变频技术在带式输送机远距离运输中的应用

Application of frequency-conversion technology in long-distance transportation of belt conveyor

针对某矿带式输送机控制系统采用工频拖动和液力偶合器传动,存在着传动效率低、启动电流冲击及机械冲击大、电动机功率不平衡等问题,提出了一种采用变频控制技术的改造方案。该方案运用变频器的软启动功能,将电动机的软启动和带式输送机的软启动合二为一,通过电动机的慢速启动带动输送机启动,使重载启动时输送机启动平滑,转矩大,没有冲击电流。实际应用结果验证了该方案的有效性。

In view of problems of low efficiency,big impact of start-up current and mechanical shock,being unable to balance power because of using power frequency and fluid coupling to drive belt conveyor control system in a Coal Mine,a reform scheme adopted frequency-conversion control technology was proposed.The scheme uses soft start function of frequency converter to integrate soft-start of motor and belt conveyors,adopts slow start of motor to drive conveyors start,so make conveyors have smooth start,big torque,no inrush current under heavy load starting.The practical application validates effectiveness of the scheme.