Research of high voltage RSDS triggering circuit in multi-modules capacitor discharge PFN for EML
In this paper, a compact pulsed power capacitor discharge module is considered to realize large current output for electromagnetic launching. A novel triggering circuit is proposed based on inductive adder circuit topology to provide optimal reverse current for controlling the high voltage RSDs assembly switching properly. Experimental results verified the IAT triggering circuit electrical and magnetic design.
Reverse switch-on dynistor switches of gigawatt-power microsecond pulses
A high-power (150 kA and 16 kV) small switch based on an assembly of reverse switch-on dynistors (RSDs) connected in series and a coaxial saturable-core choke, which creates conditions for their efficient switching, is described. An essential feature of this switch is a drastic reduction of the duration of the control action, as a result of which minimum dimensions and a low inductance of the saturable-core choke are ensured at a high (25 kA/μs) rise rate of the switched current. Increases in the control-current amplitude and rise rate that are required for maintaining the triggering charge at a constant level are attained thanks to the use of a fast-acting switch based on new semiconductor devices—deep-level dynistors—in the RSD-control circuit.
Pulsed power generator utilizing fast SI-thyristors for environmental applications
Fast SI-thyristor switching systems were designed and examined for environmental applications. The authors characterized three kinds of SI-thyristor with different device structures by using an extremely low inductance testing circuit, and confirmed the superiority of punch-through and flat-anode structures for fast turn-on characteristics. In order to accomplish fast turn-on operation, they developed a fast and high current gate-driving circuit for repetitive pulsed power applications. The SI-thyristors were successfully operated with a fall time of 35 ns and a current rising rate of 9.5/spl rlarr2/10/sup 10/ A/s. To clarify technical issues for higher voltage operation, they employed three SI-thyristors stacked in series to assemble the generator, which was operated with a repetition rate of 2 kHz.