Influence of pole-slot combinations and winding form on electromagnetic characteristics of torque motors

In order to research effects of pole-slot combination and winding form on the electromagnetic characteristics of torque motor, the parameter modeling of permanent magnet torque motor is carried out in this paper. Under the same stator and rotor size, the models of permanent magnet torque motor with different pole-slot combination and winding form are established. To solve the problem, finite elements are used to compare and analyze the no-load back electromotive force, output torque, torque ripple, cogging torque and loss of different models, and the optimal pole-slot matching and winding form are determined. By making a prototype, the experimental test is conducted to verify the effectiveness of the theoretical analysis.