Controlled stop function for locomotives

摘要

A controlled stop system for an AC electric locomotive includes a braking effort control circuit responsive to a braking command regulating braking effort produced by AC traction motors coupled in driving relationship to wheels of the locomotive. The control circuit is responsive to a vehicle speed signal for adjusting motor operation to maintain braking effort to about zero speed. A filter processes the speed signal before application to the braking effort control circuit such that the control circuit operates as a speed regulator at zero speed to maintain the vehicle in a stopped condition.