A Novel Flux-Regulation Permanent Magnet Excited HIA with Adjustable Relative Position of Two Halves of Rotor

The homopolar inductor alternator (HIA) has the advantage of high reliability, power density and energy storage density, which is successfully used in pulsed high power supply, power generator in airborne application, flywheel energy storage system, and propulsion system of ship. Though the copper conductor excited HIA has excellent flux modulation performance, its excitation loss is large. The permanent magnet (PM) excited HIA with mechanical flux modulation can address the problem of excitation loss, but it needs a complex extra flux modulator to change the flux. This paper introduces a novel flux-regulation permanent magnet excited homopolar inductor alternator (HIA) with adjustable relative position of two halves of rotor. The structure and operating principle of it are presented in this paper. The flux modulation is analyzed, and the FEM simulation is done to verify the theory of this paper. The simulation results show that the novel HIA has good flux-regulation performance.