Surface-mounted permanent magnet motor control using calculated reference current and voltage

Abstract

Technical solutions are described for controlling a surface-mounted permanent magnet (SPM) motor, including: determining a peak torque value; determining a limited torque command based on a torque command and which does not exceed the peak torque value; determining, based on the limited torque command, an optimized current command; determining, based on the optimized current command, a reference voltage vector; and commanding, based on the reference voltage vector, an inverter to apply an output voltage to the SPM motor. Determining the reference voltage vector includes: calculating an optimized voltage command based on the optimized current command; determining a required d-axis current based on the optimized voltage command and based on a bridge voltage satisfying a supply voltage constraint; determining a reference d-axis current based on the required d-axis current; determining a reference current vector including the reference d-axis current; and calculating the reference voltage vector based on the reference current vector.