1. Large Step Ratio Input-Series–Output-Parallel Chain-Link DC–DC Converter.
- Author
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Zhang, Xiaotian, Tian, Mofan, Xiang, Xin, Pereda, Javier, Green, Timothy C., and Yang, Xu
- Subjects
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GALVANIC isolation , *DC-to-DC converters , *LOW voltage systems , *DC transformers , *FINANCIAL ratios , *ELECTRON tube grids , *TIME-domain analysis - Abstract
High-voltage and high-power dc–dc conversion is key to dc transmission, distribution, and generation, which requires compact and efficient dc transformers with large step ratios. This paper introduces a dc–dc converter with the input-series–output-parallel arrangement of multiple high step ratio subconverter units. Each subconverter unit is an isolated modular dc–dc converter with a stack of half-bridge cells chopping the dc down to low voltage level. The transformer provides galvanic isolation and additional step ratio. The converter achieves a large step ratio due to the combination of the series-parallel configuration, the modular cells, and the isolation transformer. The proposed dc–dc converter is analyzed in a 30 kV–1 kV, 1-MW application to discuss the operation performance, tradeoffs, power efficiency, and selection of components. Finally, the converter is validated through a laboratory downscaled prototype. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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