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Open AccessArticle

Transformerless High Step-Up DC-DC Converters with Switched-Capacitor Network

1
Department of Electrical Engineering, Chonnam National University, Gwangju 61186, Korea
2
School of Electrical Engineering and Computer Science, Queensland University of Technology, Brisbane 4000, Australia
*
Authors to whom correspondence should be addressed.
Electronics 2019, 8(12), 1420; https://doi.org/10.3390/electronics8121420
Received: 23 October 2019 / Revised: 20 November 2019 / Accepted: 26 November 2019 / Published: 28 November 2019
(This article belongs to the Special Issue Emerging Technologies in Power Systems)
High-voltage gain conversion is necessary for several applications, especially for low voltage renewable source applications. In order to achieve a high-voltage gain, the presented paper proposes a class of transformerless DC-DC converters based on three switched-capacitor networks. The proposed converters have the following characteristics: reduced voltage stress on the capacitors and power devices; obtained high voltage gain with small duty cycle; and reduced conduction losses in the power switches. To verify the operation principle of the proposed converters, the detailed analysis in different conditions of the proposed converters and a comparison considering existing topologies are also discussed in the paper. Moreover, the parameter selection and controller design for the converters are determined. Finally, to reconfirm the theoretical analysis, both the simulation and experimental results taken from a 400 W prototype operating at 60 kHz are given.
Keywords: transformer-less topology; high-voltage gain; switched-capacitor; two-switch; boost converter transformer-less topology; high-voltage gain; switched-capacitor; two-switch; boost converter
MDPI and ACS Style

Duong, T.-D.; Nguyen, M.-K.; Tran, T.-T.; Lim, Y.-C.; Choi, J.-H. Transformerless High Step-Up DC-DC Converters with Switched-Capacitor Network. Electronics 2019, 8, 1420.

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