Formulation and analysis of torque output for torque motor with limited rotation angles

This paper presents a mathematical model of torque motor based on the magnetic circuit method. Through establishing equivalent magnetic circuit, the internal magnetic field of torque motor is analyzed. Following that, the output torque can be calculated. The results of this model are verified by three-dimension finite element analysis and conform well with the analysis. Our obtained results can be utilized in the realization of system optimization including the adjustment of structure parameter, material parameter and improvement of design.