A Generalized Current Balancing Control for Series-Capacitor Buck Converter with Interleaved Phase Angle

Chung Yi Li, Chin Fu Nien, Li Lin, Hung Chi Chen*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In addition to increasing the output current, an interleaved buck converter can significantly reduce the current ripple at the output. However, the bottleneck of the interleaved buck converter application is the unbalanced inductor current. In order to achieve the current balance in the entire section of the duty cycle, this paper proposes a control architecture with interleaved alignment, using the adjustment of the duty cycle and phase offset, to analyze and realize a high output current and current balanced in three-arm series capacitor interleaved buck converters (SCIBCs) in this work. By analyzing and modeling the SCIBC and using a single-loop control architecture that feedbacks the output voltage, the proposed current-balancing method balances all inductors' current within the full duty cycle without any current sensor. In addition, the small-signal transfer function of the control signal to the output voltage and design of the controller parameters are derived according to the specification, and the SCIBC with the proposed current-balancing control with PI controller of the alignment of interleaved phase angle is constructed. The high output current and current-balancing characteristics of the proposed circuit control architecture are validated in the simulation tool SIMPLIS.

Original languageEnglish
Title of host publication2023 IEEE 24th Workshop on Control and Modeling for Power Electronics, COMPEL 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350316186
DOIs
StatePublished - 2023
Event24th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2023 - Ann Arbor, United States
Duration: 25 Jun 202328 Jun 2023

Publication series

Name2023 IEEE 24th Workshop on Control and Modeling for Power Electronics, COMPEL 2023

Conference

Conference24th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2023
Country/TerritoryUnited States
CityAnn Arbor
Period25/06/2328/06/23

Keywords

  • Current balancing
  • Interleaved phase angle
  • Series capacitor interleaved buck converters

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