Why Arw Generators Poles Laminated

Eddy current losses are the circular losses which occurs due to rotation of the armature.

Why arw generators poles laminated.

What is the use of back emf. Illustrates a simplified threephase two pole ac generator. A graphite brushes. This is why armature cores are made up of many thin pieces of iron rather than a large solid piece.

Therefore smaller the current hence lesser eddy current loss. Why current dose not increase in shunt generator a. This action charges the engine s battery. 2 d 1.

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. Is generator a and b will be a 2. Now a conductor that passes through a moving.

Usually the rotor has windings that become a electromagnet. Does series generator has any residual magnetism s. 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.

Instead it s segmented into hundreds of laminations. Two generators a and b have 6 poles each. 1 c 3. Lamination of a dc generator coils reduces the eddy current losses.

Each of the three coils generates an ac voltage sine wave as illustrated in figure 4a and 4b. The rotor rotates the stator are the windings surrounding the rotor. 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. Can series generator be turned on off load similar.

3 b 3. The stator core is made up of thousands tens of thousands or hundreds of thousands. The voltage drop for which of the following types of brush can be expected to be least. If we doesn t laminated the coils huge power losses will occur and large amount of heat.

That is why armature of dc machines either motor or generator is laminated. What do you mean by single re entrancy and double. A turbogenerator stator is comprised of two major components. Why back emf genrate.

Note thinner the laminations greater is the resistance offered to induced e m f. With laminated armature eddy current losses are reduced to very less. 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 individual iron pieces that make up the armature are referred to as laminations.

Generator a has wave wound armature while generator b has lap wound armature. Where the fleming s left hand rule and right hand.