Speed Sensorless Vector Control of Parallel Connected Induction Motor with Anti-windup Integral-Proportional Speed Controller

Abstract

This paper presents speed sensorless vector control with anti-windup integral-proportional (AWIP) speed controller of parallel connected induction motor fed by single inverter. Luenberger observer is adopted to estimate rotor flux, stator current, and motor speed. Vector control with average and difference mechanism works to overcome unbalanced load torque. An AWIP speed controller is employed to improve the degradation of system performance due to windup effect such as large overshoot, slow settling time, delayed response and could even destabilized system. It will be compared to anti-windup proportional-integral (AWPI) speed controller to verify the reliability. Simulation results show that speed sensorless vector control with AWIP performs better to eliminate overshoot in transient response.