摘要
触头弹跳引起的触点磨损和触点粘接等故障对继电器电寿命有重要影响。考虑磁保持继电器在簧片弹性形变和触头碰撞的相互作用下触头复杂的弹跳情况,将模型定义为刚体的处理方法不能还原柔性体簧片的实际运动状态。通过Ansys LS-DYNA,基于运动方程、材料本构方程和边界条件建立继电器动力学数学模型。通过Ansys Maxwell,基于麦克斯韦方程组建立继电器电磁学模型。通过Matlab交换不同物理场模型数据,实现相同时间域内两种模型多物理场的耦合计算和数据交互。通过与实验数据对比验证了仿真模型的准确性。在仿真基础上,探究静簧片弹性模量、铁心线圈电压和常闭静簧片预压力对触头弹跳的影响。证明了通过三维瞬态多物理场耦合仿真能够真实地还原继电器产品的工作状态,缩短产品的开发设计周期。
Contact wear and contact adhesion caused by contact bounce have an important impact on the electrical life of relay. Considering the complex contact bounce of the magnetic latching relay under the interaction of elastic deformation of the reed and contact collision, the processing method defining the model as rigid body cannot restore the actual motion state of the flexible reed. The collision of the rigid body leads to the deformation of the spring of the flexible body, which affects the action time and bounce of the relay. The accurate simulation of the movement state of the reed is an important prerequisite to ensure that the simulation results of dynamic characteristics have reliable reference value.In order to improve the accuracy and reliability of dynamic characteristics simulation, a rigid flexible coupling dynamic model is established to simulate the movement state of the relay. The traditional rigid flexible coupling method of model is to obtain the modal neutral file required for the establishment of flexible body with the aid of finite element software, and realize the coupling of rigid flexible model by importing the modal neutral file into the rigid body model of multi-body dynamics software. In addition to material properties, the deformation of flexible bodies is also affected by the mode order and the key points derived from the modal neutral file. Based on the motion equation, material constitutive equation and boundary conditions, the mathematical model of the motion field of the relay is established. Considering the impact of collision deformation of components on relay operation process, symmetrical penalty function method, hourglass coefficient and damping coefficient are used to deal with collision, contact and deformation of components. With the dynamics software Ansys LS-DYNA, the rigid flexible coupling model of relay electromagnetic system, contact system and transmission mechanism is established. Use APDL to build mechanical dynamics model. The electromagnetic model of relay is establi
作者
鲍光海
王金鹏
王毅龙
Bao Guanghai;Wang JinpengWang Yilong(College of Electrical Engineering and Automation Fuzhou University,Fuzhou 350108 China;Fujian Key Laboratory of New Energy Generation and Power Conversion,Fuzhou 350108 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2023年第3期828-840,共13页
Transactions of China Electrotechnical Society
