双极性直线型变压器驱动源的研制

针对双极性脉冲电压介质阻挡放电（DBD）的应用需求，提出了一种基于直线型变压器驱动源（LTD）的全固态双极性纳秒脉冲形成拓扑。脉冲产生期间各开关的驱动电路均可靠共地极大降低了高低压隔离需求，因此与传统单极性LTD一样理论上可实现脉冲子模块的无限制叠加以获得更高电压的双极性脉冲输出。各脉冲子模块上集成数量相等但具有相反电压极性的储能电容，使隔离磁心的励磁电流在不同脉冲极性下正负交变，有效提高了磁心的利用率，不再需要设置专门的磁通复位电路。最后研制了一套模块化紧凑型双极性LTD原理验证样机，可输出脉冲参数为:电压幅值0～±2 kV，脉冲电流80 A，脉冲宽度50～200 ns，所有脉冲参数可通过上位机灵活可调，通过增加LTD子模块数量可获得更高的脉冲电压。

A bipolar nanosecond pulse source based on liner transformer driver

Aiming at the application demand of bipolar pulse voltage DBD discharge, an all-solid-state bipolar nanosecond pulse forming topology based on linear transformer driver (LTD) is proposed. The control circuit of each switch does not require additional high voltage isolated power supply in the operating state. In theory, it can achieve unlimited stacking of modules like the traditional unipolar LTD to obtain higher voltage bipolar pulse output. Each module integrates same number of energy storage capacitors with opposite voltage polarity, which makes the magnetic core's exciting current alternate between positive and negative directions under different pulse polarity, thus effectively improves the utilization rate of the magnetic core, and does not need an additional magnetic flux reset circuit. Finally, a modular compact bipolar LTD principle verification prototype was developed. The key parameters of the prototype are as follows: amplitude 0 to ±2 kV, pulse width of top flat 50 ns?200 ns, burst repetition frequency 500 kHz. All the pulse parameters can be flexibly adjusted through the host computer.