摘要
电磁斥力机构(electromagnetic repulsion mechanism,ERM)作为断路器中快速斥力开关的重要组成部分,其动作速度对短路电流的顺利开断具有重要影响。为了进一步提高电磁斥力机构的分闸速度,结合铜高电导率和镁合金低密度的特点提出了一种应用“铜-镁合金”复合斥力盘的电磁斥力机构。基于有限元耦合场仿真分析了复合斥力盘厚度、内外径等参数对运动特性的影响,对复合斥力盘结构进行了优化。之后对比分析了“铜-镁锆合金”复合斥力盘、镁锆合金斥力盘和铝合金斥力盘的关键运动指标,发现复合电磁斥力机构的动作速度、驱动效率相较于普通金属斥力机构均显著上升。最后搭建样机,试验对比了普通合金斥力盘和复合斥力盘的运动曲线。试验结果表明“铜-镁合金”复合斥力盘相较于铝合金斥力盘运动特性提升明显。当电容预充电电压为750 V时,“铜-镁锆合金”复合斥力盘相较于普通的铝合金斥力盘在前1.5 ms内平均速度提升了14%。
Electromagnetic repulsion mechanism(ERM)is an important part of a fast repulsion switch.Its action speed has a great influence on the breaking of short-circuit current.To improve the opening speed of the electromagnetic repulsion mechanism,an electromagnetic repulsion mechanism using“copper-magnesium alloy”composite repulsion disk was proposed.The repulsive disk combines the high conductivity of copper and the low density of magnesium alloy.Based on the finite element coupling field simulation,the influences of the thickness,inner and outer diameters of the composite repulsive disk on the motion characteristics were analyzed.The structure of the composite repulsion disk was optimized.Then the key performance indexes of“copper-magnesium alloy”composite repulsive disk,magnesium-zirconium alloy repulsive disk and aluminum alloy repulsive disk were analyzed by simulation calculation.It is verified that the motion characteristics of the composite repulsive disk are significantly improved compared with the ordinary repulsive disk.Finally,a prototype is built.The motion characteristics of the ordinary repulsive disk and the composite repulsive disk are compared.The experimental results show that the motion characteristics of the“copper-magnesium alloy”composite repulsive disk are significantly improved compared with the ordinary aluminum alloy repulsive disk.The average speed of“copper-magnesium alloy”composite repulsive disk is 14%higher than that of the aluminum alloy repulsive disk in 1.5 ms,when the capacitor voltage is 750 V.
作者
翟晨乐
王亦堃
马星
杨飞
孙晋茹
官玮平
ZHAI Chenle;WANG Yikun;MA Xing;YANG Fei;SUN Jinru;GUAN Weiping(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;Electric Power Research Institute of State Grid Anhui Electric Power Co.,Ltd.,Hefei 230000,China)
出处
《高电压技术》
北大核心
2025年第6期3076-3088,共13页
High Voltage Engineering
基金
国家重点研发计划(2022YFB2403600)
国家自然科学基金(U22B20121)
陕西省“三秦学者”创新团队项目(西安交通大学先进直流电力装备关键技术及其产业化示范创新团队)(编号略)
陕西省资助项目(2022KXJ-142)。
关键词
快速斥力开关
电磁斥力机构
“铜-镁合金”复合斥力盘
运动特性
多物理场耦合仿真
fast repulsion switch
electromagnetic repulsion mechanism
“copper-magnesium alloy”composite repulsive disk
motion characteristic
multi-physics coupling simulation
