High-frequency high-voltage power supply with spark breakdown fast shutdown circuit

Abstract

The invention discloses a high-frequency high-voltage power source capable of rapidly switching off a circuit when spark breakdown occurs. The high-frequency high-voltage power source is provided with a CPU. The CPU controls a triggering driving unit to drive a high-frequency converting unit, and the output of the high-frequency converting unit is connected with a high-frequency boosting unit. The high-frequency high-voltage power source is characterized in that a sampling circuit connected with output current of the high-frequency boosting unit is arranged, and the output of the sampling circuit is connected with a spark signal latch and processing circuit sequentially through a primary voltage follower circuit, a primary signal high-speed isolation circuit, a secondary voltage follower circuit, a high-speed voltage comparison circuit and a secondary signal high-speed isolation circuit; one output path of the spark signal latch and processing circuit is connected with the CPU, and the other output path of the spark signal latch and processing circuit is connected with the triggering driving unit; the CPU controls the triggering driving unit through the spark signal latch and processing circuit.

Description

Technical field [0001] The invention relates to a high-frequency high-voltage power supply for a high-voltage electrostatic precipitator, in particular to a high-frequency high-voltage power supply that can reliably detect spark breakdown in time and quickly turn off IGBTs, and can latch the short-term signal of spark breakdown for subsequent spark interruption Treatment to avoid arcing, shorten the time from spark breakdown to voltage rise again to the maximum value, improve system stability and dust removal efficiency, and avoid waste of electric energy. High-frequency high-voltage power supply with spark breakdown fast shut-off circuit. Background technique [0002] The high-voltage electrostatic precipitator is a dust removal device that deposits charged dust particles on the electrode under the action of a high-voltage electric field, thereby separating the dust particles from the dust-containing gas. It has been widely used in electric power, metallurgy, building materials, ...

AI Technical Summary

Problems solved by technology

Since the output current only increases temporarily when the spark breaks down at the output end, the existing high-frequency high-voltage power supplies cannot guarantee to capture the spark breakdown signal in a timely and accurate manner at the moment of the spark breakdown of the high-frequency power supply. The occurrence of spark breakdown can be detected by the long-term arcing characteristics that have appeared inside the dust collector, and then the spark interruption processing of the software is performed by the CPU

Long-term arcing of the equipment not only reduces the dust removal efficiency and causes waste of electric energy, but also has the risk of equipment damage

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