The latest development of the motor/generator for the flywheel energy storage system

In comparison with other ways, it introduced the advantages and the main application of modern high speed flywheel energy storage(FES). It discussed the composition and principle of FES system. It presented the key techniques development of motor/generator (M/G) for the FES system in recent years, and summarized the latest developments of three machines such as: induction machine(IM), reluctance machine(RM) and permanent magnet machine (PMM) including traditional structure PMM and Halbach structure PMM, which now widely used in the FES system. The characteristics of three machines had been compared and analyzed, which provides guidance for the FES field researchers to choose appropriate M/G.