Why Arw Generators Poles Laminated

Two generators a and b have 6 poles each.

Why arw generators poles laminated.

Illustrates a simplified threephase two pole ac generator. This action charges the engine s battery. Why back emf genrate. In generators and alternators the rotor designs are salient pole or cylindrical.

What is the use of back emf. 1 c 3. 1 the stator windings and 2 the stator core. Usually the rotor has windings that become a electromagnet.

If we doesn t laminated the coils huge power losses will occur and large amount of heat. The voltage wave phase b begins one third of the way into the a wave cycle and the c wave. Does series generator has any residual magnetism s. These individual thin pieces have a higher resistance than one solid piece and therefore produce less eddy currents and experience lower eddy current loss.

Can series generator be turned on off load similar. Generator a has wave wound armature while generator b has lap wound armature. That is why armature of dc machines either motor or generator is laminated. The poles of the generator are the magnetic poles that induce a voltage.

Is generator a and b will be a 2. The voltage drop for which of the following types of brush can be expected to be least. This is why armature cores are made up of many thin pieces of iron rather than a large solid piece. Note thinner the laminations greater is the resistance offered to induced e m f.

Where the fleming s left hand rule and right hand. Why current dose not increase in shunt generator a. 3 b 3. Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b.

Instead it s segmented into hundreds of laminations. But if you ve ever taken out a flywheel you d notice the stator core isn t a piece of solid metal. The stator core is made up of thousands tens of thousands or hundreds of thousands. What do you mean by single re entrancy and double.

With laminated armature eddy current losses are reduced to very less. Therefore smaller the current hence lesser eddy current loss. Eddy current losses are the circular losses which occurs due to rotation of the armature. The ratio of the induced e m f.

2 d 1. The rotor rotates the stator are the windings surrounding the rotor. A graphite brushes. Now a conductor that passes through a moving.

Lamination of a dc generator coils reduces the eddy current losses. 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.