Hello to All,

Ok, and here is a very similar image, HOWEVER, here the Commutation takes place in OPPOSITE SEQUENCES related to Both Modules.

This Means that Module 1 is following the same prior sequence, or from 1 to 8 at 180º.

But, Module 2 terminals to Commutator are opposite, or Module 2 Contact #1 is now connected to terminal #8 of Commutator, while Module 2, Contact #8 connects to terminal #1 of Commutator.

Then Module 2 would be moving Field from 8 to 1, while Module 1 Field would be displacing from 1 to 8 at the same timing.

Other words, these connections generate OPPOSITE "Pumping" for both Modules, as is represented on below image using the magenta Circle-Arrow for each.



This changes basically alters the 240VAC Output into a Two-Phase outlet, and considering A & B, as L1 & L2 respectively.

HOWEVER, this specific Diagram is showing a 16-contact commutator, which delivers each phase every 180º and NOT every 90º, like it should.

Eventually, my next Commutator would be of 32 elements, and there would be Four (4) "tempos" or Four Cycles of Eight Contacts each, every 90º, which will also reduce the frequency-speed to half than we are with 16 elements.

Basically, this Diagram is to show how easy we could change from a Sync (Single Phase) running generator Assembly, to an Off Phase (2 Phase) type, by just switching the connection terminals between Commutator to Generator's Modules.

Regards

Ufopolitics

Hi Ufo,

I have been studying your two methods for getting a 2 phase signal.  Your method one is NOT going to give you 220 volts.  Because both modules are in phase the 120 signals will also be in phase and there will be 0 volts between them.

Your second method with the 2 modules 180 degrees out of phase will give you 220 between the two 120 volt phases.  However you don't  need the t connection between the 2 120 volt phases and the 220 volt power.  220 volt doesn't use a neutral.  You only need the neutral if you want to use one side of the 220 volt power to give you 110 volt power.  But you are already doing that with the two 120 volt phases.

Respectfully,
Carroll

Quote from: citfta on Mar 07, 2024, 11:25 AMHi Ufo,

I have been studying your two methods for getting a 2 phase signal.  Your method one is NOT going to give you 220 volts.  Because both modules are in phase the 120 signals will also be in phase and there will be 0 volts between them.

Your second method with the 2 modules 180 degrees out of phase will give you 220 between the two 120 volt phases.  However you don't  need the t connection between the 2 120 volt phases and the 220 volt power.  220 volt doesn't use a neutral.  You only need the neutral if you want to use one side of the 220 volt power to give you 110 volt power.  But you are already doing that with the two 120 volt phases.

Respectfully,
Carroll

Thanks Citfta,

Yeah, I knew there would be something wrong about the first method due to both modules being in phase...and the 240 VAC.

It is great to have you here Carroll!!

Now, according to what I have read, there are "two types" of 220-240 VAC, one for home use, which is single phase, with just two wires...as there are the 2 phase type, more commercial, for buildings, etc...now, I understand they do have three wires, A,B and Neutral...

Once I connected a two phase 220 VAC work bench...and I will look for those diagrams on the way they connect...as I also remember that by just swapping the two A,B wires it changed the main induction motor direction...

Anyways, the main purpose of these two posts is to show we can connect the terminals between commutator and generator to move fields in sync or opposed, and have two different results...and now, thanks to you, we can define which one is better.

Thanks

Regards

Ufopolitics

Hi again,

Yes house wiring uses single phase 220 with a L1, L2 and a neutral.  Between L1 and L2 just like in your drawing we get 240 volts.  Between either L1 or L2 and the neutral we get 120 volts.  Your method 2 should work very well as a home generator as most water heaters and electric ranges use 240 volts.

In commercial buildings they use 3 phase AC with L1, L2, L3 and neutral.  Here we get 208 volts from any phase to any other phase because the phases are actually 120 degrees apart. And we still get 120 from any phase to the neutral.  But most industrial and commercial motors run on 3 phase using all 3 phases and no neutral.  And as you have correctly recalled you can swap the leads going to any two phases and reverse the motor direction.  3 phase motors are much more efficient than single phase motors and easily reversed.

Take care,
Carroll

Quote from: Ufopolitics on Mar 07, 2024, 12:03 PMOnce I connected a two phase 220 VAC work bench...and I will look for those diagrams on the way they connect...as I also remember that by just swapping the two A,B wires it changed the main induction motor direction...

Ufopolitics

Hello again,

Ok, I found the above installation I was mentioning...and it was about a Three Phase (NOT about a two phase, like I mentioned before above) 220 VAC...the image that I did for the Manual I wrote (in Spanish) is below:


Anyways, is a completely different setup...we are not there yet...

Regards

Ufopolitics