转矩预测在三电平直接转矩控制中的仿真研究  

Simulation Study of Three-level DTC Based on Torque Predictive Control

作　　者：陈杰[1] 陈金德 

机构地区：[1]西安理工大学自动化与信息工程学院电气系,陕西西安710048 [2]博世力士乐电子传动与控制(深圳)有限公司,广东深圳518053

出　　处：《电气传动》2009年第9期37-40,共4页Electric Drive

摘　　要：在基于磁链幅值和相位补偿的定子磁链观测器的基础上,针对合成矢量三电平逆变器直接转矩控制中,在一个周期内工作矢量的不连续造成了转矩较大脉动的缺点,提出了一种预前控制的方法。该方法根据前一个周期采样的磁链和转矩误差,来确定下一开关周期所应施加在逆变器上的参考电压矢量,然后利用空间矢量脉宽调制(SVPWM)的方法,合成此开关电压矢量。这样在保证开关频率一定的情况下,大大减少了转矩脉动。仿真结果表明,该方法可以成功减少转矩脉动,磁链轨迹近似为圆,而且电流波形正弦性良好。In stator flux linkage estimator based on the flux amplitude and phase compensation, traditional direct torque control scheme of three-level inverter based on synthesizing voltage vectors, a new predictive control method was proposed to reduce the large torque ripple caused by discontinuity of the voltage vectors in a work period. Reference voltage space vector which will be added to the inverter next period can be determined by calculating the errors of the flux and torque by the last sample period. Vector is then synthesized by a space vector pulse width modulation （SVPWM） algorithm to keep a constant switch frequency. The simulation shows that the control method can lessen the torque ripple and maintain the waveform of stator flux nearly round and the sine character of current is nicer.

关 键 词：预前控制 合成矢量 直接转矩控制 空间矢量脉宽调制 转矩脉动 

分 类 号：TM343[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]