直流5kA电磁斥力驱动式高速触头操动机构动作可靠性的优化设计

Reliability Optimization Design of DC 5 kA High-speed Contacts Operation System Driven by Electromagnetic Repulsion Mechanism

额定大电流的电磁斥力驱动式触头操动机构难以实现工程化,论文从减小电磁斥力、增强材料强度、提高机构工程可实现性等方面考虑,提出了增大驱动电容减小预充电压、斥力线圈放电回路中串联电感、优化斥力线圈结构参数以及采用电导率较小、相对磁导率较大的钢材作为斥力线圈支撑板等的优化方案。仿真和试验数据表明:在斥力线圈放电回路中串联电感,不仅保证了驱动电容的体积尽可能小,有利于工程应用,也极大地降低了脉冲斥力对机构的机械冲击,提高了机构的动作可靠性,有效地延长了其机械寿命。

It is difficult to real＆e engineering of high-speed contacts operation system driven by ERM based on high rated-current. In consideration of repulsion decrease, materials strength enhancement and the system engineering, four optimization designs are put forward in this paper such as increasing the drive capacitance and decreasing the pre-charged voltage, connecting an inductor in series to the coil discharge loop, optimizing the coil structure parameters and applying the steel with small conductivity and big relative permeability to the coil-supporting plate. Simulation and test data show that an inductor connected in series to the coil discharge loop is able to improve the system reliability and engineering.