AC & DC Motors


YNF repairers AC & DC Motors, Transformers, Welding Machines and manufacture 80 percent of all Electrical Components associated with these devices.

An AC motor is an electric motor driven by an alternating current (AC).

It commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft that is given a torque by the rotating field.

A DC motor is a mechanically commutated electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore so is its current. The current in the rotor is switched by the commutator to also be stationary in space.

DC motors have a rotating armature winding but non-rotatingdc-motors armature magnetic field and a static field winding or permanent magnet. Different connections of the field and armature winding provide different inherent speed/torque regulation characteristics. The speed of a DC motor can be controlled by changing the voltage applied to the armature or by changing the field current. The introduction of variable resistance in the armature circuit or field circuit allowed speed control.