Sanden Corporation

Yunhai Jin

Hiroshi Yoshida

To provide a high-voltage apparatus control device capable of judging the connection state of a connector and discharging residual charge in a short time. A control devicecontrols an electric compressor and is provided with an interlock loopannexed to a connectorfor connecting the electric compressor to an HV battery. The control devicedetects connection/disconnection of the connectoron the basis of the state of the interlock loopand forcibly discharges residual charge in an internal smoothing capacitorwhen disconnection of the connectoris detected.

Electric compressor control device

Provided is an interlock device for a high voltage apparatus which enables not only the diagnosis of the connected or non-connected state of a connector during normal operation of the interlock device, but also the detection of a failure of the interlock device itself, including a failure of the interlock loop. The device includes an interlock loopannexed to an HV connectorfor connecting an electric compressor to an HV battery, a detecting signal output unit, a first switching element, a controlling voltage switching circuit operable, in a closed state of the interlock loop, to switch a voltage applied to a control electrode of the first switching element according to an output of the detecting signal output unit, a second switching element operable, in an open state of the interlock loop, to apply to the control electrode of the first switching element an output of the controlling voltage switching circuit so as to cause an ON/OFF state of the first switching element to be inverted from when the interlock loop is in the closed state, and a failure diagnosis unit.

Growing community of inventors

Isesaki, Japan

Yunhai Jin