Why Arw Generators Poles Laminated

Therefore smaller the current hence lesser eddy current loss.

Why arw generators poles laminated.

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. Why current dose not increase in shunt generator a. Instead it s segmented into hundreds of laminations. Does series generator has any residual magnetism s.

Illustrates a simplified threephase two pole ac generator. Can series generator be turned on off load similar. Two generators a and b have 6 poles each. The voltage wave phase b begins one third of the way into the a wave cycle and the c wave.

1 c 3. This action charges the engine s battery. What is the use of back emf. Lamination of a dc generator coils reduces the eddy current losses.

The individual iron pieces that make up the armature are referred to as laminations. That is why armature of dc machines either motor or generator is laminated. 2 d 1. Where the fleming s left hand rule and right hand.

The rotor rotates the stator are the windings surrounding the rotor. Now a conductor that passes through a moving. With laminated armature eddy current losses are reduced to very less. As the stator rotates it generates an electromagnetic field that flows from north pole to south pole similar to the spin of the earth.

The stator core is made up of thousands tens of thousands or hundreds of thousands. In generators and alternators the rotor designs are salient pole or cylindrical. Usually the rotor has windings that become a electromagnet. Why back emf genrate.

Eddy current losses are the circular losses which occurs due to rotation of the armature. Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b. Note thinner the laminations greater is the resistance offered to induced e m f. Generator a has wave wound armature while generator b has lap wound armature.

This is why armature cores are made up of many thin pieces of iron rather than a large solid piece. If we doesn t laminated the coils huge power losses will occur and large amount of heat. 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.

A turbogenerator stator is comprised of two major components. These individual thin pieces have a higher resistance than one solid piece and therefore produce less eddy currents and experience lower eddy current loss. A graphite brushes. Is generator a and b will be a 2.

But if you ve ever taken out a flywheel you d notice the stator core isn t a piece of solid metal. The poles of the generator are the magnetic poles that induce a voltage.