High-power high-frequency DC-to-DC converters
Three new dc-to-dc converter topologies aimed at high-power high-frequency applications are introduced. Major system parasitics, namely, the leakage inductance of the transformer and the device output capacitance are efficiently utilized. All circuits operate at a constant switching frequency, thus simplifying design of the reactive elements. Of the three circuits the single-phase and three-phase versions of the dual-active-bridge topology demonstrate minimal electrical stresses, better utilization of the transformer, bi-directional and buck-boost model of operation. The power-transfer characteristics and soft-switching regions on the Vout-Iout plane are identified. Two coaxial transformers with different cross-sections were built for a rating of 50 kVA. The measured leakage inductance at 50 kHz is seen to be in the vicinity of 150-250 nH, with power density of approximately 0.1 kg/kW. Based on the single-phase dual-active-bridge topology, a 50kW, 50-kHz converter operating at an input voltage of 200V dc and an output voltage of 1,600V dc was fabricated.
- Research Organization:
- Wisconsin Univ., Madison, WI (United States)
- OSTI ID:
- 5484453
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
240202* -- Power System Networks
Transmission & Distribution-- DC Systems-- (1990-)
42 ENGINEERING
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
DC SYSTEMS
DC TO DC CONVERTERS
DESIGN
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
FREQUENCY RANGE
KHZ RANGE
KHZ RANGE 01-100
MATHEMATICS
POWER SYSTEMS
TOPOLOGY
TRANSFORMERS