Analytical Models for Polyphase Hysteresis Motor

Using parallelogram model to the B-H characteristic of the hysteresis material, general expressions for the terminal quantities of a polyphase hysteresis machine are derived. Steady-state equivalent circuit models are developed for both the synchronous and sub-synchronous modes of operation. A comprehensive analysis of rotor parasitic loss components and stator saturation effects is made and these are represented by suitable parameters in the general equivalent circuit models. Reasonably close agreement between the measured and calculated terminal quantities is obtained.