Mine winder or hoist drum electric motor control for preventing

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Analog armature control

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226 25, 388930, H02P 500

Patent

active

053772962

ABSTRACT:
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 includes 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. A motor control unit is responsive to signals from the sensors 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.

REFERENCES:
patent: 4084116 (1978-04-01), Arter et al.
patent: 4136302 (1979-01-01), Tlaker et al.
patent: 4232257 (1980-11-01), Harshberger
patent: 4347993 (1982-09-01), Leonard
patent: 4513898 (1985-04-01), Spitsbergen
patent: 4565334 (1986-01-01), Ruhl
patent: 4632325 (1986-12-01), Feyerl et al.

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