Research On An Energy Storage Homopolar Inductor Alternator Used In Pulsed Power Supply

The requirements of pulse power supply are high energy density, high power density and miniaturization. With the feature of high energy density and simple structure, the flywheel energy storage has been widely used in the area of pulse power supply. In the pulse power supply system which based on the flywheel energy storage technology, the performance of the rotary generator has a major impact on the performance of the whole system. With the advantages of simple structure, high reliability, high-speed operation ability, Homopolar Inductor Alternator(HIA) is particularly suitable for the application of pulse power supply system. So it is of great importance to do some research on an energy storage HIA used in pulsed power supply.According to the requirements of the pulsed power supply, a prototype of energy storage HIA is developed. Besides, the electromagnetic field of the HIA is calculated and the effects of the rotor tooth and slot parameters of HIA on air-gap flux density are analyzed. Finally, the no load characteristic is obtained from the experiment.First of all, based on the review of HIA, the structure and principle of HIA are studied, then the mathematical model of HIA in the a-b-c system is established and based on the magnetic circuit analysis method the calculating formula of self-inductance and mutual inductance are deduced. Secondly, a prototype of energy storage HIA is developed based on the analysis of the electromagnetic design characteristics. After that, electromagnetic field computations of the HIA are calculated by the 3-D finite element method, and the magnetic distribution regularities of the HIA are obtained. Besides, considering the 3-D finite element method is time consuming, the simplified 2-D model is built, and the effects of the rotor tooth and slot parameters on air-gap flux density are analyzed. The results showed that the waveform quality of the air-gap flux density and the output voltage can be improved by the optimization of the rotor parameters. Finally, verified the results of the 3-D finite element method by the no load experiment of the HIA.