Re: 3 phase car alternators

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Chris Rutherford" <chrismrutherford@xxxxxxxxxxxxxx>

I have a box of alternators I was using to attempt a flywheel energy 
storage device.  The output voltage and therefore current is 
proportional to the rotation speed and the DC activation current.  At 
low RPM with a high flux density caused by the high activation 
current you might get a decent output voltage/current.

Chris

On 10/17/06, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: "Jim Mora" <<mailto:jmora@xxxxxxxxxxx>jmora@xxxxxxxxxxx>

Hi Steve,
I have not been following this thread but an inverter jumps to mind. How to
vary the freq though?
Jim Mora

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Monday, October 16, 2006 10:15 PM
To: <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx
Subject: 3 phase car alternators

Original poster: "S&JY" 
<<mailto:youngsters@xxxxxxxxxxxxxxx>youngsters@xxxxxxxxxxxxxxx>

I messed with an alternator many years ago with the idea of using it to
output AC by removing the internal diodes.  As I remember, there are a lot
of poles in an alternator, so at typical RPMs as used in cars, the AC
frequency is many hundreds of Hz.  Such an alternator turning at a slow
enough RPM to output 50 or 60 Hz would have too low a power output to be
very useful.

--Steve

----- Original Message -----
From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx >
To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
Sent: Monday, October 16, 2006 9:21 AM
Subject: RE: Egg Circuit Revisited - A Solid State Driver


  > Original poster: < <mailto:davep@xxxxxxxx>davep@xxxxxxxx>
  >
  > I think Terry's thought of an auot alternator an
  > intiguing one.  Such like are ruggeder than solid state,
  > typically, capable of more than the usual 12v, with care,
  > could be run 'two phase' (alebeit at 120, if
  > desired.  Approriate choie of drive motor would
  > allow frequency variation at will.
  >
  > Good Luck...
  >   best
  >   dwp
  >
  >
  >
  >
  >