Brushless excitation
Brushless excitation
(OP)
Even new synchronous machines, specially Rotary Compensators, still use brushes/rings for field winding excitation current instead of brushless system. Probably the possibility of field polarity reversion is the reason.
When/why is this reversion necessary? Thanks.
When/why is this reversion necessary? Thanks.





RE: Brushless excitation
Bill
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"Why not the best?"
Jimmy Carter
RE: Brushless excitation
RE: Brushless excitation
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Brushless excitation
RE: Brushless excitation
RE: Brushless excitation
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: Brushless excitation
EDMS Australia
RE: Brushless excitation
A regenerating generator rotor looks a lot like a current source, so Skogs is right - a fully-controlled bridge will meet the requirement for two quadrant operation. Four quadrant would actually reverse the field polarity, which doesn't happen in practice.