I'm just getting into electronics, and I would like to build an electromagnetic mixer. See here. Most of the tutorials I have found have magnets stuck to a motor spinning under a non magnetic material causing a piece of ferrous material attracted to the magnet to spin in a glass or plastic container.
I'm thinking of one with NO moving parts to wear out: instead of a motor spinning, have a series of electromagnets in a circular pattern. I'm thinking 8 equally spaced from each other (octagon with them at the corners). It would work by energizing two of the electromagnets at a time across from each other in the circle with opposite poles, one North the other South. Then quickly turn off those two and energize the next two opposing electromagnets in the series in a clockwise direction.This turning on and off would cause the ferrous material to spin. By controlling how fast the magnets swap you would control the spin.
Now the Help I need:
- Is this feasible?
- How do I control the turning on and off, using simple components.
- I would like to use a 10k ohm potentiometer to control the rate of spin (magnet swap). Mainly because I have one laying around.
- Since each magnet will be energized in ether direction at some point in the sequence, how do I swap it.
- Would I require a cooling system?
(Key Point of Design: NO moving Parts)
Thanks in advance for any help given. I'm a student mechanical engineer, whose got a love of electronics and control systems I really want to get seriously into electronics.