A control strategy for multiphase series capacitor boost converter with automatic current sharing and n-times gain capability. (August 2022)

• Record Type: Journal Article
• Authors: Zhao, Lingling; Sun, Min; Guo, Zehui; Dong, Yan; Pan, Siming; Huang, Qi
• Is Part Of: Energy reports. Volume 8(2022)Supplement 5
• Page Start: 340
• Page End: 346
• Publication Date: 2022-08
• Subjects: Multi-phase -- Series capacitor -- Current sharing -- N-times gain -- Capacitor charge balance; Power resources -- Periodicals; Energy industries -- Periodicals; Power resources; Periodicals; Electronic journals; 621.04205
• DOI: 10.1016/j.egyr.2022.02.171
• Languages: English
• ISSNs: 2352-4847

Abstract

Abstract: Inspired by the advantages of multiphase series capacitor boost converter, its automatic current sharing and N-times gain control strategy is proposed and investigated. Theoretical analysis is developed through capacitor charge balance and inductance volt-second balance. Then the constraint conditions of operating modes time are obtained to balance the phase current and achieve N-times gain. The final control strategy was obtained by the optimized timing sequence arrangement of the modes. The proposed control strategy is applied in 4-phase series capacitor Boost converter for CCM operation for duty cycle 0 to 1. Without any additional sensors or other devices, the automatic current sharing is achieved. The current of each phase is automatically distributed evenly among the phases, and N-times voltage gain is achieved. Finally, simulation results are given to verify the analysis of the proposed control strategy.