Control system used for variable-frequency-driving scraper conveyor

Abstract

The invention relates to a control system used for a variable-frequency-driving scraper conveyor, in particular to a scraper conveyor conveying system capable of carrying out variable frequency control by means of position signals of a coal mining machine and real-time coal transportation amount signals of the scraper conveyor. The control system can obtain operation frequency signals of an anti-explosion frequency converter in a designed programmed algorithm according to signals provided by a weighing sensor, a recognition sensor and a lower computer signal collection controller, and a controller of the anti-explosion frequency converter controls operation of an anti-explosion motor through the signals. By means of the control system, the problem that variable-frequency-driving scraper conveyor cannot adjust transportation capacity in real time according to load characteristics is solved, the scraper conveyor can adjust transportation capacity according to comprehensive operation conditions of a work face so that the variable-frequency-driving scraper conveyor can form a closed-loop variable frequency speed governing operation system. The automation degree of the comprehensive mechanized coal mining face can be improved and electricity consumed due to mining can be saved.

Description

technical field [0001] The invention relates to the technical field of coal seam mining in fully mechanized mining working faces in coal mines, in particular to a control system for frequency-variable-driven scraper conveyors. Background technique [0002] The scraper conveyor is one of the key equipment in coal mining, and it undertakes the task of coal transportation on the working face. The variable frequency drive type scraper conveyor is a new type of drive scraper conveyor that uses an explosion-proof high-voltage frequency converter to drive a three-phase AC motor to drive the scraper conveyor. The frequency conversion technology used in the existing underground working face is divided into: explosion-proof integrated frequency conversion motor technology (motor and frequency converter are integrated into one) and explosion-proof split frequency conversion technology (explosion-proof motor and explosion-proof frequency converter work as separate units). The fixed ope...

AI Technical Summary

Problems solved by technology

The frequency conversion technology used in the existing underground working face is divided into: explosion-proof integrated frequency conversion motor technology (motor and frequency converter are integrated into one) and explosion-proof split frequency conversion technology (explosion-proof motor and explosion-proof frequency converter work as separate units). The fixed operating frequency can be set manually, the volume and speed of the scraper conveyor cannot be detected, and the volume of the scraper conveyor cannot be adjusted according to the load on the working surface. The explosion-proof high-voltage frequency converter is only a part of the transmission part

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