Hitachi, Ltd.

Ichiro Osaka

Tatsuya Yoshida

Shinichi Sakamoto

Hiroyuki Saito

Mitsuhiko Watanabe

Kaneyuki Okamoto

A power-feed control apparatus for a vehicle in which electrical loads are arranged in the vehicle includes a power source provided in a vehicle; at least one power semiconductor element, the power semiconductors controlling power-feed to the electrical load; a control unit for controlling the power semiconductor element; an anomaly detection circuit for monitoring operations of the power semiconductor element and determining whether or not an anomaly is occurring in a circuit including the power semiconductor element and the electrical load; and a switching circuit for switching a threshold level between a level for an anomaly detection in a starting period of the load and that in a steady state of the load connected to the power semiconductor element; wherein if an anomaly is detected in the circuit by the anomaly detection circuit, the control unit turns off the power semiconductor so as to interrupt power-feed to the electrical load.

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Kawasaki, Japan

Ichiro Osaka