Increasing Magnetic Field & Decreasing Heat
Increasing Magnetic Field & Decreasing Heat
(OP)
Hello, and thanks to anyone who helps.
I'm working on a project for school and am trying to get a small electromagnet to pull and repel a permanent magnet. It needs to pull and repel the magnet about 2 inches. Would using a Stronger permanent magnet help? The magnets in question are not much larger than one's index finger.
My question concerns building the electromagnet. I understand that increasing the coils and current can increase the field. I believe if the current is increased that it will get hotter, and in my case begin to melt my plastic insulation. So I am wondering how I would decrease the temperature of this. If I were to use more wiring would that help? Any suggestions would be great, Thx.
-SSmith
I'm working on a project for school and am trying to get a small electromagnet to pull and repel a permanent magnet. It needs to pull and repel the magnet about 2 inches. Would using a Stronger permanent magnet help? The magnets in question are not much larger than one's index finger.
My question concerns building the electromagnet. I understand that increasing the coils and current can increase the field. I believe if the current is increased that it will get hotter, and in my case begin to melt my plastic insulation. So I am wondering how I would decrease the temperature of this. If I were to use more wiring would that help? Any suggestions would be great, Thx.
-SSmith





RE: Increasing Magnetic Field & Decreasing Heat
RE: Increasing Magnetic Field & Decreasing Heat
Are you using AC or DC exitation? DC is going to be easier.
You need to think about the magnetic path. If teh magnetic field "flows" through iron then that is a good path. Air is really rubbish as a magnetic path. The trick is to make the iron core of the electromagnet wrap around and get close to the permanent magnet. Look at the ironwork design of pulling solenoids. The sliding core is surrounded by the ironwork. This is the only way you will get a high pulling/pushing force.
RE: Increasing Magnetic Field & Decreasing Heat
TTFN
RE: Increasing Magnetic Field & Decreasing Heat