Re: What is a 'demagnetization coil' ?

On 5 Jun, 17:45, Sven Wilhelmsson <sven.wilhelms...@xxxxxxxxx> 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' ?

--
Sven Wilhelmsson http://home.swipnet.se/swi

A classic example is the degausing coils in a TV to to demagnetize the
screen.
If a magnetic area builds up it can distort the electron gun beams.

Its usually on for a second at power up and is in series with a
thermistor to turn it off.


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