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Isolated and soft-switched power converter

Patent ·
OSTI ID:874341
 [1];  [1]
  1. Knoxville, TN
+ Show Author Affiliations

An isolated and soft-switched power converter is used for DC/DC and DC/DC/AC power conversion. The power converter includes two resonant tank circuits coupled back-to-back through an isolation transformer. Each resonant tank circuit includes a pair of resonant capacitors connected in series as a resonant leg, a pair of tank capacitors connected in series as a tank leg, and a pair of switching devices with anti-parallel clamping diodes coupled in series as resonant switches and clamping devices for the resonant leg. The power converter is well suited for DC/DC and DC/DC/AC power conversion applications in which high-voltage isolation, DC to DC voltage boost, bidirectional power flow, and a minimal number of conventional switching components are important design objectives. For example, the power converter is especially well suited to electric vehicle applications and load-side electric generation and storage systems, and other applications in which these objectives are important. The power converter may be used for many different applications, including electric vehicles, hybrid combustion/electric vehicles, fuel-cell powered vehicles with low-voltage starting, remote power sources utilizing low-voltage DC power sources, such as photovoltaics and others, electric power backup systems, and load-side electric storage and generation systems.

Research Organization:
LOCKHEED MARTIN ENERGY RES COR
DOE Contract Number:
AC05-96OR22464
Assignee:
UT-Batelle, LLC (Oak Ridge, TN)
Patent Number(s):
US 6370050
OSTI ID:
874341
Country of Publication:
United States
Language:
English

References (4)

A novel control principle of bi-directional DC-DC power conversion
  • Reimann, T.; Szeponik, S.; Berger, G.
  • PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972 https://doi.org/10.1109/PESC.1997.616843
conference January 1997
Bi-directional DC to DC converters for fuel cell systems conference January 1998
The auxiliary quasi-resonant DC link inverter conference January 1991
A three-phase soft-switched high-power-density DC/DC converter for high-power applications journal January 1991

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