A 10 kW high-voltage pulse generator for corona plasma generation

Abstract

In this article we discuss a 10 kW high-voltage pulse generator for producing corona-induced plasma. The generator mainly consists of a three-step resonant charging circuit switched by thyristors, a transmission line transformer, and a triggered spark-gap switch. Voltage pulses of 30-100 kV with a rise time of about 20 ns, a pulse duration of 50-250 ns, pulse repetition rate of 1-900 pulses per second, energy of up to 12 J/pulse, and an average power of up to 10 kW have been achieved with a total energy transfer efficiency of about 80%-90%. At each frequency, the deviation of the energy per pulse is around 1.0%. Moreover, the generator has been tested for more than 100 h for both industrial demonstrations and laboratory investigations at an average output power of 1-10 kW.

Circuit dependence of the diameter of pulsed positive streamers in air

“…They also use the power supply in the most efficient way [29]. The present study therefore not only increases our fundamental knowledge on streamer discharges, but is also very relevant for applications.…”

“…Note that this supply is not inverting because the positions of capacitor and spark gap are exchanged in comparison to figure 1. The TLT provides 12.5 load impedance to the pulse former, but 200 to the discharge [29]. Therefore it is able to create high current pulses with better matching than a C-supply.…”

“…The energy from these oscillations anyway does not contribute to the primary streamer propagation. The matching of TLT-supplies to a corona discharge can be almost perfect in long wire-cylinder discharges at very high currents [29].…”

A high-voltage pulse generator for corona plasma generation

“…Very efficient heavy-duty high repetition rate generators and efficient corona plasma systems would lead to bridge the gap between fundamental research and industrial applications [8]. As part of the development of 1-10-kW high-voltage pulse generators [9], [10], this paper discusses some critical elements of the system. The final objective of this work is to develop circuit models to design industrial corona plasma systems.…”

“…The low-voltage part consists of a mains filter, a set of rectifiers or a dc power source, three air coil inductors , , and , three thyristors , and , two energy-storage capacitors and , and the primary windings of the pulse transformer TR. The high-voltage part mainly consists of the secondary windings of the pulse transformer TR, two high-voltage diodes and , two damping resistors and , an air coil inductor , a high-voltage energy-storage capacitor , a triggered spark-gap switch , an LCR trigger circuit [10], a transmission line transformer (TLT), and magnetic cores placed around the TLT cables.…”