LAUSR

ABSTRACT Current gradient sensorless method (CGSM) is easy to implement and is a cost-effective way to eliminate position sensor from switched reluctance motor (SRM). But delay produced in peak detection stage during filtering phase current restricts the use of this method for high-speed and open-loop applications. This paper presents modified CGSM to improve performance and reduces the complexity of implementation for low-frequency PWM-controlled SRM drive. The proposed method also eliminates the use of phase-lock-loop from the commutation stage and improves the stability of the system. Simulation and experimental results are compared with conventional CGSM to validate the proposed method.