A Reconfigurable High-Voltage Pulse Modulator with Full Discharge of the Pulse Forming Line

Abstract

The electric circuit of a modulator at an output voltage up to 10 kV, allowing one to quickly, during a pause between pulses of about 2 ms, to change the pulse duration at a load of 10–30 μs is considered. For the possibility of increasing the pulse amplitude up to 60 kV using a pulsed transformer. At a pulse duration of more than 5 μs is most appropriate to use artificial forming lines based on discrete elements, capacitors and inductors, collected in the form of Γ-shaped LC chains. The pulse duration at the load is changed by changing the number of units of such chains forming a line, collected on a ladder diagram. “Soft” management switches, such as HiPakTM IGBT module switching thyristors, type 5SNA 0400J650100, voltage 6500 V, and a current 400 A, with the lowest possible internal resistance, are used. Computer simulation in the program allows one to optimize previously obtained results of calculation of the forming line assembled from l-shaped LC combinations for the specified load value of about 500 Ω. We performed model optimization of circuit elements and switches. The modeled parameters of components, from the point of view of obtaining a minimum cost and reliability while maintaining the specified electrical characteristics, are given. The EWB and Multisim software are best used.