Method and device for detecting full magnetization of electro-permanent magnets
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United States of America Patent
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Oct 14, 1997
Grant Date -
N/A
app pub date -
Nov 30, 1995
filing date -
Nov 30, 1994
priority date (Note) -
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Abstract
A method and device for detecting full magnetization of an electro-permanent magnet which includes at least one permanent magnet part and at least one coil. Current is passed through the coil over a certain period of time in order to magnetize the electro-permanent magnet. The current through the coil of the magnet is measured during magnetization, and an increase of the derivative of the current curve is detected. A signal is given to an operator or computer if an increase in the current derivative is detected, which indicates full magnetization of the electro-permanent magnet.
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