Re: What is a 'demagnetization coil' ?



Sven Wilhelmsson wrote:

In the context of fly-back converters, what is a 'demagnetization coil'?

I would think of it as a coil used to actively demagnetize the core.
Sometime it seem to denote a coil that is passively de-energizing the
core during the demagnetization phase in order to e.g. protect the
driving transistor.

So, what exactly is the purpose of a 'demagnetization coil' ?

To remove remanent magnetism that might otherwise result in core saturation.

Graham

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