Coupled-Inductor-Based High-Step-Down-Ratio Converter with Output Current Ripple Reduction

This paper presents a sector subdivision based space vector pulse width modulation (SVPWM) strategy with reduced current ripple for a three-level inverter. Using the output current ripple theory, closed-form expressions of average current ripple vectors for both continuous and discontinuous switching sequences are derived. Based on the sector and triangle distributions of conventional SVPWM strategy, each triangle is further divided into three small-regions. Then the switching sequence with the lowest magnitude of the average current ripple vector is applied in every small-region, so that the advantages of continuous pulse width modulation (CPWM) and discontinuous pulse width modulation (DPWM) under different modulation index conditions are combined to reduce the current ripple in the whole modulation range. The output performance of the proposed strategy is compared with the conventional CPWM and DPWM strategy, and experimental results verify that the proposed strategy could reduce the current ripple of three-level inverters effectively.

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Optimal space vector pulse width modulation strategy of neutral point clamped three‐level inverter for output current ripple reduction

IET Power Electronics ◽

10.1049/iet-pel.2016.0544 ◽

2017 ◽

Vol 10 (12) ◽

pp. 1638-1646 ◽

Cited By ~ 5

Author(s):

Wei Chen ◽

Wenkai Dai ◽

Zhiqiang Wang ◽

Guozheng Zhang ◽

Yan Yan ◽

...

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Neutral Point ◽

Output Current ◽

Space Vector ◽

Ripple Reduction ◽

Optimal Space ◽

Current Ripple

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High efficiency current-doubler rectifier with low output current ripple and high step-down voltage ratio

2008 IEEE International Conference on Sustainable Energy Technologies ◽

10.1109/icset.2008.4747130 ◽

2008 ◽

Author(s):

Chih-Lung Shen ◽

Cheng-Tao Tsai ◽

Yu-En Wu

Keyword(s):

High Efficiency ◽

Output Current ◽

Voltage Ratio ◽

Step Down ◽

Current Ripple

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High-efficiency current-doubler rectifier with low output current ripple and high step-down voltage ratio

IEEJ Transactions on Electrical and Electronic Engineering ◽

10.1002/tee.21838 ◽

2013 ◽

Vol 8 (2) ◽

pp. 182-189 ◽

Cited By ~ 6

Author(s):

Cheng-Tao Tsai ◽

Chih-Lung Shen

Keyword(s):

High Efficiency ◽

Output Current ◽

Voltage Ratio ◽

Step Down ◽

Current Ripple

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Literature Survey of Interleaved DC-DC Step-Down Converters for Proton Exchange Membrane Electrolyzer Applications

Transactions on Environment and Electrical Engineering ◽

10.22149/teee.v3i1.129 ◽

2019 ◽

Vol 3 (1) ◽

pp. 33 ◽

Cited By ~ 4

Author(s):

Vittorio Guida ◽

Damien Guilbert ◽

Bruno Douine

Keyword(s):

Hydrogen Production ◽

Fossil Fuels ◽

Proton Exchange Membrane ◽

Water Electrolysis ◽

Proton Exchange ◽

Voltage Gain ◽

Output Current ◽

Step Down ◽

Exchange Membrane ◽

Current Ripple

Recently, the use of electrolyzers for hydrogen production through water electrolysis is of great interest in the industrial field to replace current hydrogen production pathways based on fossil fuels (e.g. oil, coal). The electrolyzers must be supplied with a very low DC voltage in order to produce hydrogen from the deionized water. For this reason, DC-DC step-down converters are generally used. However, these topologies present several drawbacks from output current ripple and voltage gain point of view. In order to meet these expectations, interleaved DC-DC step-down converters are considered as promising and interesting candidates to supply proton exchange membrane (PEM) electrolyzers. Indeed, these converters offer some advantages including output current ripple reduction and reliability in case of power switch failures. In addition, over the last decade, many improvements have been brought to these topologies with the aim to enhance their conversion gain. Hence, the main goal of this paper is to carry out a thorough state-of-the-art of different interleaved step-down DC-DC topologies featuring a high voltage gain, needed for PEM electrolyzer applications.

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