Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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4-kW 3-phase rectifier with high efficiency and wide operational range via 3-mode SVPWM

  • Lin, Jiaqing (School of Information Engineering, Guangdong University of Technology) ;
  • Li, Zhizhong (School of Information Engineering, Guangdong University of Technology) ;
  • Zhang, Bo (School of Electric Power, South China University of Technology) ;
  • Zhang, Guidong (School of Automation, Guangdong University of Technology) ;
  • Qiu, Wei (School of Information Engineering, Guangdong University of Technology)
  • Received : 2020.05.18
  • Accepted : 2020.08.23
  • Published : 2020.11.20
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Abstract

There are 6 modes in the full working state of a traditional 3-phase rectifier, and each mode is necessary for power factor correcting and for realizing the corresponding DC-link voltage. It is obvious that too many modes in the full working state increase the switch stresses, which results in high switching loss and increased economic cost. Reducing the number of working modes is a feasible solution to solve this problem. By improving the m-mode controllability in inverters, a 3-mode control strategy is derived for the traditional 3-phase rectifier to enhance its operational features. Note that the proposed control strategy can maintain a high-power factor above 0.99 and have higher efficiency when compared with the traditional control strategy. Finally, a lab-prototype with a load varying from 800 W to 4 kW is conducted to validate the feasibility of the proposed control strategy. Experimental results show that all of the tested cases have a 0.99 power factor and that highest efficiency of 96.7%. The results also reveal that the proposed strategy is superior to the traditional one in laboratory conditions. In addition, the proposed method is generalized and can be extended to other rectifier topologies.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation of China under Grant 51907032.

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