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具有负载普适性的高压双极性方波脉冲源研制

, PP. 51-60

Keywords: 双极性,方波脉冲,上升沿,Marx发生器,H桥

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Abstract:

为满足高压脉冲杀菌灭藻实验的需求,研制了一种新型极性可调方波高压脉冲电源.该电源前端为半桥式Marx电路,产生单极性重复频率的方波高压脉冲,后端级联一个H桥,通过控制H桥正,负向放电通道开闭的不同时序实现对高压脉冲极性的调节.本文对拓扑结构设计思路,不同负载时的工作原理和开关控制策略进行了阐述和分析,并利用PSIM软件仿真验证了该脉冲源设计方案的正确性.最后,研制了脉冲源样机,经测试证明,该脉冲源所采用的IGBT浮地驱动技术安全可靠,其最大输出电压达±7kV,输出电流达±10A,脉冲数达1kpps,额定输出时上升沿可达160ns,脉宽3.5μs,且能在阻性,容性,感性等各类负载下正常工作,并易于实现电压,频率,脉宽,极性的调节,易于实现模块化和小型化.

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