Control method for hydraulic-electric hybrid drive friction supercapacitor mine hoist

Abstract

The invention discloses a hydro-electric combination drive friction type super capacitor mine hoist and a control method thereof, and belongs to the field of mine hoists. The hydro-electric combination drive friction type super capacitor mine hoist and the control method thereof are characterized in that a first cage conductor and a second cage conductor are connected with a hoisting rope respectively, and the hoisting rope is connected with a mine hoist winding drum; the mine hoist winding drum is connected with a hoist motor; the hoist motor is connected with a high-voltage inverter, a first hydraulic pump / motor, and a direct current bus of the high-voltage inverter; the first hydraulic pump / motor is connected with a hydraulic energy-storing loop; a direct current bus side voltage detecting circuit is connected with a bidirectional DC / DC converter; a super capacitor side voltage detecting circuit is connected with the bidirectional DC / DC converter; output of the direct current bus side voltage detecting circuit and the output of the super capacitor side voltage detecting circuit are connected with a controller; a revolution speed transducer is connected with the controller, and the controller is connected with a control site of the hydraulic energy-storing loop, the control site of the high-voltage inverter, and the control site of the bidirectional DC / DC converter. According to the hydro-electric combination drive friction type super capacitor mine hoist and the control method thereof, use ratio of electric energy is increased, and the service life of circuit components is prolonged.

Description

technical field [0001] The invention relates to a hydraulic-electric hybrid drive friction supercapacitor mine hoist and a control method, belonging to the field of mine hoist motor control, and in particular to a control scheme for recovering braking energy of the motor and reusing the energy. Background technique [0002] Mine hoist is a kind of large-scale hoisting machinery used in mines. It is composed of hoisting motor, reducer, main shaft device, brake device, electric control system, hydraulic system and operating table; the power part of the hoist is driven by a high-voltage motor. The wire rope is driven by the hoist drum to lift up and down in the shaft to complete the conveying task; the current mine hoist uses an electronic computer for automatic control, and has a large lifting capacity, fast speed, good controllability, and high safety. It has been widely used in the field of heavy mines; however, because the mine hoist needs to load heavy objects, it will con...

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Problems solved by technology

[0004] 1. The above grid feed problems will lead to grid instability, and the beneficiaries of electric energy are not users;

[0005] 2. There is a large throttling loss in the valve control system, which leads to the loss of stored energy during the control process;

[0006] 3. The cascaded high-voltage inverter used is huge in size, expensive in cost and not economical;

[0007] In the same year, another patent published in 2013 disclosed an energy-saving controller and control method for a motor speed regulation system based on supercapacitor energy storage. The patent number is CN103647500 A; this patent uses supercapacitors for energy storage and utilization. ; But this method is only applicable to the case of low-voltage motors, and the recovery of electric energy is small; in the case of high-voltage motors, a large amount of braking energy cannot be fully recovered, which may cause the bus voltage to be too high and burn out the circuit components

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