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Non-isolated Inductor-less Soft-Switching Bus Converter with Self-Driven
Case ID:
04.090
Web Published:
9/3/2012
This invention proposes a simple topology for the first stage of non-isolated two-stage applications. The output inductor is eliminated. The magnetizing current is used to achieve ZVS for all switches. By choosing leakage inductance and output capacitance carefully, the turn-off current for the primary switch is very small and ZCS is achieved. Most importantly, the body diode loss is eliminated. A prototype is built to verify the theoretical analysis. Its efficiency is as high as 96% at 1MHz switching frequency. Compared with conventional PWM Buck, it can increase power density by 2.5 times.
Patent Information:
App Type
Country
Serial No.
Patent No.
File Date
Issued Date
Patent Status
US Continuation-in-Part
*United States
11/094,434
7,254,047
3/31/2005
8/7/2007
Abandoned
Category(s):
Electrical
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For Information, Contact:
Li Chen
Licensing Associate
Virginia Tech Intellectual Properties, Inc.
(540) 443-9217
lchen@vtip.org
Inventors:
Yuancheng (frank) Ren
Julu Sun
Ming Xu
Fred Lee
Keywords:
Power Conversion/Control