摘要
针对传统的直接转矩控制(DTC)转矩脉动大、开关频率不固定及低速性能差等问题,提出了一种基于模糊空间矢量调制(SVM)技术的新型直接转矩控制系统,并利用Matlab软件建立了系统仿真模型。在SVM-DTC系统中使用了两个模糊控制器,可以得到能够准确补偿定子磁链与转矩误差的参考电压矢量,通过SVM技术将参考电压信号转换为PWM开关信号。仿真结果表明,模糊SVM-DTC可有效提高系统的控制性能,尤其是低速性能。
To solve the problem of large torque ripple, inconstant inverter switching frequency and weak low-speed performance in the conventional direct torque control,a novel DTC method using fuzzy space vector pulse width modulation was proposed and modeled in the Matlab. The reference voltage vector that could compensate current flux and torque error was generated with two fuzzy controllers. Afterward, the reference voltage vector could be converted into corresponding PWM signals with SVM technique. The simulation verifies that the fuzzy SVM-DTC can effectively improve the control perform- ance, especially the low-speed performance.
出处
《微特电机》
北大核心
2010年第10期48-50,共3页
Small & Special Electrical Machines
基金
湖南省教育厅科研项目(09C261)
