Separated paraLLEL COILS WITH MAGNETIC FLUX INTO ONE

1. Feb 22, 2013

dennisk

I have two parallel air coils attached to each other but separated by 3" of air. if I move a magnet past one coil it will induce a magnetic flux into it and that will create a voltage across it. Will that voltage transfer to the other coil thereby creating a magnetic pulse in the second coil? Is there a way to add components to create the second coil magnetic field? This is using only a magnet and not an electronic power source.

Last edited: Feb 22, 2013
2. Feb 22, 2013

Simon Bridge

Welcome to PF;
If the two coils are attached in the sense of being electrically connected - so a current on one flows in the other, then yes. That's how power gets from the power station to your appliances.

3" is pretty close though so it is probably better to model the pair as a single inductor.
I suspect you are grappling with mutual vs self inductance.
http://spiff.rit.edu/classes/phys213/lectures/henry/henry_long.html

3. Feb 23, 2013

dennisk

I am working on a motor. Two coils electrically attached and glued with ends sitting on top of a dvd disc separated by 2" of air space. One inside and another outside of disc. I have another disc under this one with bearings to allow it to turn. The second disc has a magnet that will induce a voltage into the inside coil above as it passes underneath. There is a second magnet timed to be just past the outside coil . When the inside coil energizes and creates voltage in the outside coil I think it will repel the outside magnet creating force to turn the lower disc. This is what I'm after. If I wire this correctly the outside coil will energize the inside coil first to repel then the inside coil will energize the outside coil as well to attract. One attracting and the other repelling back and forth. I have ordered an oscilloscope to look at signals but atm. I cant. I hope I explained this well enough. I have 33 years working for NCR Corporation but it was on computers and not motors. Thank you