Know about Electric Motors & Generators
Electric motors and generators, the group of devices for converting mechanical energy into electrical energy or electrical energy into mechanical energy, by electromagnetic means (see Energy). One machine, the mechanical energy into electricity is a generator, alternator or generator, and a machine that converts electrical energy into mechanical energy is also used as a motor.
Two physical principles which underlie the operation of generators and motors. The first is the principle of electromagnetic induction discovered British scientist Michael Faraday in 1831. When a conductor through a magnetic field, or, if the strength of the magnetic field on the conducting loop is varied, a current is set up or induced in the conductor (see induction). The discussion of this principle is that of electromagnetic reaction, first by the French physicist A. Marie Ampere in 1820. If a current through a conductor in a magnetic field, the field exerts a mechanical force on it. See Magnetism. Read more…