High-frequency power supply inversion system with soft switching characteristic

Abstract

The invention discloses a high-frequency power supply inversion system with a soft switching characteristic. The high-frequency power supply inversion system comprises a full-bridge inversion circuitmodule and an LCC parallel resonance circuit module with the soft switching characteristic, wherein the full-bridge inversion circuit module serves as a core component of a high-frequency power supplyfor electric precipitation and controls voltage output of the high-frequency power supply device, and the LCC parallel resonance circuit module with the soft switching characteristic is connected tothe output end of the full-bridge inversion circuit module in series. The switching loss of IGBT components in the full-bridge inverter circuit module can be reduced, and hidden dangers caused by electromagnetic interference are avoided. The LCC resonance circuit is formed by additionally arranging some small-capacity capacitors and small-capacity inductors, and the LCC parallel resonance circuitis introduced into the electrostatic precipitation high-frequency power supply inverter circuit, so that the effect of assisting a current conversion system to reduce switching loss is achieved.

Description

technical field [0001] The invention relates to a high-frequency power inverter system with soft switching characteristics, in particular to an LCC parallel resonant circuit introduced into an electric dust removal high-frequency power inverter circuit to jointly form a high-frequency power inverter system with soft switching characteristics . Background technique [0002] Most traditional electrostatic precipitators use thyristor industrial frequency power supply, which has the disadvantages of large output DC pulsation, low energy conversion efficiency, unbalanced three-phase output voltage, and large flashover impact on electrical equipment. As a new type of high-power DC power supply, the high-frequency power supply for electrostatic precipitator uses IGBT and other high-power switching electronic components to replace traditional thyristor power frequency electronic components. Compared with traditional power frequency power supplies, it has output High voltage level, ...

AI Technical Summary

Problems solved by technology

The hard switching operation of the inverter circuit will cause the temperature of the IGBT switching components to rise, causing the switching loss of the IGBT components to further increase, and in severe cases, the entire circuit will be burned

In addition, the hard switching operation of the inverter circuit will also cause electromagnetic interference in the control system, which will bring hidden dangers to the stable operation of the entire high-frequency power supply control system.

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