SYNCHRONOUS MOTOR

Quiz 2

Synchronous Motor

is an electric motor that runs at a constant speed, which is synchronize with the frequency of the AC power supply.

Nikola Tesla 1856 - 1943

often referred as the father of modern electrical engineering, made significant contributions to the development of synchronous motor

Michael Faraday 1791 - 1867

He was an English scientist whose work on electromagnetism and electrochemistry laid the groundwork for many technologies, including electric motors.

Charles Proteus Steinmetz 1865 - 1923

He was a German-born American electrical engineer whose ideas on alternating current systems helped inaugurate the electrical era in the USA

He obtained 200 patents

Leonard A. Bairstow 1869 - 1941

He was an English aeronautical engineer best remembered for his work in aviation and for his methods of arbitrary finding the roots of polynomials

He made significant contributions to the understanding of synchronous machines, particularly in the area of stability analysis

Zenobe Gramme 1826 - 1901

He was an inventor best known for creating the gramme dynamo, one of the first practical electric generators

Mikhail Dolivo-Dobrovolsky 1891-1893

developed the first practical three-phase synchronous motor in Germany.

George Westinghouse 1893

At the Chicago World’s Fair, he demostrated polyphase power transmission, including synchronous motors

1895 Niagara Falls hydroelectric power station

one of the earliest large-scale applications of synchronous motors and polyphase AC power systems, began operation

Stator

consist of laminated iron core, which minimizes eddy current losses

Rotor

contains windings that can be excited with DC current via slip rings and brushes, or it has Permanent Magnet Synchronous Motor (PMSMs)

Damper Windings

consists of bars embedded in the pole faces of the rotor, similar to the squirrel cage in induction motor.

Hunting

occurs when the rotor tends to oscillate back and forth around synchronous speed due to the sudden load changes or other disturbance

Exciter

is a small generator that supplies the direct current needed to power the rotor of a synchronous motor.

Slip Rings

are mounted on the rotor shaft to transfer DC excitation current from external source to the rotor windings

Brushes

conductive carbon or graphite maintain contact with the slip rings, allowing DC current to flow into the rotor windings

Fans

mounted on the rotor shaft circulate air over the windings and core, dissipating heat.

Bearings

keep the rotor correctly aligned within the stator and reduces friction

Permanent Magnet Synchronous Motor

are embedded in the rotor, providing a constant magnetic field.

Synchronous Motor

is a motor that rotates at constant speed which is synchronize with the frequency supply

Magnetic locking 

when two unlike poles are brought near each other, there exists a tremendous force of attraction between those two poles

Direct-Current Excited Synchronous Motor

its rotor consist of windings that will be energized by external DC supply