Design consideration of a novel hybrid-magnetic-field machine combining RSMs and HIAs for high-power PPS

The eddy-current losses of the solid rotor of homopolar inductor alternator (HIA) used for the high-power pulsed power supply (PPS) draw sufficient attention for serious temperature rising and efficiency problem. This paper introduces a novel hybrid-magnetic-field machine (HMFM) to address this issue. The novel HMFM is a hybrid of a conventional HIA and a reluctance-synchronous machine (RSM), integrating both the motor and generator functions. The rotor of the novel HMFM is made of silicon steel sheet rather than alloyed steel in order to reduce the rotor losses. For high-power PPS, the novel HMFM does not require an external driven motor to accelerate the rotor to store the inertia energy. Its design considerations for high-power PPS are presented in, and the comparison between the two PPSs is discussed in this paper. The results show that the rated field current of HMFM with silicon-steel-sheet rotor is about 12.5% larger than the HMFM with solid rotor. And the PPSs based on novel HMFM are much more efficient than conventional HIA. What’s more, its continuous ability is much better than the conventional HIA.