A method for measuring magnetic properties of magnetic materials by improving the sinusoidality of magnetic polarization intensity waveform

In the measurement of AC magnetic properties of magnetic materials, the harmonic component of the secondary coil induced voltage is used as the feedback amount to form a closed-loop method to compensate the third harmonic input voltage, which solves the problem of unstable sine degree of the magnetic polarization intensity waveform, and improves the measurement accuracy and speed.

CN119375794BActive Publication Date: 2025-03-18QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD +1
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Patent Information

Application Number
CN202411622997.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-14
Publication Date
2025-03-18
Estimated Expiration
2044-11-14

AI Technical Summary

Technical Problem

In the existing methods for measuring AC magnetic properties of magnetic materials, it is difficult to maintain the sine degree of the magnetic polarization intensity waveform, resulting in harmonic components in the induced voltage, affecting the accuracy of the measurement results.

Method used

By forming a closed-loop method by the harmonic component in the secondary coil induced voltage as a feedback amount, the compensation of the third harmonic input voltage is realized, the harmonic component of the secondary coil induced voltage is suppressed, and the magnetic polarization intensity and the sine of the induced voltage are improved.

Benefits of technology

It effectively improves the accuracy of AC magnetic properties measurement of magnetic materials and reduces measurement time. It is suitable for fast and accurate AC magnetic properties measurement of magnetic materials with multiple operating points.

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Abstract

The present invention proposes a method for measuring the alternating current magnetic properties of magnetic materials by improving the sinusoidality of the magnetic polarization intensity waveform, which belongs to the technical field of magnetic material magnetic property measurement. It can solve the technical problems that the method of improving the sinusoidality of the magnetic polarization intensity waveform through a programmable input power supply is difficult to ensure that a good measurement effect is maintained at different measurement points, the measurement process takes a long time, and it is difficult to achieve ideal measurement conditions. The technical scheme includes the following steps: measuring the current value of the primary coil, and obtaining the frequency, angle and third harmonic current angle of the fundamental current; measuring the induced voltage value of the secondary coil, and obtaining the virtual axis induced voltage value of the secondary coil; extracting the harmonic components in the induced voltage of the secondary coil; calculating the third harmonic voltage value that needs to be compensated in the primary coil input voltage, and outputting it through a programmable power supply. The present invention can be applied to improving the sinusoidality of the magnetic polarization intensity waveform in the measurement of the alternating current magnetic properties of magnetic materials.
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