Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Yutaka Okubo

Kaname Sasaki

Youhei Nishizawa

Yuki Fujita

Hiroki Funato

Hiroyuki Saito

Yusaku Katsube

Fusanori Nishikimi

Satoru Shigeta

Isao Hoda

Aya Ohmae

Yuji Sobu

Akira Ishii

Kenichirou Nakajima

Hiroyuki Yamai

Ryuji Kurihara

Taesung Kim

A filter circuit device includes: first and second core members forming first and second through holes, respectively; a first conductor passing through the first and second through holes; a second conductor passing through the first and second through holes; a capacitor; a first terminal configured to electrically connect the first conductor with the capacitor; and a second terminal configured to electrically connect the second conductor with the capacitor. The first conductor from the first through hole to the second through hole and the second conductor from the first through hole to the second through hole have an opposing part between the first conductor and the second conductor. The first terminal presses an opposite surface of the first conductor, so as to be in contact with the first conductor. The second terminal presses an opposite surface of the second conductor, so as to be in contact with the second conductor.

Power converter including filter circuit device to improve a noise suppression function

Since inductance due to wiring to a Y capacitor is large, it is necessary to arrange the Y capacitor near a bus bar, and there is no degree of freedom in arranging the Y capacitor. Directions of currents flowing through a positive electrode side wiringand a negative electrode side wiringin a multi-core cableare a directionfrom a bus bar positive electrode terminaltoward the Y capacitor positive electrode terminal, and a directionfrom a bus bar negative electrode terminaltoward the Y capacitor negative electrode terminal, respectively. On the other hand, a direction of a current flowing through a ground wiringis a directionfrom a Y capacitor ground terminaltoward a ground terminal. A magnetic flux generated by the currents flowing through the positive electrode side wiringand the negative electrode side wiringin the multi-core cableand a magnetic flux generated by the current flowing through the ground wiringin the multi-core cablecancel each other out, and the inductance can be kept small.

Filter device and power converter

An object of the present invention is to improve the reliability of a power converter against electromagnetic noise. A power converter according to the present invention includes: a power semiconductor circuit unit; a DCDC converter circuit unit; a first drive circuit board that outputs a drive signal to the power semiconductor circuit unit; a second drive circuit board that outputs a drive signal to the DCDC converter circuit unit; and a control circuit board that outputs a first control signal for controlling the first drive circuit board and a second control signal for controlling the second drive circuit board, in which the control circuit board is arranged at a position facing the second drive circuit board with the power semiconductor circuit unit and the DCDC converter circuit unit interposed therebetween, the first drive circuit board is arranged to be substantially parallel to an array direction of the control circuit board and the second drive circuit board, and the first drive circuit board has a relay wiring that relays the second control signal output from the control circuit board to the second drive circuit board.

Power converter

There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit, a capacitorfor smoothing DC power, a capacitorfor removing noise, and conductorsand. The conductorsandare connected to the capacitorsandwhen power side terminalsandare connected to an inverter circuit, and power source side terminalsandare connected to a battery. In the conductorsand, a parasitic inductance Lbetween capacitor terminalsandand capacitor terminalsandis larger than a parasitic inductance Lbetween capacitor terminalsandand the power side terminalsand

An object of the invention is to provide a power conversion device which secures insulation and is miniaturized still more without being affected by electromagnetic noises. A power conversion device according to the invention includes a power semiconductor module which converts a DC current into an AC current and includes a DC positive terminal and a DC negative terminal, and a resin cover portion which includes an insulating portion disposed between the DC positive terminal and the DC negative terminal. The cover portion holds a metal member which covers the DC positive terminal and the DC negative terminal.

Power conversion device having a cover that covers DC positive and negative terminals

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Hitachinaka, Japan

Yutaka Okubo