基于双电阻的变频控制器交流电流采样方法研究  

Research of Sampling AC Current with Double Resistance based on Variable Frequency Controller

作　　者：费继友[1] 梁晟铭 李花[1] 李彥阳 牟颖 

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2017年第6期103-106,共4页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(51376028);国家科技支撑计划资助项目(2015BAF20B02)

摘　　要：为解决双电阻直流电流采样在变频控制器高频状态下存在的采样盲区问题,对双电阻交流电流采样方法进行研究,论证其采样后的交流电值可以通过滑模观测器的运算,达到控制电机输出转矩的目的.仿真结果表明:这种双电阻交流电流采样方法避免了电流采样在高频区域中出现的盲区问题,提高了采样电流的精确度,使系统的输出转矩更加平稳,转矩波动范围更小.In order to solve the problem of sampling blind area in high frequency state of the variable frequency controller,the sampling method of AC current with double resistance is studied,proving the AC value can be calculated by sliding mode observer. Simulation results show that the method of double resistance alternating current sampling avoids the problem of blind area of current sampling in high frequency region and improve the accuracy of sampling current. The output torque of the system is more stable and the torque fluctuation range is smaller.

关 键 词：变频控制 高频状态 双电阻直流电流采样 采样盲区 双电阻交流电流采样 

分 类 号：TM921.51[电气工程—电力电子与电力传动]