Magnetic steel performance testing method

Abstract

A method for detecting the performance of magnetic steel is provided, by initially selecting the magnetic steel to be measured; making a fixture for measuring the magnetic flux coil, recording the number of coil turns of the fixture; clamping the preliminary selected magnetic steel to be measured between the poles of the magnetizer Magnetization: put the magnetic steel to be measured that has been magnetized into the flux measuring coil fixture, connect the flux measuring coil fixture with the digital fluxmeter, press the reset button of the digital fluxmeter to make the digital fluxmeter display When the data is zero, remove the magnetic steel to be measured from the flux measuring coil fixture, and the digital fluxmeter obtains the change of magnetic flux through data processing, and the change is directly displayed on the digital fluxmeter; calculate the magnetic steel to be measured according to the formula The open circuit flux Mx. By accurately measuring the open-circuit magnetic flux Mx of the magnet, the invention indirectly realizes the optimization of the magnet material whose coercive force meets the product performance, controls the material quality of the parts from the source, meets the performance requirements of the product, improves production efficiency, and improves product quality. quality.

Description

technical field [0001] The invention relates to a method for detecting the performance of magnetic steel, which is mainly applicable to the galvanometer of the magnetoelectric system. Background technique [0002] In production, magnetoelectric galvanometers often have the problem that the performance of the magnet steel is weak and the performance of the galvanometer is unqualified. This problem has plagued production for a long time. In order to reduce the occurrence of this problem, the main measure now is to use a magnetizer to magnetize multiple times to strengthen the magnetism. The disadvantages of this method are: the performance of the magnetic steel weakens too quickly, and the number of times of magnetization is too many. The method of multiple magnetization cannot fundamentally solve the problem of weak magnetic properties of the magnetic steel, and cannot fundamentally improve product quality. Of course, the above problem of multiple magnetization can be solved...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the performance of the magnetic steel weakens too quickly, and the number of magnetization is too many. The method of multiple magnetization cannot fundamentally solve the problem of weak magnetic properties of the magnetic steel, and cannot fundamentally improve product quality.

Of course, the above problem of multiple magnetization can be solved by selecting a material with good performance as the magnet of the galvanometer, but the selection of the material performance of the magnet is more difficult. For example, the material of the magnet BD2001 in the BD-1 galvanometer is LNGT32 aluminum For nickel-cobalt alloy, the required coercive force Hc is not less than 79.6KA / m, and the magnet steel with greater coercive force can improve the performance of the ammeter, but because the coercive force Hc is the remanence of the permanent magnet magnetized to saturation The reverse magnetic field strength required to reduce B to zero is a measure of the magnetic durability and magnetic strength of the magnetic steel, and it is difficult to achieve direct measurement

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