the power to the drive shaft;
11. The vehicle drive device according to claim 1, wherein the case is integrally configured to accommodate the damper, the rotating electrical machine, the power control unit, and the power transmission mechanism.

Images