How many turns of wire takes to make a 120v magnetic coil?

Question

size it is not an issue just final resistance in ohms.....how many turns of wire or how many ohms of resistance ?

thanks for any feed back.

Answer 1

Well, it first depends on what size wire you're using. For an electromagnet, I'm assuming you're using magnet wire. You'd probably want 24 or 26 gauge magnet wire. I've heard that for a large homemade electromagnet (like a repulsion coil), you don't want a current flow of any more than 10 amps.

So, with 120 volts you would need an impedance of at least 12 Ohms. (120 volts divided by 12 Ohms = 10 Amps). But keep in mind that with alternating current, most of the coil's resistance would be from inductive reactance. Whenever you pass alternating current through a coil of wire, it generates an alternating magnetic field that opposes some of the current. Transformers and motors are designed with reactance in mind, and that's why they may have a winding with thick wire and only a few turns.

The formula for calculating inductive reactance is 2(3.14)(Frequency)(Inductance). You already know the frequency...60hz. But you'd have to know the inductance. You could calculate that with the size of the coil, or you can also measure it with an inductance meter.

I would say you would want at least 200 turns. For safety, while you're experimenting, put a load in series with the coil to limit the current. A light bulb will work. That way, even if you don't have enough turns on the coil or if it is shorted out, the light bulb will limit the current and prevent an overload. Heck, with something to limit the current, you could wind the coil however you want.

Answer 2

If you are talking a 120VAC coil then the impedance caused by the coil's inductance is the main consideration. That depends on the AC frequency it will be used on.

If you want a very powerful pull from that coil you would put a lower impedance coil to pass more current but not keep the current on for a long time to avoid it overheating. That would change the number of turns also.

Answer 3

How many turns with 12 gauge would it take to provide 120 volts at 50 amps

Answer 4

how many turns of wire to make a 5000 volt magnetic coil

Answer 5

how many coils and what size and turns to get 120 volts 100 amps

Answer 6

Size is a big issue as you need to know the wiresize and over all watts you want to put into this sucker.

Answer 7

section is the pass component to the twine in sq. metres, so divide the sq. millimetres via a million million. n is the style of conductors slicing the windings, so for each turn (loop) it is two conductors. velocity is metres in keeping with 2d, so which you will ought to calculate that on rpm and diameter of the circle. B is the flux capability of the magnets, you will ought to look that one up.