Hitachi, Ltd.

Other

Hitachi Construction Machinery Co., Ltd.

Hitachi Astemo Ltd.

Director-general of Agency of Industrial Science and Technology

Takayoshi Nakamura

Ryuichi Saito

Akihiro Tamba

Kinya Nakatsu

Hiroki Funato

Takashi Suga

Atsuo Nishihara

Hideki Miyazaki

Toshio Ogawa

Hiroki Yamamoto

Kazuji Yamada

Takashi Namekawa

Hisanori Okamura

Takashi Naitou

Naohiro Momma

Taizo Ohno

Kenji Kimura

Satoru Kaneko

Yoshitaka Iwaji

Yuji Enomoto

Satoshi Watanabe

Michitaka Ohsawa

Makoto Onozawa

Masatsugu Arai

Hisashi Tanie

Naoki Sakurai

Tadashi Osaka

George Saikalis

Shinji Sugimoto

Akihiro Namba

Hirooki Tokoi

Shigeo Iriguchi

Naoki Fukuda

Takahiro Araki

Liang Shao

Takeshi Kuwahara

Kohei Matsushita

Hiroyuki Ooiwa

Makato Torigoe

Takeshi Kawahara

Yoshimasa Awata

Motoo Tanaka

Yasujiro Kawabata

Mutsuyoshi Matsumoto

Eiichiro Manda

Tatsuo Sekiguchi

Fusao Houjyou

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 dump truckincluding: an engine; a generatordriven by the engine; and a pair of driving wheelsL andR arranged to the left and right of a vehicle body frameincludes: a traveling electric motorL including a plurality of electric motorsLa,Lb, andLc that are coupled to the driving wheelL and simultaneously drive the driving wheelL; and a traveling electric motorR including a plurality of electric motorsRa,Rb, andRc that are coupled to the driving wheelR and simultaneously drive the driving wheelR. Thereby, drive systems corresponding to loads of dump trucks or the like can be configured using identical components.

Electrically driven work vehicle, and wheel electric driving unit

A highly reliable electromechanical integral motor is provided. In the electromechanical integral motor including an axial gap type motor and a power conversion control device, the power conversion control device is mounted on an end bracket portion of the motor. Additionally, a space is provided between the end bracket portion of the motor and the power conversion control device. Further, the end bracket portion of the motor and the power conversion control device are fixed by a plurality of fixing members, and at least one set of the plurality of fixing members is disposed to be spaced apart from each other.

Electromechanical integral motor

The object is to provide a power converter which is capable of minimizing an extent to which the power converter components other than the semiconductor module are thermally affected by the heat originating from the semiconductor module. The semiconductor modules constituting a main circuit for power conversion; a capacitor electrically connected to the main circuit; drive circuits that provide the main circuit with a drive signal used in power conversion operation; a control circuit that provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal. Within a casing, a cooling chamber including a coolant passage is formed, and a chamber wall of the cooling chamber is formed with a thermally conductive material. At least the semiconductor modules are housed inside the cooling chamber, and at least the capacitor and the control circuit are disposed outside the cooling chamber.

Power converter

A casing houses: semiconductor modules constituting a main circuit for power conversion; a capacitor electrically connected to the main circuit; drive circuits that provide the main circuit with a drive signal used in power conversion operation; a control circuit that provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal. Within the casing, a cooling chamber including a coolant passage is formed, and a chamber wall of the cooling chamber is formed with a thermally conductive material. At least the semiconductor modules are housed inside the cooling chamber, and at least the capacitor and the control circuit are disposed outside the cooling chamber.

An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.

Electrical apparatus, cooling system therefor, and electric vehicle

The object is to provide a power converter which is capable of minimizing an extent to which the power converter components other than the semiconductor module are thermally affected by the heat originating from the semiconductor module. A casing houses: semiconductor modulesconstituting a main circuit for power conversion; a capacitorelectrically connected to the main circuit; drive circuitsthat provide main circuit with a drive signal used in power conversion operation; a control circuitthat provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal. Within the casing, a cooling chamber including a coolant passageis formed, and a chamber wall of the cooling chamber is formed with a thermally conductive material. At least the semiconductor modulesare housed inside the cooling chamber, and at least the capacitorand the control circuitare disposed outside the cooling chamber

The object is to provide a power converter which is capable of minimizing an extent to which the power converter components other than the semiconductor module are thermally affected by the heat originating from the semiconductor module. A casing houses: semiconductor modulesconstituting a main circuit for power conversion; a capacitorelectrically connected to the main circuit; drive circuitsthat provide the main circuit with a drive signal used in power conversion operation; a control circuitthat provides the drive circuit with a control signal used to prompt the drive circuit to provide the drive signal. Within the casing, a cooling chamber including a coolant passageis formed, and a chamber wall of the cooling chamber is formed with a thermally conductive material. At least the semiconductor modulesare housed inside the cooling chamber, and at least the capacitorand the control circuitare disposed outside the cooling chamber.

First and second bases and composing a coolant path structure are arranged at the middle stage of the power converter, and semiconductor modules and a capacitor are arranged on both surfaces of the coolant path structure. Furthermore, through-holes are formed in the first and second bases, and cables of DC and AC circuits are laid via the through-holes.

A power converter of the present invention includes at least two power semiconductor modules having a plurality of switching devices, at least two cooling jackets having a coolant path for cooling the plurality of power semiconductor modules and equipped with the power semiconductor modules, a capacitor module interposed between the at least two cooling jackets, and a connector provided in the at least two cooling jackets for connecting the coolant path.

A power inverter of the type used with hybrid electric vehicles having a circuit board with a power layer having a first and second section which are electrically separated using slits from each other on the power layer. A control circuit is connected to and powered by the first section of the power layer while a switching power supply is connected to and powered by the second section of the power layer. An electromagnetic filter is electrically connected between the sections of the power layer. This electromagnetic filter blocks high frequency noises of the type generated by the switching power supply while enabling the sections to be maintained at the same DC voltage level. Optionally, a ferrite covering is provided around a current bus bar of the power inverter to contain magnetic fields generated by current flow through the bus bar.

EMI reduced power inverter

Growing community of inventors

Hitachi, Japan

Takayoshi Nakamura