新型超环面电机爪式转子磁场的解析计算

Magnetic Field Analytical Calculation of the Claw Rotor for a New Type Toroidal Motor

爪式转子是新型超环面电机的中间传动机构,也是该电机的动力输出机构。针对该转子的特殊结构特点,利用等效电流法对其行星轮磁齿进行了等效建模,通过有限元磁场仿真验证了该模型的正确性;由齐次坐标变换原理推导了行星轮坐标系和该电机系统坐标系下磁场强度的计算公式,对爪式转子与内外定子气隙圆周磁场分布进行了解析计算,得到了其分布规律,验证了该解析方法的可行性。该研究为进一步对内外定子与转子间电磁力的计算提供了理论依据。

The claw rotor is the intermediate drive mechanism of the new type toroidal motor,and also the power output mechanism of the motor. Considering the special structure of the rotor,the equivalent model of the magnetic teeth was built based on the equivalent current method,and the model was verified by the finite element magnetic field simulation. The calculation formulas of the magnetic field in planet wheel coordinate and toroidal motor system coordinate were derived from the homogeneous coordinate transformation principle,the magnetic field distribution of the inner and outer air gap was calculated and the distribution was obtained,and the feasibility of the analytic method was verified. This study provides theoretical basis for the calculation of electromagnetic force of the novel motor.