Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Hitachi, Ltd.

Honda Motor Co., Ltd.

Akihiro Goto

Tadahiko Chida

Hidenori Shinohara

Yoshiharu Yamashita

Minoru Ikeda

Yoshihiro Iwama

Akira Kojima

Yusaku Katsube

Fusanori Nishikimi

Shintaro Tanaka

Masaru Kamoshida

Tomoyuki Suzuki

Youhei Nishizawa

Morio Kuwano

Tatsuya Nakazawa

Keiichi Tadokoro

An electric circuit device includes: a first electric component; a first case that accommodates the first electric component and has a cooling channel for cooling the first electric component and a discharge port of the cooling channel; a second case that accommodates a second electric component and has a communication channel that communicates with a discharge port of the cooling channel; a first seal portion that is provided in a peripheral edge part of a discharge port of the cooling channel and seals the first case and the first electric component; a second seal portion that is provided outside the first seal portion with respect to a discharge port of the cooling channel and seals the first case and the first electric component; a through hole that is provided in the first case between the first seal portion and the second seal portion of and penetrates the first case from the first electric component side to the second case side; and a wall that is provided on one of the first case and the second case to surround a periphery of a discharge port of the cooling channel, and the through hole is provided outside the wall.

Electric circuit device

Provided is a power converter that allows a reduction in EMC noise current flowing through a control circuit board. A power converterincludes a semiconductor module, a capacitor, a control circuit board, positive and negative-side bus barsconnecting the semiconductor moduleand the capacitor, a baseelectrically connected to a ground of the control circuit board, the control circuit boardbeing placed on the base, and an electrical conductorelectrically connected to the baseand extending in a stacking direction in which the baseand the control circuit boardare stacked. The positive and negative-side bus barsextend around the electrical conductorand are connected to the semiconductor module

Power converter

An object of the present invention is to provide a small-sized and highly heat-dissipative reactor and a DC-DC converter using the reactor. A reactor according to the present invention includes a plate bus bar, a core, and a heat sink. The core includes a middle leg portion. The heat sink cools the plate bus bar. The plate bus bar is formed such that a winding axis of a winding including the plate bus bar passes through the middle leg portion. A main surface of the plate bus bar is disposed in parallel with a direction of the winding axis and thermally connected to the heat sink via an insulating layer.

Reactor and DC-DC converter using same

Provided is a power conversion device which suppresses a current unbalance of a plurality of secondary circuit modules provided in parallel and is manufactured in a compact size and at a low cost. The power conversion device of the invention is a DC-DC converter which boosts down and outputs an input voltage, and includes an input circuit which includes a switching element and output circuit modules which include a transformer and a rectifier element. A plurality of the output circuit modules are provided. The plurality of output circuit modules are electrically connected to the input circuit.

Power conversion device

An adverse effect on a smoothing capacitor device caused by heat is suppressed. A flow path forming bodyprovided with protruding portionsfor attaching a capacitor board, a smoothing inductor devicemounted on the flow path forming body, and a capacitor boardA on which a smoothing capacitor deviceis implemented are provided, and the capacitor boardA is fixed to the protruding portionsfor attaching the capacitor board, in such a manner that the smoothing capacitor deviceis away from the flow path forming body

Converter and electric power conversion apparatus

Objects of the invention are not to receive influence of an electromagnetic noise from a transformer and to reduce a possibility of breakage caused by shock or vibration. In a DC-DC converter apparatus of the invention, a shielding metal frameis placed between a transformerand a control circuit board assemblyA housed in a case. A plate springattached to the metal frameis pressed to coresof the transformerto fix the transformerto a bottom portionof the case. Heat generated from the transformeris transmitted to the metal frameand the bottom portionof the caseand is then radiated.

DC-DC converter apparatus

Video camera with digital video disk player

Growing community of inventors

Hitachinaka, Japan

Akihiro Goto