10kV绝缘栅双极型晶体管固体开关的研制

采用8只IXLF19N250A绝缘栅双极型晶体管串联研制成功了10kV固体开关。试验表明:该固体开关最高输出电压为14kV，最高输出脉冲电流为20A、输出脉冲宽度可在2~112μs之间以1μs步长变化，脉冲重复频率范围为1Hz~4kHz，短时间可以工作到8.6kHz。

Small signal analysis of the transit-time effect in the nonuniform three-cavity oscillator

Traditional transit-time oscillators such as split-cavity oscillator, three-cavity oscillator (TCO), super-reltron etc., have a common characteristic that the span between foils in the modulating cavity is equal. By varying span from equal to different, we developed a new device called nonuniform three-cavity oscillator (NTCO). Based on the motion of the single electron whose incident phase was ψ0 in standing wave electric field under the small signal condition, the transit-time effect of electron beam in π mode standing wave electric field in the NTCO was investigated, function expression of beam-wave power conversion efficiency was obtained, and the constrained optimization problems were solved through penalty function method. The conclusion is that beam-wave power conversion efficiency of the nonuniform structure is higher than that of the uniform structure.