Why Arw Generators Poles Laminated

What is the use of back emf.

Why arw generators poles laminated.

A graphite brushes. The rotor rotates the stator are the windings surrounding the rotor. 1 the stator windings and 2 the stator core. Is generator a and b will be a 2.

Generator a has wave wound armature while generator b has lap wound armature. Can series generator be turned on off load similar. Usually the rotor has windings that become a electromagnet. Eddy current losses are the circular losses which occurs due to rotation of the armature.

The stator core is made up of thousands tens of thousands or hundreds of thousands. 1 c 3. This action charges the engine s battery. Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b.

If we doesn t laminated the coils huge power losses will occur and large amount of heat. That is why armature of dc machines either motor or generator is laminated. The individual iron pieces that make up the armature are referred to as laminations. 2 d 1.

Where the fleming s left hand rule and right hand. But if you ve ever taken out a flywheel you d notice the stator core isn t a piece of solid metal. A turbogenerator stator is comprised of two major components. Note thinner the laminations greater is the resistance offered to induced e m f.

3 b 3. Illustrates a simplified threephase two pole ac generator. Lamination of a dc generator coils reduces the eddy current losses. The voltage wave phase b begins one third of the way into the a wave cycle and the c wave.

Instead it s segmented into hundreds of laminations. Two generators a and b have 6 poles each. The squirrel cage rotor consists of laminated steel in the core with evenly spaced bars of copper or aluminum placed axially around the periphery permanently shorted at the ends by the end rings. Now a conductor that passes through a moving.

The poles of the generator are the magnetic poles that induce a voltage. Does series generator has any residual magnetism s. Why back emf genrate. This is why armature cores are made up of many thin pieces of iron rather than a large solid piece.

As the stator rotates it generates an electromagnetic field that flows from north pole to south pole similar to the spin of the earth. What do you mean by single re entrancy and double. With laminated armature eddy current losses are reduced to very less. Why current dose not increase in shunt generator a.

Therefore smaller the current hence lesser eddy current loss. In generators and alternators the rotor designs are salient pole or cylindrical.