DIY magnetic heater

Eddy currents generated in a conductor when exposed to a magnetic field can be used as a heat source. Proof of this is a simple heater. Such a device is easy to assemble at home; you just need to have neodymium magnets and a small electric motor.

Materials:

Thin plywood;
Neodymium magnets -
electric motor;
copper tube;
board.

Magnetic heater manufacturing process

You need to cut a disk with a diameter of 15-25 cm out of plywood. It needs to be marked to evenly place the magnets around the circumference. Then the seats are visible underneath them, and the magnets are glued into the holes with alternating polarities. There is a hole in the center of the disk into which a sleeve is glued to place it on the electric motor shaft.

The engine must be mounted vertically with the shaft up. This can be done by installing studs and screwing them to the board. A disk with magnets is placed on the motor.

Then a ring is bent from the copper tube. The edges of the tube are turned to the side. The diameter of the ring should be such that when placed above the disk, the magnets are strictly below it along the entire circumference.

A ring of copper tube is placed above the disk with magnets with a gap of 2 mm.To attach it, you need to make a stand from a board and attach it to the sole. Now when you start the engine, the tube will heat up from the magnetic field. The faster the speed, the stronger the heating.

You can also place a copper strip over the magnets instead of a ring. Since it is smaller and wider, it is capable of heating up to the melting temperature of solder. Thus, the thermal power of the magnetic field is sufficient not only to demonstrate this phenomenon, but also for practical application.