Year: 2024
Type: article
Abstract: This paper proposes a family of bipolar step‐up cells (BSUCs). Additionally, a family of interleaved parallel isolated high‐gain DC/DC converters with bipolar outputs based on the BSUCs is proposed. Using one of these converters as an example, it is demonstrated that the converter inherits the advantages of DC three‐level characteristics, resulting in low component voltage stress and low output voltage ripple. Moreover, the converter features a low input current ripple, electrical isolation, bipolar outputs, high voltage gain and operates both switches and diodes in a soft‐switching state. Furthermore, the neutral point of the bipolar outputs in this converter possesses self‐balancing characteristics, effectively mitigating the impact of parasitic parameters on voltage balance. Even with a significant deviation of the duty cycles in the main switches, the influence on the neutral point voltage balance remains very slight. Besides, to address the difficulty of accurately calculating output voltage ripple using traditional methods, a voltage ripple calculation method based on linearizing the charging of the output capacitor is proposed, characterized by its high accuracy and simplicity in the calculation process. Finally, an experimental prototype is established to verify the performance of the proposed converter.
Source: IET Power Electronics
DOI: 10.1049/pel2.12767
Authors: Jian Ai, Xianbin Yang, Yehao Shen, Hanjie Ni, Kaitao Bi, Qigao Fan
Institution: Jiangnan University
Language: English
Topic: Advanced DC-DC Converters
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,880
Award: G383175027
OpenAlex ID: W4402009092