Re: Regen, part 3

[Thomas Shay <tshay@IX.NETCOM.COM>]

> Art Mander and Rich Rudman wrote:
>
> >      By the way Rich, you mentioned that a three-phase single-pole 400 Hz
> >      generator would be 8000 rpm.  I think you meant three-pole.  A single
> >      pole machine would be 24,000 rpm, two pole 12,000 rpm.
> >
> >
> Single pole magnetics... with 3 windings is 8000 RPM at 400 Hz. These
> puppies come strapped for Delta 3 phase at 208 volts.

Ouch, I can't read discussions about three pole and single pole ACgenerators and
keep quiet.  There ain't no such things.  Generators
will have two poles or some multiple of two poles because an AC
generator must have alternating north and south poles to generate
alternating current.  With two poles the frequency and rotational
speed are the same; 400 revs per second (24000 per minute) will
produce 400 cycles per second or 400 Hertz.  With more than two
poles more than one cycle per revolution will be generated. Thus:

2 poles   400 Hz at 24000 rpm     60 Hz at 3600 rpm
4 poles   400 Hz at 12000 rpm     60 Hz at 1800 rpm
6 poles   400 Hz at   8000 rpm     60 Hz at 1200 rpm
8 poles   400 Hz at   6000 rpm     60 Hz at   900 rpm
etc., etc.

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Re: Regen, part 3