Optimization of a Microscale, Axial-Flux, Permanent-Magnet Generator

摘要

This paper presents the design optimization and characterization of a microscale, permanent-magnet (PM) generator, capable of supplying 8 W of DC power to a resistive load at a rotational speed of 305,000 rpm. The generator is a three-phase, axial-flux, PM machine, consisting of a stator with Cu surface windings and a multi-pole SmCo PM rotor. Optimization of the machine geometries have resulted in a 30% improvement in power density over a previously reported machine (at 120,000 rpm). Furthermore, these design improvements in combination with higher rotational speeds has enabled a >7x improvement in total output power and a net power density of 59 W/cu cm.