Abstract

Regarding the current tendency of replacing the geared electric drives with gearless drum motor and substitution of the obsolete induction motors with energy-efficient synchronous motors, the authors consider the difficulties of the high-power permanent magnet synchronous motor and present its model with parameters corresponding to the real belt conveyor electric drive parameters. This paper describes the questions of the vector control system simulation for the synchronous gearless drum-motor of an underground belt conveyor. The control of permanent magnet synchronous motor is realized having regard to rotor angle and random traffic flow. The mechanical system of an underground belt conveyor is represented by the multimass system with the viscoelastic bar. As a conclusion, the article presents the results of the direct torque control system simulation in the speed adjustment mode.

Highlights

  • The belt conveyors are the most common type of conveyor transport and the most effective method to deliver the coil ore through the mine face

  • The induction motor drives mostly are non-controllable, in some cases, the speed control is realized by an operator within two or three control steps

  • In induction motor drives constantly causes start-up and load-rejection overvoltages, the high start-up currents and pulsating torque that lead to additional tension and slippage of a belt

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Summary

Introduction

The belt conveyors are the most common type of conveyor transport and the most effective method to deliver the coil ore through the mine face. The most commonly used type of single-drum electric drive consists of one or two induction motors, a hydraulic clutch, the massive gear, and brake systems. This type of drive contains a lot of elements and takes up much space in narrow mine tunnels. In induction motor drives constantly causes start-up and load-rejection overvoltages, the high start-up currents and pulsating torque that lead to additional tension and slippage of a belt. This mechanical system limits rotation power and reduces efficiency, and has considerable dimensions. The speed control must be realized having regard to the PMSM rotor angle θ and the traffic flow

The Modeling of High-Torque PMSM
The Mechanical System of the Belt Conveyor
The Design of System Control for the Gearless Drum-Motor
Conclusion
INFOMINE Research Group Conveyor Belts in the CIS

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