Analysis of Electromagnetic Performances on an In-Wheel Switched Reluctance Motor Based on Field-Circuit Coupling

The magnetostatics calculation is firstly carried out for an in-wheel SRM with three phases and 18/24 poles and several performances are obtained, including L-i-θ, T-i-θ, magnetization characteristics, the distributions of flux linkage and magnetic flux density at different rotor positions. Then the saturation and nonlinear characteristics of SRM are taken into consideration, and co-simulation of field-circuit coupling method based on Simplorer and Maxwell are applied for the SRM to analyze the transient performances and the current and torque curves under various conditions are also presented. Finally, a prototype is manufactured and the experimental waveforms are measured ranging from starting-up, steady operation, variable-speed to load adjustment. The consistent results between simulated and measured waveforms verify the validity of the method and its results.