Abstract
In the recent decades there has been a tendency for simplifying gears construction, furthermore a lot of manufacturers design gearless electric drives for traction and power mechanisms. Rejection of mechanical transmission and replacing obsolete induction motor with energy-efficient permanent magnet synchronous machine (PMSM) allow to increase electric drive reliability, reduce repair and maintenance costs, also improve the technological process and industrial safety.This article is devoted to questions of permanent magnet synchronous motor control for underground belt conveyor gearless drum-motor. The model of PMSM with special construction was created by finite elements method in Infolytica MagNet and MotorSolve environments, simulation was provided with to regard due special nature of high-torque slow-moving power machines. The last section of article contains comparison of methods for high-torque slow-moving PMSM control and simulation results of vector control system.
Highlights
The underground belt conveyor is the main method of delivering coal ore in mine tunnel
A high-torque permanent magnet synchronous machine is located into body of drive gearless drum-motor, should produce required output power with mechanical torque and fit to desired dimensions of drum-motor body
High-torque slow-moving permanent magnet synchronous machine has a rotor with radial surface magnets and pole tips to provide uniform distribution of magnetic flux in the air gap and protect permanent magnets from demagnetization [7,8,9]
Summary
The underground belt conveyor is the main method of delivering coal ore in mine tunnel. In traditional non-regular induction electric drives constantly causes start-up and loadrejection overvoltages, high start-up currents and pulsating torque lead to additional tension and slippage of belt. Mechanical transmission limits rotation power and reduces the efficiency of electric drive, and has considerable dimensions. Foreign researchers commonly refuse to use traditional induction machines in design of high-power electric drives, by reason of inconsistency with new energy efficiency standards of IE. There is a tendency of replacing common power-drive station of belt conveyors with more producible drum-motors and introducing gearless electric drives with direct transmission of torque to shaft of controlled component. Developing of high-torque slow-moving PMSM system control for gearless drum-motor needs to decide questions: 1. Design high-torque slow-moving PMSM model using dimensions and parameters data of electric drive of actual underground belt conveyor.
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