Insulated gate bipolar translator (IGBT) series connection type high-voltage pulse generator

Abstract

The invention discloses an insulated gate bipolar translator (IGBT) series connection type high-voltage pulse generator. The voltage is provided for the high-voltage pulse generator by a high-voltage power supply, and after the energy storage of an energy storage capacitor, high-voltage pulses are generated through a multistage IGBT series connection circuit. A programmable logic controller (PLC) generates pulse-width modulation (PWM) control pulses, the PWM control pulses are input into an optical fiber isolation circuit after passing through a PWM amplification circuit, further, the IGBT series connection circuit is driven, and the power supply required by the work of the IGBT series connection circuit is provided by a secondary circuit of the isolation power supply connected with the IGBT series connection circuit. Commercial electricity is changed into direct current through a rectifying circuit and a filter circuit, the direct current is changed into high-frequency square waves through a high-frequency power metal-oxide-semiconductor field-effect transistor (MOSFET) full-bridge inverter circuit driven by a power MOSFET driving circuit, and the high-frequency square waves are input into the secondary circuit of the isolation power supply after being isolated by a series connection magnetic ring circuit. When the IGBT series connection circuit generates faults, fault signals are input into the PLC through a fault output circuit and an optical fiber feedback circuit, the PLC interrupts control signals so that the IGBT series connection circuit is in a switch-off state, and the whole system is further protected.

Description

technical field [0001] The invention relates to a high-voltage pulse generator, in particular to an IGBT series high-voltage pulse generator. Background technique [0002] Pulse power technology is a technology that applies the stored energy to the load in the form of electric energy with a single pulse or a short pulse with a repetition frequency. It is currently widely used in radar transmitters, high-voltage pulse electric field sterilization, and electric pulse crushing of insulating materials. A series of military, energy, materials, biological fields. The key to realizing this technology is to design a high-voltage, high-power high-voltage pulse generator. There are roughly two ways to generate high-voltage pulses: one is to convert a relatively low DC power into a low-voltage pulse, and then obtain a high-voltage pulse through a pulse booster; the other is to use a high-voltage DC power supply and use a pulse energy storage capacitor energy, and then turn it into a ...

AI Technical Summary

Problems solved by technology

The former mainly realizes the closed-loop control of each IGBT drive signal through a monitoring circuit with nanosecond response speed, which has high control precision and complex circuit structure.

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