Magnetic property detection and analysis method of permanent magnet material for motor

A technology of permanent magnet materials and analysis methods, applied in the direction of magnetic performance measurement, magnetic susceptibility measurement, etc., can solve the problems of insufficient precision, performance degradation of motors and other products, scrapping, etc., to achieve the effect of improving measurement accuracy

Inactive Publication Date: 2018-11-23
芜湖衡西微量计量科技有限公司
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Problems solved by technology

[0003] However, due to the influence of the preparation process, the inhomogeneity of the properties of permanent magnet materials exists widely, especially the inhomogeneity of high-temperature magnetic properties is more prominent, which often leads to the loss of magnetism in the use of materials, resulting in poor performance of motors and other products. fall, or even be scrapped;
[0004] At present, in the field of permanent magnet material detection, Gaussmeter and fluxmeter commonly used in simple measurement are convenient and fast, but the accuracy is not enough

Method used

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  • Magnetic property detection and analysis method of permanent magnet material for motor
  • Magnetic property detection and analysis method of permanent magnet material for motor
  • Magnetic property detection and analysis method of permanent magnet material for motor

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specific Embodiment 1

[0028] see Figure 1-2 As shown, the present invention is a method for detecting and analyzing the magnetic properties of permanent magnet materials for motors, comprising the following steps:

[0029] Step 1, performing saturation magnetization on the permanent magnet material to be tested through the magnetization device, the magnetization device is composed of the magnetic track 3, the pole head 6 and the magnetization winding 1; the magnetic track 3, the pole head 6 and the permanent magnet material 5 to be tested form a closed loop; Wherein, the pole faces of the pole head 6 are parallel to each other and perpendicular to the direction of the magnetic field; the magnetizing winding 1 is respectively arranged on both sides of the permanent magnet material 5 to be tested; the permanent magnet material 5 to be tested is wound with a magnetic induction intensity B measuring line 4; the magnetic induction intensity B The measuring line 4 is connected with the measuring instrum...

specific Embodiment 2

[0041] Such as image 3 As shown, the curve 1 is the intrinsic hysteresis curve, and the curve 2 is the B—H hysteresis loop; the demagnetization curve consists of four parts; the first part is the AC stage, when the magnetization field is reduced from point A to zero, every The magnetic moment of a grain is rotated to the easy magnetization direction of the grain closest to the external magnetic field. In the process of reducing the magnetization field to zero, new reverse magnetization domains may be generated inside the ferromagnet;

[0042] The second part is the CS stage, which may be the rotation process of the magnetic moment or the small Barkhausen jump of the domain wall;

[0043] The third part is the SD stage, which is the irreversible big Barkhausen jump;

[0044] The fourth part is the DE stage, which is the process of turning the magnetic moment to the direction of the reverse magnetization field; in the measurement and calculation, for the sake of simplicity, the...

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Abstract

The invention discloses a magnetic property detection and analysis method of a permanent magnet material for a motor. The method comprises the following steps of subjecting a permanent magnet materialto be detected to saturated magnetization by a magnetization device and measuring the magnetization curve of the permanent magnet material to be detected; measuring the permanent magnet material to be detected by a measuring device; measuring a B signal and an H signal; inputting measured signal values into a computer, changing a magnetization current value in different ways, and drawing the demagnetization curve and the hysteresis loop of the permanent magnet material to be detected. The method measures the magnetic field strength, the magnetic induction intensity and the polarization intensity of the permanent magnet material to be detected by the measuring device, measures the complete parameter of the permanent magnet material to be detected, displays the demagnetization curve and thehysteresis loop of the permanent magnet material to be detected by the computer; improves the accuracy of magnetic performance detection, and avoids the use of permanent magnet materials with unqualified magnetic properties in the production of motors.

Description

technical field [0001] The invention belongs to the field of permanent magnet material detection, in particular to a method for detecting and analyzing the magnetic properties of permanent magnet materials used in motors. Background technique [0002] Permanent magnet materials are widely used in electronic information, electromechanical, instrumentation and medical equipment and other fields, especially rare earth permanent magnets represented by NdFeB permanent magnet materials, which have high magnetic properties and are used in hard disk drives (HDD), motors and It has an irreplaceable position in high-tech products such as nuclear magnetic resonance; the performance of the permanent magnet material in the motor has a very important impact on the quality of the motor; [0003] However, due to the influence of the preparation process, the inhomogeneity of the properties of permanent magnet materials exists widely, especially the inhomogeneity of high-temperature magnetic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/16
CPCG01R33/16
Inventor 袁先念
Owner 芜湖衡西微量计量科技有限公司
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