基于反向开关晶体管的脉冲电源在电磁发射中的应用

Application of Pulse Power Supply with RSD Switch in Electromagnetic Launch

为了进行电磁轨道炮发射机理研究,研制了一套基于反向导通双晶复合晶体管(RSD)全固态开关的电容储能型脉冲功率电源。RSD开关采用可控等离子体换流技术,具有全面积均匀同步导通、开通损耗小、功率大、换流效率高、寿命长的特点。电源系统由16个64 k J储能模块并联组成,采用一体化紧凑设计,内嵌充电、控制、保护与测量功能。系统额定电压18 k V、总储能1 MJ,可通过时序控制对放电波形进行调节,短路同步放电峰值可达960 k A.系统在20 mm口径电磁轨道炮上进行了多次发射试验,结果表明脉冲电源系统可靠性高,一致性好,输出波形灵活可调,满足轨道炮超高速发射研究的需要。

A capacitor-based pulsed power supply （PPS） with reversely switched dynistor （RSD） is develop to study the launch mechanism of electromagnetic railguns. The RSD for which controlled plasma converter technology is used shows the following characteristics： simultaneous switching response in whole area, lower switch-on losses, higher power capacity, higher current transfer efficiency and long service life. A multi-module parallel structure with sixteen 64 kJ pulse power modules is applied. PPS adopts a compact and integrated design as well as built-in functions, such as charging, control, protection and measurement. Operational voltage of PPS is 18 kV, the stored energy is 1 MJ, the discharge waveform can be adjusted through the sequential control, and the short-circuit synchronization discharge peak current is 960 kA. Several launch tests were conducted on 20 mm caliber electromagnetic launching （EML） device with PPS, The experimental results show that the system has high reliability, and is capable of outputting adjustable current waveform. PPS can fulfill the research needs of hypervelocity launch experiment in EML.