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Connection method of alternating current 90-degree phase difference circuit for magnetic particle flaw detector

A technology of magnetic particle flaw detection and connection method. It is applied in the direction of conversion equipment that can be converted into DC without intermediate conversion. It can solve the problems of no display and unclear crack display, and achieve the effect of improving the neutral point offset.

Pending Publication Date: 2021-10-26
LUOYANG LYC BEARING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the current is used to compound the magnetization of the workpiece, the generated compound rotating magnetic field vector is a long ellipse, which will make the cracks on the surface of the tested workpiece along a certain direction displayed unclear or not displayed, etc.

Method used

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  • Connection method of alternating current 90-degree phase difference circuit for magnetic particle flaw detector
  • Connection method of alternating current 90-degree phase difference circuit for magnetic particle flaw detector
  • Connection method of alternating current 90-degree phase difference circuit for magnetic particle flaw detector

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Embodiment Construction

[0021] The present invention can be explained in more detail by the following examples, and the present invention is not limited to the following examples;

[0022] In describing the present invention, it is to be understood that the terms "central", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", The orientation or positional relationship indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and "side" are based on the attached figure 1 The orientations or positional relationships shown are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred equipment or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the present invention. limits.

[0023] In the description of the present invention, it should also be noted that, unless otherwise ...

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Abstract

The invention discloses a connection method of an alternating-current 90-degree phase difference circuit for a magnetic particle flaw detector, and relates to the technical field of magnetic particle flaw detectors. A circumferential phase-shifting transformer T1, a longitudinal output transformer T2 and a three-phase alternating-current power supply are adopted for two paths of magnetizing current, and a three-phase T-shaped connection method is adopted for the circumferential phase-shifting transformer T1 and the longitudinal output transformer T2; and the phase difference of two alternating magnetic fields is changed into 90 degrees, so that three-phase current operates in a balanced manner, the effect of neutral point offset of a three-phase power supply is effectively improved, the Lissajous graph of the three-phase alternating magnetic field generator is represented as a circle, the magnetic field intensity at each moment in the 360-degree direction of a circle is uniform and consistent, defect magnetic traces can be uniformly displayed, and the three-phase alternating magnetic field generator is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of magnetic particle flaw detectors, in particular to a connection method for an AC 90° phase difference circuit of a magnetic particle flaw detector. Background technique [0002] It is known that magnetic particle flaw detection is one of the five conventional detection methods in the non-destructive testing industry. This type of equipment is generally composed of a circumferential magnetization power supply, a longitudinal magnetization power supply, a parts clamping device, and a magnetic powder application device. In the non-destructive testing of workpieces, in order to improve the efficiency of magnetic particle testing, it is very common to use two alternating currents with different phases for composite magnetization testing. That is, two AC mains with a phase difference of 120° are used to generate a magnetic field with a phase difference of 120° to demagnetize the workpiece. During the actual fl...

Claims

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Application Information

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IPC IPC(8): H02M5/10
CPCH02M5/10
Inventor 陈翠丽于海波尤蕾蕾焦阳陈小超时可可温景波倪滨昆李昭昆史亚妮杨争
Owner LUOYANG LYC BEARING
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