Electric motors consist of machines capable of transforming electrical-type energy into mechanical energy. The electric motor considered the most used in the industries is the induction, since it has been able to combine the numerous advantages of the use of electric energy, low cost, easy transportation and handling, effective performance, simplicity of command with simple and large projection Versatility of adaptations to the most different types of loads. The types of electric motors found considered to be the most common are electric motors of direct current and alternating current.
AC motors are the most used, taking into account that the distribution of electric energy is effected in alternating current. The main types of the same are the synchronous and induction motors. While DC motors are more expensive and need a direct current source, or a device that converts ordinary AC power to DC. They can operate at an adjustable speed with wide limits and flexible and precise controls. In this way, its use becomes restricted only to specific cases in which these requirements can compensate the high cost of the installation.