Think there is very low demand for this, nobody, except the manufacturers go to design and build such big transformers and test and get certified them.
Why not buy one that fits?
So I am researching the cost of build an inverter. The cost of bare bones inverter boards, on eBay, capable of several kW of power are ridiculously cheap (<$100). The trick is purchasing/winding a transformer that will take an approximate 16VAC @ 60Hz output and transforming it into 120VAC.
I am willing to wind my own, but I can not find a source for large toroid cores or even silicon steel E-I cores. Anyone ?
Are custom wound transformer (maybe 2-3 kVA) with in the price range of a DIYer.
The 16VAC come from a peak-to-peak voltage of about 20V. (RMS voltage = PP voltage / √ ̅2)
The 16VAC come from a peak-to-peak voltage of about 20V. (RMS voltage = PP voltage / √ ̅2)
Cough You may want to look that over once more Cough
First, I HAVE been around the block a time or 2 and I do know that transformers work in both directions. (The "old" in my name isn't there for no reasons !)
I'd try one more time.
The RMS is √ ̅2 of the peak, not the peak-peak, so 7.071 would be close enough for field work
I'd try one more time.
The RMS is √ ̅2 of the peak, not the peak-peak, so 7.071 would be close enough for field work
Well, good luck transforming an offset sinewave.
I'd try one more time.
The RMS is √ ̅2 of the peak, not the peak-peak, so 7.071 would be close enough for field workI don't like to dispute anyone on line, ESPECIALLY when I can not find 100% proof, but ..
"The RMS is √ ̅2 of the peak, not the peak-peak ..." Yes, that is the "classic definition, BUT it assumes that GROUND is in the center of the sine wave. In this case, ground is at the bottom of the wave.
That's not what the OP is suggesting. He's got a waveform where the hot to the cold goes up to positive 20 volts and then down to zero volts. The average is a 10 volt offset. Put that through a transformer and you'll generate a shedload of heat and not much else - until the smoke gets out.
That's not what the OP is suggesting. He's got a waveform where the hot to the cold goes up to positive 20 volts and then down to zero volts. The average is a 10 volt offset. Put that through a transformer and you'll generate a shedload of heat and not much else - until the smoke gets out.I think you need to do your home work ! This is not somewhat off design. It is a well proven design that has been around for MANY years, used heavily in the RV/Marine/trucking industry.
What is new is, how inexpensive the implementation has gotten to be. Ebay - 3kW inverter board -$80
Basically, add a housing, cooling and an output transformer and you are there. The whole design revolves around the EG Micro EGS8010 chip Datasheets