Design study of FSPM generator with novel outer rotor configuration for small wind turbine application

Flux Switching Permanent Magnet Machine (FSPM) is a new type of machine that due to their fault tolerant capability, high torque and power density and simple structure become a proper candidate for wind turbine power application which could easily satisfy the grid code requirements. In this paper a novel outer rotor configuration design of FSPM is proposed. The design procedure is carried out based on two main factors including reducing the stator pole number and increasing the rotor pole number to improve the electrical loading and the output torque capability of the machine respectively. Due to the low electrical frequency of the direct drive FSPM machine, increasing the rotor pole number would not cause any drawback such as significant hysteresis loss of the machine and switching loss of the machine side converter. The results have shown an appropriate behavior of the machine for wind turbine application from electromagnetic point of view.