模糊控制在异步电机直接转矩控制系统中的应用  

Fuzzy Direct Torque Control of Induction Motor

作　　者：周博[1] 邓福军[1] 

机构地区：[1]大连交通大学

出　　处：《变频器世界》2011年第4期63-66,共4页The World of Inverters

摘　　要：为提高异步电机直接转矩控制系统的低速性能,本文中提出了一种模糊控制和PI闭环校正磁链观测器相结合的控制方法。该方法采用PI闭环校正磁链观测器代替传统U-I模型,给磁链和转矩误差分级,用模糊控制代替传统滞环控制选择合适的电压矢量.为减少模糊控制规则和加快模糊推理,定义了定子磁链角映射。仿真结果表明,此方法能够提高磁链的观测精度,并能得到比传统直接转矩控制系统更好的低速动态性能,证明该方法的有效性。To improve the low-speed performance of direct torque control （DTC） of induce motor, this paper introduce a method which is combines fuzzy control with PI close-loop flux observer. This method used PI close-loop flux observer replaced the conventional U- I model, divide flux error and torque error into different intervals and give different control voltages which generate by fuzzy controller instead of traditional hysteresis con- troller for each of them. A stator flux angle mapping technique has been proposed to reduce the size of the rule base to a great extent so that the fuzzy reasoning speed increases. The simulation results show the effectiveness of the new control strategy, more accurate observe on flux was achieved and obtain a better low-speed dynamic performance.

关 键 词：直接转矩 模糊控制 PI闭环校正磁链观测器 低速性能 

分 类 号：TM343[电气工程—电机]