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Method of controlling high frequency switch power source by applying digital technology on constan potential instrument

A high-frequency switching power supply and digital control technology, which is applied in the direction of converting irreversible DC power input into AC power output, can solve the problems of poor reliability and low control precision, and achieve convenient operation, improved control precision and high power. Effect

Inactive Publication Date: 2006-06-14
QINGDAO YAHE SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In use, it is found that although the volume and weight of this type of potentiostat are reduced, the reliability is poor and the control accuracy is low, which cannot meet the needs of the actual site.

Method used

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  • Method of controlling high frequency switch power source by applying digital technology on constan potential instrument
  • Method of controlling high frequency switch power source by applying digital technology on constan potential instrument

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Embodiment Construction

[0014] The present invention and its applications will be further described below in conjunction with the contents shown in the accompanying drawings.

[0015] The potentiostat circuit of the present invention is composed of an AC power supply rectification filter circuit 1, an inverter circuit 6, a high-frequency rectification filter circuit 8, an integrated operation display control circuit 9, a feedback signal isolation analog / digital conversion circuit 2, and an isolation pre-drive circuit 4. The power semiconductor drive circuit 5 and the power semiconductor overcurrent protection circuit 7 are composed of a digital pulse modulation control method that compares the reference potential E with the preset potential to determine the pulse width for the inverter circuit to be turned on. After the drive circuit 4 is amplified, it drives the power semiconductor drive circuit 5 to control the inverter circuit 6 so that it outputs a current that meets the needs of protecting the ca...

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Abstract

The invention relates to a method for digital control high frequency switching power supply technique in constant potential apparatus. It belongs to cathode protection technique field. The invention is made up of ac power supply rectification filter circuit, inverter circuit, high frequency rectification filter circuit, synthesis operation display control circuit, feedback signal isolation A / D conversion circuit, isolation predrive circuit, power semiconductor drive circuit, power semiconductor overflow protection circuit, and high speed digital control pulse modulation unit. The constant potential apparatus has the effects of large power, high efficiency, small volume, light weight, and so on. The invention can improve control accuracy and efficiency, reduce volume-weight and heating, improve complete machine reliability of the constant potential apparatus.

Description

technical field [0001] The invention relates to a method for applying digitally controlled high-frequency switching power supply technology to a potentiostat applied to an impressed current cathodic protection system, and belongs to the technical field of impressed current cathodic protection. Background technique [0002] The potentiostats that are usually used in petroleum, petrochemical, electric power, ports, ships, offshore platforms and municipal projects for cathodic protection are generally thyristor constant and magnetic saturation potentiostats. In use, it is found that the existing potentiostats of this type have low efficiency, large volume, heavy weight, power frequency noise during operation, poor reliability of the control circuit, almost discontinuous current in the load, and poor electrical performance when outputting a small current. Problems make this type of potentiostat gradually unable to meet the actual needs of engineering appl...

Claims

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Application Information

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IPC IPC(8): C23F13/02C23F13/04H02M7/48
Inventor 仲维滨闫永贵孙勤李亮姜明建
Owner QINGDAO YAHE SCI & TECH DEV
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