A Motor Torque Control Method Based On Integration Quasi-Resonant Controller For Reduced DC-link Capacitance IPMSM Drive System

摘要

Traditional variable speed motor drive system utilizes large volume electrolytic capacitor to buffer energy and stabilize the dc-link voltage, which narrows the conduction angle of diode-rectifier. As a result, the grid side current is distorted and the power factor is deteriorated. In order to settle these issues, a motor torque control method based on the relationship between inverter power and motor torque is proposed, and high power factor control of reduced dc-link capacitance IPMSM drive system is realized. An integration quasi-resonant (IQR) controller is established to regulate the motor torque. Effectiveness of the proposed method is verified through simulation and experiments, and the harmonics of grid side current can be reduced under the limits of IEC61000-3-2.