ROTATION IN THE DC MOTOR
Figure 12 shows a first practical way to implement a DC motor.
The input DC power is applied to the switch through the brush named as + (positive) and - (negative). The current flow passes the loop (called "armor"), which experience forces on the segments AB and CD, causing the shift in the direction indicated.
Figure 12
The figure above shows the armor consists of only one turn, which is not true, since for practical applications such a loop should be mounted on a magnetic core as shown in Figure 13. Due to the passage of current through the armature and the influence of the field induces a force F, which produces a torque (force times distance) that causes the rotational movement of the rotor.
Figure 13
Various types of DC motor, but the engine used industrial application level is the one called "motor separately excited DC shunt." Figure 14 shows this type of engine.
Figure 14
We note that:
a) The armor consists of a set of coils wound on a core conveniently magnetic metal laminate, which is mounted and connected to pressure on a steel rod called axis. This shaft has at its ends a pair of wheels that allow the movement of rotation and are mounted on the stator fixed tapas.
b) The field is an electromagnet consisting of a set of coils wound on a laminated core of magnetic metal. These cores are mounted inside the stator.
