Tech:Electrical/Alternator/Principle Of Generation Of Electricity
Electromagnetic Induction
When magnetic flux is cut by an electrical conductor moving within a magnetic field, Electromotive force (Induction Voltage) ill be created in the conductor, And a current will flow if the conductor is part of complete circuit.
[Insert Image]
As shown in the illustration, The needle of a galvanometer (An ammeter which is activated by even the slightest amount of current) Will move due to the electromotive force created when a conductor is moved back and forth between magnetic north and south poles. From this action we can observe that:
- The needle of the galvanometer will move when either the conductor or a magnet is moved.
- The direction in which the needle deflects will vary with the direction the conductor or magnet is moved.
- The extent of needle deflection will be greater in proportion to the speed of movement.
- The needle will not move when movement is stopped.
If, By some means, The conductor is caused to pass through the magnetic flux, Electromagnetic force will be created in the conductor. This phenomenon is referred to as "Electromagnetic Induction". The generator produces electromotive force by means of electromagnetic induction, And turns this into electrical power (Voltage and Current).
Back to Alternator
Back to Main Page