Patent ID: 8727960

Claim:
An auxiliary artificial heart pump drive device for driving an auxiliary artificial heart pump which includes a 3-phase AC motor, the pump drive device comprising: first and second pump control parts arranged in duplexed configuration, each pump control part configured for controlling the auxiliary artificial heart pump by outputting a 3-phase drive signal to drive the auxiliary artificial heart pump, wherein said each pump control part has a switch circuit which, when a failure is detected in the pump control part, is configured to electrically cut off a path through which the 3-phase drive signal is outputted to the auxiliary artificial heart pump, and a power source switch which, when the failure is detected in the pump control part, is configured to stop a supply of electricity to the pump control part, wherein when the first pump control part is in a normal state, the switch circuit and the power source switch of the first pump control part are set in a conductive state and the switch circuit and the power source switch of the second control part are set in a cut-off state, and when the first pump control part is in the failure state, the switch circuit and the power source switch of the first pump control part are set in a cut-off state and the switch circuit and the power source switch of the second control part are set in the conductive state, wherein the switch circuit of each pump control part is a bidirectional switch circuit, and the power source switch of each pump control part is a unidirectional switch circuit.