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I guess it's about time to tell you what I am trying to do.
I have a number of toroids of different sizes. I want to put 20 turns on eash one and measyre the inductance produced. The problem, which I didn't think out very carefully, was that the only AC source I have produces, according to the VOM, a little more than 14 volts. But that doesn't really matter does it? I'm going to be measuring with an LC meter. I doubt it will blow anything up.
But, this has not been a waste of time. The numbers and guidelines you have provided are valuable. I never really considered it before, but I have had some test leads get pretty toasty. I think I need to make a set with larger conductors and start being more concious of circuit currents.
The magnet wire data is also important because I'm slowly trying to move into the RF world, and the ability to create my own inductors is probably going to be important.
Not to doubt anyone on this but, how can these ampacity numbers be correct? Look in a 5HP single phase electric motor, they draw ~22A but only have 20 gauge magnet wire for the field windings. I tried about a year ago to find this information but couldn't. None of the wire companies or motor companies will show it.
It lists the current capacity for AWG 30, at 80 degrees C, as 2 amps. Does that sound reasonable for magnet wire? It also doesn't say if that is Max or Typ.
Not to doubt anyone on this but, how can these ampacity numbers be correct? Look in a 5HP single phase electric motor, they draw ~22A but only have 20 gauge magnet wire for the field windings. I tried about a year ago to find this information but couldn't. None of the wire companies or motor companies will show it.
Things like this are why I don't trust any data I haven't collected myself, with the actual components that will be used. Almost everyone considers it a waste of effort when the testing has already been done. I'm not so sure.
Not to doubt anyone on this but, how can these ampacity numbers be correct? Look in a 5HP single phase electric motor, they draw ~22A but only have 20 gauge magnet wire for the field windings. I tried about a year ago to find this information but couldn't. None of the wire companies or motor companies will show it.
Depending on the Type of motor, Possibly Not all Armature windings are Active at one Time.
And Field Windings only take Part of the Current.
But you also need to Consider the Motor is Turning and Air is being forced through it to Help Cool it.
So Yes it is Possible.
Not to doubt anyone on this but, how can these ampacity numbers be correct? Look in a 5HP single phase electric motor, they draw ~22A but only have 20 gauge magnet wire for the field windings. I tried about a year ago to find this information but couldn't. None of the wire companies or motor companies will show it.
I expect that they use multiple strands of wire in parallel. A thinner wire is more flexible. It would be a lot easier to form many smaller wires into the little slots and spaces, than a single, larger gauge size.
Commens
1. Your core can vary with frequency. Put another way Cores have a max frequency
2. You can bifilar/trifilar/or even quadfilar wind. Means multiple wires at the same time.
3. hand winding, you can use a small stick like thing.
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