An anti-interference adjustable giant magnetoresistance effect current sensor

Abstract

The invention relates to an anti-interference adjustable giant magnetoresistance effect current sensor, comprising a giant magnetoresistance effect chip, a permanent magnet arranged parallel to the giant magnetoresistance effect chip, a spiral micrometer, an insulating baffle, a casing and a signal processing circuit, The signal processing circuit is connected with the giant magnetoresistance effect chip; the giant magnetoresistance effect chip and the permanent magnet are fixed vertically in the casing, the front end of the measuring rod of the spiral micrometer vertically penetrates into the casing, and the front end of the measuring rod of the spiral micrometer An insulating baffle is vertically fixed, and the insulating baffle and the giant magnetoresistance effect chip are arranged in parallel, and the giant magnetoresistance effect chip is placed between the insulating baffle and the permanent magnet; the outer wall of the energized wire to be tested is crimped with the insulating baffle, The crimping point is the connecting point between the screw micrometer and the insulating baffle. The invention can flexibly adjust and measure the distance between the giant magnetoresistance effect chip and the conducting wire to be tested by arranging a spiral micrometer on the giant magnetoresistance effect current sensor, thereby improving the accuracy of the measurement result of the current sensor.

Description

technical field [0001] The invention relates to the technical field of power system measurement, in particular to a clip-type anti-interference adjustable giant magnetoresistance effect current sensor. Background technique [0002] With the continuous development of power electronics technology, people have higher and higher requirements for the reliability and convenience of current sensors. The traditional electromagnetic current transformer is based on the coil principle and measures the current through the induction of the coil. This type of coil winding current transformer has a large volume, a narrow frequency band, a large consumption of metal resources, and high insulation requirements, and can only measure AC current. It cannot measure DC, transient and high-order harmonic signals, and cannot be applied to large-scale distributed monitoring. The current fiber-optic current sensors have complex structures and high manufacturing costs, making it difficult to apply th...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing giant magnetoresistance effect current sensor cannot flexibly adjust and measure the distance between the giant magnetoresistance effect chip and the conducting wire to be tested

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