中文摘要：

本文采用有限元软件ANSYS对TRL5型磁保持继电器动态吸力矩进行了计算。论文分析了磁保持继电器的工作原理和电磁吸力产生的机理；讨论了电磁吸力矩计算的电磁场理论基础；阐述了ANSYS中计算电磁吸力（吸力矩）的两种方法麦克斯韦张量法和虚功法的计算原理。为计算继电器吸合过程中的动态吸力矩，论文根据继电器吸合过程中轭铁和永磁体坐标变化特征，将动态吸力矩的计算转化为静态吸力矩的计算，使动态吸力矩的建模和计算过程大为简化。最后，论文介绍了ANSYS中计算电磁吸力（吸力矩）的具体步骤，并对计算结果进行了分析。计算结果表明继电器的吸力矩随着转动角度的增加而增加，衔铁吸合时吸力矩最大。

英文摘要：

This paper presents the 2D FEM which used to calculate the dynamic electromagnetic torque of TRL5 magnetic latching relay in ANSYS. The operation principle of magnetic latching relay is introduced and the generation mechanism of Lorenz forces is analyzed as well. The magnetic theory applied to obtain the electromagnetic torque of the magnetic latching relay actuator is discussed by the authors. Furthermore, the Maxwell stress tensor and virtual work methods, which are employed in ANSYS to calculate the electromagnetic torque are investigated. The coordinates＇ variation characteristics of the yoke and permanent magnet during the whole operation of relay shows that the dynamic electromagnetic torque can be calculated by using coordinate changes. Thus, we transform the dynamic solution into a static solution successfully, which reduces the difficulty and complexity of modeling and calculation greatly. Finally, the calculation sample of TRL5 magnetic latching relay is given to explain the modeling process in ANSYS. The simulation results indicate that the electromagnetic torque increases with the increase of the rotation angle and it reaches the maximum when the armature pulls in completely.