A distributed winding in which the individual coils of each phase group per pole are concentric and have different coil spans.

Difference between alternating quantity and its fundamental component.

Coil of square or rectangular insulated magnet wire preformed to fit into winding slots.

An armature winding in which the coil ends are connected to alternate commutator segments.

Part of a device, composed of magnetic material and intended to complete a magnetic circuit.

Armature winding with each coil of 2 conductors placed in slots 90° apart, connections made in segments approximately 180° apart on the commutator.

SI unit of power.

Derived SI unit for electromotive force (e.m.f.)

Unequal radial pull on a rotor due to magnetic eccentricities in the air gap.

The rotational force produced by a motor. The units of torque are expressed as pound-foot, pound-inch or newton-meter.