无刷双馈电机直接转矩控制失控分析  

DTC OUT OF CONTROL ANALYSIS AND IMPROVED FOR BRUSHLESS DOUBLY-FED MACHINE

作　　者：夏超英[1] 霍克强[1] 侯晓鑫[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《太阳能学报》2017年第7期1838-1846,共9页Acta Energiae Solaris Sinica

基　　金：国家高技术研究发展(863)计划(2011AA11A259)

摘　　要：根据无刷双馈电机统一坐标系下的数学模型,推导电磁转矩和控制绕组磁链的导数方程,由导数方程得到在不忽略转子磁链条件下的磁链和转矩关于基本电压矢量的曲线图,作为直接转矩控制开关表选择的依据。根据曲线图分析无刷双馈电机在高转矩条件下的失控问题,并从转矩、控制绕组磁链及直流母线电压大小变化对于失控问题存在的影响进行理论分析及仿真验证,提出动态调节电压矢量的方法给以解决,改善系统的控制性能,仿真结果证明所提方法的有效性。This paper deduced derivative equations of the control machine flux and the electromagnetic torque, based on the mathematic model of the cascade brushless doubly-fed machine in the CW reference frame. Furthermore, the curve of flux and torque verse the voltage vector look-up table is also obtained, according to which we can choose the switch table in DTC. The out of control condition is analyzed based on the curves and a routine to this problem is proposed that is regulating voltage vector dynamically. By this way, the performance is improved. Simulation results validate the effectiveness of the proposed control algorithms.

关 键 词：无刷双馈电机(BDFM) 直接转矩控制(DTC) 失控问题 曲线图 

分 类 号：TM301[电气工程—电机]