Reduced size power inverter suitable for a vehicle

Patent metadata

Field	Value
Publication number	US-9654046-B2
Application number	US-201414266030-A
Country	US
Kind code	B2
Filing date	Apr 30, 2014
Priority date	Apr 6, 2006
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A power inverter comprises at least a box-shaped housing; and a power module, a smoothing capacitor, a base plate made of a flat plate, and a rotating electric machine control circuit board arranged in order in the housing. The base plate is arranged with the fringes fixed to the inner wall surfaces of the housing, and the smoothing capacitor and rotating electric machine control circuit board are fixed.

First claim

What is claimed is:

1. A power convertor comprising:
a power module including a power semiconductor for converting DC current to AC current;
a rotating electric machine control circuit board outputting timing signals for switching the power semiconductor;
a connector transmitting input signals to the rotating electric machine control circuit; and
a noise reduction board including a bypass capacitor for removing noise superimposed on each of the input signals;
wherein the noise reduction board is configured to be physically separated from the rotating electric machine control circuit board such that the noise reduction board is on a board different from the rotating electric machine control circuit board.

2. A power convertor comprising:
a power module including a power semiconductor for converting DC current to AC current;
a rotating electric machine control circuit board outputting timing signals for switching the power semiconductor;
a connector transmitting input signals to the rotating electric machine control circuit;
a noise reduction board including a bypass capacitor for removing noise superimposed on each of the input signals;
a housing for installing the rotating electric machine control circuit board and the noise reduction board; and
a support part supporting the connector;
wherein the noise reduction board is configured to be separated from the rotating electric machine control circuit board,
the connector protrudes outside the housing through an opening which is formed with the housing,
the connector is fixed to the housing through the support part, and
the noise reduction board is fixed to the support part.

3. The power convertor according to claim 1 , further comprising:
a switch drive circuit board which outputs a drive signal for controlling switching operation of the power semiconductor and is supported by the power module; and
a base member holding the rotating electric machine control circuit board.

4. The power convertor according to claim 2 , further comprising:
a switch drive circuit board which outputs a drive signal for controlling switching operation of the power semiconductor and is supported by the power module; and
a base member holding the rotating electric machine control circuit board;
wherein a concave portion facing to a wired area of the rotating electric machine control circuit board is formed with the base member.

Assignees

• Hitachi Ltd

Inventors

• Nakajima Kenichiro
• Hamada Haruki
• Suzuki Hideyo

Classifications

• B60W10/08

  including control of electric propulsion units, e.g. motors or generators · CPC title

• B60K1/02

  comprising more than one electric motor · CPC title

• B60K6/26 Primary

  characterised by the motors or the generators · CPC title

• H02P27/06 Primary

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• B60K2001/003

  with means for cooling the electrical propulsion units · CPC title