2025 Vol.8 Apr.N02

• Title: Dual closed-loop feedback control of inverter current based on SVPWM technique
• Name: Youbo Jia 1， Jian Hu 2，Chunhang Qu3*
• Company: 1.Changchun Institute of Architecture, School of Electrical Information, 130607,Jilin, China 2.FAW-FINDREAMS New Energy Technology Limited Company，Equipment Department，130000,Jilin, China 3.Changchun Humanities and Sciences College, School of Computer Sci
• Abstract:

  The inverter current control method mainly adjusts the pulse width of the output current by pulse width modulation based on the deviation of the feedback signal from the preset value. Due to the lack of voltage loop synergy, the current control is easily affected by load fluctuation and grid voltage change, resulting in poor control stability. In this regard, a dual closed-loop feedback control method of inverter current based on SVPWM technology is proposed. By constructing the transfer function, an IIR low-pass filter is used to low-pass filter the inverter voltage and current data. And the dual-loop control structure is constructed by combining the PID controller, in which the voltage outer loop is responsible for maintaining the stability of the output voltage and tracking the set value, while the current inner loop is responsible for responding quickly to the load changes and ensuring the stability of the output current. And combined with the SVPWM technique, the target voltage vector is projected under the α-β coordinate system, and the time is allocated according to the three nearest fundamental vectors, so as to realize the current feedback control. In the experiments, the control stability of the proposed method is verified. The test and comparison results make it clear that the current ripple coefficient of the inverter output is 1.75% when the proposed method is used for the inverter current control, which possesses a more desirable control stability.

  
  

• Keyword: inverter; current control; double closed loop; feedback control; SVPWM;
• DOI: 10.12250/jpciams2025090413
• Citation form: Youbo Jia ,Jian Hu,Chunhang Qu.Dual closed-loop feedback control of inverter current based on SVPWM technique[J]. Computer Informatization and Mechanical System,2025,Vol.8,pp.

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