异步电动机直接转矩模糊控制系统低速性能研究  

Study of Low Speed Performance of Asynchronous Motor Direct Torque Fuzzy Control System

作　　者：蔡斌军[1] 刘国荣[2] 

机构地区：[1]湘潭大学,湖南湘潭411105 [2]湖南工程学院,湖南湘潭411101

出　　处：《微特电机》2006年第9期18-21,共4页Small & Special Electrical Machines

摘　　要：提出了一种模糊控制和低通滤波器补偿相结合的控制方法。这种方法采用低通滤波器代替积分环节的基础上,根据定子磁链的实际值与给定值之间的关系,推导出磁链的补偿公式,然后通过模糊控制进行开关状态选择,从而控制逆变器的输出。仿真和实验结果表明,该方法能够提高磁链的观测精度,增强系统的鲁棒性,并能使直接转矩控制系统的低速性能得到较大的提高。A novel method which combines fuzzy control with low - pass filter compensation was proposed. According to relationship between real and estimated values of the stator flux linkage, the compensatory formulas of the estimated flux linkage and its principle block diagram were presented. By fuzzy controller select the switch station. Use this method control converter＇s output. The simulation and experiment results showed that this method gives satisfied estimation of stator flux and improve direct torque control system good robust. The performance of lowspeed have been improved in direct torque control system, confirming the validity of the method.

关 键 词：直接转矩 模糊控制 低通滤波补偿 低速性能 

分 类 号：TM343[电气工程—电机]