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Name:  mleyba
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: 1999

How can I recharge a dead magnet? Thanks! :-}

Some magnets are not rechargeable, and some are only marginally so. Generally, however, it is necessary to subject the material to a very high intensity electro-magnetic field for a short period of time repeatedly. There are machines that are built specifically for that purpose. Many Permanent Magnet DC Motor repair facilities have these devices. They are used to "recharge" the field of these motors. Many of these motors used to use AlNiCo magnets which would recharge very well using charges of, say, 1,000,000 watt-seconds for approx. 10 ms. This charge would have to be repeated several times, depending upon the gap between the field and the magnet material, the amount of the material, and the amount of original magnatism lost. Ceramic magnets are not as nearly successful. Sumariam Cobalt magnets as well as NdFeB (Neo-Iron) magnets recharge the best.

-- dipper

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