Electric motors of direct current (DC) have significant importance in the development of servomechanisms and, for that reason, its study, both with respect to the development of models and the identification of its parameters, deserves considerable attention.
Depending on the application, drives in DC motors are usually the ones with the greatest benefits, also in terms of reliability, user-friendly operation and dynamic control. On the other hand, this type of drive has some disadvantages, such as high cost, greater need for maintenance and special measures to carry out the game.
The operating principle of electric motors is based on the forces of electromagnetic origin that results from the interaction of the magnetic fields produced by two types of windings (which are the coils). One winding remains static in the motor stator and the other is the rotating part (rotor) that rotates next to the motor shaft.
DC electric motors have a high cost of production and, in addition, for the distribution of electric energy to occur, it is necessary to have a source of direct current, or rather a device that converts alternating current to continuous.