What is damper winding generator?

What is damper winding generator?

The damper winding is used to reduce the winding oscillation. The damper winding consists of heavy copper rods, one in each slot riveted at the ends to common bars one at each end as to form short-circuited grid or rods may be brazed to copper end bars attached.

What is damping in synchronous machine?

Synchronous motors have their pole-shoes slotted for placing copper bars. The copper bars are placed in these slots and short-circuited at both ends by heavy copper rings (like squirrel cage rotor of induction motors). This arrangement is known as damper winding in synchronous motor.

What is a damper winding what is the function of it and where it is located?

The damper winding is nothing but copper bar embedded in the rotor faces. The copper bars are short circuited at both ends. The motion of rotor sets up eddy current in the damper winding. The direction of this eddy current is such that it suppresses the rotor oscillations.

What is the purpose of damper winding in alternator *?

Damper winding in an alternator is also known as squirrel cage winding. This winding is located inside the slotted pole shoes of alternator. A damper winding has a crucial role in alternator as it prevent hunting (momentarily speed fluctuations) in alternator.

What is the use of damper?

A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature and climate control.

How does damper winding prevent hunting?

Damper winding damps out hunting by producing torque opposite to slip of rotor. The magnitude of damping torque is proportional to the slip speed. Use of Flywheels: The prime mover is provided with a large and heavy flywheel. This increases the inertia of prime mover and helps in maintaining the rotor speed constant.

Why damper is used in generator?

To prevent hunting of synchronous generator or to reduces oscillations of the rotor when the motor deviates from synchronism. They increase the stability of large synchronous generators.

What is hunting in synchronous machine?

Hunting is the phenomenon of oscillation of the rotor about its steady state position or equilibrium state in a synchronous motor. Hence, hunting means a momentary fluctuation in the rotor speed of a synchronous motor.

Where is damper winding in synchronous motor?

Damper winding in synchronous machine is placed in the coil slots and short circuited. Thus Damper winding provides the same effect as the squirrel cage winding rotor does in case of induction motor.

What is damping in generator?

Damping in general is needed to reduce unwanted oscillations in a system. Generators will oscillate (seek) and damping is needed to eliminate this unwanted behavior.

What is cogging and crawling?

The important characteristics normally shown by a squirrel cage induction motors are crawling and cogging. These characteristics are the result of improper functioning of the motor that means either motor is running at very slow speed or it is not taking the load.

How does damper winding reduce hunting?

Reduction of Hunting in Synchronous Motor Use of Damper Winding: It consists of low electrical resistance copper / aluminum brush embedded in slots of pole faces in salient pole machine. Damper winding damps out hunting by producing torque opposite to slip of rotor.

What is the function of dampers?

What is damper made of?

Damper, also known as bush bread or seedcake, is a European term that refers to bread made by Australian Aborigines for many thousands of years. Damper is made by crushing a variety of native seeds, and sometimes nuts and roots, into a dough and then baking the dough in the coals of a fire.