Design And Analysis Of Auxiliary Magnetic Barrier Permanent Magnet Synchronous Motor

With the rapid development of power electronics and machinery industry,more and more motors are widely used in various industries.Because of its advantages of small size,light weight and high efficiency,permanent magnet synchronous motor(PMSM)is widely used in various fields of industrial production,such as electric vehicle,lift ladder,mechanical arm and so on.But the expensive rare earth permanent magnet materials and high temperature demagnetization still restrict the application range of PMSM.To solve the above problems,a new type of auxiliary magnetic barrier permanent magnet synchronous motor(AMBPMSM)is proposed,which combines the characteristics of PMSM and synchronous magnetoresistive motor(SRM).It still has the advantages of high torque density,small torque ripple and strong demagnetization resistance while reducing the amount of rare earth permanent magnet materials.Firstly,by consulting a large number of relevant documents and materials,this paper expounds the background significance of the research and the research status of AMBPMSM、PMSM and SRM.The structural characteristics and mathematical models of PMSM and AMBPMSM are introduced,and the equivalent magnetic circuit model of d 、 q axis is analyzed.Secondly,based on the experience value of the PMSM,the electromagnetic load,the stator scheme,the main size of the motor,the rotor scheme,the air gap length and the winding temperature rise are determined in turn from the technical index of the motor,and the dimensions and parameters of the motor are finally determined.The general platform of electromagnetic calculation is developed by using MATLAB software according to the M file of electromagnetic calculation program.The electromagnetic calculation of permanent magnet motor is realized quickly and conveniently.Thirdly,the AMBPMSM rotor structure,the shape of the magnetic bridge,the shape of the magnetic barrier,the number of layers of the magnetic barrier and the proportion of permanent magnets are determined,and the load torque,torque ripple and efficiency of the AMBPMSM 、 "—" type and the "V" type built-in permanent magnet synchronous motor(IPMSM)are compared by using the finite element simulation software.Furthermore,the thickness optimization of rotor segment oblique pole and magnetic barrier is carried out on the AMBPMSM,and the slot torque and no-load back EMF before and after,which lays a foundation for the optimization of motor rotor structure.Because of the limited space,this paper only studies several parameters,and the research on this aspect needs to be further deepened.Finally,based on the analysis of the PMSM experimental requirements and the comparison of the dynamometer system of the motor experimental platform,the general scheme of the motor experimental platform system is put forward,and the general scheme principle of the motor experimental platform system is described.Furthermore,the no-load experiment and load experiment are carried out with the "V" type IPMSM as the prototype,and the corresponding torque and efficiency changes are recorded and compared with the simulation results.The experimental results have certain engineering reference value.