What are the two types of synchronous motor?

There are two major types of synchronous motors depending on how the rotor is magnetized: non-excited and direct-current excited.

• Non-excited motors.
• DC-excited motors.
• Examples.
• Use as synchronous condenser.
• Steady state stability limit.
• Other.

What is the difference between synchronous and non synchronous generation?

A synchronous generator is called “synchronous” because the waveform of the generated voltage is synchronized with the rotation of the generator. An asynchronous generator is essentially the same machine as an asynchronous or induction motor. …

What is a synchronous phase modifier?

Synchronous phase modifier is a synchronous motor that runs without mechanical load, and is provided with means for varying its power factor to simulate a capacitive or inductive reactor; used in voltage regulation of alternating-current power systems.

What are the different methods for the starting of a synchronous motor?

The different methods used to start a synchronous motor are :

• Using Pony Motors : By using the small pony motors like a small induction motor, we can start the synchronous motor.
• Using Small D.C. Machine :
• Using Damper Winding :
• As a Slip Ring Induction Motor ( Synchronous Induction Motor ) :

How do synchronous motors work?

A synchronous motor is one in which the rotor normally rotates at the same speed as the revolving field in the machine. The effect of the stator current is to establish a magnetic field rotating at 120 f/p revolutions per minute for a frequency of f hertz and for p poles. …

Why does the same machine called the synchronous motor and synchronous generator?

A synchronous generator is called “synchronous” because the waveform of the generated voltage is synchronized with the rotation of the generator. Each peak of the sinusoidal waveform corresponds to a physical position of the rotor.

How the operation varies from synchronous generator?

The principle of operation of synchronous generator is electromagnetic induction. If there exits a relative motion between the flux and conductors, then an emf is induced in the conductors.

Synchronous Phase Modifier: For controlling the voltage of a transmission line, at the receiving end, a synchronous motor is used. In this application, the synchronous motor is made to run on no load and draw a leading current. The synchronous motor when used for the above purpose is called synchronous phase modifier.

What is the difference between synchronous condenser and synchronous motor?

Since a synchronous condenser behaves like a variable inductor or a variable capacitor, it is used in power transmission systems to regulate line voltage. Both are synonym of each other. SPM or SC is basically synchronous motor running under no load.

How can the power factor of a synchronous motor be changed?

The power factor of a synchronous motor is changed with a change in the excitation. When the excitation of the motor is increased, the power factor changes from lagging to unity and then to a leading power factor. This property of the motor is utilized to improve the power factor of the leads, having a low lagging power factor.

What is the difference between synchronous condenser and compensator?

Synchronous Condensor is also known as Synchronous Compensator or Synchronous Phase Modifier. A synchronous condenser or a synchronous compensator is a synchronous motor running without a mechanical load.