MOTOR DRIVE DEVICE, HYBRID VEHICLE DRIVE DEVICE EQUIPPED THEREWITH, AND COMPUTER READABLE STORAGE MEDIUM RECORDING PROGRAM FOR MAKING COMPUTER IMPLEMENT CONTROL OF MOTOR DRIVE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a motor drive device that prevents an overvoltage from being applied to an electric load that is connected to the primary side of a voltage converter that performs voltage conversion in the failure of a DC power supply.

SOLUTION: A control device 30 controls inverters 14, 31 so that AC motors M1, M2 output zero output torque when detecting the failure of the DC power supply B based on a voltage Vb from a voltage sensor 10A or an temperature Tb from a temperature sensor 10B, generates signals STP1, 2, and outputs them to a boosting converter 12 and a DC-DC converter 20, respectively. The control device 30 generates signals SE of L-levels, outputs them to system relays SR1, SR2, and disconnects the system relays SR1, SR2. After that, the control device 30 generates a signal PWMDL, outputs it to the boosting converter 12, and switches the control of the boosting convert 12 to step-down control.

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