Why Arw Generators Poles Laminated

As the stator rotates it generates an electromagnetic field that flows from north pole to south pole similar to the spin of the earth.

Why arw generators poles laminated.

Now a conductor that passes through a moving. If we doesn t laminated the coils huge power losses will occur and large amount of heat. The individual iron pieces that make up the armature are referred to as laminations. The stator core is made up of thousands tens of thousands or hundreds of thousands.

Note thinner the laminations greater is the resistance offered to induced e m f. Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b. A turbogenerator stator is comprised of two major components. Is generator a and b will be a 2.

1 c 3. Illustrates a simplified threephase two pole ac generator. What is the use of back emf. The ratio of the induced e m f.

The poles of the generator are the magnetic poles that induce a voltage. Generator a has wave wound armature while generator b has lap wound armature. The voltage wave phase b begins one third of the way into the a wave cycle and the c wave. This action charges the engine s battery.

A graphite brushes. Does series generator has any residual magnetism s. Lamination of a dc generator coils reduces the eddy current losses. Why current dose not increase in shunt generator a.

Therefore smaller the current hence lesser eddy current loss. These individual thin pieces have a higher resistance than one solid piece and therefore produce less eddy currents and experience lower eddy current loss. This is why armature cores are made up of many thin pieces of iron rather than a large solid piece. 1 the stator windings and 2 the stator core.

Usually the rotor has windings that become a electromagnet. Where the fleming s left hand rule and right hand. With laminated armature eddy current losses are reduced to very less. In generators and alternators the rotor designs are salient pole or cylindrical.

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. Eddy current losses are the circular losses which occurs due to rotation of the armature. That is why armature of dc machines either motor or generator is laminated. Two generators a and b have 6 poles each.

3 b 3. Why back emf genrate. 2 d 1. Can series generator be turned on off load similar.

Instead it s segmented into hundreds of laminations. But if you ve ever taken out a flywheel you d notice the stator core isn t a piece of solid metal.