DC fly-back pulse degaussing main control circuit

A main control circuit, pulse-type technology, applied in the field of circuits, can solve the problem that the degaussing efficiency needs to be improved, etc.

Inactive Publication Date: 2019-09-10
LANGFANG DEV ZONE RUIYAN ELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the inventors found that the DC degaussing technology in the prior art simply generates a reverse excitation magnetic field, and its degaussing efficiency needs to be improved

Method used

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  • DC fly-back pulse degaussing main control circuit
  • DC fly-back pulse degaussing main control circuit
  • DC fly-back pulse degaussing main control circuit

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Embodiment Construction

[0033] As stated in the background technology of this application, in the prior art, the AC degaussing needs to degauss the entire pipeline, and the degaussing of the entire tens of kilometers of pipelines, in addition to the huge workload, the timeliness of maintenance and emergency repairs is also very important. Not allowed. Although the DC degaussing in the prior art adopts the reverse excitation magnetic field with the opposite direction and equal size to offset the original pipeline magnetic field, so that the welding part does not appear magnetic to the outside, so that the magnetism of the whole pipeline does not need to be eliminated, which greatly reduces the work. quantity. However, the DC degaussing technology in the prior art only simply generates a reverse excitation magnetic field, and its degaussing efficiency needs to be improved.

[0034] The inventor of this application proposes a DC flyback pulse type degaussing device. Compared with pure DC degaussing, th...

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PUM

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Abstract

The invention discloses a DC fly-back pulse degaussing main control circuit, which is applied to a degaussing device. The DC fly-back pulse degaussing main control circuit is characterized by comprising a reference voltage generation circuit, an oscillation circuit, an intermittent stage adjustment circuit and an output circuit, wherein the reference voltage generation circuit is used for receiving a grid power source and converting the grid power source into a reference voltage source, the oscillation circuit is used for receiving the reference voltage source and outputting an oscillation voltage to the intermittent stage adjustment circuit, the intermittent stage adjustment circuit is used for adjusting the oscillation voltage when detecting that the output of the oscillation voltage isnot stable, and the output circuit is used for receiving the adjusted oscillation voltage and outputting a pulse signal. Thus, the DC fly-back pulse degaussing device can output qualified DC pulse signals and work stably and reliably, and the degaussing efficiency can be improved.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a DC flyback pulse type degaussing main control circuit Background technique [0002] During the operation of long-distance oil and gas pipelines, due to geomagnetic interference, magnetic flux leakage detection and other processes, the in-service pipelines are often magnetized. During maintenance and welding, if the residual magnetism of the magnetic long-distance pipelines cannot be eliminated in time, magnetic deviation will occur. Blowing will affect the welding quality, or even make it impossible to weld. In order to stabilize the welding process and improve the quality of welded joints, the magnetized steel pipe should be demagnetized with a demagnetizer before welding. At present, there are basically two ways of degaussing, namely AC degaussing and DC degaussing. AC degaussing is to use a constantly changing alternating magnetic field to overcome the intrinsic coercive force of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M9/06H03K3/02H01F13/00
CPCH01F13/006H02M11/00H03K3/02
Inventor 白国义陈欣马振李雪松马超姚鑫李磊王建立
Owner LANGFANG DEV ZONE RUIYAN ELECTRONIC TECH CO LTD
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