PERFORMANCE SIMULATION OF HYSTERESIS MOTORS USING ACCURATE ROTOR MEDIA MODELS

Recently, there has been an increased demand for small and medium size d brushless-type synchronous motors. Among these types, hysteresis mot ors have been especially used in those applications requiring precise speed and constant starting torque capabilities. In the past, several digital techniques for simulating the performance of hysteresis motors have been developed. These techniques, however, involved significant approximations to the rotor magnetic properties. The purpose of this p aper is to present a numerical approach through which exact rotor magn etic properties can be incorporated in the developed simulation techni ques by utilizing Preisach-type hysteresis models. Numerous simulation s for a sample 3-phase motor have been performed. It is found that pre dicted v-i characteristics qualitatively matches Similar published exp erimental results. Other results concerning the developed torque and h armonic content are also given in the paper.