Why Arw Generators Poles Laminated

Illustrates a simplified threephase two pole ac generator.

Why arw generators poles laminated. The stator core is made up of thousands tens of thousands or hundreds of thousands. What is the use of back emf. Now a conductor that passes through a moving. Where the fleming s left hand rule and right hand.

Does series generator has any residual magnetism s. 2 d 1. If we doesn t laminated the coils huge power losses will occur and large amount of heat. A graphite brushes.

But if you ve ever taken out a flywheel you d notice the stator core isn t a piece of solid metal. Lamination of a dc generator coils reduces the eddy current losses. In generators and alternators the rotor designs are salient pole or cylindrical. The rotor rotates the stator are the windings surrounding the rotor.

With laminated armature eddy current losses are reduced to very less. This is why armature cores are made up of many thin pieces of iron rather than a large solid piece. 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.

The voltage wave phase b begins one third of the way into the a wave cycle and the c wave. The ratio of the induced e m f. What do you mean by single re entrancy and double. Usually the rotor has windings that become a electromagnet.

The individual iron pieces that make up the armature are referred to as laminations. Is generator a and b will be a 2. Instead it s segmented into hundreds of laminations. Therefore smaller the current hence lesser eddy current loss.

Two generators a and b have 6 poles each. 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 poles of the generator are the magnetic poles that induce a voltage. 1 the stator windings and 2 the stator core.

Can series generator be turned on off load similar. Generator a has wave wound armature while generator b has lap wound armature. This action charges the engine s battery. Why back emf genrate.

3 b 3. That is why armature of dc machines either motor or generator is laminated. These individual thin pieces have a higher resistance than one solid piece and therefore produce less eddy currents and experience lower eddy current loss. The voltage drop for which of the following types of brush can be expected to be least.

A turbogenerator stator is comprised of two major components. Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b.