- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
So are you claiming every expression creates a new phase?
Why is residential wiring known as single phase?
- Thread starter TimWA
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No.
The expressions don't create a phase.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Thanks,
Then the six expressions may be derived from three sets of phases; each set having an identical phase; i.e., it's still a glorified three-phase system.
They are not identical.
Six different phase displacements are not identical.
The six output pulses are at 60deg intervals. They are not identical.
The six firing pulses required are at 60 deg intervals. They are not identical.
Rick Christopherson
Senior Member
Right. And does he have beady red eyes, whiskers, and a long tail? You might want to hang out in bigger circles.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Only if you are asseting:
-Vmsin(ωt), -Vmsin(ωt+π/3) and = -Vmsin(ωt+2π/3)
aren't equivalent inverses that share the same phase as other functions
Six different phase constants, six different phases. I don't see that it matters how they are generated, they are there.
I'm asserting that I need one firing pulse every 60deg for the hexaphase rectifier.
Do you dispute that?
David Hinton P.E.
Member
- Location
- Kansas City
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Yes-So? Unless you're trying to reintroduce "in phase" as an alternate to phase, it's irrelevant - and it?s still a glorified three-phase system.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Been there, done that, skipped the T-shirt.
Are you seriously disputing that I need one firing pulse every 60 degrees for a hexaphase rectifier?
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
No - I'm saying it's a glorified three-phase system - what happens down stream is irrelavent.
So let's ignore this little inconvenience of how the secondary hexaphase circuit works because it is irrelevant?
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Works for me. How you use your "hexiphase" downstream connections is just as irrelevant as 1004 was to single-phase systems.
Three line to neutral, three neutral to line.
All you've done is apply (definition 2) to a three-phase (definition 1) system. All Rbalex is really saying is a three-phase (definition 1) system can express all (definition 2) equations in equivalents that reduce to three basic equations.
- Vmsin(ωt) = -Vmsin(ωt+π)
- Vmsin(ωt+π/3) = -Vmsin(ωt+4π/3)
- Vmsin(ωt+2π/3) = -Vmsin(ωt+5π/3)
For the purpose of naming the system, it's a (definition 1) three-phase system. For the purpose of using the system, it's however many useful (definition 2) voltages you can tap, six in the case you presented. Add additional taps to the coils and you get even more (definition 2) phases but still have only three (definition 1) phases.
Smart answers are limited to smart questions. Rbalex isn't dumping the phase constant. Under (definition 1) it cancels out. You use (definition 2) where it can't be canceled.
Actually, perfectly relevant.
Nonsense! The phase constant CANNOT be cancelled or altered in any way because that is what determines the starting point!
rbalex himself first posted that,
phase = (wt + phi0)
That is what makes V2n an inverse of V1n when the phase constants differ by PI.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
I thought the reason you brought up your "hexiphase" system was because you wanted to know how my position applied to it. I really don't want to start over with single-phase systems again. As relevant to conventional 120/240V systems, phase stops at the transformer; how you monkey with it downstream is irrelavent.
Edit add: Maybe I should say " As relevant to this discussion, phase stops at the transformer; how you monkey with it downstream is irrelavent."
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