Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Hitachi Industrial Equipment Systems Co., Ltd.

Hitachi Astemo Ltd.

Other

Hitachi Keiyo Engineering Co., Ltd.

Kinya Nakatsu

Takeshi Tokuyama

Ryuichi Saito

Toshiya Satoh

Fusanori Nishikimi

Hideki Miyazaki

Takeshi Matsuo

Hideyo Suzuki

Keisuke Horiuchi

Hiroshi Hozoji

Yusuke Takagi

Toshiya Satou

Takayoshi Nakamura

Satoshi Ibori

Hiroshi Fujii

Takanori Ninomiya

Toshiaki Ishii

Takashi Suga

Hiroki Funato

Shiro Yamaoka

Nobutake Tsuyuno

Tokihito Suwa

Minoru Oosuga

Katsunori Azuma

Taku Oyama

Mutsuhiro Mori

Toshiaki Okuyama

Eiichi Ide

Junpei Kusukawa

Masahiro Hiraga

Junji Kato

Hiroyuki Tomita

Atsuo Nishihara

Keijiro Sakai

Masayuki Hirota

Hideaki Ishikawa

Ken Maeda

Atushi Kawabata

Toshio Ogawa

Yoshitaka Takezawa

Seiji Ishida

Shinichi Fujino

Akihiro Tamba

Masataka Sasaki

Hiroshi Kamizuma

Yukio Hattori

Morio Kuwano

Norinaga Suzuki

Shinji Hiramitsu

Yosei Hara

Atsushi Yukita

Masashi Yura

Tooru Nakajima

Teiichi Furukawa

Eiji Nishioka

Masato Takase

Yoshitaka Iwaji

Yasushi Sasaki

Tsunehiro Endo

Toshiyuki Ajima

Kazuji Yamada

Kaoru Uchiyama

Hisashi Tanie

Akira Matsushita

Takahiro Shimura

Michiaki Hiyoshi

Atsushi Kawabata

Kimihisa Furukawa

Akihiro Namba

Takuro Kanazawa

Hiromi Shimazu

Kouji Sasaki

Shigeo Amagi

Koichi Yahata

Haruaki Motoda

Hajime Urai

Masahiko Asano

Masamitsu Inaba

Akira Mima

Haruki Hamada

Takahiro Araki

Yutaka Maeno

Tomoya Kamezawa

Naoki Takata

Noriya Nakao

Seiichi Hayakawa

Takao Yanai

Kazuhiro Ito

Masami Oonishi

Keijirou Sakai

Toshiki Kurosu

Mitsufumi Iwanaka

Hiroyuki Ooiwa

Masato Takahashi

Yuujiro Kaneko

Provided is a power conversion system that can suppress a fault in a short-circuiting switch that bypasses a fault unit and enhance the reliability and redundancy of the system. The power conversion system is provided with a plurality of power converter units that are formed by using semiconductor switch elements and are connected in series, and comprises: switch elements that are provided to input terminals and/or output terminals of the power converter units and bypass the power converter units; and overvoltage suppressing elements which are connected in parallel with the switch elements and in which conducting states are changed by an application of a prescribed voltage.

Power conversion system

An object of the present invention is to provide a wheel drive device capable of suppressing a temperature increase in an electric motor and a power conversion device and suppressing occurrence of a failure of an electric component. Provided are: an electric motor having a statorand a rotor; a stator holderthat holds the stator; a power conversion devicethat converts power supplied to the electric motor; and a wheel which accommodates the electric motor, the stator holder, and the power conversion deviceon the inner peripheral side. The stator holderincludes a flow paththrough which a cooling medium flows. The flow pathis arranged between the statorand the power conversion device

Wheel drive device and electric vehicle provided with the same

A power module includes a double-sided electrode module, a power semiconductor element, a pair of base plates, and a connecting member. The double-sided electrode module has a plurality of electrode wiring boards and a power semiconductor element which are molded with a resin material. The pair of base plates has the double-sided electrode module sandwiched therebetween. The pair of base plates are connected via the connecting member. The connecting member is formed in a curved shape.

Power module, power converter device, and electrically powered vehicle

The metallic case of a power conversion apparatus includes a casing having a side wall, as well as an upper case and a lower case, a first area being formed between a cooling jacket provided at the inner periphery of the side wall and the lower case, the metal base plate dividing the first area between the cooling jacket and the upper case into a lower side second area and an upper side third area, first and second power modules being fastened to a top surface and a capacitor module being provided in the first area, driving circuits that drive inverter circuits of the power modules respectively being provided in the second area, and a control circuit that controls the driver circuits being provided in the third area.

Power conversion apparatus and electric vehicle

An electric power conversion apparatus includes a channel case in which a cooling water channel is formed; a double side cooling semiconductor module that has an upper and lower arms series circuit of an inverter circuit; a capacitor module; a direct current connector; and an alternate current connector. The semiconductor module includes first and second heat dissipation metals whose outer surfaces are heat dissipation surfaces, the upper and lower arms series circuit is disposed tightly between the first heat dissipation metal and the second heat dissipation metal, and the semiconductor module further includes a direct current positive terminal, a direct current negative terminal, and an alternate current terminal which protrude to outside. The channel case is provided with the cooling water channel which extends from a cooling water inlet to a cooling water outlet, and a first opening which opens into the cooling water channel.

Electric power conversion apparatus

Technology leading to a size reduction in a power conversion apparatus comprising a cooling function and technology relating to enhancing productivity and enhancing reliability necessary for commercial production are provided. Series circuits comprising an upper arm and lower arm of an inverter circuit are built in a single semiconductor module. The semiconductor module has cooling metal on two sides. An upper arm semiconductor chip and lower arm semiconductor chip are wedged between the cooling metals. The semiconductor module is inserted inside a channel case main unit. A DC positive electrode terminal, a DC negative electrode terminal, and an alternating current terminalof a semiconductor chip are disposed in the semiconductor module. The DC terminalsandare electrically connected with a terminal of a capacitor module. The alternating current terminalis electrically connected with a motor generator via an AC connector.

Power conversion apparatus

A power converter device includes a double-sided electrode module in which an electrical wiring board and a power semiconductor element are molded with a resin material. The power converter device also includes a heat dissipating base disposed on both sides of the double-sided electrode module and directly contacting cooling medium. The power converter device also includes a module fixture which presses the heat dissipating base in a state of contact with the heat dissipating base. The module fixture is configured to support a circuit board.

An inverter () is disposed toward an opening in a motor side metal housing (). A power module () is disposed on a metal cover () that is in contact with the metal housing (). The power module () includes a semiconductor element, a metal terminal connected to the semiconductor element, and resin that seals the semiconductor element and the metal terminal. A metal plate () is disposed on a surface of the power module () that is positioned opposite the metal cover (). Heat generated by the power module () is dissipated from the metal cover () and from the metal plate (). This improves the heat dissipation performance. Thus, the size of the power module can be reduced.

Power conversion apparatus having a metal plate for heat dissipation

An object of the present invention is to provide a power module having high reliability. The power module according to the present invention, includes a circuit body and a case housing the circuit body. The case has a first case member including a first base plate and a second case member including a second base plate. The first case member has a first side wall portion formed in an arrangement direction of the first base plate and the second base plate. The second case member has a second side wall portion formed in the arrangement direction, the second side wall portion coupling to the first side wall portion. The first side wall portion and the second side wall portion are formed so as to have the sum of lengths of the first side wall portion and the second side wall portion in the arrangement direction smaller than the thickness of the circuit body. The first case member has a deforming portion smaller than the first base plate and the second base plate in rigidity.

Power module

A power converter device includes a double-sided electrode module that converts direct current power to alternating current power, a heat dissipating base, a capacitor module, a positive electrode conductor plate, and a negative electrode conductor plate. In the heat dissipating base, heat dissipation surfaces, facing one another, of the double-sided electrode module facing to one another are held with insulation layers being present between the heat dissipating base, and the heat dissipation surfaces. The capacitor module constitutes a smoothing circuit for inhibiting fluctuation in DC voltage. The positive electrode conductor plate and the negative electrode conductor plate transmit electric power between the capacitor module and the double-sided electrode module.

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Hitachinaka, Japan

Kinya Nakatsu