A Novel High Step-Up Converter with a Switched-Coupled-Inductor-Capacitor Structure for Sustainable Energy Systems

Hongchen Liu; Jian Ai; Fei Li

A Novel High Step-Up Converter with a Switched-Coupled-Inductor-Capacitor Structure for Sustainable Energy Systems

Hongchen Liu

Jian Ai

Fei Li

Vol. 16, No. 2, pp. 436-446, Mar. 2016

10.6113/JPE.2016.16.2.436

Coupled inductor

High step-up voltage gain

Low voltage stress

Switched capacitor

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Abstract

A novel step-up DC-DC converter with a switched-coupled-inductor-capacitor (SCIC) which successfully integrates three-winding coupled inductors and switched-capacitor techniques is proposed in this paper. The primary side of the coupled inductors for the SCIC is charged by the input source, and the capacitors are charged in parallel and discharged in series by the secondary windings of the coupled inductor to achieve a high step-up voltage gain with an appropriate duty ratio. In addition, the passive lossless clamped circuits recycle the leakage energy and reduce the voltage stress on the main switch effectively, and the reverse-recovery problem of the diodes is alleviated by the leakage inductor. Thus, the efficiency can be improved. The operating principle and steady-state analyses of the converter are discussed in detail. Finally, a prototype circuit at a 50 kHz switching frequency with a 20-V input voltage, a 200-V output voltage, and a 200-W output power is built in the laboratory to verify the performance of the proposed converter.

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Cite this article

[IEEE Style]

H. Liu, J. Ai, F. Li, "A Novel High Step-Up Converter with a Switched-Coupled-Inductor-Capacitor Structure for Sustainable Energy Systems," Journal of Power Electronics, vol. 16, no. 2, pp. 436-446, 2016. DOI: 10.6113/JPE.2016.16.2.436.

[ACM Style]

Hongchen Liu, Jian Ai, and Fei Li. 2016. A Novel High Step-Up Converter with a Switched-Coupled-Inductor-Capacitor Structure for Sustainable Energy Systems. Journal of Power Electronics, 16, 2, (2016), 436-446. DOI: 10.6113/JPE.2016.16.2.436.