一种分析多连杆永磁操动机构动态特性的方法  

A New Analytical Method of Dynamic Characteristics of Permanent Magnetic Actuator with Multi-bar Linkage

作　　者：汪倩[1] 陈德桂[1] 李兴文[1] 游一民[1] 孙志强[1] 

机构地区：[1]电力设备电气绝缘国家重点实验室(西安交通大学),陕西省西安市710049

出　　处：《中国电机工程学报》2006年第7期128-133,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50507016)

摘　　要：动态特性是永磁操动机构优化设计中的关键问题。文中提出了一种适用于计算多连杆永磁机构的动态特性的方法。使用有限元法计算电磁场,通过对基于多体动力学理论的仿真软件ADAMS进行二次开发,将永磁操动机构的机械运动方程与电路、磁场的方程进行耦合求解,实现了对永磁操动机构分合闸过程的动态特性仿真。结果表明:分闸弹簧的预压力仅会引起动触头和动铁心其运动特性的平移,而不影响分闸时间;增大永磁机构中动铁心的直径,会降低动触头的运动速度,并显著缩短整个分闸过程所需的时间,励磁线圈的电流也相对较小。相关的实验也验证了仿真结果的正确性。Dynamic characteristic is key to optimize the design of permanent magnetic actuator. Based on the permanent magnetic actuator with multi-bar linkage, a new analytical method that calculates dynamic characteristic is proposed. Electromagnetic field is calculated by finite element method. With the secondary development of ADAMS software, the dynamic characteristics simulation could be performed through coupling the equations of mechanical system motion with the equations of electric circuit, electromagnetic field. It demonstrates that increasing the preload of breaking spring will result in shifting the dynamic characteristics of moving contact and armature forward, and have no influence on the total breaking time, and increasing the diameter of the armature will reduce the total breaking time and the exciting current. Experiments also have been done to verify the validity of the simulation results.

关 键 词：高压电器 永磁机构 动态特性 耦合问题 多体动力学 

分 类 号：TM561.2[电气工程—电器]