[AT] Generator--doing funny things

Fri Jun 16 17:30:24 PDT 2006

Will,  I guess I'm stupid to be arguing with an EE but I thought the RPM of 
electric generators was to control the frequency.  Most stuff runs at 60 HZ. 
3600 rpm / 60 sec/min corresponds to 60 Hz in the case of a 2 pole 
generator.  Other wise our old style clocks wouldn't be right and our TV 
pictures would  look funny.   Am I wrong about that?

Charlie

----- Original Message ----- 
From: <Bustedtractor at aol.com>
To: <at at lists.antique-tractor.com>
Sent: Friday, June 16, 2006 6:19 PM
Subject: Re: [AT] Generator--doing funny things

> The RPMs for a generator will usually be either 3600 or 1800. A 2-pole
> generator operates at 3600 RPMs, while a 4-pole generator will run at 1800 
> RPMs.
> There is the possibility of a 6-pole unit in which case the RPMs would be
> 1200. These RPM numbers are governed by the laws of physics and also 
> represent
> the nominal speeds that a electric motors will run at. The actual 
> operating
> speeds for motors are slightly less due to slip. Electric motors 
> typically run
> at 3450, 1725, and 1150 RPMs based on their design and  construction.
>
> I just retired from electrical engineering 2 weeks ago and now I have  a
> number of tractors that are begging for my full-time attention.
>
> Will in MN
>
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> <DIV>The RPMs for a generator will usually be either 3600 or 1800. A 
> 2-=
> pole=20
> generator operates at 3600 RPMs, while a 4-pole generator will run at 
> 1=
> 800=20
> RPMs. There is the possibility of a 6-pole unit in which case the RPMs 
> would=
> be=20
> 1200. These RPM numbers are governed by the laws of physics and 
> also=20
> represent the nominal speeds that a electric motors will run at. The 
> actual=20
> operating speeds for motors are slightly less due to slip. Electric 
> motors=20
> typically run at 3450, 1725, and 1150 RPMs based on their design and=20
> construction.</DIV>
> <DIV> </DIV>
> <DIV>I just retired from electrical engineering 2 weeks ago and now I 
> h=
> ave=20
> a number of tractors that are begging for my full-time attention.</DIV>
> <DIV> </DIV>
> <DIV>Will in MN</DIV></FONT></BODY></HTML>
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> Remembering Our Friend Cecil Monson 11-4-2005
> http://www.antique-tractor.com/mailman/listinfo/at
>
>
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