CONTROL METHOD OF PERMANENT MAGNET SYNCHRONOUS MOTOR

摘要

PROBLEM TO BE SOLVED: To provide a control method of a permanent magnet synchronous motor which maximizes voltage utilization factor in a flux-weakening region when driving a buried permanent magnet synchronous motor mounted on a hybrid vehicle and an electric car, and performs torque error compensation by using a torque error compensation filter when the motor constant changes due to a peripheral environment element.SOLUTION: A command voltage (Vdc*_MVSC) output in an MVSC control mode is used for motor torque control in a flux-weakening region by performing a step for generating a current command (Idq*) by using a map data section based on a magnetic flux to which a torque command Te*and a motor speed/battery output voltage (√3ωr/Vdc) are input, and a step for switching to the CVC control mode of a current control mode in the static torque range of a synchronous motor, or switching to the MVSC control mode of voltage phase control mode in the flux-weakening region of a synchronous motor.