Abstract：As for the traditional 4-pole 6-slot double-sided symmetrical long primary permanent magnet linear synchronous motor, under the condition of ensuring the electromagnetic thrust, an effective method to reduce the permanent magnet eddy current loss was proposed by adopting bilateral dislocation. The basic structure of the motor was introduced. The double-sided dislocation structure could completely eliminate the even number of armature harmonic magnetomotive force, thereby greatly reducing the permanent magnet eddy current loss. The finite element analysis (FEA) software was adopted to analyze the detent forces of symmetric and dislocation structures, the electromagnetic thrust and the secondary eddy current losses. The accuracy of the dislocation method was proved and the structure was optimized. At last, a prototype was developed, and its back-electromotive force (back-EMF), detent force and static thrust were measured through an experimental platform.
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2021, Vol. 36 
