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.