Why Arw Generators Poles Laminated

Why current dose not increase in shunt generator a.

Why arw generators poles laminated.

Now a conductor that passes through a moving. 1 c 3. 3 b 3. The individual iron pieces that make up the armature are referred to as laminations.

In generators and alternators the rotor designs are salient pole or cylindrical. Note thinner the laminations greater is the resistance offered to induced e m f. If we doesn t laminated the coils huge power losses will occur and large amount of heat. This action charges the engine s battery.

Therefore smaller the current hence lesser eddy current loss. This is why armature cores are made up of many thin pieces of iron rather than a large solid piece. Can series generator be turned on off load similar. Is generator a and b will be a 2.

These individual thin pieces have a higher resistance than one solid piece and therefore produce less eddy currents and experience lower eddy current loss. Usually the rotor has windings that become a electromagnet. Two generators a and b have 6 poles each. Generator a has wave wound armature while generator b has lap wound armature.

What is the use of back emf. Does series generator has any residual magnetism s. Where the fleming s left hand rule and right hand. The ratio of the induced e m f.

Why back emf genrate. The poles of the generator are the magnetic poles that induce a voltage. 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. That is why armature of dc machines either motor or generator is laminated.

2 d 1. 1 the stator windings and 2 the stator core. The voltage wave phase b begins one third of the way into the a wave cycle and the c wave. Lamination of a dc generator coils reduces the eddy current losses.

Illustrates a simplified threephase two pole ac generator. As the stator rotates it generates an electromagnetic field that flows from north pole to south pole similar to the spin of the earth. But if you ve ever taken out a flywheel you d notice the stator core isn t a piece of solid metal. Eddy current losses are the circular losses which occurs due to rotation of the armature.

Instead it s segmented into hundreds of laminations. Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b. With laminated armature eddy current losses are reduced to very less. The voltage drop for which of the following types of brush can be expected to be least.

What do you mean by single re entrancy and double. A turbogenerator stator is comprised of two major components.