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基于脉冲变压器和脉冲形成网络的高压脉冲源
High-voltage pulse generator based on pulse transformer and pulse forming net
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摘要: 为了满足在高电压状态下对氧化锌陶瓷(ZnO)元件的检测需要，研制了一种基于脉冲变压器和脉冲形成网络(PFN)的，输出电压范围10~80 kV 可调，波形为近方波的高压脉冲源。根据实际研制过程，分别介绍了高压脉冲源的设计、仿真及系统电路构建。测试了高压脉冲源在标准负载(匹配)和氧化锌陶瓷负载上的输出情况。结果显示：脉冲顶降小于3%，顶部波动小于1.5%，前后沿指标均满足要求。因而，高压脉冲源可以用于氧化锌陶瓷的性能检测。Abstract: To test character of ZnO ceramics resistor undergoing high-voltage,a high-voltage pulse generator whose output pulse is approximately square and voltage amplitude varies between 10-80 kV was designed adopting pulse transformer and pulse forming net (PFN).The article introduces the principle,simulation,circuits of the high-voltage pulse generator,and elaborates output states of the power supply with a standard ZnO load.Test results show that the fall on the top of the waveform is less than 3 percent,the pulse top fluctuation is less than 1.5%,and pulse rising edge and falling edge all meet the requirements.The re-sults show that the high voltage pulse source can be used for performance testing of ZnO ceramics.
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