电牵引采煤机变频调速控制方式的对比研究

Comparison research of control mode of frequency-conversion speed-regulation of electrical traction shearer

在分析变频器控制方式原理的基础上,利用Drivewizard软件搭建试验平台,实时监测变频器输出电流、频率及电动机转矩、转速等,用以比较V/f控制方式与VC控制方式的调速性能,得出了2种控制方式下具体的功能指标。试验结果表明,基于VC控制方式的变频调速系统可显著提升低频区间采煤机的负载能力。

On basis of analysis of principle of control mode of frequency converter,experiment platform of control mode was established by use of Drivewizard to monitor output current and frequency of the frequency converter,torque and speed of motor,so as to compare speed-regulation performance of V/f mode and VC mode,and to get specific function index of the two control modes.The test results show that frequency-conversion speed-regulation system based on VC mode can significantly improve load capacity of the shearer in low frequency range.