Synchronous Motor

Difference between Induction Motor and Synchronous Motor

Constructional Difference : Synchronous Motor :      We know that every electric motor gives mechanical energy ( rotation of shaft ) as the output when an electrical potential ( electrical energy ) is applied as the input (…

Hunting in Synchronous Motor - Causes & Prevention

What is Hunting (or) Surging (or) Phase Swinging ?      When a synchronous motor is loaded, there exists a phase angle between rotor and field ' α '. When load increases slowly, angle ' α ' also increases so t…

Power Flow Diagram & Power Developed by Synchronous Motor

The phasor diagram of a synchronous motor is shown below. From the phasor diagram, Let     V = Supply voltage / phase      I a   = Armature current / phase      R a   = Armature resistance / phase      α  = Load angl…

V Curves and Inverted V Curves of Synchronous Motor

The performance characteristics of a synchronous motor are obtained by v-curves and inverted v-curves. Synchronous machines have parabolic type characteristics ( the graph drawn is in the shape of parabolic ). If the exc…

Synchronous Condenser and Power Factor Correction

Synchronous Condenser ( or ) Synchronous Capacitor :      If a  synchronous motor is on no-load and over-excited ( E b   >   V  ) then the current drawn by it leads the voltage by nearly 90°. The phasor diagram of the m…

Starting Methods of Synchronous Motor

A device that converts electrical energy into mechanical energy running at synchronous speed is called  Synchronous Motor . Its speed is constant irrespective of load. It is a doubly excited machine because its field wind…

Construction Details of Synchronous Motor

As there is no constructional difference between dc generator and dc motor, similarly, there is no difference between the construction of a synchronous motor and synchronous generator ( alternator ).      The constructio…

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