JP2009173119A - Vehicle drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving device for vehicle capable of reducing radio noise and being applicable to even a very cold region. <P>SOLUTION: This driving device for vehicle includes a rear motor generator 600, a motor case 602 storing the rear motor generator 600, an electric apparatus connected with the rear motor generator 600 to control driving of the rear motor generator 600, an internal combustion engine for generating power, an exhaust pipe 113 connected with the internal combustion engine to exhaust the exhaust gas from the internal combustion engine to the outside, and a connection member 320 connecting the motor case 602 with the exhaust pipe 113 to radiate electromagnetic waves from the electric apparatus transmitted to the motor case 602 to the exhaust pipe 113 and conducting electricity. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle drive device.

  2. Description of the Related Art Conventionally, a driving device having a high-frequency control device that controls driving of a motor is known. And the drive device by which the high frequency noise was suppressed from being radiated | emitted from this high frequency control apparatus was proposed conventionally.

  For example, in the vehicle motor drive device described in Japanese Patent Application Laid-Open No. 2006-320129, after the current is supplied to the rotor electromagnetic coil through the sliding contact and the lead wire, the current is returned to the ground through the lead wire and the sliding contact. Has been. During this time, the motor is driven by supplying current to the stator coil under the control of the inverter. In this vehicle motor drive device, the motor drive system is grounded to prevent high frequency noise from the inverter from being radiated using the motor drive system as an antenna.

  Further, in the motor drive circuit integrated electric compressor described in Japanese Patent Application Laid-Open No. 2006-27315, the motor housing is connected to the inverter circuit via a capacitor and grounded to the vehicle body via a shield wire. The For this reason, most of the current leaked to the motor housing flows into the inverter circuit, the common mode current flowing to the vehicle body is reduced, and the influence of the common mode current on the radio noise is reduced.

Furthermore, in the motor drive circuit integrated electric compressor described in Japanese Patent Application Laid-Open No. 2006-27315, a method of grounding the motor housing to the vehicle body using a dedicated ground wire is described.
JP 2006-320129 A JP 2006-273315 A

  However, in the conventional driving device, high frequency noise leaks into the motor case, and high frequency noise is generated from the motor case, which may cause radio noise.

  In addition, in the electric compressor integrated with a motor drive circuit described in Japanese Patent Application Laid-Open No. 2006-27315, a method for grounding the motor housing to the vehicle body using a dedicated ground wire is described. When this is used, in the extremely cold region, this ground wire is icing, and there is a risk of disconnection.

  The present invention has been made in view of the above-described problems, and an object of the present invention is a vehicle drive device in which radio noise is reduced, and the vehicle drive that can be applied even in extremely cold regions. Is to provide a device.

  A vehicle drive device according to the present invention includes a rotating electrical machine, a housing case in which the rotating electrical machine is housed, an electric device that is connected to the rotating electrical machine and controls driving of the rotating electrical machine, an internal combustion engine capable of generating power, Conductivity that is connected to the internal combustion engine and that exhausts exhaust gas from the internal combustion engine to the outside, and the housing case and the exhaust device are connected, and electromagnetic waves from the electrical equipment transmitted to the housing case can be emitted to the exhaust device Connecting member.

  Preferably, the vehicle drive device is mounted on a vehicle having an antenna capable of at least one of transmission and reception, further including front wheels and rear wheels, and the rotating electrical machine can generate power for driving the front wheels The front wheel rotating electrical machine and the rear wheel rotating electrical machine capable of generating power for driving the rear wheel and closer to the antenna than the front wheel rotating electrical machine are included. The rear wheel rotating electrical machine is housed in the rear wheel rotating electrical machine housing case, and the connecting member connects the rear wheel rotating electrical machine housing case and the exhaust device.

  Preferably, the internal combustion engine is disposed on the front wheel side relative to the rear wheel rotating electrical machine, and the exhaust device includes an exhaust pipe connected to the internal combustion engine and extending toward the rear of the vehicle body. And the said connection member connects the rotary electric machine for rear wheels, and an exhaust pipe. Preferably, the connection member is a metal material.

  According to the vehicle drive device of the present invention, it is possible to reduce radio noise and also apply it in an extremely cold region.

  A vehicle drive device according to an embodiment of the present invention and a vehicle equipped with the vehicle drive device will be described with reference to FIGS. 1 to 3.

  Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified. In addition, when there are a plurality of embodiments below, it is planned from the beginning to appropriately combine the features of each embodiment unless otherwise specified.

  FIG. 1 is a block diagram illustrating a configuration of a hybrid vehicle including a vehicle drive device according to an embodiment of the present invention.

  With reference to FIG. 1, a vehicle equipped with a drive system according to a first embodiment of the present invention will be described. The vehicle includes an engine (internal combustion engine) 100, a motor generator (front wheel rotating electrical machine) 200, an inverter (front wheel electrical device) 300, a battery (power storage device) 400, and a rear inverter (rear wheel electrical device). 500, a rear motor generator (rear wheel electric rotating machine) 600, an antenna 306, and an exhaust mechanism 115.

  The antenna 306 may be a receiving antenna such as a radio antenna or a transmitting antenna.

  The antenna 306 extends outward from the body of the hybrid vehicle, and is located closer to the rear wheel 606 than the front wheel 108.

  A fuel tank 110 is connected to the engine 100 via a pipeline 111, and liquid fuel such as gasoline is supplied to the engine 100.

  In engine 100, a mixture of fuel and air is burned to rotate a crankshaft (not shown) to generate a driving force. The exhaust mechanism 115 includes an exhaust manifold 112 connected to the engine 100, an exhaust pipe 113 connected to the exhaust manifold 112, and a muffler 114 provided at a terminal portion of the exhaust pipe 113. Exhaust gas generated in the engine 100 passes through an exhaust pipe 113 from an exhaust manifold 112 connected to the engine 100 and is discharged to the outside from a muffler 114. The exhaust gas exhausted from the engine 100 has a high temperature, and the exhaust manifold 112 and the exhaust pipe 113 are heated by the exhaust gas.

  The driving force generated by engine 100 is transmitted to at least one of CVT (Continuously Variable Transmission) 104 and motor generator 200 via power switching mechanism 102. The driving force transmitted to the CVT 104 is transmitted to the front wheel 108 via the drive shaft 106. As a result, the front wheel 108 is driven.

  Motor generator 200 is a three-phase AC rotating electric machine. The motor generator 200 is driven by the driving force of the engine 100 transmitted through the power switching mechanism 102 to generate power. Further, during regenerative braking of the vehicle, the motor generator 200 is driven by the front wheels 108 via the CVT 104 and the drive shaft 106 to generate electric power. The electric power generated by motor generator 200 is converted from AC power to DC power by inverter 300 and stored in battery 400.

  On the other hand, when the vehicle starts or accelerates, the electric power stored in battery 400 is supplied to motor generator 200 via inverter 300. As a result, the motor generator 200 generates a driving force. The driving force of the motor generator 200 is transmitted to the front wheels 108 via the power switching mechanism 102, the CVT 104, and the drive shaft 106 at the front of the vehicle. Thereby, motor generator 200 runs the vehicle or assists engine 100. The voltage may be adjusted by a converter to supply power to motor generator 200 or battery 400.

  The engine 100, the power switching mechanism 102, the CVT 104, the motor generator 200, the inverter 300, and the engine room in the front part of the vehicle are provided. Therefore, inverter 300 is provided not on the rear inverter 500 side but on the engine 100 side.

  The battery 400 is an assembled battery configured by connecting a plurality of battery modules in which a plurality of battery cells are integrated in series. Note that a capacitor may be used instead of the battery 400.

  The electric power stored in the battery 400 is stepped down by the DC / DC converter 402 and then supplied to the auxiliary battery. The electric power stored in the auxiliary battery is supplied to the auxiliary machinery of the vehicle. The battery 400 is provided, for example, below the rear seat of the vehicle or inside the trunk room at the rear of the vehicle.

  Rear inverter 500 converts electric power stored in battery 400 from direct current power to alternating current power, and supplies it to rear motor generator 600. On the other hand, during regenerative braking of the vehicle, AC power generated by rear motor generator 600 is converted to DC power and supplied to battery 400. The rear inverter 500 is provided, for example, below the rear seat of the vehicle or inside the trunk room at the rear of the vehicle. Therefore, rear inverter 500 is provided not on engine 100 side but on rear motor generator 600 side.

  Rear motor generator 600 is a three-phase AC rotating electric machine. Rear motor generator 600 is provided at the rear of the vehicle so as to be coupled to drive shaft 604 at the rear of the vehicle. When starting or accelerating the vehicle, the rear motor generator 600 is supplied with a DC current supplied from the battery 400 after being converted into an AC current by the rear inverter 500. As a result, rear motor generator 600 generates a driving force. The driving force of rear motor generator 600 is transmitted to rear wheel 606 via drive shaft 604. As a result, the vehicle travels by driving the rear wheels 606.

  On the other hand, at the time of regenerative braking of the vehicle, the rear motor generator 600 is driven by the rear wheels 606 via the drive shaft 604 to generate electric power. Electric power generated by rear motor generator 600 is converted from AC power to DC power by rear inverter 500 and stored in battery 400. It is noted that power may be supplied to rear motor generator 600 or battery 400 by adjusting the voltage with a converter. Rear motor generator 600 is arranged at a position closer to antenna 306 than motor generator 200.

  FIG. 2 is a circuit diagram showing the inverter and the rear inverter. As shown in FIG. 2, the inverter 300 includes six IGBTs (Insulated Gate Bipolar Transistors) 310 to 360 and 6 IGBTs connected in parallel to each IGBT so that current flows from the emitter side to the collector side of the IGBT. It includes six diodes 311 to 361 and six IGBT drive circuits 312 to 362 connected to the respective IGBTs and driving the IGBTs based on signals generated by the control circuit 370. In order to correspond to each phase (U phase, V phase, W phase), IGBT 310 and IGBT 320, IGBT 330 and IGBT 340, and IGBT 350 and IGBT 360 are connected in series, respectively. The inverter 300 converts AC power into DC power or converts DC power into AC power by turning on / off each IGBT.

  A capacitor 900 is connected in parallel with the rear inverter 500 between the rear inverter 500 and the battery 400. Capacitor 900 smoothes the electric power between rear inverter 500 and battery 400.

  As with inverter 300, rear inverter 500 includes six IGBTs 510 to 560, six diodes 511 to 561 connected in parallel to each IGBT so that current flows from the emitter side to the collector side of the IGBT, Six IGBT drive circuits 512 to 562 that are connected to the IGBTs and drive the IGBTs based on signals generated by the control circuit 570 are included. In order to correspond to each phase (U phase, V phase, W phase), IGBT 510 and IGBT 520, IGBT 530 and IGBT 540, and IGBT 550 and IGBT 560 are connected in series, respectively. The rear inverter 500 converts AC power into DC power or converts DC power into AC power by turning on / off each IGBT.

  The control circuit 370 and the control circuit 570 calculate each IGBT on / off ratio (duty ratio) based on the depression amount of an accelerator pedal (not shown), the opening degree of a throttle (not shown), and the like. The IGBT is driven with the set duty ratio.

  FIG. 3 is a side view showing the configuration of the motor case 602 and the vicinity thereof. As shown in FIG. 3, the rear motor generator 600 is housed in a motor case 602, and a high voltage cable 605 connected to the rear inverter 500 shown in FIG. 2 is connected to the motor case 602. .

  The high-voltage cable 605 is connected to each phase coil (U-phase coil, V-phase coil, W-phase coil) of the rear motor generator 600 and has a wiring connected to the rear inverter 500 provided therein. .

  Rear motor generator 600 is driven by electric power supplied from high voltage cable 605.

  The motor case 602 is provided with a connection member 320 connected to the exhaust pipe 113 arranged below the motor case 602. The connection member 320 is made of a metal material, and is preferably made of copper or the like.

  In the rear inverter 500 shown in FIG. 1, high-frequency electromagnetic waves generated by driving capacitors and IGBTs are transmitted to the motor case 602 via the high-voltage cable 605. Here, the electromagnetic waves generated when the rear inverter 500 is driven are, for example, about 500 KHz to 1700 KHz. The frequency of this electromagnetic wave is higher than, for example, gear noise (500 Hz to 7 KHz) generated when the power switching mechanism 102 or the like is driven. Furthermore, a frequency higher than the switching noise (3 KHz to 10 KHz) generated in the rear inverter 500 due to deformation of electrical components such as a capacitor when converting a DC current into an AC current or converting an AC current into a DC current. It has become.

  The high-frequency electromagnetic wave transmitted to the motor case 602 is radiated to the exhaust pipe 113 through the connection member 320 and grounded through the exhaust pipe 113.

  For this reason, it can suppress that the motor case 602 radiates | emits electromagnetic waves, and can suppress that the electromagnetic waves emitted from the motor case 602 are received by the antenna 306 shown in FIG. For this reason, for example, when the antenna 306 is a radio antenna, it is possible to suppress adverse effects such as noise when receiving radio.

  In particular, the motor case 602 is disposed in the vicinity of the antenna 306 shown in FIG. 1, and the electromagnetic wave is radiated from the motor case 602, thereby suppressing the antenna 306 from receiving the electromagnetic wave. Radio noise can be reduced. The connecting member 320 is disposed under the floor panel and exposed to the external environment.

  High-temperature exhaust gas circulates in the exhaust pipe 113, and the exhaust pipe 113 has a high temperature. The connection member 320 is heated by the exhaust pipe 113. For this reason, even if the hybrid vehicle travels in an extremely cold region, there is no risk of icing on the connection member 320, and the connection member 320 is prevented from breaking. In particular, since the connection member 320 is made of a metal material such as copper, heat from the exhaust pipe 113 is transmitted to the connection member 320 well, and icing of the connection member 320 can be suppressed well.

  Here, the exhaust pipe 113 is disposed below the motor case 602. The exhaust pipe 113 is positioned on the front side of the vehicle with respect to the motor case 602, and is positioned on the rear side of the vehicle with respect to the front exhaust pipe 115, below the motor case 602, An inclined pipe that inclines so as to approach the motor case 602, and a rear pipe 117 positioned on the vehicle rear side with respect to the inclined pipe.

  The connection member 320 is connected to the inclined pipe 116. Since the inclined pipe 116 is close to the motor case 602, the length of the connecting member 320 can be shortened, and even if the connecting member 320 vibrates, the connecting member 320 is broken or dropped. Can be suppressed. Further, the manufacturing cost can be reduced by shortening the connecting member 320. In particular, by shortening the connection member 320, the connection member 320 itself can be prevented from functioning as an antenna. In the example shown in FIG. 3, the connecting member 320 is formed in a rod shape, but is not limited to this shape. For example, the heat from the exhaust pipe 113 may be favorably absorbed by forming the width on the exhaust pipe 113 side wider than the width on the motor case 602 side. Furthermore, in the example shown in FIG. 3, the connecting member 320 is provided at one place, but a plurality of connecting members 320 may be provided. Further, when a plurality of connection members 320 are provided, the connection members 320 are commonly connected via a copper bar or the like.

  Although the embodiment of the present invention has been described above, it should be considered that the embodiment disclosed this time is illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. Furthermore, the above numerical values are examples, and are not limited to the above numerical values and ranges.

  The present invention can be applied to a drive device mounted on a vehicle, and is particularly suitable for a drive device of a hybrid vehicle or an electric vehicle.

It is a block diagram which shows the structure of the hybrid vehicle provided with the vehicle drive device which concerns on embodiment of this invention. It is a circuit diagram which shows an inverter and a rear inverter. It is a side view which shows the structure of a motor case and its vicinity.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 Engine, 102 Power switching mechanism, 106,604 Drive shaft, 108 Front wheel, 110 Fuel tank, 111 Pipe line, 112 Exhaust manifold, 113 Exhaust pipe, 114 Muffler, 115 Front exhaust pipe, 116 Inclined pipe, 117 Rear pipe, 200 Motor generator, 300 inverter, 306 antenna, 311 diode, 312, 512 drive circuit, 320 connecting member, 370, 570 control circuit, 400 battery, 402 converter, 404 auxiliary battery, 500 rear inverter, 511 diode, 600 rear motor generator 602 Motor case 605 High voltage cable 606 Rear wheel 900 Capacitor.

Claims (4)

Rotating electrical machinery,
A housing case in which the rotating electrical machine is housed;
An electric device connected to the rotating electrical machine and controlling the driving of the rotating electrical machine;
An internal combustion engine capable of generating power;
An exhaust device connected to the internal combustion engine and exhausting exhaust gas from the internal combustion engine to the outside;
Connecting the housing case and the exhaust device, and a conductive connection member capable of radiating electromagnetic waves from the electrical device transmitted to the housing case to the exhaust device;
A vehicle drive device comprising: A vehicle drive device mounted on a vehicle having an antenna capable of at least one of transmission and reception,
Further comprising front and rear wheels,
The rotating electrical machine includes a front wheel rotating electrical machine capable of generating power for driving the front wheel, and a rear wheel electrical motor capable of generating power for driving a rear wheel, which is closer to the antenna than the front wheel rotating electrical machine. Including rotating electrical machinery,
The rear wheel rotating electrical machine is housed in a rear wheel rotating electrical machine housing case,
The vehicle drive device according to claim 1, wherein the connection member connects the rear wheel rotating electrical machine housing case and the exhaust device. The internal combustion engine is disposed on the front wheel side of the rear wheel rotating electrical machine,
The exhaust device includes an exhaust pipe connected to the internal combustion engine and extending toward the rear of the vehicle body,
The vehicle drive device according to claim 2, wherein the connection member connects the rear wheel rotating electrical machine and the exhaust pipe.   The vehicle drive device according to any one of claims 1 to 3, wherein the connection member is made of a metal material.

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