An energy-saving control device for permanent magnet variable frequency drive scraper conveyor

Abstract

The invention discloses an energy-saving control device for a permanent-magnet variable-frequency drive scraper conveyor, which belongs to the field of energy-saving control of heavy machinery for conveying coal under mines. Energy-saving controls that maintain power matching at various speed trends. The device consists of a coal flow state detection and feedback module, a master-slave drive power matching control module, a permanent magnet frequency conversion integrated machine and a scraper conveyor. The biggest advantage lies in the multi-point collection and feedback of the coal flow state information from the motor and the conveying scraper by using a variety of sensors. Based on this, through the control module that integrates the three-loop vector drive of current, speed and magnetic flux, the mine online The coal flow detection is matched with the real-time power of the master-slave drive under the mine to achieve the purpose of saving energy and reducing consumption.

Description

technical field [0001] The invention belongs to the technical field of coal mine electrical equipment, and in particular relates to an energy-saving control device for a permanent magnet variable frequency drive scraper conveyor. Background technique [0002] At present, most of the driving methods commonly used for scraper conveyors under mines in my country are two-speed motors and CST controllable starting devices. The driving mode of the two-speed motor is usually connected to the chain of the scraper conveyor through the reducer by the two-speed motor. The motor is equipped with two sets of windings, which are low-speed windings and high-speed windings. When the motor is energized and started, the low-speed winding is used, and the scraper conveyor chain speeds up accordingly. When the operation reaches a stable state, it is switched to the high-speed winding and energized. Under the action of inertia, the motor and the scraper conveyor continue to speed up at the curre...

AI Technical Summary

Problems solved by technology

[0005] The present invention is an energy-saving control device for a permanent magnet variable frequency drive scraper conveyor, which aims to solve the problem of unmatched operation of the motor power at the head and tail of the existing scraper conveyor due to continuous and irregular changes in the load of the coal flow when the existing scraper conveyor is working. Disadvantages of large power loss

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