Electrical sheet steel magnetostriction measurement system and method

Abstract

The invention relates to an electrical sheet steel magnetostriction measurement system and method. A computer controls an arbitrary waveform generator to produce waveforms, the arbitrary waveform generator is controlled to change the waveforms according to data uploaded by a multi-channel data acquisition unit, an iterative algorithm is utilized to obtain expected waveforms of magnetic polarization intensity induced voltage, and a magnetostriction loop line of a measured sample is further calculated. A power amplifier performs amplification processing on a received signal, and an excitation device fixes the measured sample to enable the measured sample to work in the closed magnetic circuit condition and exerts stress in the magnetization direction. A laser vibration measurement instrument is used for measuring the vibration speed. The multi-channel data acquisition unit is used for acquiring voltage, current and the vibration speed. The electrical sheet steel magnetostriction measurement system and method achieves measurement of the electrical sheet steel magnetostriction loop line under the conditions of the closed magnetic circuit and the stress, meets a general using environment of an electrical sheet steel, utilizes the iteration method to enable the magnetic polarization intensity induced voltage waveforms to be sine waves, replaces a traditional analog feedback loop and has the advantages of being not prone to oscillation, wide in frequency range and the like.

Description

technical field [0001] The invention relates to the field of measuring magnetic properties of magnetic materials, in particular to a magnetostrictive measuring system and method for electrical steel sheets. Background technique [0002] Electrical steel sheet is a soft magnetic alloy with excellent performance, including silicon steel sheet, permalloy, amorphous and nanocrystalline materials, and is an indispensable and important magnetic material in various motors and transformers. The magnetostriction of electrical steel sheet refers to the phenomenon that its volume changes with the change of alternating magnetic field under the action of alternating magnetic field. It not only brings environmental noise pollution, but also causes heating of the iron core, and even produces resonance, causing power equipment failure. The magnetostriction coefficient of electrical steel sheets has become an important performance index of transformers and motors. my country is the largest ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a magnetostrictive measurement system and method for electrical steel sheets to solve the problem of magnetostrictive measurement, improve the capacity of electrical steel sheet quantity transmission and quality inspection in my country, and meet the requirements of high High-performance electrical steel and other new material technology fields, the advanced manufacturing industry of large-scale generators and transformers used in major national power projects, and the urgent need for analysis and measurement methods

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