The Speed and Position Sensorless Control of Switched Reluctance Motor using Binary Observer

초록

It is well known that the encoder or resolver is necessary to obtain the positon information for speed or position control. Generally utilized speed sensors are mal-affected by the EMI, dusty, and high temperature surroundings. Therefore the speed and position sensorless controls have been studied widely.In this paper, the binary observer which is composed of two feedback compensation loops to control the speed of SRM(Swithed Reluctance Motor) is applied. One loop compesates the control input directly like sliding control, and the other compensates parameters of system indirectly. This ovserver is constructed on the foundation of variable structure control theory and has the inertial term for the varying parameter. So this method has a good estimation performance in spite of nonlinear modeling of SRM and uncertain parameter valuesThe proposed methods are proved by experiments.