In the design of the hysteresis motor, the selection of the optimum magnetic characteristics of the rotor ring is one of the most important problems. In general, this selection is determined by the condition of the magnetic characteristics that the efficiency of the motor becomes maximum. As the selection methods reported so far, the copper loss of the stator has been considered but the iron loss has not.
In this paper, on the condition that the operating flux density of the rotor is constant regardless of Hc of the materials, the optimum magnetic characteristics of the rotor have been selected by means of the equivalent circuit of the circumferential-flux type hysteresis motor considering the iron loss and copper loss of the stator.
The results of the optimum magnetic characteristics that this paper has predicted are compared with the experimental data of the sample motors. It has turned out that the two results are in good agreement.
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