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re-magnetising permanent magnet alternator

re-magnetising permanent magnet alternator

re-magnetising permanent magnet alternator

(OP)
I need to re-magnetise a small turbo-alternator(steam).

Unit output is 600W 32VAC. Machine is brushless, 2 pole permanent magnet with claw rotor. Rotor has been removed, and as such machine requires re-magnetising.

Presumably this can be achieved via electromagnet, but need to have some idea of flux densities required, orientation of electromagnet etc..

cheers

RE: re-magnetising permanent magnet alternator

Cheaper and easier to replace the whole thing!
Re-magnetizing requires expensive setup and equipment.
Good for many units.......expensive for single unit.
Recommend buying new alternator.

RE: re-magnetising permanent magnet alternator

I agree with labgeek.  Incidentally, it is only the old cast magnets such as Alnico that demagnetize when you disassemble without a keeper; ferrite and rare earth (samarium-cobalt or neodymium-iron-boron) do not require a keeper.  It is very difficult to demagnetize them except by taking them either to a very high temperature or subjecting them to very strong demagnetizing fields.  For the same reason, they require very strong fields to magnetize them.  

You may know that already, but I mention it just in case.

RE: re-magnetising permanent magnet alternator

Suggestion: Try to contact the manufacturer tech support.

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