摘要
传统的直接转矩控制采用六区间的圆形磁链控制,转矩脉动大,控制性能较差,而且考虑定子电阻压降的影响时,其区间选择存在缺陷。针对以上问题,文章提出了基于十二电压空间矢量的直接转矩控制策略,建立了永磁同步电动机的十二电压空间矢量直接转矩控制系统,制定了相应的开关原则,并采用滑模变结构控制策略设计速度调节器,取代传统的PI调节器,以增强系统的抗干扰和抗参数摄动的鲁棒性。仿真结果表明,该系统的定子磁链和转矩脉动较小,系统动、静态响应良好。
Traditional direct torque control adopts circle-flux control with six-section ana nas large torque ripple and bad control performance. When influence of voltage drop of stator resistance is considered, its section chosen has disadvantage. Aiming at above problems, the paper proposed direct torque control strategy based on twelve voltage space vectors. It established direct torque control system of twelve voltage space vector of permanent magnet synchronous motor, made corresponding on-off principle and adopted sliding mode variable structure to design speed regulator, which replaced traditional PI regulator in order to enhance robustness performance of anti-interference and resisting parameter distortion of the system. The simulation results showed that stator flux and torque ripple of the system are small and dynamic and static response of the system are good.
出处
《工矿自动化》
2009年第4期24-28,共5页
Journal Of Mine Automation
基金
国家自然科学基金资助项目(50677027)
辽宁工大校优秀青年科学研究基金资助项目(07A120)
关键词
永磁同步电动机
直接转矩控制
滑模控制
电压空间矢量
permanent magnet synchronous motor, direct torque control, sliding mode control, voltage space vector