新型全固态高压多电平波形发生器的研制

Development of a new all-solid-state high voltage multilevel waveform generator

为得到在生物医疗、器件物理特性等研究方面所需的高压多电平技术,提出了一种新型全固态高压多电平发生器结构。对比传统结构,该结构以更少开关管数量实现相同电平输出,这不仅减少了发生器的整体体积,更节约了成本,优化了系统的电磁兼容。详细阐述了电路的结构设计、工作原理以及阻性负载和容性负载下的控制时序,搭建了一台最大输出11级电平试验样机,实验表明,该高压多电平发生器采用改进型控制时序能够有效消除预脉冲现象,工作频率2 kHz,电压最高幅值±2 kV,能够在阻性和容性负载下稳定工作。

High-voltage multi-level technology has become a hot topic in biomedical and device physical properties.This paper proposes a new all-solid-state high-voltage multi-level generator structure.Compared with the traditional structure,the structure realizes the same level output with fewer switching tubes,which not only reduces the overall volume of the generator,but also saves cost and optimizes the electromagnetic compatibility of the system.In this paper,the structure design,working principle and control timing of resistive load and capacitive load are elaborated in detail.Finally,a maximum output 11-level tester is built.Experiments show that the high-voltage multi-level generator adopts improved type.Control timing can effectively eliminate the pre-pulse phenomenon,ensure the operating frequency of 2 kHz maximum amplitude±2 kV,stable operation in resistive and capacitive loads.