Table of content:-

1)Electrical braking control for DC motors

2)Description

3)BACKGROUND OF THE INVENTION

Electrical braking control for DC motors:-

An electrical braking control circuit for use in a control system for a direct current traction motor which may be employed, for example, to propel an electrically driven vehicle. The electrical braking controller of the invention initiates electrical braking in a plug mode of braking and then, when conditions are suitable for regenerative braking, causes a transition to regenerative braking, followed by return to a plug mode of braking whenever regenerative braking can no longer be efficiently achieved, all of which is carried out smoothly and efficiently without unduly wasting regenerative power.

1). In a control system for a direct current traction motor having series connected field and armature windings, the control system being of the type including a regulator whose ratio of conduction to non-conduction periods determines the motor power, means for initiating electrical braking by reversing the polarity of current to the field winding, a current path for current generated in a plug braking mode of operation, a current path for current generated in a regenerative braking mode of operation, and a set of contacts whose operational state is opened or closed depending on the braking mode, an electrical braking control circuit, comprising:

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