A high-density 1 kW resonant power converter with a transient boost function

A series/parallel resonant DC-DC converter with secondary-side resonance and a novel input boosting feature is described. In order to greatly reduce the conduction loss (factor of four) due to circulating currents in the resonant components, the boost circuit, which requires no additional active swi...

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Bibliographic Details
Published in:IEEE transactions on power electronics 1993-10, Vol.8 (4), p.431-438
Main Authors: Steigerwald, R.L., Roshen, W., Saj, C.F.
Format: Article
Language:English
Subjects:
Applied sciences
Boosting
DC-DC power converters
Electrical engineering. Electrical power engineering
Exact sciences and technology
Flexible electronics
Inductors
Power electronics, power supplies
Resonance
RLC circuits
Steady-state
Switches
Switching circuits
Voltage fluctuations
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Summary:A series/parallel resonant DC-DC converter with secondary-side resonance and a novel input boosting feature is described. In order to greatly reduce the conduction loss (factor of four) due to circulating currents in the resonant components, the boost circuit, which requires no additional active switches, operates only when needed during transient input voltage dips. This reduces the effective input voltage range over which the converter must operate and allows optimization at the steady-state input voltage. The converter employs highly efficient resonant inductors and novel Z-folded thin flex circuit transformer windings to meet a density of greater than 50 W/in/sup 3/ with an efficiency approaching 95%. The DC-DC converter was developed for use as a 270 to 50 V line converter for distributed power applications.< >
ISSN:0885-8993
1941-0107
DOI:10.1109/63.261013