直接转矩控制系统磁链区间细分控制的应用  

Application of Flux Section Subdividing Control in DTC

作　　者：黄祯祥[1] 郭延文[1] 廖剑霞[1] 邓怀雄[1] 周书[1] 

机构地区：[1]湘潭大学职业技术学院,湘潭411100

出　　处：《电力系统及其自动化学报》2008年第1期61-65,共5页Proceedings of the CSU-EPSA

基　　金：湖南省教育厅资助科研项目(07C762)

摘　　要：针对传统异步电动机直接转矩控制系统中电压空间矢量对定子磁链幅值和磁通角的不同影响,指出了传统开关控制表在定子磁链幅值和磁通角变化相矛盾时所存在的缺陷。在6区间圆形磁链控制的基础上,提出了12磁链区间细分控制的控制策略及其实现方法。该方法充分利用了8个电压空间矢量,有效地避免了定子磁链幅值和磁通角变化相矛盾时对系统转速与转矩的不利影响。仿真结果表明该控制方案是可行的,能使系统起动响应速度加快,并具有良好的转速与转矩控制性能,提高了系统的稳定性与对定子磁链相位角的鲁棒性。Considering the influence of voltage space vector in direct torque control for induction motor, the disadvanta magnitude of stator flux and the flux angle change opposite section flux linkage control, a new control strategy called ＂t on the magnitude of stator flux and the flux angle ges of the conventional switching table, when the ly, are presented in this paper. Based on the six- twelve-section flux subdividing control is studied. The negative effect on rotor speed and torque is avoided effectively when the magnitude of stator flux and the flux angle change oppositely, and the eight voltage space vectors are fully used at the same time. Simulation results show that the response speed is fast enough when the system starts up, the control performance of rotor speed and torque is well, and the stability and robustness of the system are enhanced, all of which prove that the proposed control scheme is feasible.

关 键 词：直接转矩控制 磁链区间控制 电压空间矢量 

分 类 号：TM343[电气工程—电机]