Abstract:

The tooth layer area of a hybrid stepping motor is the key to its torque generation. To achieve specific performance, the appropriate tooth layer geometry needs to be selected during motor design. In this study, the shape parameters of the trapezoidal tooth are optimized, and the electromagnetic structure of the motor is optimized to achieve a higher torque output. Specifically, an existing three-phase hybrid stepping motor in the market is used as a prototype. Based on its structural parameters, an efficient three-dimensional finite element model is established to generate optimized samples. Then, combined with the Taguchi optimization algorithm, the stator and rotor tooth shape parameters are used as optimization design variables to obtain the best trapezoidal tooth structure through numerical methods to maximize the motor output torque. After optimization, the torque peak of the torque-maximizing prototype is increased by nearly 25%, which proves the effectiveness of the optimization scheme.

Key words: hybrid stepping motor, motor performance, trapezoidal tooth layer, electromagnetic structure, three-dimensional finite element model, Taguchi optimization, numerical method, torque maximization