The electric motor of the distorted field has featured among the various types of electric motor of single-phase induction, because it has a reliable, economical and simple starting process.
The distorted field engine or shaded pole is divided into three types: salient poles distributed windings and skeleton type. The salient poles is the most common electric motor.
A part of each of the poles is embraced by a copper coil placed in short-circuit. The current that is made in this loop allows the flow through means that there is a delay in relation to the flow of the part which is not embraced by it.
The result will be a rotating field that will move toward the part where the pole is not embraced and this will cause the electric motor to reach the rated speed.