Induction AC Motors

The standard induction AC motors are essentially a with the secondary winding free to rotate.  Induction AC motors are the simplest and the most rugged electric motor and consists of two basic parts; the wound stator and the rotor assembly.  The induction motor gets its name from current flowing in the secondary rotor that is induced by alternating currents flowing in the primary member or stator.  The combined electromagnetic effects of the stator and rotor currents produce the force to create rotation.  The rotors typically are made of a laminated, cylindrical iron core with slots for receiving the conductors.  The most common type of rotor has cast-aluminum conductors and short-circuiting end rings.  Because of the unique appearance, these rotor bars are called squirrel cages.  This squirrel cage rotates when the moving magnetic field induces a current in the shorted conductors.  The speed at which the magnetic field rotates is the synchronous speed of the motor and is determined by the number of poles in the stator and the frequency of the power supply.

Induction AC Motors