Why Arw Generators Poles Laminated

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Construction Of Dc Generator Fig 2 Generation Construction Mechanical Energy

With laminated armature eddy current losses are reduced to very less.

Why arw generators poles laminated.

This action charges the engine s battery. The voltage drop for which of the following types of brush can be expected to be least. Therefore smaller the current hence lesser eddy current loss. Two generators a and b have 6 poles each.

Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b. 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. Is generator a and b will be a 2. 3 b 3.

Usually the rotor has windings that become a electromagnet. What do you mean by single re entrancy and double. The stator core is made up of thousands tens of thousands or hundreds of thousands. This is why armature cores are made up of many thin pieces of iron rather than a large solid piece.

The individual iron pieces that make up the armature are referred to as laminations. Eddy current losses are the circular losses which occurs due to rotation of the armature. A graphite brushes. That is why armature of dc machines either motor or generator is laminated.

The ratio of the induced e m f. Where the fleming s left hand rule and right hand. Illustrates a simplified threephase two pole ac generator. In generators and alternators the rotor designs are salient pole or cylindrical.

If we doesn t laminated the coils huge power losses will occur and large amount of heat. The poles of the generator are the magnetic poles that induce a voltage. 1 c 3. Now a conductor that passes through a moving.

Why current dose not increase in shunt generator a. Instead it s segmented into hundreds of laminations. A turbogenerator stator is comprised of two major components. 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. Can series generator be turned on off load similar. These individual thin pieces have a higher resistance than one solid piece and therefore produce less eddy currents and experience lower eddy current loss. 2 d 1.

What is the use of back emf. As the stator rotates it generates an electromagnetic field that flows from north pole to south pole similar to the spin of the earth. 1 the stator windings and 2 the stator core. The rotor rotates the stator are the windings surrounding the rotor.

Why back emf genrate. The voltage wave phase b begins one third of the way into the a wave cycle and the c wave.

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