Hitachi Automotive Systems, Ltd.

Yuki Fujita

Kaname Sasaki

Youhei Nishizawa

Yutaka Okubo

Masayoshi Takahashi

Hiroki Funato

Kenichiro Nakajima

Keisuke Fukumasu

Takeshi Kato

Kenichirou Nakajima

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

Power converter

A power conversion device includes: a metal housing; a power semiconductor module that is contained in the metal housing and converts direct electric current to alternating electric current; a capacitor module that is contained in the metal housing and arranged side by side with the power semiconductor module, wherein the capacitor module smoothes the direct electric current supplied to the power semiconductor module; a substrate that has a drive circuit part mounted in a first region, the drive circuit part driving the power semiconductor module, and a control circuit part mounted in a second region, the control circuit part controlling the drive circuit part, wherein the substrate is disposed so as to cover over the metal housing; a base plate that extends in a space in which the second region of the substrate and the capacitor module oppose to each other, and that is electrically connected to the metal housing; and a first noise shielding member that extends in a direction along a boundary between the first region and the second region of the substrate, wherein the first noise shielding member separates the space from a space of the housing in which the power semiconductor module is disposed, and the first noise shielding member is electrically connected to the metal housing or a ground of the control circuit part.

Power conversion device

Inductance is reduced while high insulation reliability between positive and negative electrodes of a DC bus bar is ensured. The DC bus bar() is held; the bus bar() is fixed by an insulating member() having an insulating property, with one surface() of the bus bar() exposed; the bus baris arranged such that the surfaceof the bus barfaces the surfaceof the second bus bar; an insulating sheetis held between the bus barand the bus bar; the first insulating memberhas a projecting partprojecting toward the second insulating member; and the projecting parthas, at an end part thereof, an abutting surfacein contact with the second insulating member

Bus bar structure and power converter using bus bar structure

A power conversion device includes a power semiconductor module that converts DC current into AC current, a capacitor for smoothing DC power, a first flow conduit defining member for defining a first flow conduit and for defining a first storage space in which the power semiconductor module is housed, and a second flow conduit defining member for defining a second flow conduit and for defining a second storage space in which the capacitor is housed. A first space, in which a vehicle component that is different from the power conversion device is disposed, is defined in a space to the side of the first flow conduit defining member and below the second flow conduit defining member.

Growing community of inventors

Hitachinaka, Japan

Yuki Fujita