Introduction to Generator
When a current carrying coil is placed in a magnetic field, a torque acts on it that rotates the coil. What happens if a coil of wire is rotated in magnetic field ? Can a current be produced in the coil ? The answer is Yes. Such device is called current generator. The current generator is a device that converts the mechanical energy into electrical energy. The Faraday's law said that, when a coil is rotated in a magnetic field, by some mechanical force, the magnetic flux changes in the coil, and in the result an emf is produced in it. If the generator is connected to an external circuit, an electric current is the output of the generator.
Composition of Generator
The generator is made up of several parts. The three major parts are,
These parts is further subdivided into many parts.
Self Exciter Part
Making of Multiple Generator
Making a generator is a very simple task. Everyone can make this without doing much effort. Instruments which are using in this project are very cheap and everyone can afford it. There are some steps by which we could make our multiple generator.
Instruments which are using
Steps to make it
There are some steps by which we could make our generator.
First of all, do attach 4 magnets on CD, with equal spacing by using glue. For making the equal spaces, draw two lines perpendicular to each other from the center of the CD.
Make 5 coils of a wire of 38 SWG by giving about 500 turns. This is a tough job for you. Make coils in such a way, that we should have 2 ends of the wire.
Attach these coils on another CD. Connect 5 LEDs with the ends of the wire. Make sure that, you have connected the LEDs in a proper way. You should know about the polarities of the LEDs.
A CD which have magnets on it should be placed on the other CD, which have coils. Make sure that, there should be some space between them.For making some space, use washer between these two CDs.
Put a bolt in the center of the CDs, which will help them to rotate easily. To make our generator more beautiful, attach a color paper on the upper CD. Rotate the CD so fast as you can. As the result of rotation, magnetic field will change inside the coils. Due to this change, the LEDs will glows.The glowness of the LEDs will depend upon the rotation of the CD. More mechanical force will produce more electrical energy.
Applications of this concept
There are so many applications of Faraday's law of electromagnetic induction. Some are,
Similarities between Motor and Generator
There are some Similarities between electric motor and generator which are,
Differences between Motor and Generator