Magnetic Field Analysis for the Dual-Stator Toroidal Motor with Hybrid Excitation

A dual-stator toroidal motor with hybrid excitation was proposed and its structure and operating principal were introduced. The spiral currents of worm armature coils were resolved into two orthogonal components. The FEM analytic models for current components were built. Distributions of static magnetic field were simulated. Air gap flux density curves were obtained. The simulation results justify the rationality of the electromagnetic parameters of the motor. The research results are useful for analyzing electromagnetic characteristics of the motor, and offer meaningful instruction for further research and practical application of the novel motor.