IGBT (Insulated Gate Bipolar Translator) driving circuit for novel high-frequency high-voltage switching power supply

Abstract

The invention relates to an IGBT (Insulated Gate Bipolar Translator) driving circuit for a novel high-frequency high-voltage switching power supply, comprising a switching control circuit (1), a pulse transformer isolating circuit (2) and a voltage stabilizing circuit (3); a front controller MCU (Microprogrammed Control Unit) generates an IGBT driving signal and inputs into a high-speed two-circuit in-phase driver MC33152; an output end is connected with a primary circuit of the pulse transformer isolating circuit, and is isolated by the pulse transformer isolating circuit and transmitted to a secondary circuit; the output of the secondary circuit of the pulse transformer is connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit is respectively connected with the gate and emitter of the IGBT. The invention has the following characteristics of small voltage fluctuation of an input stage, quick switching response, low power consumption of switching on and off and complete isolation between the input stage and the gate, and a series resistor in the voltage stabilizing circuit can effectively inhibit high-frequency parasitic oscillation, thus effectively reducing the mutual interference between the driving circuit and the IGBT, improving the accuracy of the IGBT driving signal, and ensuring more reliable, safe and accurate driving control of the IGBT.

Description

1: Technical field [0001] The invention relates to an IGBT driving circuit for a switching power supply, in particular to an IGBT driving circuit for a high-frequency and high-voltage switching power supply for a high-power electrostatic precipitator. 2: Background technology [0002] With the expansion of human production scale, air pollution tends to be serious. Dust is one of the main pollutants that cause air pollution. Industries such as coal processing, mining, electric power, metallurgy, oil refining, chemical industry, and papermaking are all sources of dust emissions. Electrostatic precipitators can effectively reduce dust emissions in industrial production, and the recovered dust contains a large amount of precious materials such as metals, thereby effectively reducing the loss of a large amount of precious metal materials. At present, most of the electrostatic precipitators used in my country are powered by industrial frequency power supplies, which have obvious ...

AI Technical Summary

Problems solved by technology

At present, most of the electrostatic precipitators used in my country are powered by industrial frequency power supplies, which have obvious disadvantages such as low dust removal efficiency, high energy consumption, small power factor, and long response time.

The high-frequency high-voltage electrostatic dust removal power supply overcomes the shortcomings of the power frequency switching power supply. It can provide almost flat corona voltage and fast response time, and has obvious advantages such as high dust removal efficiency, small resistance loss, high temperature resistance, and large flue gas treatment capacity. , so it has a good application prospect. The core of the high-frequency high-voltage switching power supply is the inverter circuit using IGBT as the switching device. Most of the IGBT drive circuits in the existing high-power switching power supply applications are extremely susceptible to interference, safety and stability. low disadvantage

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