120V To 240V Conversion (Easy!)

In This Video:

I briefly explain the operation and usage of an auto transformer. I use its properties in an additive polarity configuration to boost my mains voltage to 240VAC! This is a really easy thing to do for the electronics hobbyist as microwave oven transformers are really common. The autotransformer used in the video is also rather compact for its apparent power.

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[surinamel]

The heater in question is the Patron model E9 and thanks for your indepth explanation

[jjlittlejohnnie]

I have been saying that all time . U have done a great job

[josepeixoto]

why does it sound like a bull horn?
if you cut the core, how does the inductance go around?

[kazuza]

Can this setup be used as a 220v to 110v output

[awesomedee]

I didn't understand why the N is not in the center terminal.

[seanweiss]

Hey I'm trying to make a 220v litchenberg wood burner. Is it ok to use the metal part of the transformer connected to the ground wires? Or is that not ok with this type of transformer. I don't want to blow anything up. Lol

[colerumpel]

You could just import an MOT from the UK and stack the 240v winding on your standard 120v MOT with the secondary removed. It can be done the other way around too if you live in a European country, just don't hook the 120v winding to mains or you'll have magic smoke plume out of your transformer core

[dillardhayes]

Will work for US products in Philippines?

[surinamel]

Hi DIY-OR-DIE I have a 120 volt outlet and looking to make a 240 volt transformer to run a 9KV 240 V heater. The heater draws 25 or 37.5 amps

[Hardtruth]

I have a machine that is 240 volts and 30 amps single phase. Would your set-up work with that machine?

[joelhiemstra]

Would further insulation/spacing between the two primaries be a good idea to minimize the chance of a shortage?

[minermike]

I really need to find one of these for SHTF use for a water well pump that is 240. I have a solar system with two deep cycle batteries. My family lives a few hours away but if SHTF then gas for generators will become scarce as well. They have water but won't have the means to bring it up without 240. I believe my inverter could handle a small amount of use to power this since most pumps that I see are down around 6 amps. Any constructive advice, as well as a source for this type of transformer would be greatly appreciated. I used to wire houses as well as electronics background so I understand the concept of this video.

[hermanman]

If for bassman 300 pro 120v covert to 240 v can?

[bigace]

Ok I’m stumped. I have a 230v single phase motor with only black, white, and ground. How do I achieve 230v single phase from 120/240? I can’t simply land each of the two 120 phases on the black and hire wires, correct?

[paulneilson]

I am making these and selling them on etsy.

[greatogbuagu]

I want to step up 100v to 220v 0r 230v and I bought 110v to 220v step up transformer. Now I'm getting 198v out of the transformer. Please what should I do to get the out put voltage increased to 220 or 230v?

[apurvsharma]

Hey, if i add a ballast in series with the primary coil and limit the input current, will it save my transformer from getting heat? i use my transformers to weld and they get extremely hot

[jafinch]

Was looking into utilizing on 120VAC generators where there isn't an option to use both coils for max current capabilities of the 120VAC design capabilities, and as another portable way using a step down transformer, making a higher current MOT step down transformer versus buying. Thinking for example a 13A breaker'd 3200W continuous portable generator with two 120VAC windings rated 1600W each in order to obtain ~25A/3200W total from one 120VAC outlet. The switched dedicated circuit on the generator design isn't an issue, though when reviewing I decided to research making a step down transformer from the 240VAC outlets 120VAC circuits. Any issues to consider if designing?

[jccaquias]

Can you obtain 120/240v split phase?
Like to run for exmple a 120/240 v mini split air conditioner like on a camper where you dont have 120/240 split phase

[crazyDIYguy]

But wait, you won't have true 220/240 because it's not alternating sine waves, both waves are still in phase. Therefore a regular 240v rated appliance or load here in the states wouldn't run off this I believe.
To get two 120v sine waves out of phase you could use an electric motor spinning another 240 motor with a magnetic rotor.
(Maybe similar to a rotary phase converter...)