Dc motor science projects.
Dc motor science projects. Here you can learn about how to make a small generator, alternative current 230 V, using a coil without core, a neodymium magnet sphere, a dc motor and a battery, which can light up a bulb 11 W 230 V, Faraday is known for his work regarding electricity and magnetism. Faraday’s law of electromagnetic induction. This law explains the working principle of most of the electrical motors, generators, electrical transformers and inductors. Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be “induced” in the coil. No matter how the change is produced, the voltage will be generated. The change could be produced by changing the magnetic field strength, moving a magnet toward or away from the coil, moving the coil into or out of the magnetic field, rotating the coil relative to the magnet, etc. Faraday’s law is a fundamental relationship which comes from Maxwell’s equations. It serves as a succinct summary of the ways a voltage (or emf) may be generated by a changing magnetic environment. The induced emf in a coil is equal to the negative of the rate of change of magnetic flux times the number of turns in the coil. It involves the interaction of charge with magnetic field.
Small Generator – high voltage !
Components used to build the small generator ( small scale generator ) :
A. 40 ohms coil – inside an Ac motor shredder 230 V
B. 3.7 V dc motor – inside an electric screw driver 3,7 V
C. battery : 3,7 V battery or 12 V Ups cell + PWM controller
D. neodymium magnet sphere 30 or 40 mm diameter
E. metal case screw pot to fix the sphere – remove the inside magnet from the neodymium screw pot magnet
F. plastic tube – used to fix the metal case to the dc motor ax – inside the case of a car toy or buid a metal one – advanced
G. power switch + wires + bulb – 11 W 230 V + socket E 27
Assemble all the components.
see also how to make a simple generator : how to build a simple generator
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