基于滑模变结构的间接矩阵变换器—异步电机控制系统研究

The Study of Vector Control System of Induction Motor Driven by Indirect Matrix Converter Based on Sliding Mode Variable Structure

传统的交直交变频调速系统由于带有中间直流环节大电容或大电感,使得它体积大。间接矩阵变换器中间直流环节没有大储能元件,增加了它的紧凑性,而且间接矩阵变换器正弦电流传入,正弦电压输出,该变换器整流级与逆变级协调控制,可以实现零电流换流。滑模变结构是一种非线性的控制方法,将其应用到矢量控制系统中,可以减少对系统参数的依赖性。仿真结果表明基于变结构的间接矩阵变换器驱动异步电机矢量控制系统能够获得良好的动静态性能。

The deficiencies of the traditional AD-DC-AD variable frequency system are large volume and heavy harmonic content because of middle filter inductor and capacitor. The indirect matrix converter has not only similar function to traditional AC-DC-AC converter, but also compact structure, small volume and large weight. It can shape the input current and output voltage into sinusoidal wave. Double space vector modulation can realize zero current commutation of rectifier side. Sliding-mode variable structure is a nonlinear control method. It can decrease the dependence to system parameters. Simulation results display that the proposed control method possesses well dynamic and static performance.