It is worth remembering that several aligned turns can be used in a suitable formation, in this way, the magnetic dipole moments will be added, which can result in a high intensity torque. The use of numerous coils have the same purpose. On the underside, connected to two symmetrically opposed metal parts, a field coil will have the function of generating the field in which the rotor coils will be immersed. The metallic parts are ferromagnetic and establish the proper configuration of the magnetic field, presenting in the horizontal position in the same region, in which the rotor coils are. Together, the shaft and the three coils make up the rotor.
Also visible are both the commutator, collector and brushes, as well as the terminals, intended for the connection of the device to an external electric source. Basically, the torques are generated in the rotor coils in order to make it rotate. In the case, for example, of a practical application of the resulting torque on a coil in a DC motor, mounted on the shaft in suitable supports, it will have three coils responsible for the turning process, oriented perpendicular to the respective face visible from the cradle.
The switching components are normally used to activate and deactivate the motor in a safe manner, that is, without any contact of the operator in the power circuit in which the greater current flows. It should be emphasized that in the analysis of electrical controls it is extremely necessary to make sure that they have the proper sequence, which will serve as the basic orientation for the design of any circuit. One of the points considered fundamental to the understanding of electrical commands is the understanding that the main functions of the elements when it comes to an electrical panel are to protect and preserve the operator and to provide a command logic.
Based on the principle of operator protection, a generic sequence of the essential elements at the start and also the engine maneuvers. In these maneuvers can be highlighted the following elements, the sectioning, that can be operated only without load. It is used during the circuit maintenance and verification process. The protection against short-circuit currents is intended to protect the terminal circuit conductors and the protection against overcurrent currents acts in order to protect the winding coils of the motor.