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Power conversion device

A technology of power conversion devices and capacitors, which is applied in the direction of output power conversion devices, structural components of conversion equipment, charging stations, etc., and can solve the problems of large-scale power conversion devices

Active Publication Date: 2020-02-04
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem of increasing the size of the power conversion device due to the increase in volume

Method used

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Embodiment 1

[0027] First, the structure will be described.

[0028] The power conversion device in Embodiment 1 is applied to an inverter device (an example of a power conversion device) of a motor generator mounted on an electric vehicle (an example of an electric vehicle) as a drive source for traveling or the like. Hereinafter, the configuration of the first embodiment will be described by dividing it into "circuit configuration of the driving system", "configuration of the inverter device" and "configuration of main parts".

[0029] [Circuit structure of drive system]

[0030] figure 1 A circuit diagram of a drive system of an electric vehicle to which the inverter device of the first embodiment is applied is shown. Below, based on figure 1 The circuit configuration of the driving system of the first embodiment will be described.

[0031] The drive system 1A includes a DC power supply 2 (high-power battery), an inverter device 3A, and a motor generator 11 .

[0032] The DC powe...

Embodiment 2

[0113] Embodiment 2 is an example in which two power modules are electrically connected to one smoothing capacitor, and two capacitor fixing points arranged on a diagonal line among capacitor fixing points are used as bus bar fixing points.

[0114] First, the structure will be described.

[0115] The power conversion device in Embodiment 2 is applied to an inverter device (an example of a power conversion device) of a motor generator mounted on a range-extended electric vehicle (an example of an electric vehicle) as a driving source for traveling or the like. An extended-range electric vehicle (EV) has two motor generators and an engine dedicated to power generation. The range-extended electric vehicle uses one of the two motor generators for driving and the other for power generation. In addition, electric power is generated by the regenerative operation of the motor generator for driving and the motor generator for power generation using the engine as a power source. In a...

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Abstract

Provided is a power conversion device reduced in size. The power conversion device is provided with a case (30), a power module (4), a smoothing capacitor (5), and a high-voltage connection portion (8). The power module (4) is housed in the case (30). The smoothing capacitor (5) is fixed to the case (30) with a capacitor fixing bolt (54) and suppresses voltage variation. The high-voltage connection portion (8) electrically connects the power module (4) and the smoothing capacitor (5) to each other. When a position where the smoothing capacitor (5) is fixed to the case (30) with the capacitor fixing bolt (54) is defined as a capacitor fixing point (9C), the capacitor fixing point (9C) is disposed at a position avoiding a corner (5a) of the smoothing capacitor (5). The power module (4) and the smoothing capacitor (5) are approached to each other in the high-voltage connection portion (8).

Description

technical field [0001] The present disclosure relates to a power conversion device. Background technique [0002] Conventionally, in a power conversion device, a semiconductor module and a capacitor are arranged adjacent to each other. The capacitor has a square shape and is fixed to the case of the power conversion device with bolts. Bolts are fastened to four corners of the capacitor (for example, refer to Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Unexamined Patent Publication No. 2013-9581 Contents of the invention [0006] The problem to be solved by the invention [0007] However, in the conventional power conversion device, the four corners of the capacitor serve as capacitor fixing points for bolting, so it is necessary to provide a space for tools between the semiconductor module and the capacitor. Therefore, there is a problem that the size of the power conversion device increases du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48
CPCH02M7/003Y02T10/70Y02T10/7072Y02T90/14H05K7/14329H02M1/14H02M7/44H02M7/48B60L53/20B60L50/64H02M7/5387H02P27/06H05K7/1432
Inventor 阿部圭太
Owner NISSAN MOTOR CO LTD