Research On Structure Design And Optimization Of Modular Stator Switched Reluctance Linear Motor

Switched reluctance motor(SRM)has been widely concerned in recent years due to its advantages of many controllable parameters,high reliability,low loss,low price,good fault tolerance performance and suitable for application in harsh environment.The emergence of new structure is an important link to promote the development of SRM.This paper is devoted to the research of a new structure modular tubular switched reluctance linear motor(TSRLM).The development of SRM is introduced in the paper firstly,and the importance of linear motor is summarized in linear system.It is pointed out that the problems of eccentricity and end effect increase the difficulty of modeling and analysis.Then it is proposed that TSRLM can effectively avoid these problems,which reflects the advantages of TSRLM.However,there are some problems of the existing TSRLM,such as high manufacturing cost,unable to mass production and so on.To solve these problems,this paper proposes a modular stator 12-pole TSRLM and a modular stator6-pole TSRLM.In view of the new structure modular TSRLMs,their structural characteristics and advantages are comprehensively introduced firstly,and their working principle are summarized.Then,the three-dimensional finite element models of the two modular TSRLMs are built by finite element software FLUX,and the finite element calculation is carried out.Through the calculation results,the electromagnetic analysis and magnetization curve analysis of the two novel TSRLM models are carried out,and then the electromagnetic characteristics of the two TSRLMs are compared.Referring to the previous design method of structural parameters of rotary SRM,the initial structural parameters of the two modular stator TSRLMs are determined.Four key structural parameters are selected respectively in the structural parameters of the two TSRLMs to optimize the average electromagnetic force of the most critical optimization target of motor.The optimal structure parameters are determined and the optimization results of the two motors are compared.To verify the consistency of experimental results and simulation results,the prototype of the 12-pole TSRLM is manufactured for experimental test.The hardware experimental platform and motor experimental platform are built,and the hardware circuts modules are introduced.The accuracy and effectiveness of the finite element model are verified by static flux linkage test and electric performance test.Then,the power generation experiment is carried out through the experimental platform,and the power generation simulation is carried out in the MATLAB / SIMULINK dynamic simulation model under the same conditions.Comparing the experimental results with the simulation results,it is found that they are basically the same.The accuracy of dynamic simulation model and simulation results is proved.The comprehensive performance of the motor can not reach a good level for the single objective optimization.Therefore,the 6-pole TSRLM with better performance in the two modular TSRLMs is selected for multi-objective optimization.The traditional multi-attribute decision-making algorithm,improved information Entropy Taguchi algorithm,is used to determine the optimal weight coefficient according to the corresponding calculation process and construct Taguchi orthogonal test table.Then the mean value and signal-to-noise ratio are used to analyze the calculation results of the comprehensive evaluation function.The final optimization result is determined according to the comprehensive evaluation function which is the optimal value.The corresponding parameter combination of the optimal value of the comprehensive evaluation function is the final optimization result.Finally,the multi-objective optimization results are verified by dynamic simulation.There are 54 figures,13 tables and 105 references in the thesis.