A control system for maintaining the traction of a rolling stock vehicle.

摘要

From a peripheral velocity vM of a driving wheel and a vehicle velocity v, the changing rate DELTA vs/ DELTA t of the relative velocity vs therebetween with respect to time is obtained. The changing rate DELTA f/ DELTA t of the traction force f produced in the driving wheel at that time is obtained from a detected armature current of a motor driving the driving wheel. A driving torque produced by the motor is so controlled as to decrease when polarities of the changing rate in the relative velocity and that in the traction force are different from each other.