Research Of A Practical Nanosecond High-voltage Pulse Power Source

When plasma is applied to desulfuration or sewage treatment, it need meet two conditions: narrow pulse width and high voltage. On this ground, this project designs a novel practical nanosecond high-voltage pulse power source. This power source can be widely used in the discharge of a variety of gases, liquids, solids.In this paper, power electronics and pulsed power technology are adopted to design a high-voltage nanosecond pulse power. This power source is divided into the low part and the high part. The BUCK circuit and high-frequency inverter circuit are used in the low part. Thus a DC series resonant power supply the voltage and the frequency of which can be adjusted is designed. The magnetic pulse compressor(MPC) and the semiconductor opening switch(SOS) are used in the high part. A high voltage pulse wave shape is obtained. A 51 kv negative pulse is formed which had a pulse width of 120 ns and steep rise time of 60 ns.The dissertation introduces the principles and the integrated design of the high voltage pulse power supply in detail, introduces the parameter design of the BUCK circuit,the full bridge inverter circuit, the saturable transformer and magnetic switch, the thyristor, the semiconductor opening switch,obtains the influence rule of the circuit parameters on the output waveform of the load by the PSPICE circuit simulation and the actual eperimental study, compares the simulation waveforms and the experiment waveforms.After the testing of the pulse power supply, we reached the expected goal and succeed in using the power supply in a cigarette factory in Yunnan, and it was running stably.