| Switched reluctance motor (SRM) has a simple structure, low cost, flexible controlfeatures, making it a preferred embodiment of electrical power output, and has been used inindustrial production in various fields. However, due to the switch reluctance motor stator androtor doubly salient structure and switching power supply mode, switched reluctance motornonlinear saturation characteristics of the electromagnetic field, makes the switchedreluctance motor analysis and design very different with traditional motor. And, switchedreluctance motor’s torque ripple is too large when it is running, which has also become amajor obstacle to the switched reluctance motor’s continued development.In this paper, for the purpose of reducing the torque ripple of switched reluctance motor,the aspects of optimization design of SRM’s pole tooth structure has been studied. Motordesign is the foundation of optimization, in this paper, the design method of switchedreluctance motor has been describes. The selection and determination of the motor’s structuresize and main parameters are discussed in detail. Based on the design method, a prototype hasbeen designed. Basic equations of switched reluctance motor and inductive models have beenanalyzed. It has done the groundwork for parameters calculation of the prototype. A motor model hasbeen established in the finite element analysis software environment. Two-dimensional finite elementcalculation has been done for the motor, getting the torque and other parameters. In order to achieve thepurpose of reducing the torque ripple, new stator and rotor pole tooth structure has been proposed. Agenetic algorithm optimization procedure has been written. Reasonable parameters have been selected foroptimization objective and constraints. The optimization for the prototype’s stator and rotor pole toothstructure has been completed. Analysis of optimization results shows that the torque ripple of switchedreluctance motor is effectively suppressed. |
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