Why Arw Generators Poles Laminated

Is generator a and b will be a 2.

Why arw generators poles laminated.

A turbogenerator stator is comprised of two major components. With laminated armature eddy current losses are reduced to very less. Therefore smaller the current hence lesser eddy current loss. If we doesn t laminated the coils huge power losses will occur and large amount of heat.

This action charges the engine s battery. That is why armature of dc machines either motor or generator is 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. Eddy current losses are the circular losses which occurs due to rotation of the armature.

Why back emf genrate. The voltage drop for which of the following types of brush can be expected to be least. Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b. What is the use of back emf.

A graphite brushes. The poles of the generator are the magnetic poles that induce a voltage. Does series generator has any residual magnetism s. Two generators a and b have 6 poles each.

1 c 3. Generator a has wave wound armature while generator b has lap wound armature. 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. This is why armature cores are made up of many thin pieces of iron rather than a large solid piece.

But if you ve ever taken out a flywheel you d notice the stator core isn t a piece of solid metal. 1 the stator windings and 2 the stator core. Lamination of a dc generator coils reduces the eddy current losses. Note thinner the laminations greater is the resistance offered to induced e m f.

Where the fleming s left hand rule and right hand. Usually the rotor has windings that become a electromagnet. The rotor rotates the stator are the windings surrounding the rotor. These individual thin pieces have a higher resistance than one solid piece and therefore produce less eddy currents and experience lower eddy current loss.

Now a conductor that passes through a moving. The stator core is made up of thousands tens of thousands or hundreds of thousands. The ratio of the induced e m f. The voltage wave phase b begins one third of the way into the a wave cycle and the c wave.

Why current dose not increase in shunt generator a. 3 b 3. What do you mean by single re entrancy and double. The individual iron pieces that make up the armature are referred to as laminations.

2 d 1. Illustrates a simplified threephase two pole ac generator.