Motors and generators are fundamental in electronics. The principle behind them was discovered by Michael Faraday's in his laws of Induction. Even thought, he had shown continuous magnetic rotation by putting an magnetic wire in an electromagnetic field; Barlow had invented the first device powered by electromagnetism. In 1849, the three phase induction motor was invented which is still used today because it is the most efficient.
Motors and generators are astonishingly the same electronic device. A motor run backwards gives you a generator and a generator run backwards is a motor. For example, if you rotate the axle on an motor it produces electricity and if you run electricity into a generator the axle starts spinning ,giving you a motor. These devices work because of the induction law, which predicts how electromagnetic fields interact with an electric circuit producing EMF (measured in Volts). This states that a moving coil of wire around a magnet generates electricity. Also in terms of a motor an electromagnet gets repelled by other magnets causing it to rotate which turns an axle.
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| Electric Motor |
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