The velocity in an electric motor of direct current is related to the electromotive force (f.e.m.) applied to the armature and to the counter-electromotive force (f.c.e.m.) generated in the armature by the magnetic field of the stator cutting the armature.
A f.m. Is the force resulting from the voltage applied to the armature being responsible for the current flowing through it. And being f.c.e.m., the force opposing f.e.m. Due to the induced voltage in the armature when it cuts off the magnetic field generated in the stator. In order for the DC motor general motor baldor to operate, both forces must be present.
As the speed of the motor depends on the voltage applied in the armature, the current in the coil and the value of the magnetic flux. Thus the engine speed tends to infinity when the flow tends to zero. Consequently, we must not take the field current in any way, as the motor “trips”.
Variable speed systems using DC motors and static converters combine large ranges of speed, robustness and precision to energy savings, which ensures optimum performance and flexibility in a variety of situations.