Hitachi Astemo Ltd.

Hitachi Automotive Systems, Ltd.

Yoichiro Furuta

Yuta Numakura

Kenichirou Nakajima

Hiroki Funato

Isao Houda

A power conversion device including: a circuit board including a first ground constituting a ground of a first circuit and a second ground formed to be electrically separated from the first ground; a second circuit in which a joining portion is formed; a metal base plate provided between the second circuit and the circuit board and provided with an opening portion corresponding to the joining portion; and a housing that stores the circuit board, the second circuit, and the metal base plate and is electrically connected to the second ground of the circuit board and the metal base plate, in which the joining portion of the second circuit is disposed corresponding to the second ground via the opening portion of the metal base plate.

Power conversion device

Provided is a power conversion device capable of suppressing an increase in cost and an increase in size of the device. A control boardthat includes a connection unitto which a signal connectorwhich transmits a signal is connected, a base memberthat supports the control boardand has conductivity, and a casethat accommodates the control boardand the base memberand is connected to a ground is provided. The base memberincludes a supporting portionthat is connected to one surface of the control board, and a first extending portionof which one end is connected to the supporting portionand the other end extends to the caseto be connected to the case. An electronic componentthat generates noise is mounted on the control board, and the first extending portionand the supporting portionform an electrical path. The first extending portionis arranged at a position at which a distance between the first extending portion and the electronic componentis shorter than a distance between the connection unitand the electronic component

Provided is a power converter capable of being miniaturized while securing noise resistance and insulation between a power semiconductor module and a drive circuit board. The power converter according to the present invention includes a power semiconductor module that converts DC power into AC power, a driving signal circuit board that outputs a driving signal for driving the power semiconductor module, and a resin support member that supports the driving signal circuit board, in which the power semiconductor module has a signal terminal that transmits the driving signal and a main terminal that transmits an input of the DC power and an output of the AC power, the support member is disposed between the driving signal circuit board and the power semiconductor module, the signal terminal and the main terminal are provided on a side of the power semiconductor module that faces the support member, and a metal shielding plate is embedded in a region between the driving signal circuit board in the support member and the main terminal.

Growing community of inventors

Hitachinaka, Japan

Yoichiro Furuta