Monthly Archives: April 2017

Coil-coil interaction

In blenders, drills, mixers the electric motors do not have magnets, in their place and carrying out the same function we see coils, as well as in the shaft as well as outside.

When an engine of this model is put into operation, it starts to have electric current in the coils fixed to the casing and also in one of the coils fixed on the shaft. Each of them generates a magnetic field in the region. The first two are intended to create a magnetic field in the region where the axis is located.

The coil with current attached to the axis will “detect” this magnetic field, that is, on it will exert the magnetic force, and therefore it rotates along with the axis. To understand, we can idealize that each of these coils has only one revolution , That the electric current in the coil attached to the shaft is subjected to a pair of magnetic forces and, therefore, creates the rotation of the shaft.

worm gear reducer morse

If it had only this coil, the spin would not be completed, because the forces were not able to move coil when they had the same direction of the magnetic field. This is how the motor shaft has several coils instead of one.