Circumferential Flux Type Hysteresis Motor with Rotor Ring of Copper Sprayed Surface Layer

There are two purposes in this paper. The one is to divide the rotor of the hysteresis motor for the improvement of the characteristics. The divided rotor has slits inside the rotor ring as many as poles, and the rotor surface is sprayed with copper powder. The reason for making the character of salient pole by slits is to add the reaction torque to the hysteresis torque at synchronous speed, and the next reason is to add the large eddy current torque to the hysteresis torque in asynchronous period, due to used the high conductivity of copper.The other of purpose of this paper is analysis of the motor in synchronous and asynchronous periods. On the Cartesian coordinates, flux density distribution and vector potential are obtained by solving Maxwell's equations, and also the output is derived as vector power. Torque, current, efficiency, and power factor etc., derived from the equivalent circuit, and compared with the experimental values. The result of the andlysis gives good argeement compared with experimental values.