A 10kV Modular Solid Boost-Marx Pulse Generator With Inductive Isolation

Abstract

Solid-state Marx pulse generators are widely used in biomedical electroporation, food processing, and plasma material modification. It uses parallel charging of energy storage capacitors and series discharging to achieve high-voltage pulse output. However, the isolation resistance used to charge the energy storage capacitor seriously affects the generator's charging speed and overall efficiency during high-frequency pulse output. In this paper, an inductor is selected as an isolation device in a traditional solid-state Marx circuit. And only add a switch in the circuit to form a solid-state boost-Marx pulse generator (BMPG). The added switch is equal to the voltage level of each module in the circuit. The output pulse amplitude is several times, and the efficiency is increased through the use of energy during the charging and discharging of the inductor. The proposed circuit retains the Marx circuit's advantages in simple structure, stability, reliability, and modularization and improves the output pulse gain and parameter control flexibility. It also reduces the input DC power supply requirement. When using 12 modules, the input DC voltage is only 235V, which can achieve 10kV high-voltage pulse output. The pulse voltage boost multiple can reach 42.5 times.