Electronics > Projects, Designs, and Technical Stuff
Help - Convert Personal Blender from 230v to 110v
helius:
--- Quote from: tooki on May 28, 2020, 06:40:20 pm ---Correction, 120V+120V split-phase. It’s just a single 240V phase with a center tap.
--- End quote ---
Exactly right. Two-phase power has not been common for the last century (wasn't it the system favored by Tesla?)
NiHaoMike:
There's also the "2/3" 120/208V system that's common in apartments and condos in the city, but not individual houses. It's more or less the 120/208 3 phase system wired such that every housing unit gets 2 of the 3 phases.
maxwell3e10:
A long time ago, when I was a teenager and moved to US, I converted some 220V appliances by unwinding some turns from the motors. You need roughly 3/4 of the turns to make the inductance go down.
tooki:
--- Quote from: blueskull on May 29, 2020, 02:17:24 am ---
--- Quote from: tooki on May 28, 2020, 06:40:20 pm ---Correction, 120V+120V split-phase. It’s just a single 240V phase with a center tap.
--- End quote ---
I did mean 120V+120V separated by 180 degrees. Otherwise I would have said 2 out of 3 phases.
--- End quote ---
And that’s still wrong: in the US split-phase system, the two 120V halves are in phase.
helius:
--- Quote from: tooki on May 29, 2020, 08:57:51 pm ---And that’s still wrong: in the US split-phase system, the two 120V halves are in phase.
--- End quote ---
It depends on how you measure. In terms of RMS or power supplied, they are in phase, but when graphed on the same axis they appear to be shifted by π radians. But historically "two-phase" meant a shift of π/2, and this is not that.
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