Working Principle of Electric Generator

Working Principle of Electric Generator

When a conductor strikes in a magnetic field, an emf is triggered throughout the conductor. This is the only groundwork on which every and each rotating electric generator works. Let us talk about the count in a little bit small print so that we can without problems understand how does an electrical generator certainly work.

According to Faraday’s regulation of electromagnetic induction, when a conductor hyperlinks with a changing flux, it will have a caused emf throughout it. The cost of caused emf across the conductor depends on the fee of change of flux linkage with the conductor. The path of the caused emf in the conductor can be determined with the aid of Fleming’s Right Hand Rule.


This principle says that if you throw your thumb on your right hand, the first finger and the other finger are multiple and if you straighten your right-hand thumb. along the path of action of the conductor in the magnetic field, and first finger along the path of the magnetic field, then you the second finger suggests the direction of emf in the conductor.
Now we will exhibit you how does electricity get produced when we rotate a single loop of a conductor in a magnetic field.

During rotation, when one side of the loop comes in front of the magnetic north pole, the instant movement of the conductor will be upward subsequently according to Fleming’s Right Efficiency in the principle of hand will have an internal direction.
At the identical time, any other aspect of the loop comes in the front of the magnetic south pole, the on the spot motion of the conductor will be downward therefore according to Fleming’s Right Hand Rule the triggered emf will have outward direction.

During rotation, each facet of the loop comes underneath magnetic north pole and south pole alternately. Again in the pictures, when any of the coil sides (conductors) comes beneath north pole the motion of the conductor would be upward and when it comes below south pole the movement of the conductor would be downward. Hence, the emf precipitated in the loop alters its direction continuously.

This is the most fundamental conceptual mannequin of an electric powered generator. We additionally name it a single loop electric generator. We can collect the caused emf in the loop in two exclusive ways.


Contact us slip ring with both ends of the loop. We can connect with a loop with brush rest, as shown. In this case, the alternating electrical energy produced in the loop comes the load. This is an AC electric generator.

We can additionally acquire the electrical energy produced in the rotating loop through commutator and brush arrangement as shown in the animated picture below. In this case, the electricity produced in the loop (here the rotating loop of the single loop generator can also be referred as the armature) receives rectified through the commutator and the load receives a DC power. This is the most basic conceptual mannequin of a DC generator.

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