抄録
In this study, we investigate the method of accurate characteristics calculation for salient-pole synchronous machines assisted by permanent magnets. First, the operating principle of the machines is investigated by using both finite element analysis and a simple magnetic circuit. Then, the theoretical expression of the assist effect of the permanent magnets is derived from the magnetic circuit. Finally, the measured and calculated results are compared in order to confirm the validity of the proposed calculation method. It is clarified that the load characteristics of the proposed machine can be accurately estimated from the no-load and short-circuit characteristics of the conventional machine without permanent magnets, and the size and magnetization of the inserted permanent magnets.
