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Anonymous Poster

Excitation current

03/08/2009 8:43 PM

Why is DC used to excite a generator field?
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lyn
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#1

Re: Excitation current

03/08/2009 9:52 PM

Because AC won't.

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Sapper
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#2
In reply to #1

Re: Excitation current

03/08/2009 10:07 PM

I was going to say..."Because it feels Better!"

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Sapper.

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sb
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#4
In reply to #2

Re: Excitation current

03/08/2009 10:13 PM

or you want poles apart.

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Sapper
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#3

Re: Excitation current

03/08/2009 10:13 PM

A Generator works by passing a Conductor through a stable Magnetic Field.

A magnetinc field produced by AC will fluctuate and\or the poles reverse depending on the frequency.

A DC field on the other hand is stable, doesn't fluctuate or vibrate and always has the poles in the same place.

As such DC is always preferable to power the magnetic coils used to provide the excitation of the generator.

Regards,
Sapper

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