Induction Motors

Quiz 3 lesson 5

Induction Motor

also called asynchronous motor is a type of motor that runs on alternating current that converts electrical energy into mechanical energy

Galileo Ferraris and Nikola Tesla 1885-1888

independently discovered rotating magnetic field principle which allows induction motors to operate without mechanical contact

Mikhail Dolivo-Dobrovolsky 1889

invention of the squirrel-cage rotor

1893

Chicago World’s Fair showcase the AC power’s superiority

early 1900s

standardization of AC Power and commercialization

1980s

Introduction of Variable Frequency which allows precise speed and torque control

2000s to present

Advancement in Energy efficiency

Stator

stationary part of the motor which houses the windings and produces a rotating magnetic field when AC voltage is applied

Rotor

rotating part of the motor’s electromagnetic circuit

Bearings

are critical components that support the motor’s rotating shaft, allowing it to spin freely with minimal friction

End rings

metal rings at each end of squirrel cage rotor that connect the conductive bars, completing the electrical circuit

Frame

serves as the skeleton that holds all other components in

End bells

frame of an induction motor serves as the skeleton

Cooling fan

essential part of of the motor’s thermal management system by circulating air over the motor, it helps dissipate heat generated

Shaft

providing the means to transfer mechanical power from the motor to the driven equipment

Stator Windings

consist of tightly coiled wires and are key to its functionality.

Capacitor

are employed in some types of induction motors, primarily single-phase one, to improve starting torque and ensure smooth running conditions

Single-Phase induction motor

supplies the primary winding and produces a pulsating magnetic fieldT

Three-Phase Induction Motor

three wires provide the same voltage, but each phase in ramped up