Around the year 1820, the Danish scientist Hans Christian Oersted could not foresee that by simple experiment could discover a fundamental physical principle for the operation of this type of motor. The scholar passed an electric current, produced by alemite 597 b a normal heap, by a conductor wire, and shortly afterwards, he drew a compass close to the wire. The needle, which acts as a magnetic bar, moved and aligned itself to the wire perpendicularly. For the scientist, the fact confirmed that in the surroundings of the wire existed a magnetic field, that acted on the field of the needle.
It is worth stressing that different electrical components are used every day in the homes and work environment of the entire population. In addition to the appliances considered indispensable, it is extremely important to highlight the importance of other electrical devices, such as elevators, electronic gates of the garages and escalators, for example. In industries, in the past, the evolution of the electric machine was no different. In order to design all these engines, several other components had to be manufactured. Even though large and distinct in appearance, such as a blender, most of them make use of the same basic operating system, which is that of an electric motor, whose main purpose is to transform electrical energy into mechanical.