PWM逆变器供电异步电机传动的去耦直接控制  

Decoupled Direct Control PWM Inverter-Fed Induction Motor Drives

作　　者：C.E.Moucary 彭凤元 

机构地区：[1]黎巴嫩

出　　处：《变流技术与电力牵引》2003年第5期7-11,33,共6页Converter Technology & Electric Traction

摘　　要：提出一种用于脉宽调制(PWM)逆变器供电异步电机的转矩和定子磁通直接控制方法。这种被称为去耦直接控制(DDC)的基础是一个去耦矩阵,它允许对定子磁通和转矩单独控制。将该方法和著名的直接磁场定向控制(FOC)和定子磁通矢量控制(SFVC)进行比较。提出了2种基于DDC的方案。第一种是确定定子电压矢量,以便转矩和磁通跟踪其各自在一个采样周期内的基准轨迹。第二种是利用PI控制器分别控制转矩和定子磁通误差的动态特性。与FOC和SFVC相似,这些方法均考虑到了整个电机动态特性范围内不需要坐标变换,并可大幅度地降低计算工作量。这2处控制方案已经完成试验,并且与FOC和SFVC进行了比较。试验结果表明,所提出的PI-DDC控制非常有效。A new direct torque and stator flux control method is presented for pulsewidth modulation (PWM) inverter-fed inductionmotors. This new strategy,called decoupled direct control(DDC), is based on a decoupling matrix that allows for the separate control of thestator flux and the torque. This method is compared to the well-known direct field-oriented control(FOC) and stator flux vector control(SFVC) methods.Two DDC-based methods are presented. The first determines the stator voltage vector so that the torque and the flux tracktheir respective reference trajectories in one sampling time. The second sets separately the dynamic behavior of the torque and stator fluxerrors by the use of proportional-plus integral (PI)-type controllers. These methods take into account the full motor dynamics without theneed of a coordinate transformation and reduce significantly computation requirements compared to FOC and SFVC. The obtained resultsshow the effectiveness of the proposed PI-DDC strategy.

关 键 词：去耦直接控制 直接转矩和磁通控制 磁通定向控制 异步电机驱动 定子磁通矢量控制 

分 类 号：TM343[电气工程—电机]