Monday, 12 November 2012



How electric motor translates electric to mechanical?

Changign electric energy into torque energy requires the use of an electic motor. Electric energy is divide from the flow of electrons. An electric motor converts the flow of electrons using electromagnets rotate an axle. The axle then genertates torque on whatever is hooked to its open end. This entails hooking the electric motor to your power supply, be it a battery or power plug. So long as electricity flows, the current will be converted to torque.
An electric motor is used to convert electical energy into mechanical one, electric motors run by electromagnetism.
There are 3 basic elements which are interacting to produce motion:
1-    Mangntic flux (the motor housing generate magnetic field, due to the permanent magnets content)
2-    Current (when electricity is applied across the motor terminals, current flows through from one end of the terminal to the brush, commutator then to the windings, back to the commutator and brush and out through the other terminal.)
3-    Force (electromagnetic force which causes rotation of the shaft is produced by the current which flows through amgnetic field. Switching of current producing the rotating force which is called torque).
A basic electric motor has an electrical input of voltage and current. It has a mecjanical output in the form of torque and roation. The motor loses somne energy in the form of heat. An electric motor consists of two main parts, a stator, which is the outer frame and dose not turn, and a rotor, the inner part of the motor that can turn.
The rotor is connected to a shaft, which connects the machine to its mechanical load, for example the fan that turns when you switch the machine on. It is a long piece of metal that sticks out from the rotor and it turns when the rotor turns. Dpending on the type of machine, either the stator or the rotor ( or both) contain current- carrying conductors wound inot coil. These coil are called windings. There are slots cut inot the stator and the rotor to contain the windings and their insulation. There is an air gap betwwen the stator and the rotor so that they do not rub against each other. A direct current (DC) motor needs a supply of direct current to work and an alternating current ( AC) motor needs a supply of alternating current to work.

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