JP2009064802A - Electric apparatus support structure and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric apparatus support structure for suppressing the transmission of vibration transmitted to a casing from a capacitor element to a vehicle body, and to provide a vehicle including this structure. <P>SOLUTION: An electric apparatus support structure includes a PCU 700 having a cylindrical capacitor element and a casing 760 for housing the capacitor element, and a support member 770 for supporting the casing 760 from an axis direction (an arrow DR1 direction) of the capacitor element. In other words, the support member 770 supports the casing 760 in such a manner that a side surface 761 opposed to a periphery surface of the capacitor element in the casing 760 is opened. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a support structure for an electric device and a vehicle, and more particularly to a support structure for an electric device including a capacitor module having a cylindrical capacitor element and a vehicle including the structure.

  Japanese Patent Application Laid-Open No. 2004-215355 (Patent Document 1) discloses an electric drive device in which a control unit portion of a drive device including an electric motor is attached to and integrated with the drive device. It is described that it is movably supported.

  Japanese Patent Laying-Open No. 2001-119961 (Patent Document 2) describes that in an inverter-integrated vehicle drive device, a smoothing capacitor is held in the strongest axial direction in terms of strength.

  Japanese Patent Laid-Open No. 2002-222917 (Patent Document 3) describes that a noise filter is configured by providing a bus plate between an inverter module and a smoothing capacitor.

  Japanese Patent Laid-Open No. 9-308265 (Patent Document 4) discloses that a control circuit board is attached to an input conductor plate via a fixed terminal block, thereby improving durability of the control circuit board against vibrations of an automobile. Are listed.

Japanese Patent Laying-Open No. 2005-124346 (Patent Document 5) generates a radiation noise caused by a high-frequency current by providing a high-frequency reactor that suppresses the flow of a high-frequency current between the high-frequency generator and the vehicle body. The motor drive unit for motor vehicles which can suppress is described.
JP 2004-215355 A JP 2001-119916 A JP 2002-2222917 A JP-A-9-308265 JP 2005-124346 A

  When an electric device including a capacitor element is operated, the capacitor element may expand and contract. The expansion and contraction of the capacitor element is transmitted as vibration to the casing that houses the capacitor element. Therefore, depending on the support structure of the casing, the vibration is transmitted to the vehicle body, which causes noise in the passenger compartment.

  Patent Documents 1 to 5 do not describe a configuration that can sufficiently solve the above problems. For example, Patent Document 1 is only intended to improve the earthquake resistance of the control unit, and the idea of suppressing the vibration of the case housing the smoothing capacitor from being transmitted to the vehicle body is also suggested. It has not been done. Patent Document 2 only supports the smoothing capacitor from its axial direction, and does not describe the details of the support structure of the case in which the capacitor is stored.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an electric device capable of suppressing the vibration transmitted from the capacitor element to the casing from being transmitted to the vehicle body. And a vehicle including the structure.

  In one aspect, a support structure for an electric device according to the present invention is a support structure for an electric device mounted on a vehicle, and includes an electric device including a cylindrical capacitor element and a casing that houses the capacitor element, and a capacitor. And a support member that supports the casing from the axial direction of the element.

  In another aspect, the electrical equipment support structure according to the present invention is an electrical equipment support structure mounted on a vehicle, the electrical equipment including a cylindrical capacitor element and a casing that houses the capacitor element, and the casing. And a support member that supports the casing so as to open a side surface facing the outer peripheral surface of the capacitor element.

  According to the said structure, it can suppress that the vibration transmitted to the casing from the capacitor | condenser element is transmitted to a vehicle main body.

  In one embodiment, the electrical device is a control device that drives a vehicle or controls a rotating electrical machine that is driven by the vehicle.

  In one embodiment of the support structure of the electric device, a plurality of capacitor elements are housed in the casing.

  In one embodiment, the electrical device includes a capacitor module having a plurality of capacitor elements, a semiconductor module electrically connected to the capacitor module, and a control device that controls the semiconductor module. The capacitor module, the semiconductor module, and the control device are stacked in the axial direction of the capacitor element.

  The vehicle according to the present invention includes the above-described electric equipment support structure. As a result, a vehicle is provided in which vibration caused by the capacitor element is suppressed from being transmitted to the vehicle body.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the vibration transmitted to the casing which accommodates this capacitor | condenser element from the capacitor | condenser element contained in the electric equipment mounted in a vehicle is transmitted to a vehicle main body.

  Embodiments of the present invention will be described below. Note that the same or corresponding parts are denoted by the same reference numerals, and the description thereof may not be repeated.

  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 configurations of the embodiments unless otherwise specified.

  1 and 2 are schematic views showing the configuration of a hybrid vehicle having a support structure for an electric device according to one embodiment of the present invention. 2 shows a state seen from the direction of arrow II in FIG.

  Referring to FIGS. 1 and 2, hybrid vehicle 1 includes an engine 100, a motor generator 200, a power split mechanism 300, a differential mechanism 400, a drive shaft 500, and drive wheels 600L and 600R which are front wheels. A PCU (Power Control Unit) 700, cables 800 (800A, 800B), and a battery 900 are included.

  As shown in FIG. 2, engine 100, motor generator 200, power split mechanism 300, and PCU 700 are arranged in engine room 2. Motor generator 200 and PCU 700 are connected by a cable 800A. PCU 700 and battery 900 are connected by a cable 800B. A power output device including engine 100 and motor generator 200 is connected to differential mechanism 400 through power split mechanism 300. Differential mechanism 400 is coupled to drive wheels 600L and 600R via drive shaft 500.

  Motor generator 200 is a three-phase AC synchronous motor generator, and generates driving force by AC power received from PCU 700. Motor generator 200 is also used as a generator when the hybrid vehicle 1 decelerates, etc., generates AC power by its power generation action (regenerative power generation), and outputs the generated AC power to PCU 700.

  PCU 700 converts the DC voltage received from battery 900 into an AC voltage, and drives and controls motor generator 200. PCU 700 charges battery 900 by converting the AC voltage generated by motor generator 200 into a DC voltage.

Power split device 300 includes, for example, a planetary gear (not shown).
The power output from engine 100 and / or motor generator 200 is transmitted from power split mechanism 300 to drive shaft 500 via differential mechanism 400. The driving force transmitted to the drive shaft 500 is transmitted as a rotational force to the drive wheels 600L and 600R to cause the vehicle to travel. Thus, motor generator 200 operates as an electric motor.

  On the other hand, when the vehicle is decelerated, the motor generator 200 is driven by the drive wheels 600L and 600R or the engine 100. At this time, the motor generator 200 operates as a generator. The electric power generated by motor generator 200 is stored in battery 900 via an inverter in PCU 700.

  FIG. 3 is a circuit diagram showing a configuration of a main part of PCU 700. Referring to FIG. 3, PCU 700 includes a capacitor module 710 including capacitors 711 and 712, a power module 720 including a converter 721 and an inverter 722, a control device 730, power supply lines PL1 to PL3, an output line 740U, 740V and 740W. Converter 721 is connected between battery 900 and inverter 722, and inverter 722 is connected to motor generator 200 via output lines 740U, 740V, and 740W.

  Battery 900 connected to converter 721 is, for example, a secondary battery such as nickel metal hydride or lithium ion. Battery 900 supplies the generated DC voltage to converter 721 and is charged by the DC voltage received from converter 721.

  Converter 721 includes power transistors Q1 and Q2, diodes D1 and D2, and a reactor L. Power transistors Q1, Q2 are connected in series between power supply lines PL2, PL3, and receive a control signal from control device 730 as a base. Diodes D1 and D2 are connected between the collector and emitter of power transistors Q1 and Q2, respectively, so that current flows from the emitter side to the collector side of power transistors Q1 and Q2. Reactor L has one end connected to power supply line PL1 connected to the positive electrode of battery 900, and the other end connected to a connection point of power transistors Q1 and Q2.

  Converter 721 boosts the DC voltage received from battery 900 using reactor L, and supplies the boosted voltage to power supply line PL2. Converter 721 steps down the DC voltage received from inverter 722 and charges battery 900.

  Inverter 722 includes a U-phase arm 750U, a V-phase arm 750V, and a W-phase arm 750W. Each phase arm is connected in parallel between power supply lines PL2 and PL3. U-phase arm 750U includes power transistors Q3 and Q4 connected in series, V-phase arm 750V includes power transistors Q5 and Q6 connected in series, and W-phase arm 750W includes power transistors connected in series. Transistors Q7 and Q8 are included. Diodes D3 to D8 are respectively connected between the collector and emitter of power transistors Q3 to Q8 so that current flows from the emitter side to the collector side of power transistors Q3 to Q8. A connection point of each power transistor in each phase arm is connected to an anti-neutral point side of each phase coil of motor generator 200 via output lines 740U, 740V, and 740W.

  Inverter 722 converts a DC voltage received from power supply line PL <b> 2 into an AC voltage based on a control signal from control device 730 and outputs the AC voltage to motor generator 200. Inverter 722 rectifies the AC voltage generated by motor generator 200 into a DC voltage and supplies it to power supply line PL2.

  Capacitor 711 is connected between power supply lines PL1 and PL3, and smoothes the voltage level of power supply line PL1. Capacitor 712 is connected between power supply lines PL2 and PL3, and smoothes the voltage level of power supply line PL2.

  Control device 730 calculates each phase coil voltage of motor generator 200 based on the motor torque command value, each phase current value of motor generator 200, and the input voltage of inverter 722, and power transistors Q3-3 based on the calculation result. A PWM (Pulse Width Modulation) signal for turning on / off Q8 is generated and output to inverter 722.

  Further, control device 730 calculates the duty ratio of power transistors Q1 and Q2 for optimizing the input voltage of inverter 722 based on the motor torque command value and the motor rotation speed described above, and power based on the calculation result. A PWM signal for turning on / off the transistors Q1 and Q2 is generated and output to the converter 721.

  Further, control device 730 controls switching operations of power transistors Q <b> 1 to Q <b> 8 in converter 721 and inverter 722 to convert AC power generated by motor generator 200 into DC power to charge battery 900.

  In PCU 700, converter 721 boosts a DC voltage received from battery 900 based on a control signal from control device 730, and supplies the boosted voltage to power supply line PL2. Inverter 722 receives the DC voltage smoothed by capacitor 712 from power supply line PL 2, converts the received DC voltage into an AC voltage, and outputs the AC voltage to motor generator 200.

  Inverter 722 converts the AC voltage generated by the regenerative operation of motor generator 200 into a DC voltage and outputs the DC voltage to power supply line PL2. Converter 721 receives the DC voltage smoothed by capacitor 712 from power supply line PL2, and steps down the received DC voltage to charge battery 900.

  FIG. 4 is a perspective view showing the structure of PCU 700. Referring to FIG. 4, PCU 700 has a structure in which a capacitor module 710 including capacitors 711 and 712, a power module 720 including a converter 721 and an inverter 722, and a control device 730 are stacked in the direction of arrow DR1. The capacitor module 710 is accommodated in the casing 760.

  FIG. 5 is a perspective view showing a structure of a capacitor module 710 included in PCU 700. Referring to FIG. 5, capacitor module 710 includes a plurality of capacitor elements 710 </ b> A housed in casing 760. Capacitor element 710A is a film capacitor whose axial direction is the direction of arrow DR1.

  FIG. 6 is a view for explaining the structure of the film capacitor included in the capacitor module 710. Referring to FIG. 6, capacitor element 710A includes two films 710A1. A metal vapor deposition part 710A2 and a non-vapor deposition part 710A3 are formed on the film 710A1. Non-deposition part 710A3 is formed in the edge part of the width direction (equivalent to arrow DR1 direction) of film 710A1. Then, the two films 710A1 are overlapped so that the non-deposition portions 710A3 are located on the opposite sides, and these are wound. As a result, a capacitor element 710A having a cylindrical shape is formed.

  Next, a mechanism for generating noise by deformation of the film capacitor will be described with reference to FIGS. As shown in FIG. 7, during the operation of the PCU 700, the capacitor element 710A repeats expansion (see FIG. 7A) and contraction (see FIG. 7B) by the switching operation of the power module 720. Then, as shown in FIG. 8, the side surface 761 of the casing 760 that houses the capacitor element 710A vibrates due to the expansion / contraction described above. The vibration transmitted to the casing 760 reaches the passenger compartment, resulting in noise that can be heard by the driver.

  FIG. 9 is a diagram illustrating a support structure of an electric device according to a comparative example. Referring to FIG. 9, in the support structure according to this comparative example, casing 760 that houses capacitor module 710, power module 720, and control device 730 of PCU 700 is supported by support member 770. More specifically, one side surface 761 of the casing 760 is supported by the support member 771 via the support members 772 and 773, and the other side surface 761 of the casing 760 is supported by the support member 771 via the support members 774 and 775. Supported by. That is, in this comparative example, the PCU 700 is supported so as to be sandwiched from the side of the casing 760. In other words, in this comparative example, PCU 700 is sandwiched from a direction orthogonal to the axial direction (direction of arrow DR1) of capacitor element 710A. In such a structure, the vibration transmitted from capacitor element 710A to side surface 761 of casing 760 is transmitted to the vehicle main body via support member 770 (arrow DR740).

  FIG. 10 is a diagram showing a support structure for an electrical device according to the present embodiment. Referring to FIG. 10, also in the support structure according to the present embodiment, casing 760 accommodating capacitor module 710, power module 720, and control device 730 of PCU 700 is supported by support member 770, as in the example of FIG. 9. ing. On the other hand, the structure shown in FIG. 10 does not support the side surface 761 of the casing 760 but supports the upper surface and the bottom surface of the casing 760. More specifically, the bottom surface of the casing 760 is supported by the support member 771 via the support members 772 and 773, and the top surface of the casing 760 is supported by the support member 771 via the support members 774 and 775. That is, in the present embodiment, PCU 700 is supported so as to be sandwiched from the vertical direction of casing 760. In other words, in this embodiment, PCU 700 is sandwiched from the axial direction (direction of arrow DR1) of capacitor element 710A. In such a structure, since the side surface 761 of the casing 760 is in an open state, vibration transmitted from the capacitor element 710A to the side surface 761 of the casing 760 is prevented from being transmitted to the vehicle body via the support member 770. can do.

  FIG. 11 is a diagram showing a modified example of the support structure for the electric device according to the present embodiment. Referring to FIG. 11, the support structure according to this modification is characterized in that PCU 700 is supported only from below. More specifically, the bottom surface of the casing 760 is supported by the support member 771 via the support members 772 and 773. Even in such a structure, as in the example of FIG. 10, the side surface 761 of the casing 760 is in an open state, so that vibration transmitted from the capacitor element 710 </ b> A to the side surface 761 of the casing 760 is transmitted via the support member 770. Transmission to the vehicle body can be suppressed.

  The above contents are summarized as follows. That is, the support structure of the electric device according to the present embodiment includes a PCU 700 as an “electric device” including a cylindrical capacitor element 710A and a casing 760 that houses the capacitor element 710A, and an axial direction (arrow) of the capacitor element 710A. And a support member 770 that supports the casing 760 from the DR1 direction). In other words, the support member 770 supports the casing 760 so as to open the side surface 761 facing the outer peripheral surface of the capacitor element 710 </ b> A in the casing 760.

  In the present embodiment, PCU 700 is a control device that drives a vehicle or controls motor generator 200 as a “rotary electric machine” driven by the vehicle.

  More specifically, the PCU 700 includes a capacitor module 710 having a plurality of capacitor elements 710A, a power module 720 as a “semiconductor module” electrically connected to the capacitor module 710, and a control device that controls the power module 720. 730. Capacitor module 710, power module 720, and control device 730 are stacked in the axial direction (arrow DR1 direction) of capacitor element 710A.

  Although the embodiments of the present invention have been described above, the embodiments 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, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is the schematic which shows the structure of the hybrid vehicle to which the support structure of the electric equipment which concerns on one embodiment of this invention is applied. It is the schematic which shows the structure of the hybrid vehicle seen from the direction of arrow II in FIG. It is a circuit diagram which shows the structure of the principal part of PCU shown by FIG. 1, FIG. It is a perspective view which shows the structure of PCU shown by FIG. 1, FIG. It is a perspective view which shows the structure of the capacitor | condenser module contained in PCU shown by FIG. It is a figure explaining the structure of the film capacitor contained in the capacitor | condenser module shown by FIG. It is a figure for demonstrating the deformation | transformation of a film capacitor. It is a figure for demonstrating the mechanism in which a noise generate | occur | produces by deformation | transformation of a film capacitor. It is a figure which shows the support structure of the electric equipment which concerns on a comparative example. It is a figure which shows the support structure of the electric equipment which concerns on one embodiment of this invention. It is a figure which shows the modification of the support structure of the electric equipment which concerns on one embodiment of this invention.

Explanation of symbols

  1 hybrid vehicle, 2 engine room, 100 engine, 200 motor generator, 300 power split mechanism, 400 differential mechanism, 500 drive shaft, 600L, 600R drive wheel, 700 PCU, 710, 711, 712 capacitor, 710A capacitor element, 710A1 film , 710A2 Metal evaporation part, 710A3 Non-evaporation part, 720 Power module, 721 Converter, 722 Inverter, 730 Controller, 740U, 740V, 740W Output line, 750U U-phase arm, 750V V-phase arm, 750W W-phase arm, 760 Casing , 761 side surface, 770, 771, 772, 773, 774, 775 support member, 800, 800A, 800B cable, 900 battery, D ~D8 diodes, L reactor, PL1, PL2, PL3 power line, Q1 to Q8 power transistor.

Claims (6)

A support structure for an electric device mounted on a vehicle,
An electric device including a cylindrical capacitor element and a casing for storing the capacitor element;
A support structure for an electric device, comprising: a support member that supports the casing from an axial direction of the capacitor element. A support structure for an electric device mounted on a vehicle,
An electric device including a cylindrical capacitor element and a casing for storing the capacitor element;
A support structure for an electrical device, comprising: a support member that supports the casing so as to open a side surface facing the outer peripheral surface of the capacitor element in the casing.   The electric device support structure according to claim 1, wherein the electric device is a control device that drives a vehicle or controls a rotating electrical machine driven by the vehicle.   The electric device support structure according to any one of claims 1 to 3, wherein a plurality of the capacitor elements are housed in the casing. The electrical device further includes a capacitor module having a plurality of the capacitor elements, a semiconductor module electrically connected to the capacitor module, and a control device for controlling the semiconductor module,
5. The electrical equipment support structure according to claim 1, wherein the capacitor module, the semiconductor module, and the control device are stacked in an axial direction of the capacitor element. 6.   A vehicle comprising the support structure for an electric device according to any one of claims 1 to 5.

Images