Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 35, Issue 11, Pages 12383-12400Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.2984714
Keywords
Voltage control; ISO; Topology; Windings; Power conversion; Resistors; Current sharing; input-parallel output-series (IPOS); input-series output-parallel (ISOP); input-series output-series (ISOS); series-parallel systems; voltage sharing
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Funding
- National Natural Science Foundation of China [51922028, 51677028]
- National Key R&D Program of China [2017YFB0903905]
- Scientific Research Foundation of Graduate School of Southeast University [YBPY1972]
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Recently, more occasions with high input voltage and/or high output voltage applications are emerging. However, the existing switching devices are limited by the voltage stress, e.g., the available maximum blocking voltage of insulated-gate bipolar transistors is 6.5 kV. Therefore, several methods are provided to solve this issue, including series connection of switches, multilevel converters, and modular series-parallel structures, where the modular series-parallel systems are the most popular choice due to the advantages of low cost, simple design process, high modularity, reliability, and redundancy. The main objective of series-parallel systems is to ensure the sharing of input/output voltage/current. Based on this, a comprehensive review on the available voltage/current sharing methods for series-parallel systems, which include input-series output-parallel, input-parallel output-series, and input-series output-series structures is provided in this article. Moreover, the relationships between the input voltage/current sharing and output voltage/current sharing of series-parallel systems are explained.
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