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High voltage dust removal top rapping control main circuit based on PWM technology

A PWM technology, high-voltage dust removal technology, applied in the controller with pulse train output signal, power supply technology, electric controller and other directions, can solve the problems of low control accuracy, frequent system maintenance, short service life, etc. Good power supply overcurrent protection function, long service life effect

Inactive Publication Date: 2008-06-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the short service life, low control precision and frequent system maintenance of the existing high-voltage dust removal top rapping control main circuit, the present invention provides a high-voltage dust removal top rapping based on PWM technology with long service life and high control precision. control main circuit

Method used

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  • High voltage dust removal top rapping control main circuit based on PWM technology
  • High voltage dust removal top rapping control main circuit based on PWM technology
  • High voltage dust removal top rapping control main circuit based on PWM technology

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] refer to figure 1 , figure 2 , image 3 , a high-voltage dust removal top rapping control main circuit based on PWM technology, including a power supply circuit, a pulse rapper control circuit, and a rapper matrix. The power supply circuit includes a bridge rectifier circuit connected to an AC power supply, a filter capacitor C and sampling resistance R, the described pulse rapper matrix is ​​an 8×8 pulse rapper matrix; the described rapping control circuit also includes a PWM pulse row and column distribution circuit, and the described PWM pulse row and column distribution The drive circuit includes a row allocation isolation drive sub-circuit, a column allocation isolation drive sub-circuit,

[0018] The row allocation isolation driving sub-circuit includes a three-eight decoder 74LS138, an optocoupler driver chip TLP250 and a field effect transistor IRF46...

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PUM

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Abstract

Disclosed is a top vibrating control main circuit in high voltage dedusting base on PWM technology, comprising a power supply circuit, a pulse vibrator control circuit and a vibrator matrix circuit. The power supply circuit includes a bridge rectification circuit connected with the alternating current power, a filter capacitor C and a sampling resistance R, the pulse vibrator matrix is a 8 X 8 pulse vibrator matrix; the vibrating control main circuit also includes a PMW pulse row-column distribution circuit; the PWM pulse row-column distribution circuit includes a row distribution separation drive circuit and a column distribution separation drive circuit; the output of the row distribution separation drive circuit is connected with the row line of the 8 X 8 pulse vibrator control circuit matrix; the output of the column distribution separation drive circuit is connected with the column line of the 8 X 8 pulse vibrator control circuit matrix. The invention provides a top vibrating control main circuit in high voltage dedusting based on the PWM technology with high control precision and long service life.

Description

(1) Technical field [0001] The invention relates to a high-voltage dust removal top rapping control main circuit. (2) Background technology [0002] The main circuit of high pressure dust removal top rapping control is mainly used for the main circuit in the high pressure dust removal top rapping control system of cement plant, thermal power plant and chemical plant. [0003] There are two main types of traditional high-voltage dust removal top rapping control systems. One is to use thyristor control technology to realize the non-contact control of the rapper matrix. The core of this technology is to realize the voltage by controlling the conduction angle of the thyristor. The problem of this system is that the zero-crossing trigger of the conduction angle has a hysteresis effect and is susceptible to false triggering caused by the interference of the power grid, resulting in a decrease in the control accuracy of the rapper. The second type is to use PWM control technology ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C3/68B03C3/74G05B19/02G05B11/28
Inventor 王涌
Owner ZHEJIANG UNIV OF TECH
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