Generator Electrical Engineering Question

[Jimbrown]

"Not arguing, just interested in this last sentence, I know that the small Honda gensets such as the 2000 and 3000 inverter units tie the outputs together when you chain them together. Always thought that odd is this the same principle?"

The small hondas are DC generators driving an inverter. Totally different.

 

[E/S]

Please let us know what the Tech. says, I would really like to know what the phase is supposed to be.

E/S

 

[dangier_VA]

E/S-Will post after I make contact with a tech. Dropped the end bells off this morning to have new steel sleeves put in. Machine shop owner said "no problem in matching to the bearings".
David

 

[dangier_VA]

Took some time tonight and added pictures of both units brush end showing the armature locations. Second picture shows the sealed voltage regulator.

 

[hr3]

dangier_VA.. When you get the gear back together and try it take readings from the individual units .. It almost sounds like one unit is trying to pick up the whole load.. I'll give Generac a call next week and see if they have any information on this unit,,

 

[Redneck in training]

The heads are in series therefore they should be in phase (zero deg) to produce maximum voltage. 180 deg appart will produce zero voltage.

 

[mbohuntr]

I ran your set-up on a simulator. (Electrical circuit simulater program) If you are wired in series, the polarities are reversed, and the phases are 180 degrees off, you will indeed get 240 volts. Here's the interesting part, if your phases are off by 10 degrees, you should only see a few volts drop at a 5K resistive load. I'm not sure if the circuit will post, but at 10 degrees, or 170 degrees out of phase, you still get 239 volts.

 

[dangier_VA]

Attached is a crude diagram of my unit. I had said it was in parallel since each coil furnishes a leg to the breaker. Looking at the diagram it could run each way.

Still trying to wrap my head around the following statement:
"The heads are in series therefore they should be in phase (zero deg) to produce maximum voltage. 180 deg appart will produce zero voltage."

From my simple understanding, heads in 0 degrees would produce a single sine wave but double amperage, and heads at 180 degrees would produce a double sine wave and half of the amperage. Does this make sense. Which is better?

 

[mbohuntr]

I am not a good source beyond theory, but it looks like a split phase transformer setup which in my limited expierence fits your set-up. Each phase is 115, and puts out 230 when added together. I think your good with the set up, the regulaters may not keep your voltage tight because of their age, or configuration. Probably not a good source for sensitive electronics. Get a tech's opinion first...

 

[mbohuntr]

I did a simulation to illustrate the meaning if 180 degrees phase difference.The voltages at any moment in time cancel each other out unless one's polarity is reversed. Each phase is a different color. I then did one at 20 degrees out of phase to show both phases closer in sync. If you are 180 degrees out, and reverse one phase's polarity, you will only see one line on the scope. The phases are added, tthey add the peak voltages at a moment in time. View attachment 172983

View attachment 172984