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…