Analog and digital signal conditioning circuit for electrostatic dedusting power control system

Abstract

The invention discloses an analog and digital signal conditioning circuit for an electrostatic precipitating power supply control system, which includes an analog circuit part and a digital circuit part. The analog circuit part is used to collect and receive analog signals such as voltage, current, and temperature of the main circuit of the power supply, and perform conditioning, filtering, buffering, and photoelectric isolation on related signals; It is used to collect and receive switching signals such as the working state and fault state of the main circuit of the high-frequency power supply, and transmit control quantities such as control logic quantities and PWM waves. The two parts of the circuit are physically isolated, and each has an independent ground wire and power supply. The invention integrates the analog and digital circuits, completes the acquisition, conditioning and isolation of analog and digital signals, reduces the interference of power lines and ground wires, reduces the interference of high-frequency digital circuits to analog circuits, and improves the working stability. Reduced costs.

Description

technical field [0001] The invention belongs to integrated circuit design technology, in particular to an analog and digital signal conditioning circuit used in an electrostatic precipitator power supply control system. Background technique [0002] With the rapid development of my country's economy, the scale of industrial production has expanded rapidly. Environmental problems such as serious smog and excessive PM2.5 concentration have seriously affected people's health, and at the same time restricted the further development of industrialization. The main reason for this series of phenomena is the smoke (powder) dust that is discharged into the air without treatment during the industrial production process, so industrial dust removal technology has attracted more and more attention. [0003] The basic principle of the electrostatic precipitator is to make the dust-containing gas pass through a high-voltage electric field, so that the suspended particles are charged and t...

AI Technical Summary

Problems solved by technology

[0004] In the traditional high-frequency high-voltage electrostatic precipitator power supply control system, the analog signal conditioning circuit and the digital signal conditioning circuit are often designed separately, which will increase the cost of the system and is not conducive to the integration and miniaturization of the control system

And more circuit board connections means higher failure rate, so that the stability of the system cannot be further improved

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