VECTOR CONTROL DEVICE FOR ELECTRIC MOTOR ELECTRIC MOTOR VEHICLE DRIVE SYSTEM AND VECTOR CONTROL METHOD FOR ELECTRIC MOTOR

摘要

A vector control unit for calculating an output voltage to be output by the power converter by vector control based on a torque command and a magnetic flux command and generating a PWM signal for controlling the power converter based on the output voltage, A first magnetic flux command generating section for generating a magnetic flux command for the PWM mode and a second magnetic flux command generating section for generating a magnetic flux command for the synchronous PWM mode. When the output frequency of the electric power converter is lower than a predetermined value, The magnetic flux command generated by the command generation unit is input to the vector control unit, and when the output frequency of the power converter is equal to or greater than a predetermined value, the magnetic flux command generated by the second magnetic flux command generation unit is input to the vector control unit.