Application of Phase Adjustment of Fuel Cell DC-DC Converter
Journal Title: 河南科技大学学报（自然科学版） - Year 2019, Vol 40, Issue 2
Abstract
The output power of the fuel cell direct current-direct current ( DC-DC) converter under light-load conditions were relatively low. If the operation of all electronic devices was still retained, the efficiency of the DC-DC converter would be reduced. At this time, the phase number adjustment strategy could improve the conversion efficiency of the fuel cell DC-DC. Taking the four-phase interleaved parallel Boost as the research object, the efficiency equation of the single-phase Boost was deduced from the power loss of each device of the converter, and the efficiency curve of the parallel Boost converter with different working phase numbers was plotted. The effect of different load states and switching frequencies on the efficiency curve was analyzed.Simulation analysis and experimental results verified the correctness of the theoretical analysis. Under the requirement of satisfying the low voltage current ripple of the fuel cell, changing the number of on-line working phases of the fuel cell DC-DC converter under light load conditions increases the conversion efficiency by 32% at the maximum.
Authors and Affiliations
Liang HUANG, Jin HUANG, Ruiming ZHANG, Changjun XIE
Keywords
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- EP ID EP422472
- DOI 10.15926/j.cnki.issn1672-6871.2019.02.006
- Views 112
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