A multi-level multi-waveform high-voltage pulse forming circuit

Abstract

The invention discloses a multi-level multi-waveform high-voltage pulse forming circuit. A high-voltage energy storage capacitor C1 to C6, diodes D1 to D10, switching transistors K1 to K16, a DC powersupply Vin, and a load R. The high-voltage pulse topology structure of the invention is a modular circuit structure, and more identical modules can be added according to requirements to achieve the desired effect. The invention can generate a multi-module pulse voltage under the condition of an external DC power supply and then through the control of an external operation control circuit U1, andthe electric characteristics of the required pulse voltage can be adjusted according to requirements, and various pulse electric parameters can be flexibly adjusted. The circuit provided by the invention can realize good switching between low voltage and large current and high voltage and small current, and the pulse shape, the pulse frequency, the pulse width and the pulse number can be well adjusted. The invention adopts the principle of charging and discharging capacitors to generate pulse voltages.

Description

technical field [0001] The invention belongs to the technical field of high-voltage pulse generators, and relates to a circuit, in particular to a multi-level and multi-waveform high-voltage pulse forming circuit, which is suitable for various occasions that require pulse voltage, especially for applications that require from low voltage to high voltage Where there is a wide range of variations and a variety of pulse waveforms are required. Such as tumor treatment, food preservation, sewage treatment, electrostatic dust removal and high pressure forming, etc. Background technique [0002] Pulse power technology is a technology that stores energy first and then releases it to the load with a single pulse or repetitive pulse. Pulse power technology is widely used in industry, agriculture, medicine and basic science research. For example, pulsed electric field is a kind of pulsed power technology. Pulse electric field is a new type of non-thermal sterilization technology, whi...

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Problems solved by technology

[0003] However, as far as the current situation is concerned, very few electrical equipment have the above functions at the same time, and generally can achieve a single function

There are three main ways to generate high-voltage pulses: the first is to convert low-voltage DC into high-voltage pulses through pulse transformers. This method can generate pulses with high voltage amplitudes, but it is difficult to generate pulse voltages of various shapes. It is also easy to generate strong electromagnetic interference; the second way is to generate pulse voltage through the transmission line. This method can generate high-voltage pulses with a pulse width of nanoseconds. Since the transmission line uses inductance and capacitance to produce pulses, it is obvious that the inductance It has a strong inhibitory effect on current, and it is difficult to generate low-voltage and high-current pulses

And like the pulse transformer, it is also difficult to generate pulses of various waveforms, and it is easy to generate strong electromagnetic interference to the external environment; the third method is to first charge and store the pulse energy storage capacitor through a high-voltage DC power supply, and then use high-voltage The switch discharges the energy storage capacitor to form a high-voltage pulse, which basically can only form a unipolar pulse

[0004] Traditional pulse generators are mostly built with analog circuits, resulting in complex control and difficult to guarantee stability

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