E
ER
- Jan 1, 1970
- 0
I would like to build an electromagnet that is powered directly from
household AC current (110V/60Hz), and I would like to know about any
precautions and design parameters I should keep in mind. The core will
be a metal bar approx. dimensions 6-inches x 1/2-inch x 1/4 inch.
I have no idea of the iron content.
Some questions I have:
1. Suggested gauge for magnet wire to use. I have plenty of 37 gauge
wire, but I can purchase other sizes if necessary.
2. How well should I insulate the core from the coil? Will one layer of
electrical tape suffice? or two layers? or should I use some other
insulating method?
3. Suggested minimum resistence of the coil. (I know the total impedence
will depend on the inductance as well, but I'm just going for a lower
bound on the minimal recommended impedence.) For instance, the coil
in a small AC powered aquarium air pump has a resistence of 6K ohms.
How much lower is it safe to go to?
4. How does a U-shaped core compare with a straight bar in terms a
inductance?
I would appreciate any pointers, help, suggestions you can give.
household AC current (110V/60Hz), and I would like to know about any
precautions and design parameters I should keep in mind. The core will
be a metal bar approx. dimensions 6-inches x 1/2-inch x 1/4 inch.
I have no idea of the iron content.
Some questions I have:
1. Suggested gauge for magnet wire to use. I have plenty of 37 gauge
wire, but I can purchase other sizes if necessary.
2. How well should I insulate the core from the coil? Will one layer of
electrical tape suffice? or two layers? or should I use some other
insulating method?
3. Suggested minimum resistence of the coil. (I know the total impedence
will depend on the inductance as well, but I'm just going for a lower
bound on the minimal recommended impedence.) For instance, the coil
in a small AC powered aquarium air pump has a resistence of 6K ohms.
How much lower is it safe to go to?
4. How does a U-shaped core compare with a straight bar in terms a
inductance?
I would appreciate any pointers, help, suggestions you can give.