CONTROL SYSTEM FOR A MINE WINDER

摘要

The invention provides a control system for an electric motor arranged to drive a rope drum of a mine winder or a hoist system which includes a conveyance supported by a rope and which forms an oscillating system. The control system comprises a load sensor which monitors the load in the rope and a rope length sensor which monitors the length of rope paid out from the rope drum. The motor control unit is responsive to signals from the sensor and calculates setpoints for speed, acceleration and jerk of the oscillating system. The control unit generates a control signal which is related to a natural oscillation mode of the oscillating system so as to prevent the excitation of oscillations in the system, and controls a motor drive in accordance with the control signal.