A transformer can make any voltage you design it for.
A transformer is two coils of wire wrapped around a common iron core. The primary coil is what connects to the wall outlet. The secondary is what we connect to for our circuits. Transformers work by "turns ratios." If my primary side has 100 turns - 100 loops in the winding coil - and my secondary coil has 200 turns, then the voltage will be stepped up to twice the primary voltage. So 120v in and 240v out. If my primary was 100 turns and the secondary 50 turns, then it steps down to half, or 120v in and 60v out. By changing the turns ratio, my 120v in primary can make any voltage I want in the secondary.
If I have a ten to one ratio, my 120v in makes 12v out. If I connect that same transformer to 240v instead of 120v, then I'd get 24v instead of 12v. It is all about the turns ratio. And yes, if I hook it up backwards and I put my 120v into the secondary coil, I'd wind up with 1200v on the primary coil.
SO I can make a transformer to any voltages I want. By wrapping additional coils around the iron core, I can have additional voltages. So for example with my 120v primary (or 240v, whichever we are designing for) I can have one winding producing 350vAC, and a second making 6v for heaters. So one steps up and one steps down on the same transformer.
A transformer is two coils of wire wrapped around a common iron core. The primary coil is what connects to the wall outlet. The secondary is what we connect to for our circuits. Transformers work by "turns ratios." If my primary side has 100 turns - 100 loops in the winding coil - and my secondary coil has 200 turns, then the voltage will be stepped up to twice the primary voltage. So 120v in and 240v out. If my primary was 100 turns and the secondary 50 turns, then it steps down to half, or 120v in and 60v out. By changing the turns ratio, my 120v in primary can make any voltage I want in the secondary.
If I have a ten to one ratio, my 120v in makes 12v out. If I connect that same transformer to 240v instead of 120v, then I'd get 24v instead of 12v. It is all about the turns ratio. And yes, if I hook it up backwards and I put my 120v into the secondary coil, I'd wind up with 1200v on the primary coil.
SO I can make a transformer to any voltages I want. By wrapping additional coils around the iron core, I can have additional voltages. So for example with my 120v primary (or 240v, whichever we are designing for) I can have one winding producing 350vAC, and a second making 6v for heaters. So one steps up and one steps down on the same transformer.
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