Multi-level spark detection system with locking function

Abstract

The invention discloses a multi-energy level spark detection system with a locking function and aims to solve the technical problems that when an electrostatic dust collector causes electric spark discharge, as a high-voltage power supply cannot be timely cut off, a power module and a power pipe are damaged. The multi-energy level spark detection system comprises a sampling circuit, a conditioning circuit, a comparator, a spark energy level judging circuit and a locking circuit which is used for locking output of the high-voltage power supply, wherein the spark energy level judging circuit comprises a CPLD (complex programmable logic device) control chip; a dithering elimination circuit, a delay circuit and a spark detection control circuit are integrated in the CPLD control chip. According to the multi-energy level spark detection system, the power pipe can be reliably locked to drive an enable signal, and a power supply of an overcurrent load can be instantaneously cut off, so that safe and stable operation of the high-voltage power supply is guaranteed; the dithering elimination circuit, the delay circuit and the spark detection control circuit are integrated in the CPLD control chip, so that the integrity is high, the flexibility of a control system is improved, and debugging and equipment upgrading are facilitated.

Description

technical field [0001] The invention relates to a multi-energy-level spark detection system with a locking function, in particular to a spark energy-level detection system during spark discharge in an electrostatic precipitator, and belongs to the field of electronic technology. Background technique [0002] With the rapid development of power electronics technology, high-power devices such as MOSFETs and IGBTs, which are key technologies, are widely used in various fields such as communications and electronics because of their excellent high-frequency switching characteristics. However, as a high-power composite device, they have a weak ability to withstand short-term overload. When the energy in the tube is accumulated due to overvoltage or overcurrent during operation, it is very easy to cause avalanche and damage the device. Therefore, in practical applications, overcurrent protection technology has always been the key to the reliable and stable operation of power devic...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a multi-level spark detection system with a locking function, and solve the problem that the high-voltage power supply is not disconnected in time when the electric spark discharge occurs in the electrostatic precipitator in the prior art, resulting in The technical problem that the power module and power tube are easily damaged

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