On Mon, 30 Jul 2018 15:04:45 -0700 (PDT), trader_4
wrote:

On Monday, July 30, 2018 at 5:13:07 PM UTC-4, wrote:
On Mon, 30 Jul 2018 13:30:23 -0700 (PDT), trader_4
wrote:

On Monday, July 30, 2018 at 2:37:58 PM UTC-4, wrote:

One more time S L O W L Y

I have a transformer with two 120v secondaries. Assume the taps are A
& B on each.
If they are wound around the core in the same direction from A to B,
do you agree each would be in phase if they are measured A to B.
Now if I connect them in series A to B do you agree the current is
going in the same direction in both windings so they are still in
phase? You will see 240v from the A to B on each end.
If they were connected A to A in series they would be 180 degrees out
of phase the voltage would be zero.
In fact they have to be in phase to add. Otherwise they buck.

Now look at your pole pig outside your house and tell me which one it
most closely resembles.

You are confusing the halves of one sine wave with two sine waves.
I don't know what the professor has to rationalize to teach this
simple thing to the snowflakes in his class.

Go ahead, keep disparaging the professor of electrical engineering
with 40 years of experience, who presented the paper I cited at
a power industry conference to his peers. I'm sure they are all
dumb snowflakes. Did you look at the math, where he did the analysis?
This coming from the guy who still can't give a definition of what
N phase power even means. I gave you two or three days, then I gave
you the simple definition that cover it all. One that doesn't rely
on transformers, generators, it's a complete, general definition.


I am just disparaging his rationalization of a simple thing. The
transformer in front of your house is essentially 2 windings IN PHASE
that are connected together in series. The fact that they center tap
it and ground the center tap might give the impression that one
suddenly changed directions but it is simply not true.
Lets even make this simpler for you.
I have the exact same transformer and I move the ground to one end,
like you see in Europe. It is a single winding with one end 2xx volts
above ground. You will agree this is clearly single phase?
Now how does moving the grounds back to the center change the number
of phases present or change the current flow in the second half of the
transformer at all?
Making this 2 generators does not change a thing. If the 2 generators
are in phase, hooking them in series doubles the voltage end to end
but each one is still working exactly the same way. Grounding the
junctions between them may look like something changed measured from
the middle but nothing changed.
It is my ramp again. If you are at the top, it is a ramp down. If you
are at the bottom it is a ramp up but if you are in the middle it
looks like 2 ramps, one up and one down. It is still just one ramp.