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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.1
- 수록면
- 70 - 76 (7page)
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초록· 키워드
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For high power high step-down dc-dc conversion applications, conventional three-level dc-dc converters are subject to extreme duty cycles or increased volume and cost due to the use of transformers. In this paper, a transformerless three-level dc-dc buck converter with a high step-down conversion ratio is proposed. The converter comprises two asymmetrical half bridges, which are of the neutral point clamped structures. Therefore, the output pulse voltage of the converter can be obtained in terms of the voltage difference between the two half bridges. In order to realize harmonious switching of the converter, a modulation strategy with capacitor voltages self balance is presented. According to the deduced output dc voltage function, transformerless operation without extreme duty cycles can be implemented. Experimental results from a 1kW prototype verify the validity of the proposed converter. It is suitable for ship electric power distribution systems.
목차
Abstract
I. INTRODUCTION
II. OPERATIONAL PRINCIPLES OF THE PROPOSED CONVERTER
III. EXPERIMENTAL RESULTS
IV. CONCLUSIONS
ACKNOWLEDGMENT
REFERENCES
참고문헌 (17)
참고문헌 신청
Hassan Mohammadi Pirouz / 2010 / Modular Multilevel Converter Based STATCOM Topology Suitable for Medium-Voltage Unbalanced Systems / Journal of Power Electronics 10(5):572~578
Ebrahim Babaei / 2010 / Optimal Topologies for Cascaded Sub-multilevel Converters / Journal of Power Electronics 10(3):251~261
F. Iturriz / 2000 / Phase-controlled multilevel converters based on dual structure associations / IEEE Trans. Power Electron 15(1):92~102
H. Mohammadi / 2011 / A transformerless medium-voltage STATCOM topology based on extended modular multilevel converters / IEEE Trans. Power Electron 26(5):1534~1545
M. L. Heldwein / 2010 / Three-phase multilevel PWM rectifiers based on conventional bidirectional converters / IEEE Trans. Power Electron 25(3):545~549
Ebrahim Babaei / 2010 / Optimal Topologies for Cascaded Sub-multilevel Converters / Journal of Power Electronics 10(3):251~261
F. Iturriz / 2000 / Phase-controlled multilevel converters based on dual structure associations / IEEE Trans. Power Electron 15(1):92~102
H. Mohammadi / 2011 / A transformerless medium-voltage STATCOM topology based on extended modular multilevel converters / IEEE Trans. Power Electron 26(5):1534~1545
M. L. Heldwein / 2010 / Three-phase multilevel PWM rectifiers based on conventional bidirectional converters / IEEE Trans. Power Electron 25(3):545~549
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