Why Arw Generators Poles Laminated

The individual iron pieces that make up the armature are referred to as laminations.

Why arw generators poles laminated.

The rotor rotates the stator are the windings surrounding the rotor. The stator core is made up of thousands tens of thousands or hundreds of thousands. That is why armature of dc machines either motor or generator is laminated. Now a conductor that passes through a moving.

Generator a has wave wound armature while generator b has lap wound armature. A turbogenerator stator is comprised of two major components. If we doesn t laminated the coils huge power losses will occur and large amount of heat. A graphite brushes.

Therefore smaller the current hence lesser eddy current loss. Lamination of a dc generator coils reduces the eddy current losses. These individual thin pieces have a higher resistance than one solid piece and therefore produce less eddy currents and experience lower eddy current loss. As the stator rotates it generates an electromagnetic field that flows from north pole to south pole similar to the spin of the earth.

What do you mean by single re entrancy and double. 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. The voltage drop for which of the following types of brush can be expected to be least. 1 c 3.

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. Does series generator has any residual magnetism s.

3 b 3. Can series generator be turned on off load similar. Why current dose not increase in shunt generator a. Illustrates a simplified threephase two pole ac generator.

The ratio of the induced e m f. Note thinner the laminations greater is the resistance offered to induced e m f. Eddy current losses are the circular losses which occurs due to rotation of the armature. Where the fleming s left hand rule and right hand.

1 the stator windings and 2 the stator core. Is generator a and b will be a 2. The poles of the generator are the magnetic poles that induce a voltage. But if you ve ever taken out a flywheel you d notice the stator core isn t a piece of solid metal.

The voltage wave phase b begins one third of the way into the a wave cycle and the c wave. Two generators a and b have 6 poles each. 2 d 1. What is the use of back emf.

With laminated armature eddy current losses are reduced to very less. Instead it s segmented into hundreds of laminations.