Nanosecond pulse superposition direct current power supply device used for plasma ignition

Abstract

The invention discloses a self-designed-and-constructed power supply device for performing plasma ignition with high-energy nanosecond pulse superposed high voltage direct current, which comprises a DC high voltage power supply, a nanosecond pulse power supply and a nanosecond pulse integrated DC circuit. High voltage DC output and nanosecond pulse output are superposed via nanosecond pulse integrated DC circuit to obtain a nanosecond pulse superimposed DC power supply, applied to the load. The self-designed-and-constructed nanosecond pulse superposed direct current power supply device for performing plasma ignition is small in size, compact in structure and low in cost. The high voltage DC power supply and the nanosecond pulse power supply are integrated, which has the advantages of high discharge energy and device miniaturization and facilitates the usage. In the practical application, the power supply device can be used for internal combustion engine ignition and supersonic-speed airspace engine ignition.

Description

technical field [0001] The invention relates to an ignition device, in particular to a nanosecond pulse superimposed DC power supply device for plasma ignition. Background technique [0002] The plasma generated by nanosecond pulse discharge contains a variety of high-energy particles, with high density, strong activity and high energy, and is widely used in the field of plasma ignition. The power supply device with high discharge energy, integration, and small size plays an important role in promoting the application of plasma ignition. [0003] Existing plasma ignition devices are limited by many factors. First, the traditional plasma excitation power supply adopts DC or nanosecond pulse power supply. The discharge energy of DC power supply is low and it is difficult to ignite. At a higher value, there is still the problem that the energy of high-energy active particles in the plasma is low or even insufficient to ignite. In addition, many scholars at home and abroad hav...

AI Technical Summary

Problems solved by technology

This requires a huge power supply structure and a complex circuit system, which limits the flexibility of the device. With the development of the plasma ignition power supply device, it is necessary to superimpose the pulse voltage and the DC voltage inside the power supply and then output it to the load to improve Discharge energy, reduce the complexity of the electrode structure, reduce the size of the power supply, and promote its application in the field of industry and scientific research

[0004] Article Document 1 describes a nanosecond pulse superimposed DC electrode structure, but this electrode structure separates the DC electrode from the pulse electrode, which increases the complexity of the device; Patent Document 1 provides a chip-controlled DC superimposed Pulse type metal surface treatment power supply circuit, but the device uses a large number of power electronic devices to control the circuit, these power electronic components are extremely vulnerable to the electromagnetic interference generated by the discharge of the circuit itself during work, and the reliability is greatly reduced

Patent Document 2 provides a high-voltage pulse superimposed DC electric field generator based on IGBT series connection, but the device uses an IGBT single-tube series circuit to generate high-voltage pulses, but the IGBT synchronous trigger control circuit is relatively complicated, and its output pulse high-voltage voltage is up to 10kV , in addition, its high-voltage pulse rise time and pulse width are long, which is not suitable for ignition under high-speed airflow

The plasma generating devices described above are either bulky and complex in structure, or have low stability and complicated control

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