Why Are Generators Poles Laminated

Eddy current loss produce heat and decrease motor efficiency.

Why are generators poles laminated.

Ge s laminated salient poles motors have laminated poles fitted with strip or wire wound field coils and supplied with a shock absorbing winding on the outer pole face. There are 2 main types of synchronous generator. Each has a stator carrying a three phase winding distributed over its inner periphery. This standard speed is brought about by the number of poles that the generator portion of a generator has in its.

As the energized rotor rotates. Salient pole generators will have typical speed about 100 to 375 rpm. In general the cylindrical rotor type machines are confined to 2 and 4 pole turbine generators while salient pole types are built with 4 poles upwards and include most classes of duty. This type of rotor has many no of poles that are manufactured on the wheel like arrangements.

Eddy current losses are directly proportional to the area of the armature or more precisely the path of motion. A graphite brushes. Why is armature of dc generator laminated. Is generator a and b will be a 2.

Be the first to answer. Salient poles are laminated in order to reduce eddy currents. 2 d 1. The standard product platform of our laminate salient poles motors can be rapidly adapted to support a variety of specific customer applications and starting methods.

Both classes of machine are similar in stator construction point of view. 1 c 3. They are used in hydraulic turbines or diesel engines. Why are generator poles laminated.

Generator a has wave wound armature while generator b has lap wound armature. An energized turbine generator rotor creates an electromagnetic field with lines of force traveling from north pole to south pole very much like that of planet earth. Eddy current is the form of power loss and magnetic loss. 3 b 3.

Consider an armature with a single piece of iron. Unknown 6 february 2015 at 17 14 to decrease losses because of eddy currents that may generate in the field poles if they were not laminated. As the speed of the water turbine is slow hence more number of poles are required to attain the frequency. The voltage drop for which of the following types of brush can be expected to be least.

The ratio of the induced e m f. These poles are constructed from steel and are laminated.