Analysis of a New Parallel Three-Level Zero-Voltage Switching DC Converter

Title & Authors
Analysis of a New Parallel Three-Level Zero-Voltage Switching DC Converter
Lin, Bor-Ren; Chen, Jeng-Yu;

Abstract
A novel parallel three-level zero voltage switching (ZVS) DC converter is presented for medium voltage applications. The proposed converter includes three sub-circuits connected in parallel with the same power switches to share load current and reduce the current stress of passive components at the output side. Thus, the size of the output chokes is reduced and the switch counts in the proposed converter are less that in the conventional parallel three-level DC/DC converter. Each sub-circuit combines one half-bridge converter and one three-level converter. The transformer secondary windings of these two converters are connected in series in order to reduce the size of output inductor. Due to the three-level circuit topology, the voltage stress of power switches is equal to $\small{V_{in}/2}$. Based on the resonant behavior by the output capacitance of power switches and the leakage inductance (or external inductance) at the transition interval, each switch can be turned on under ZVS. Finally, experiments based on a 2 kW prototype are provided to verify the performance of the proposed converter.
Keywords
Parallel three-level converter;Flying capacitor;ZVS converter;
Language
English
Cited by
References
1.
J. Rodriguez, Jih-Sheng Lai and Fang Zheng Peng, “Multilevel inverters: a survey of topologies, controls, and applications,” IEEE Trans. Ind. Electron., vol. 49, no. 4, pp. 724-738, 2002.

2.
M. Malinowski, K. Gopakumar, J. Rodriguez and M. A. Pérez, “A survey on cascaded multilevel inverters,” IEEE Trans. Ind. Electron., vol. 57, no. 7, pp. 2197-2206, 2010.

3.
H. Ertl, J. W. Kolar and F. C. Zach, “Analysis of a multilevel multicell switch-mode power amplifier employing the flying-battery concept,” IEEE Trans. Ind. Electron., vol. 49 , no. 4, pp. 816-823, 2002.

4.
D. Montesinos-Miracle, M. Massot-Campos, J. Bergas-Jane, S. Galceran-Arellano, and A. Rufer, “Design and control of a modular multilevel DC/DC converter for regenerative applications,” IEEE Trans. Power Electronics, vol. 28, no. 8, pp. 3970-3979, Aug. 2013

5.
Bor-Ren Lin and Chia-Hung Chao, “Soft-Switching Converter With Two Series Half-Bridge Legs to Reduce Voltage Stress of Active Switches,” IEEE Trans. Ind. Electron., vol. 60, no. 6, pp. 2214-2224, 2013

6.
J. P. Rodrigues, S. A. Mussa, I. Barbi and A. J. Perin, “Three-level zero-voltage switching pulse-width modulation DC-DC boost converter with active clamping,” IET Proc.- Power Electron., vol. 3, no. 3, pp. 345-354, 2010.

7.
Wu Chen and Xinbo Ruan, “Zero-voltage-switching PWM hybrid full-bridge three-level converter with secondary-voltage clamping scheme,” IEEE Trans. Ind. Electron., vol. 55, no. 2, pp. 644-654, 2008.

8.
Bor-Ren Lin, Shih-Kai Chung, and Tung-Yuan Shiau, “Zero-voltage-switching DC/DC converter with three three-level pulse-width modulation circuit cells”, IET Proc. - Power Electron., vol. 6, no. 1, pp. 1-8, 2013.

9.
Y. Firouz, M. T. Bina, and B. Eskandari, “Efficiency of three-level neutral-point clamped converters: analysis and experimental validation of power losses, thermal modelling and lifetime prediction”, IET Proc. - Power Electron., vol. 7, no. 1, pp. 209-219, 2014.

10.
Yong Shi and Xu Yang, “Wide range soft switching PWM three-level DC-DC converters suitable for industrial applications”, IEEE Trans. Power Electron., vol. 29, no. 2, pp. 603-616, 2014.

11.
Xinbo Ruan, Dayu Xu, Linquan Zhou, Bin Li and Qianhong Chen, “Zero-voltage-switching PWM three-level converter with two clamping diodes,” IEEE Trans. Ind. Electron., vol. 49, no. 4, pp. 790-799, 2002.

12.
K. Jin and X. Ruan, “Zero-voltage-switching multiresonant three-level converters,” IEEE Trans. Ind. Electron., vol. 54, no. 3, pp. 1705-1715, 2007.

13.
Rui-jun Cheng, Yu-gang Yang, Hong-yan Liang and Ying Jiang, “Thin-film integrated magnetic component for three-level LLC resonant converter,” in Proc. of IEEE ICIT Conf., pp. 739-743, 2005.

14.
Yilei Gu, Zhengyu Lu, Lijun Hang, Zhaoming Qian, and Guisong Huang, “Three-level LLC series resonant DC/DC converter,” IEEE Trans. Power Electron., vol. 20, no. 4, pp. 781-789, 2005.

15.
Bor-Ren Lin and Tung-Yuan Shiau,”Analysis and implementation of a new ZVS DC converter for medium power application”, Journal of Electrical Engineering Technology, vol. 9, no. 4, pp. 1296-1308, 2014.

16.
Bor-Ren Lin, and Po-Jen Cheng, “Analysis of an interleaved zero-voltage switching/zero current switching resonant converter with duty cycle control”, IET Proc. - Power Electron., vol. 6, no. 2, pp. 374-382, 2013.