E-Drive Motor Torque Ripple Suppression Algorithm

Abstract:

This paper analyzes the resolver angle error, and introduces the rotor angle observer to reduce angle ripple and the internal mode control algorithm to reduce phase current ripple of the big reluctance torque motor. Using this method, a certain PHEV project in United Automotive Electronic Systems Cooperation was studied. It is found that the motor control current ripple is decreased by 77%, and the torque ripple is reduced by 83% at 4 000 r?min-1, 100 N?m.

Key words:torque ripple; angle error; big reluctance motor; angle observer; internal mode control