基于响应面法的交流接触器弹簧系统优化设计方法

Optimal Design Method for AC Contactor Spring System Based on Response Surface Method

交流接触器是一种频繁操作的开关电器,其运动过程中的吸反力配合直接影响可靠性和性能指标,良好的吸反力配合能减少触头弹跳、提高分断特性。在此过程中,交流接触器的弹簧系统发挥着关键作用。针对交流接触器弹簧系统的多目标优化问题,提出一种动态过程的电磁-机械耦合仿真方法和弹簧实体仿真方法,在此基础上引入基于灰色关联法和响应曲面法的综合优化方法,建立触头弹跳时间、触头刚分速度、触头闭合速度、铁心闭合速度与触头弹簧自由高度、触头弹簧有效圈数、反力弹簧自由高度和反力弹簧有效圈数的二阶预测模型,对弹簧系统进行优化设计。实验结果表明,该优化方法获得的弹簧系统参数能有效减小触头弹跳时间,降低触头及铁心的闭合时间,提高触头分断速度,对于提高交流接触器的工作性能具有积极意义。

AC contactor is a frequently operated switching device,and its match of the magnetic force and reaction force during movement directly affects the reliability and performance.A good force match can reduce contact bounce and improve breaking performance.In the process,the spring system plays a key role.For the multi-objective optimization of the spring system,an electromagnetic-mechanical coupling simulation framework and an entity simulation method for springs are presented.A comprehensive optimization method based on grey relational method and response surface method is introduced.The second-order prediction model is established that describes the influence of contact spring free height,contact spring effective coil number,reaction spring free height and reaction spring effective coil number on bounce time,contact breaking velocity,contact closing velocity and iron core closing velocity.Accordingly,the reaction system parameters are optimized.The experimental results show that the optimal reaction system parameters can effectively reduce the bounce time and the closing time of the contact and the iron core,and increase the contact breaking velocity,which is helpful to improve the working performance of AC contactors.