Drive and brake circuit for speed controlled DC motors - has diodes or rectifiers connecting armature across line of braking resistor

摘要

In the system which controls the speed of a DC motor, the motor is driven by connecting the motor field winding and a series rectifier across the motor armature. A braking force is applied by connecting the armature across a braking resistor and the series rectifier. Regenerative braking is accomplished by connecting the armature across the line when the line voltage is low. Non-regenerative braking is accomplished through a series resistor when the line voltage is high. Suitable diodes or control rectifiers connect the armature across the line or the braking resistor.