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
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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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