Rectifier-powered motor with dynamic braking
An equipment excited by rectifiers comprising at least one dc motor having an armature and a primary field winding in series; a single-phase power circuit; transformer means energized from said single-phase power supply circuit and with a plurality of voltage change sockets for controlling the secondary voltage of the transformer means; a rectifier assembly for said motor comprising said rectifying assembly comprising at least a pair of single-phase rectifying devices; multi-step accelerator means for exciting the motor armature from the transformer means in series with the rectifier assembly and the main field winding in series during the traction operation including said accelerating means, tap change means for varying the secondary voltage of the the transforming means; and braking connection control means for substantially disconnecting the motor armature from its connection between the rectifier assembly and the transformer means and for connecting a braking resistor load across the motor armature and for driving the main field winding in series from the transformer means in series with the rectifier assembly during the dynamic braking using said means of control of the braking connection a tap distribution connection that provides a secondary low voltage of the transformer means. (Machine-translation by Google Translate, not legally binding)