Comparative Analysis of the Air Gap Magnetic Field of 2-segment Halbach Array Permanent-magnet Motors
Aiming at the problems of unclear classification of 2-segment Halbach array PMs,lack of compar-ative analysis of magnetic field performance,and difficulty in designing,this paper divided the commonly used 2-segment Halbach arrays into standard,radial,and simplified types,the analysis and research on the magnetic field of the three types of Halbach arrays were carried out.Taking the Halbach array inner rotor permanent magnet motor as the research object,the analytical calculation model for the air-gap magnetic field of the three types of 2-segment Halbach array were established respectively.Based on the analytical cal-culation,the influence analysis of the design parameters on the air-gap magnetic field of three types of Hal-bach arrays was analyzed and compared.It is found that for the three types of Halbach arrays with certain size,there are optimal ratio of main magnetic pole and pole pairs,evaluated from the perspective of funda-mental amplitude and total harmonic distortion,the performance of the standard Halbach is better than that of the other two types of Halbach arrays,the optimal fundamental amplitude of the three types of Halbach arrays continues to decrease with the increase of permanent magnet thickness ratio.
2-segment Halbach arrayair-gap magnetic fieldanalytical calculation modelscomparative analysis
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