Research On Mutually Coupled Switched Reluctance Motor (MCSRM)with New Rotor Geometry

Switched reluctance motor (SRM) has been widely used in electric vehicles, household appliances, industrial applications, servo systems, high-speed driving, aerospace, and many other fields because of the merits of their simple structure, low cost, high efficiency, good speed regulation and flexible controllability. However, the shortcomings of SRM in terms of large torque ripple, noise and vibration are difficult to overcome. Nowadays, most of the optimization method is about the control strategy optimization but less is about structure optimization.In this thesis, from the perspective of motor structure improvement and optimization of structural parameters, how to improve the output electromagnetic torque of the SRM and reduce its vibration and noise is studied. Regarding the6/4three-phase SRM as the object of the research, structure parameters of a conventional SRM and a MCSRM with new rotor geometry with a size of Φ160×L70mm are designed detailedly. Then the finite element (FE) simulation models of the two SRM types are built, the simulation results in the static field and the field-circuit coupling transient field are computed. The performances of the two SRM types are comparatively analyzed. And a modified Tabu Search algorithm (TSA) based optimization method is used to optimize systematically the structure parameters of the MCSRM with new rotor geometry.Firstly, the basic working principle and general design method of a conventional SRM are introduced, and the FE simulation model and the field-circuit coupling FE simulation model of the conventional SRM are established by using the Ansoft software. And its magnetic field distributions and the torque characteristics are analyzed by the simulation calculations in the static and transient fields. Then, the basic working principle and general design method of a MCSRM with new rotor geometry are studied. The FE simulation analysis in the static field is presented to study the effect of the motor structure parameters on the output torque characteristic. And the motor structure parameters are optimized by the method based on sweep and the torque performances of the conventional SRM and the modified MCSRM are comparatively analyzed. Finally, a modified TSA based optimizer, which is coupling with the FE simulation model, is used to optimize the structure parameters of the modified MCSRM comprehensively systematically with the help of Matlab software. And the optimization results of the two optimization method are comparatively analyzed.