Numerically-controlled frequency-variable speed-adjustable system of mine hoist

The utility model discloses a numerically-controlled frequency-variation speed-regulation system of a mine hoist, which belongs to frequency-variation speed-regulation devices and aims to provide a mine hoisting speed-regulation system with the advantages of smooth speed regulation, small impulsive vibration and high security and reliability. The system comprises a drum, a speed reducer connected with the drum, a motor driving the speed reducer, and a control device electrically connected with the motor, wherein, the control device comprises a PLC (Programmable Logic Controller) (1) provided with a touch display screen (9), a frequency converter (7) connected between the PLC and the motor (5), a motor encoder (6) arranged on the motor (5) and electrically connected with the frequency converter, and a drum encoder (2) arranged on the drum (3) and electrically connected with the PLC (1). The utility model has the advantages of fast regulation, accurate positioning, good security and reliability, has the functions of digitally displaying depth and speed, displaying analog speed and analog depth, and displaying given speed and practical speed curve, and is classified as an ideal speed-regulation system for the mine hoist.