Speed estimation with saliency of synchronous reluctance motor

Abstract

This paper presents a sensorless algorithm of the synchronous reluctance motor(SynRM). Conventionally flux estimation method using phase voltage integration has problem in low speed operation. This is due to insufficient terminal voltage in that speed. However in high speed operation, it is enough to estimate rotor flux. Therefore in this paper the current model which uses phase current signal is proposed to compensate the insufficiency of terminal voltage in low speed to estimate rotor position. Computer simulations are performed to confirm the adequacy of the proposed control scheme. The experiments are also performed for verification of proposed algorithm.