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alternator residual magnetism lose

6065 Views 5 Replies 4 Participants Last post by  triden

What are the reasons that cause a self excited generator to lose it's residual magnetism ??


wouldn't it be better to manufacture the alternators with a small permanent magnets on the armature to avoid the excitation loss problem ?
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Idle time
What exactly happens to the magnetism in this case ? there has to be some sort of effect that is causing the loss when the alternator is not moving.

What about turning the generator off while on load, i have heard of excitation lose after such cases but never experienced one personally ?
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