退耦电感在五脉冲冲击下的压敏电阻能量配合效果

Energy Coordination of ZnO Varistor with Decoupling Inductance Under Five Pulses

目前退耦电感能量配合规律均基于单脉冲推导获得,而自然中闪电均具有多次回击。为研究退耦电感在多脉冲冲击下能量配合效果,通过理论与试验相结合的方法,利用实验室多脉冲冲击设备分析了退耦电感能量配合规律。研究发现五脉冲冲击下,退耦电感为8μH时,总通流量小于10kA时能够实现较好的能量配合;电感为60μH时,冲击电流大于28kA时能量配合效果开始下降;电感为60μH时能量配合效果好于40μH时能量配合效果,电感值为60、80μH对能量配合效果影响不大。总体来说,相比于单脉冲情况,五脉冲下退耦电感更加容易出现磁饱和现象。当电感出现磁饱和后,进一步增大电感值,能量配合效果提升不明显。研究结果为退耦电感数值的选择提供了依据。

The rules of energy coordination of decoupling inductance are based on the single pulse,and natural lightning has many times in return.In order to research the effect of energy coordination of decoupling inductance under multiple pulses,through the method of combining the theory and experiment,multiple pulse impact device in laboratory was used to study the rules of energy coordination of decoupling inductance.The study shows that the well energy coordination under 10 kA total current impact of five pulses can be achieved when the value of decoupling inductance is 8μH.when the decoupling inductance value is 60μH,the effect of energy coordination will decline if impact current is greater than 28 kA,while it is better than the effect of energy coordination of 40μH.The effect is the same when the decoupling inductance value is 60μH and 80μH,respectively.This proves that compared with single pulse,decoupling inductance is easy to reach magnetic saturation under five pulses.When decoupling inductance appears magnetic saturation phenomenon,the energy coordination effect of decoupling inductance is not obvious for further increase of the value of decoupling inductance.The results provide the basis for the value choice of decoupling inductance.