Multicoil torque modeling of reluctance spherical motor based on linear interpolation

Abstract

Due to the large amount of finite element calculation resources, the calculation stability is low. In order to obtain accurate torque data conveniently, a new torque modeling method is proposed in this paper. By establishing the minimum torque model, the finite element software is used to obtain elementary torque map, and the torque within the whole rotor motion range is built by polynomial fitting, and then the position torque in the process of rotor motion under different currents is obtained by multiple linear interpolation method, and converted to the global coordinate system by projection. The multicoil torque is superimposed and corrected by using the dynamic error coefficient to obtain the final synthetic torque. Finally, the effectiveness of the modeling method is verified by simulation and experiments. The results show that this method not only ensures the modeling accuracy, but also speeds up the calculation.