Toroidal helical coils have applications in electrical machinery such as transformers, motors, and antennas. This Demonstration shows some examples of the geometry of toroidal coils with helical windings.
The wire helices of the coil are called windings. Each loop of the wire is called a turn. The shape of the turns can be circular or square.
In this Demonstration, one winding of up to 48 turns or two windings of up to 24 turns are considered. The shape of the turn can be square or circular and the windings can be left- or right-handed.