Important parts of an ac dynamo, Physics

1)The armature ABCD consists of a copper wire wound on cylindrical soft-iron core.The armature can be rotated horizontal axis perpendicular to magnetic field.

2)NS is permanent horseshoe magnet with concave surfaces at poles and provides stationary magnetic field.

3) The two leads of armature coil are connected to two slip-rings S1 and S2. These slip rings are fixed on a shaft which is contact with a soft-iron core. When shaft is rotated with the help of a mechanical energy source, the armature and slip rings rotate in the same axis.

4) B1, B2 are carbon brushes. They are always in contact with slip-rings S1 and S2. These brushes B1 and B2 are connected to external circuit along resistance or load R.

Working: When the armature rotates the magnetic flux linked with it charges and electric current is induced in the coil which flows through the load resistance R. Consider the armature to be in the vertical position and let it rotate in anticlockwise direction. The wires AB move downward and CD move upward and according to Flemings right hand rule the induced current flows from B to A and from D to C. Therefore during the first half rotation of the armature, the current flows in the coil in the direction BADC. During the second half rotation the current flows in the direction CDAB. The magnitude of the induced EMF and the current also change. In this way, alternating current is produced.

1853_Important parts of an AC dynamo.png

Posted Date: 8/28/2012 9:21:04 AM | Location : United States







Related Discussions:- Important parts of an ac dynamo, Assignment Help, Ask Question on Important parts of an ac dynamo, Get Answer, Expert's Help, Important parts of an ac dynamo Discussions

Write discussion on Important parts of an ac dynamo
Your posts are moderated
Related Questions
Consider the 4-f system below where an object is placed at the input plane and is illuminated by a plane wave   The object to the right is placed in the input plane where b

When atoms (or) group of atoms are added, to form more saturated compound it is known as addition reaction.

The refractive indices of a double refracting crystal for extraordinary and ordinary ray are 1.584 and 1.592 respectively for wavelength 5600A 0 . Calculate the thic

Why is quantum mechanics important? Quantum mechanics is important to understand the behavior of systems at atomic length scales and duration smaller. For illustration, when Ne

Explain about the single mode fibres in intermodal dispersion. Into single mode fibers, the core size of the fibre is decreased to 3 to 9µm so that this supports simply axial m

What is Avalanche Breakdown Minority carriers, under reverse biased conditions, flowing through  the  junction  acquires  a  kinetic  energy  that increases  with  increase

Cherenkov [Cerenkov] radiation (P.A. Cherenkov) Radiation emitted through a massive particle that is moving faster than light in the medium by which it is travelling. None of

Draw the graph showing the variation of binding energy per nucleon with mass number. Give the reason for the decline of binding energy per nucleon for nuclei with high mass numbers

an orchestra tunes up for the big concert by playing an A, WHICH RESOUNDS WITH A FUNDAMENTAL FREQUWNCY OF 440HZ FIND THE SECOND AND TIRD HARMONICS OF THIS NOTE

How do I write the equation and units for work for the following question: How much work does Bobby perform in pushing a 35N crate a distance of 4 meters?