Analysis and Simulation of a Limited-Angle Torque Motor

The motor described in this paper is a limited-angle torque motor (LATM) used in thermal imaging applications. Based on electromagnetic theory, the formula of motor torque was obtained by analyzing the magnetic circuit and energy of the motor. In the meantime, main factors that affect the performance characteristics of the motor were investigated according to the formulas of motor torque. The simulation of the motor was done using Maxwell2D, a Finite Element Method. The simulation results show excellent agreement with theoretical analysis. The conclusions in this paper may provide suggestions for further work which may improve the performance of the LATM to meet special requirements.