In this paper, using the method of equivalent current sheet, based on the multipole electrode stator model, the Poisson equation in the computational domain is solved by introducing the magnetic vector, and the single-turn coil, single-phase winding and three-phase winding are studied step by step. Finally, the analytical expression of the armature reaction field of three-phase windings is deduced. Compared with the finite element simulation, the waveform and amplitude of the magnetic flux show a good consistency, which confirms the accuracy and effectiveness of the analysis method. This provides a theoretical basis for the optimization design and performance analysis of the permanent magnet motor.
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