矩阵变换器多电压矢量及在交流调速中的应用  

Multiple Voltage Vectors of Matrix Converter and Its Applications in the AC Motor Speed Regulating System

作　　者：张深基[1] 梁炳寅[2] 朱建林[2] 

机构地区：[1]湖南工程学院电气与信息工程系,湖南湘潭411102 [2]湘潭大学信息工程学院,湖南湘潭411105

出　　处：《电气传动》2008年第6期16-19,55,共5页Electric Drive

摘　　要：在电动机直接转矩控制(DTC)系统中普遍存在低速运转时的转矩脉动,而在矩阵变换器(MC)供电的DTC系统中,可根据MC的大小输入电压来合成长、短、零3种输出电压矢量,合理应用短零矢量而减少长电压矢量的使用,可有效地抑制转矩脉动。提出了一种5电平输出的滞环比较器,根据其输出确定转矩误差大小,选取不同的电压矢量。仿真结果表明,该方法能够有效地减小低速时的转矩脉动,增强系统的鲁棒性,使低速性能得到较大的提高。The torque ripple exists universally in motor direct torque control （DTC） system at low-speed. The DTC system supplied by matrix converter （MC） can synthesizes long, short and zero three kinds of output voltage vectors according to MC input voltage value. The reasonably usage of short and zero vectors can decrease the use of voltage vectors and restrain the torque ripple efficiently. A type hysteresis comparator with five-level output was proposed, in the basis of which to determine the torque error and then select various voltage vectors. The simulation results indicate that this method can reduce torque ripple at low-speed, enhance the system robustness, and improve the low-speed performances largely.

关 键 词：矩阵式变换器 交流调速 直接转矩控制 多电压矢量 空间矢量调制 

分 类 号：TM77[电气工程—电力系统及自动化]