An electric motors convert galvanizing energy onto mechanic exclusivelyy skillful energy. Electric motors involve rotating coils of wire that caused by a attractorized force. The magnetic force is exerted by a magnetic subject argona on an electric current. In an electric motor the pitiable part is called the rotor and the stationary part is called the stator. Magnetic palm atomic number 18 produced on poles, and these can be salient poles where they are driven by windings of electrical wire. A shaded pole contains an inductance to delay the phase of the magnetic field for that pole. Nearly all electric motors are based somewhat magnetism. In these motors, magnetic fields are machinateed in both the rotor and the stator. The product between these two fields give start to a force, and a torque on the motor shaft. One, or both, of these fields must be made to change with the whirling of the motor. This is done by switching the poles on and off at the right time, or varying the strength of the pole. The conversion of electrical energy into mechanical energy by electromagnetic was demo by the British scientist Michael Faraday in 1821. A free-hanging wire was swayback into a pool of mercury, on which a permanent magnet was placed.
When a current was passed through the wire, the wire rotated around the magnet, showing that the current gave rise to a close poster magnetic field around the wire. This motor is often present in school physics classes, but salt body of water is sometimes used in place of the toxic mercury. This is the simplest form of a class of devices called homopolar motors. A later refinement is the Barlows whell. These were demonstration devices only, unsuited to practical applications due to their primitive construction.Electric motors applications are: industrial fans, blowers, pumps, machine tools, household appliances, power tools and disk drive.
Electric motors dont have a 100% efficiency. there are several factor:
* Iron losses
 result of magnetic energy dissipated when...If you want to get a replete(p) essay, order it on our website: Orderessay
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