Finally matched the load

141

01:28:10

Having a hard time keeping transformer output at 120V and lighting the loads up properly.

V and I are slightly out of phase at the source.
Transformer V and I are also slightly out of phase. I has lots of harmonics though. 

published 11 years ago

Pusan

11 years ago

Best ever.......i have seen

rich11292000

11 years ago

Not real. start with sources, grounding, transformer grounding. After that you can put any kind of crap on the secondary and call it real, as long as the utilities main is built right.

rich11292000

11 years ago

It's very close to acting right if not the way it's supposed to, just standards make the difference. Side note 120volts is rms while the simulators scope and actual wall voltage is 170 volts peak, ignore this note if it confuses you.

vrnambur

11 years ago

Thanks. I didnt realise that 120V is the rms value. I did try to ground the sources on one side but found that phase shifting the sources for 3 phase causes a DC shift of the transformer output. Thinking from the point of a generator, I thought each phase simply hands out 2 terminals with a AC voltage difference. Not sure if my assumption is correct and whether the transformer behaviour is supposed to be like that or an issue with the simulator? If both my methods of grounding are wrong, then I am not sure what you are talking about.

rich11292000

11 years ago

I think you have to trick the simulator to get delta to work on here. This is actually the 2nd build I've seen to get a true delta to work properly, the other is mine. We are using capacitors to simulate grounding to earth, this ground isn't for electron flow, more for a zero reference point. You see what happens with out this reference, the phases keep pushing each other out of whack.

rich11292000

11 years ago

Check my delta transformer out, it uses a center tap for grounding to earth. As long as it's earthed the center tap has no voltage and no amperage to ground. However from comments from other users and wiki stuff suggest that only the U.S.A. uses center tap transformers and is unfavorable in other countries. When we don't have a center tap for grounding to earth, we ground a phase to earth. Not really sure how that works.

vrnambur

11 years ago

BTW, does anyone have an idea as to why this is acting as some sort of current source? It seems to want to push 400 A through no matter what load and number of loads i attach. Try out the switch i put at the loads to see what i mean.

vrnambur

11 years ago

I had a look at your circuits rich. Liked the one with only 2 Sources into a 3 phase rectifier.

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