行波管高压电源变换器设计研究

Design of a high voltage power converter for traveling wave tubes

针对真空电子器件对高压电源的特殊需求,对单级变换器在应用中所存在的不足进行了分析,提出了两级倍压变换器设计,并给出了两级变换器的基本结构。对前级变换器的设计进行了深入分析,对后级变换器的基本工作过程以及软开关实现条件等进行了探讨。利用变压器漏感参与谐振实现半桥级开关管的软开关,使变压器的分布参数得到了充分利用。通过Pspice软件对两级变换器进行了原理性仿真,结果验证了理论分析的合理性。基于理论分析和仿真实验研制了一台实验样机,测试结果表明后级变换器开关管具有良好的软开关特性,系统具有较高的效率。

According to the special demands of vacuum electronic devices, the shortcomings of single stage converters were analyzed, and the design of two stage voltagedoubler rectifying converter was presented. Based on the analysis of working conditions, the design method of the first stage was deeply studied. The working process of the second stage of the converter and the implementation requirements of the soft switching were investigated. The soft witching of the half bridge switch was achieved by using the leakage inductance of the converter to incorporate in the reso nance. The simulation experiment was carried out based on the Pspice and the results verified the rationality of the theoretical analysis. Based on the theoretical analysis and the Pspice simulation, a prototype was built. The results of the test on the prototype verified that the second stage had the good soft switching characteristics and the two stage converter had a high efficiency. The waveforms and the results of the experiment validate the feasibility of the con verter.