基于双管正激式变换器的金属表面去毛刺20kV高压脉冲电源

20kV high voltage based on double transistor forward converter pulse power supply for metal deburring

真空管内部的细小金属毛刺去除工艺中采用直流高压存在毛刺去除不净、较大毛刺剩余、影响产品耐压和频率测试等问题。为克服直流高压去毛刺的工艺缺点,采用低重复频率的高压脉冲去毛刺。为克服以真空电子管作为脉冲开关的传统高压脉冲电源和以半导体器件作为脉冲开关的全固态高压脉冲电源主回路和控制回路设计复杂以及成本高等缺点,研制了一台低重复频率和宽占空比的基于双管正激式变换器的高压脉冲去毛刺电源。可通过增加双管正激式变换器的数量,以并-并组合式双管正激式变换器方式,满足宽占空比的高电压输出,实现了模块化设计。该电源主回路和控制回路的设计简化,稳定可靠,扩展性好,成本低,为高压脉冲电源设计提出了比较新颖的解决方案。实验结果表明:该电源的输出参数满足设计指标要求,并且稳定、可靠。

I n the process of removing tiny metal burrs in the vacuum tube, DC high voltage dedurring has some problems such as removing burr, removing unclean, larger burr residual, and influencing the test of product voltage and frequency. In order to overcome the technical shortcomings of DC high-voltage deburring, high voltage pulse with low repetition rate is used to remove the burr. In order to overcome the complicated design and high cost of the traditional high-voltage pulse power supply with vacuum tube as pulse switch and the whole circuit and control loop of all solid-state high-voltage pulse power supply with semiconductor device as pulse switch, a high voltage low frequency and wide duty ratio based on two transistor forward converter pulse for deburring power supply is developed. Through increasing the number of two transistor forward converters, and dual forward converter, it can meet the wide duty cycle of high voltage output. The design of the main circuit and control loop of the power supply is simple, stable, reliable, expansibility and low cost, which provides a relatively new solution for the design of high-voltage pulse power supply. The experimental results show that the output parameters of the power supply meet the design requirements, and are stable and reliable.