Method and apparatus for measuring magnetic properties of magnet

Details Method and apparatus for measuring magnetic properties of magnet Method and apparatus for measuring magnetic properties of magnet

1985-03-29

1986-11-18

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Hysteresis loop curve display or recording

324211, 324239, G01R 3314, G01N 2772

Patent

active

046238417

ABSTRACT:
A piece of the magnetic material to be tested is coupled to the device by primary and secondary windings. The material is then exposed to varying polarities of a controlled electrical current, such as a ramped current, through the primary winding causing the magnetic flux of the material to vary with respect to the controlled current; and creating varying voltage levels across the secondary winding. When this process has been completed the data is made available to a computer which now has data for the current levels transmitted through the primary winding and the corresponding voltage levels across the secondary winding. The computer can then utilize this data to provide a variety of magnetic property values of the magnetic material.

REFERENCES:
patent: 3214609 (1965-10-01), Drew et al.
patent: 4207520 (1980-06-01), Flora et al.
patent: 4296376 (1981-10-01), Bartol
patent: 4314200 (1982-02-01), Marek
IEEE Standards on Electronic Computers: Methods of Testing Bobbin Cores, 1962, pp. 20-24.
DeMott, Elmer G., Integrating Fluxmeter with Digital Readout, IEEE Transactions on Magnetics, vol. MAG-6, No. 2, Jun. 1970, pp. 269-271.
Capptuller, Horst, Numeric and Graphic Recording of Magnetization Curves by Means of Analog-Digital Techniques, IEEE Trans. on Magnetics, vol. MAG-6, No. 2, Jun. 1970, pp. 263-265.
Plassard, J., Hysteresisgraph with Discontinuous Sweep Mode, Journal of Magnetism and Magnetic Materials 19 No. 1-3, Apr. 11, 1980, pp. 260-262.

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