Design And Optimization Of Two Special Motors

Today,the environmental problems become increasingly prominent,the growing lack of energy,ecological and conservation concepts gradually become a global consensus,so with high torque density,design freedom,circuit and magnetic circuit decoupling and other advantages of the transverse flux permanent magnet motor(TFPM)and with good speed performance,simple structure,high efficiency and low cost of synchronous reluctance motor are paid close attention to the research of scholars at home and abroad.However,TFPM has the advantages of large leakage flux,high cogging torque and complicated processing.The synchronous reluctance motor has the advantages of high torque ripple and low power factor.Therefore,the paper focuses on the outer rotor polygonal TFPM magnetic flux leakage and cogging torque suppression,low torque ripple synchronous reluctance motor design and optimization,those researchs both theoretical significance and engineering application value.In view of the existence of large leakage flux and cogging torque in the transverse flux permanent magnet synchronous motor,the design of the external rotor magnetic flux permanent magnet synchronous motor is carried out.The motor adopts the conjugate stator structure to realize the magnetic flux leakage,And then based on the finite element analysis to determine the stator tooth width,to achieve both the motor circumferential magnetic flux leakage and cogging torque suppression.Then,the research on the inhibition of the cogging torque of the motor is carried out,and the effective suppression of the cogging torque is carried out by the measures of the chute of the traditional motor.Synchronous reluctance motor is also faced with the defioiency of high torque ripple and low power factor,furthermore,its effioiency needs to be improved.Therefore,the design and multi-objective optimization of synchronous reluctance motor were mainly researched to reduce torque ripple,improve power factor and effioiency.At first,an asymmetric rotor structure was used to design synchronous reluctance motor with low torque ripple,then the optimization variables of synchronous reluctance motor was determined by Taguchi method,and then,the genetic algorithm was used to implement the multi-objective optimization of synchronous reluctance motor including torque ripple,power factor and effioiency.Finally,The scheme's effectiveness of synchronous reluctance motor design and its multi-objective optimization were verified by FEA.