Fuji Electric Co., Ltd.

Masamitsu Takizawa

Yoshio Mori

Kohei Matsui

Hao Hou

Hiroyuki Kuwahara

Jun Kanda

Yuki Yano

So Nakamichi

Nobuyuki Kobayashi

Hidenobu Tsuchihashi

A power conversion device includes a power converter including a semiconductor module, to convert input power and output the converted power, and a capacitor electrically connected to the semiconductor module. The capacitor includes a capacitor-side terminal surface on which a capacitor-side terminal is arranged, and the capacitor-side terminal surface faces a module-side terminal surface of the semiconductor module.

Power conversion device

In each of a plurality of semiconductor element groups of a power converter, a second semiconductor switching element and a third semiconductor switching element are shifted from each other in a second direction such that at least a portion of fins with which the second semiconductor switching element overlaps as viewed in a direction orthogonal to surfaces of coolers is different from fins with which the third semiconductor switching element overlaps as viewed in the direction orthogonal to the surfaces of the coolers.

Power converter and power converter for railroad vehicle

A three-phase inverter apparatus includes an inverter main circuit in three phases having a plurality of semiconductor switching devices to convert a DC voltage into the three-phase AC voltages to be supplied to a pulsating load, a current detector configured to detect first and second output currents from the inverter main circuit, a voltage detector configured to detect first to third output voltages from the inverter main circuit, and a control circuit configured to generate a command compensation value using a value obtained by dividing a current RSM obtained from the first and second output currents by an average value of the current RSM, and generate the compensated control command for each of the switching devices by multiplying the command compensation value by a corresponding one of control commands each of which is generated for a corresponding one of the switching devices, using the first to third output voltages.

Three-phase inverter apparatus and control method thereof

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Suzuka, Japan

Masamitsu Takizawa