Repost RE: Explain 3 Phase

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Tuite, Tom by way of Terry Fritz <twftesla-at-uswest-dot-net>" <TTuite-at-ALLEGROMICRO-dot-com>

Sorry, it looks like my cheasy graphics were made even worse somewhere along
the line.  Let me try and fix this.  In my post below the two signals should
appear as:




     |---|   |---|   |---|                         ----------------------
0    |   |   |   |   |   |
  ---|   |---|   |---|   |---                   0

                                        OR
  ---|   |---|   |---|   |---
0    |   |   |   |   |   |
     |---|   |---|   |---|                      0	


                                                   ----------------------





> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Tuesday, May 01, 2001 9:10 AM
> To: tesla-at-pupman-dot-com
> Subject: RE: Explain 3 Phase
> 
> 
> Original poster: "Tuite, Tom by way of Terry Fritz 
> <twftesla-at-uswest-dot-net>" <TTuite-at-ALLEGROMICRO-dot-com>
> 
> BE WARNED!!!! VERY CHEASY GRAPHICS/EXPLANATIONS BELOW!!!! :)
> 
> 
> Hmmmmm, mayhap we have a terminology conglict here.  I would 
> call either of
> the below 180 degrees out of phase (or inverted):
> 
> 
>      |---|   |---|   |---|
> ----------------------
> 0    |   |   |   |   |   |
>   ---|   |---|   |---|   |---				0
> 
> 							OR
>   ---|   |---|   |---|   |---
> 0    |   |   |   |   |   |
>      |---|   |---|   |---|				0	
> 
> 
> 	
> ----------------------
> 
> 
> 
> This comes from the following, for the sake of simplicity 
> lets look at the
> right most signals above.  Here we have one at a constant 
> positive value and
> the other at a constant negative value.
> Generally we would go to the imaginary plane to really look 
> at this stuff so
> lets do that:
> 
> 
> 				Imaginary axis
> 				.
> 				.
> 				.	
> 		  .................... Real axis			
> 				.	
> 				.
> 				.
> 
> Now if we plot the signals we get;
> 
> 
> The top signal yields this:
> 
> 				Imaginary axis
> 				.
> 				.
> 				.	
> 		.............----------....  Real axis			
> 				.	
> 				.
> 				.
>  
> Where the magnitude is some purely real positive value.
> 
> The botom signal yields this:
> 
> 				Imaginary axis
> 				.
> 				.
> 				.	
> 		...---------........  Real axis			
> 				.	
> 				.
> 				.
> Where the magnitude is some purely real negative value.
> 
> NOW, the angle between these two vectors is 180 degrees.  So 
> we say they are
> out of phase by 180 degrees.  Hehe now I thik I have confused 
> myself, but
> for better or worse thats what I think of when I hear 180 
> degrees out of
> phase, or am I completely crazy? :)
> 
> Tom T.