Control method for IPMSM based on PTC and PWM hold model in overmodulation range-Study on robustness and comparison with anti-windup control-

Abstract

Interior permanent magnet synchronous motors (IPMSMs) are employed for drive motors of electric and hybrid vehicles. Therefore, the control method in overmodulation range of inverter is important to achieve fast torque response and expand the operating range of IPMSMs. The authors proposed the control method over the full operating range based on perfect tracking control (PTC) with PWM hold model. This method takes into consideration the voltage limit ellipse of IPMSM by feedforward (FF) controller. However, when modeling error exists, FF controller limits the operating range or cannot prevent the windup phenomenon. In this paper, a method which can improve the robustness is developed. Proposed method considers the voltage limit ellipse by FF controller. But, in general, the voltage limit ellipse is taken into consideration by anti-windup control. Therefore, in this paper, proposed method is compared with a control method using anti-windup control.