交流接触器虚拟样机设计技术

采用虚拟样机技术,建立全面反映交流接触器动态特性的三维虚拟样机模型,模型包含完整触头系统、铁心系统及连接部件,从而考虑结构特点对其运动特性的影响。引入Ansys/LS-DYNA动力学分析软件,采用基于连续介质力学的有限元法考虑机构之间的非线性接触、碰撞问题及弹性材料的形变作用,计算接触器动作过程中的触头弹跳情况。通过三维可视化界面得到触头、铁心等运动部件位移、速度随时间变化情况,对接触器动态特性进行直观地分析。通过交流接触器虚拟样机模型的仿真,从机械动力学角度,分析触头系统闭合速度和触头弹簧初压力、金属簧片物理特性及触头表面摩擦系数对触头弹跳的影响。交流接触器的三维虚拟样机设计对其结构优化设计具有良好的理论依据和实用价值。

Virtual Prototyping Technology of AC Contactor

With virtual prototyping technology, this paper establishes the 3D virtual prototyping model of AC contactor including the whole contact system, core system and connecting parts. It reflects the real dynamic characteristics of AC contactor affected by the structure. Based on the finite method of continuum mechanics, the nonlinear contact, collision problem and elastic material deformation have been taken into account in the dynamic analysis software Ansys/LS-DYNA. Contact bounce in the process of contactor action is simulated. Moreover, by 3D visualization window, the displacement and velocity of movable contact and core changing over time are obtained and the dynamic characteristics of contactor are analyzed visually. In addition, the influence of closure speed, pre force of spring, properties of reed and friction coefficient of contact on contact bounce has been analyzed from the view of mechanical dynamics. The 3D virtual prototype design of AC contactor provides theoretical basis for its structure optimization design and has high practical value.