基于双模糊空间矢量调制的直接转矩控制  

Direct Torque Control Based on Double-fuzzy Space Vector Modulate

作　　者：蔡斌军[1] 

机构地区：[1]湖南工程学院应用技术学院,湖南湘潭411101

出　　处：《控制工程》2010年第3期328-331,362,共5页Control Engineering of China

基　　金：湖南省教育厅科研基金资助项目(09C261)

摘　　要：为了改善基于空间矢量调制的直接转矩系统的动态性能及低速性,分析了传统SVM-DTC中采用两个PI控制器来产生参考电压矢量,存在PI控制器参数难以确定的问题,提出了一种基于双模糊空间矢量调制(SVM)的异步电机直接转矩控制(DTC)策略。阐述了产生磁链和转矩参考电压矢量的模糊控制器的具体的设计过程,即模糊控制器的输入变量分别为磁链、转矩误差和磁链、转矩误差的变化率,输出为参考电压矢量的磁链、转矩分量。对该控制方法在基于Simulink的仿真软件和基于DSP2812的控制芯片的实验装置分别进行了仿真与实验,并与传统的SVM-DTC进行了比较。仿真和实验结果表明,双模糊SVM-DTC控制系统动态性能好,有效提高了系统的低速性能。To improve the dynamic and system low-speed performance,the problem that the parameters are difficult to determine for the two PI controllers used in conventional SVM-DTC to generate reference voltage vector is analyzed.A DTC strategy of induction motors based on double-fuzzy SVM is proposed.The flux and torque fuzzy controller is designed to substitute the original flux and torque controller.The proposed controller has two inputs,flux/torque error and its change rate,and one output,the flux/torque component of reference voltage vector.Simulations are carried out to verify the proposed strategy,and compared with conventional SVM-DTC,based on the simulink and DSP2812.The simulation and experiment results show that the double-fuzzy SVM-DTC is capable of effectively improve the control performance,especially improve the low-speed performance.

关 键 词：异步电机 直接转矩控制 空间矢量调制 模糊控制 低速性 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]