Electric motors are devices or machines that convert electrical energy to mechanical energy through the interaction between magnetic fields and electricity from a shaft within the motor itself. It has been considered as an innovation in the field of energy and because of it, life has become as advanced as it is nowadays.
Motors in general can be either self-powered or through other external sources. Self-powered electric motors such as motor vehicles and batteries where the energy is generated within, on the other hand the external source current electric motors are dependent on alternative sources such as electrical generators; where the generator is dependent on a motion of another device in order to create energy.
The electric motor amongst other types of motors is considered to be cost efficient. It has a longer lifespan because it has few parts in motion therefore less maintenance service is required.
Motors are classified according to the use or the general purposes and can be modified but the concept remains that the energy is transformed from electrical to mechanical energy and mostly used for industrial use like in industrial fans, electric cars, blowers and pumps, machine tools, household appliances, power tools, elevators and disk drives.