磁链区间细分控制在DTC系统中的应用

The Application of Flux Linkage Section Subdivide Control in DTC

针对直接转矩控制系统中电压矢量对定子磁链幅值和磁通角的影响,指出了传统开关控制表所存在的缺陷。在传统直接转矩控制的基础上,分析了磁链区间细分控制的控制策略及其实现方法,该方法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。

For the infection of voltage space vector on the magnitude of the stator flux and the flux angle in direct torque control （DTC）, the disadvantages of the conventional switching table were presented. Based on the traditional direct torque control system, a new control strategy and method called flux linkage section subdivide control were studied,the bad effect of rotor speed and torque were avoided effectively when the changes of the magnitude of the stator flux and the flux angle were contrary. The simulation result showed that this control scheme was feasible, the response speed were quick enough when the system was start-up,the control performances of rotor speed and torque were good, the system＇s stability and robust to stator flux angle were improved.