Three-Level SEPIC with Improved Efficiency and Balanced Capacitor Voltages

Woo-Young Choi; Seung-Jae Lee

Three-Level SEPIC with Improved Efficiency and Balanced Capacitor Voltages

Woo-Young Choi

Seung-Jae Lee

Vol. 16, No. 2, pp. 447-454, Mar. 2016

10.6113/JPE.2016.16.2.447

Output capacitor voltage balancing

Switching loss

Three-level single-ended primary-inductor converter (SEPIC)

Voltage stress

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Abstract

A single-ended primary-inductor converter (SEPIC) features low input current ripple and output voltage up/down capability. However, the switching devices in a two-level SEPIC suffer from high voltage stresses and switching losses. To cope with this drawback, this study proposes a three-level SEPIC that uses a low voltage-rated switch and thus achieves better switching performance compared with the two-level SEPIC. The three-level SEPIC can reduce switch voltage stresses and switching losses. The converter operation and control method are described in this work. The experimental results for a 500 W prototype converter are also discussed. Experimental results show that unlike the two-level SEPIC, the three-level SEPIC achieves improved power efficiency with balanced capacitor voltages.

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Cite this article

[IEEE Style]

W. Choi and S. Lee, "Three-Level SEPIC with Improved Efficiency and Balanced Capacitor Voltages," Journal of Power Electronics, vol. 16, no. 2, pp. 447-454, 2016. DOI: 10.6113/JPE.2016.16.2.447.

[ACM Style]

Woo-Young Choi and Seung-Jae Lee. 2016. Three-Level SEPIC with Improved Efficiency and Balanced Capacitor Voltages. Journal of Power Electronics, 16, 2, (2016), 447-454. DOI: 10.6113/JPE.2016.16.2.447.