Design FEA and Dynamic Simulation Based Model of an Outer Rotor SRM for an Efficient Fan Application

In this paper, an outer rotor switched reluctance motor (SRM) is analytically designed for ceiling fan application and verified with finite element analysis (FEA). An 8/6 pole 4 phase SRM configuration, is favored because of low cost, elementary mass production suitability, and robust design. The magnetic circuit is analyzed for an unaligned and aligned positions, which helps to determine the unaligned and aligned inductances. Further, the geometrical and electrical dimensions are used to analyze the motor's electrical and magnetic performance by FEA. The results obtained from the FE analysis are quite close to the analytic value. The motor is operated under certain (aligned, unaligned and intermediate positions with different excitations) conditions to obtain the motor magnetization and performance characteristics. Moreover, the fluxes at different positions with different excitations is obtained from the FE analysis and is used to build a MATLAB/Simulink model. The designed ceiling fan motor's performance using an asymmetric bridge converter is simulated and analyzed for satisfactory operation for fan application.