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Scraper conveyor heavy-load adaptive start control device and start control method

An adaptive controller and self-adaptive technology, applied in the direction of conveyor control device, control electromechanical transmission device, motor control, etc., can solve the problem of mechanical structure damage such as scraper chain, uneven motor output, unbalanced power distribution, etc. problems, to achieve the effect of optimizing the startup process, reducing broken links, and improving reliability and safety

Pending Publication Date: 2018-08-10
CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the technical problems existing in the prior art, and provides a control method for self-adaptive start-up of the scraper machine, which solves the unbalanced power distribution caused by setting the start-up time difference between the head and the tail in the prior art , resulting in uneven output of the motor, long-term damage to mechanical structures such as scraper chains, and a series of problems such as the empiricism of artificially adjusting the start-up time difference. The self-adaptive start-up control method of the scraper machine based on the difference between torque and start-up time ensures that the tension on the scraper chain is minimal during the start-up process, and the power of the head and tail motors is close to balance

Method used

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  • Scraper conveyor heavy-load adaptive start control device and start control method
  • Scraper conveyor heavy-load adaptive start control device and start control method
  • Scraper conveyor heavy-load adaptive start control device and start control method

Examples

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Embodiment 1

[0032] Embodiment 1: see figure 1 , image 3, a frequency converter control device for an adaptive starting controller of a scraper machine, the control device includes an adaptive controller 1, a speed controller 2, a digital switching switch 3, a vector controller 4, an inverter 5, and a motor 6. The adaptive controller 1 and the speed controller 2 are connected to the vector controller 4 through the digital switching switch 3, and the vector controller 4 is connected to the motor 6 through the inverter 5; the adaptive control The controller 1 is used to control the given torque of the vector controller 4. The speed controller 2 is used to adjust the speed feedback to track the speed given value. It receives the speed given and the speed feedback, and after the operation of the PI regulator, The output torque given value is given as the torque current given by the vector controller 4, and the digital switching switch 3 is used to select the torque and current given value of...

Embodiment 2

[0033] Example 2: see Figure 1-Figure 4 , a heavy-duty adaptive start-up control method for a scraper machine, comprising an adaptive start-up controller, the adaptive start-up controller including a torque observer, a speed observer and an adaptive rate controller, the torque observer Receive the torque feedback Ist_fdb output by the inverter vector control unit, and the flux linkage amplitude ψ s The real-time output torque Te_est is calculated by the torque formula, and the speed observer receives the output voltage and current Us, Is of the frequency conversion system, and through the MRAS sensorless speed estimator, calculates the real-time speed value ω_est of the motor, and the adaptive rate control By analyzing the real-time torque Te_est and real-time speed ω_est, combined with the starting strategy, the controller obtains the corresponding torque current given value Ist_ref, which is distributed to the vector control unit; the specific control steps are as follows: ...

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Abstract

The invention relates to a scraper conveyor heavy-load adaptive start control device, which comprises an adaptive start controller, a speed controller, a digital switching switch, a vector controller,an inverter and a motor. The adaptive start controller comprises a torque observer, a speed observer and an adaptive rate controller. The torque observer receives a torque current feedback Ist_fdb signal of the frequency converter vector controller and a flux amplitude psi s signal, and outputs a real-time estimation torque Te_est signal after operation; the speed observer receives voltage and current signals of the vector controller, and obtains a motor real-time speed valve omega_est signal through operation of an MRAS speed sensorless speed estimator; the adaptive rate controller analyzesthe real-time estimation torque Te_est signal and the real-time speed valve omega_est signal, and generates a corresponding torque current given value Ist_ref signal through operation; the vector controller receives a torque current given value Ist_ref signal command and generates a pulse PWM signal to drive a three-phase inverter module; and finally, the three-phase inverter module outputs an expected current and voltage to drive the motor to operate.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for self-adaptive start of a scraper machine, and belongs to the technical field of mining and transportation. Background technique [0002] The scraper conveyor is one of the key equipment in the modernized and mechanized fully mechanized mining face. The reliable operation of the scraper conveyor directly affects the production capacity of the coal mine. The transmission system of the scraper conveyor is a chain transmission system with less elasticity. There are unevenly distributed gaps between the gears of the transmission system, between the sprocket and the chain, and between the scraper chains. Torque, because the transmission system has not been tensioned, it will lead to serious mechanical stress, and in severe cases, it will cause faults such as broken chain, tooth punching, rolling keys and increased wear, which will seriously affect the life of the scraper machine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/50H02P21/13H02P21/22H02P27/08B65G43/00
CPCH02P5/50H02P21/13H02P21/22H02P27/08B65G43/00H02P2205/07H02P2205/05Y02P70/10
Inventor 谭国俊杨波王建平修远马亮郑旺
Owner CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
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