Development of a compact high-voltage pulser for hypervelocity microparticles injector

Abstract

This paper highlights the development of a high-voltage pulser that utilizes a zero-voltage-switching (ZVS) circuit and diode split flyback transformer to produce high-voltage DC pulses for a hypervelocity microparticle injector. In our circuit, the resonant inverter of the ZVS circuit is coupled to the diode split flyback transformer to generate a voltage of 10–40 kV. A power MOSFET (IXTQ 110N10P) is placed in the circuit to switch the variable DC input power supply to get a repetitive pulse output. The frequency of the high voltage output pulse can be adjusted from DC to 500 Hz, and the rise time of the voltage is about 0.28 ms. The high-voltage pulser has been connected to a microparticle injector to undergo testing, and the ejection of microparticles has been successfully observed. Detailed simulation and experimental results of the high-voltage pulser are presented.

High-voltage and high-current crowbar system based on pseudospark switches: from system design to verification

“…The operation of power crowbar system requires that the closing switches can withstand high voltage and then quickly enter the conductive state to pass through a high current with minimal loss. Solid-state switches, such as insulated gate bipolar transistor (IGBT) [14], metaloxide-semiconductor field effect transistor (MOSFET) [15,16], and silicon-controlled rectifier (SCR) [13,17], combine the advantages of high voltage (kilovolt level) and current handling capability with fast switching times, and are widely used as power devices in medium power applications. However, it is difficult for solid-state switches to meet the electrical requirements when dealing with the power crowbar system for plasma research.…”