PM Alternator Phase Losses
PM Alternator Phase Losses
(OP)
If I have 10 sets of 3-phase windings on a stator where each of their neutrals are isolated from each other ("Y" types), If I begin to connect each set to a 3-phase rectifier one by one, why would I have to keep raising the RPM of the machine to maintain the "expected" current out? For example if I connect one set to the (loaded) rectifier I measure 10ADC on the rectified output at 3000 RPM, but then if I connect two more sets I would expect 30 ADC at the the same RPM, however in order to provide the 30 AMPS, I need to increase the RPM up to 3300 RPM. Where are these losses coming from?





RE: PM Alternator Phase Losses
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: PM Alternator Phase Losses
RE: PM Alternator Phase Losses
A common mistake, before we learned this, was to disconnect the measuring circuit and that always led to speed change in the driven paper machine section - which caused a costly web break.
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: PM Alternator Phase Losses
With PM fields I guess your best option is to increase the speed.
Bill
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"Why not the best?"
Jimmy Carter
RE: PM Alternator Phase Losses
RE: PM Alternator Phase Losses
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: PM Alternator Phase Losses