AC MOTORS

AC motors are commonly used on aircraft and are classified by output power. Large motors have over 3KW output and are three-phase, while medium and small motors range from 3KW to 50W and are mostly single-phase. Miniature motors are under 50W. The document then describes various types of AC motors used on aircraft, including induction motors, which are the most widely used type and operate using a rotating magnetic field to induce current in the rotor. Two-phase induction motors can control rotation direction and speed, while split-phase motors use a capacitive winding to phase split the current. Synchronous motors maintain a constant speed set by the rotating magnetic field frequency.