Hitachi, Ltd.

Haruki Hamada

Hideyo Suzuki

Kenichiro Nakajima

Atsuo Nishihara

Takeshi Matsuo

Masanori Musou

Ryuichi Saito

Koichi Yahata

Kinya Nakatsu

Masaaki Hayashi

Kaname Sasaki

Hiroaki Doi

Mitsufumi Iwanaka

Hideki Homma

Masato Takahashi

A power inverter comprises at least a box-shaped housing; and a power module, a smoothing capacitor, a base plate made of a flat plate, and a rotating electric machine control circuit board arranged in order in the housing. The base plate is arranged with the fringes fixed to the inner wall surfaces of the housing, and the smoothing capacitor and rotating electric machine control circuit board are fixed.

Reduced size power inverter suitable for a vehicle

Power inverter suitable for a vehicle

Downsized power inverter and housing for a larger heat release value

Water paths for feeding a coolant water through a power converter mounted on an automobile are arranged in parallel, openings are formed on the water paths respectively, heat radiating fins project from the openings, and the openings are closed by a base plate of the power module. Further, the base plate of the power module includes a metal in addition to copper to increase a hardness of the base plate, so that a deterioration of the flatness during fixing the fins with brazing is restrained.

Power inverter

To provide a power converter equipped with a current detector which is small and can carry out highly accurate current detection, in the power converter equipped with a power modulehaving a power controlling semiconductor elementdisposed on the power module basewith a ceramic substrateinterposed, and a control unitfor controlling the operation of the power controlling semiconductor element, a current detectorhaving a magnetic detecting unitwhich is disposed in the detection conductor, electrically connected to the power controlling semiconductor elementand disposed on the power module basewith the ceramic substrateinterposed, and has a magnetic detecting semiconductor elementelectrically connected to the control unitis provided in the power module; and relative distance between the detection conductorand the power module baseis larger than the relative distance between the current detection electrodeand the power module base

Power converter, power system provided with same, and mobile body

The power inverter includes: a case made of a metal; a first power module provided in the case and including a DC terminal and an AC terminal; a second power module provided in the case and including a DC terminal and an AC terminal; and a cooling formation body for decreasing heat generated from the first and second power modules. The first and second power modules are disposed in a manner such that the DC terminals face each other.

Power module for power inverter

A cooling system for a motor is prevented from exhibiting a thermal fatigue failure due to a temperature cycle. The operation or stopping of the cooling motor fanof the forced cooling system is controlled using the difference between the temperature thereof and the operation start temperature Tis of the power converter. Thus expansion of the temperature range is suppressed.

Cooling system for motor and cooling control method

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Naka, Japan

Haruki Hamada