Global Sliding Mode Control based on a Hyperbolic Tangent Function for Matrix Rectifier

  • Hu, Zhanhu (School of Automation, Guangdong University of Technology) ;
  • Hu, Wang (School of Automation, Guangdong University of Technology) ;
  • Wang, Zhiping (Guangdong Institute of Intelligent Manufacturing) ;
  • Mao, Yunshou (School of Automation, Guangdong University of Technology) ;
  • Hei, Chenyang (School of Electric Power, South China University of Technology)
  • Received : 2016.10.22
  • Accepted : 2017.04.03
  • Published : 2017.07.20


The conventional sliding mode control (CSMC) has a number of problems. It may cause dc output voltage ripple and it cannot guarantee the robustness of the whole system for a matrix rectifier (MR). Furthermore, the existence of a filter can decrease the input power factor (IPF). Therefore, a novel global sliding mode control (GSMC) based on a hyperbolic tangent function with IPF compensation for MRs is proposed in this paper. Firstly, due to the reachability and existence of the sliding mode, the condition of the matrix rectifier's robustness and chattering elimination is derived. Secondly, a global switching function is designed and the determination of the transient operation status is given. Then a SMC compensation strategy based on a DQ transformation model is applied to compensate the decreasing IPF. Finally, simulations and experiments are carried out to verify the correctness and effectiveness of the control algorithm. The obtained results show that compared with CSMC, applying the proposed GSMC based on a hyperbolic tangent function for matrix rectifiers can achieve a ripple-free output voltage with a unity IPF. In addition, the rectifier has an excellent robust performance at all times.


Supported by : Frontier and Key Technological Innovation Special Foundation of Guangdong Province


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