ELECTRIC-MOTOR DRIVE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an electric-motor drive device capable of driving a motor without using motor constants such as coil resistance and reactance of the motor.

SOLUTION: An electric-motor drive device comprises a vector control unit 11 that converts a three-phase output current from an inverter 10 into a torque current and a magnetizing current and controls the torque current and the magnetizing current. The vector control unit 11 comprises: a torque voltage control unit 21 for determining a torque voltage command value based on a deviation between a torque current command value and the torque current; a magnetizing voltage control unit 22 for determining a magnetizing voltage command value based on a deviation between a magnetizing current command value and the magnetizing current; a target magnetizing current determination unit 26 for determining the magnetizing current command value based on a deviation between the output voltage from the inverter 10 and a target output voltage; and a target output voltage determination unit 27 for determining the target output voltage. The target output voltage determination unit 27 stores a V/ω pattern showing the relationship between the target output voltage and an angular velocity, and determines the target output voltage from the angular velocity according to the V/ω pattern.

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