矩阵变换器-永磁同步电机系统的S型滑模观测器矢量控制

A Novel S Type Sliding-Mode Observer Used in Vector Control for Two-Stage Matrix Converter-Permanent Magnet Synchronous Motor

针对传统滑模观测器开关函数切换带来的抖动、滤波器延时问题,利用S型开关函数替代滑模观测器中传统符号开关函数,在解决了上述问题同时省去了观测器中的低通滤波器和角度补偿环节,使系统具有响应快、鲁棒性强和结构简单等优点。分析了该观测器结构及消抖原理,依据稳定性判据给出了滑模增益取值范围,并将此S型观测器应用于双级矩阵变换器驱动的永磁同步电机系统,获得了优良传动性能的同时,更具有"绿色"网侧性能。实验结果验证了方案可行性和正确性。

A novel S type switch function is adopted instead of conventional sign switch function to overcome two main problems of conventional sliding mode observer,i.e.,chattering and filter delay. The above problems are all solved effectively meanwhile the low pass filter and angle compensation of observer can be eliminated and the excellent performance of fast response, strong robustness and simple structure is obtained. The observer structure and jitters elimination principle are analyzed. The sliding mode gain coefficient is given based on stability criterion. In addition, this S type observer is applied to the system of permanent magnet synchronous motor(PMSM) driven by two-stage matrix converter(TSMC). The system not only owns the excellent driving-performance, but also can always achieve green input performance. The feasibility and validity of the proposed strategy are verified.