# Repost RE: Explain 3 Phase

```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.

```