Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1999-08-18
2000-07-04
Riley, Shawn
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 89, H02M 7217
Patent
active
060847921
ABSTRACT:
A power converter using a switching signal having at least three levels of amplitude, one of which amplitude levels has a zero amplitude level during a predetermined switching interval, is provided. The power converter includes a circuit module having first and second input terminals for receiving the switching signal. The circuit module in turn is made up of a first power transistor and second power transistor. Circuitry is electrically coupled to a predetermined one of the power transistors for maintaining a predetermined voltage level across the gate terminal of the predetermined one of the power transistors during the switching interval of zero amplitude. The predetermined voltage level is chosen to enable that predetermined power transistor to continue in a respective "on" state notwithstanding of the presence of the switching interval of substantially zero amplitude. The circuitry further allows for removing or discharging the predetermined voltage upon termination of the switching interval of zero amplitude level to enable the predetermined power transistor to transition to a respective "off" state. The power converter may be conveniently used to extend a self-driving synchronous rectification technique to a broader range of output voltages and circuit topologies and provides over-voltage protection to the gates power transistors, and the capability to directly parallel additional modules.
REFERENCES:
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W. Tabisz, F. Lee, and D. Chen. "A MOSFET Resonant Synchronous Rectifier for High Frequency DC/DC Converters",IEEE PESC, pp. 769-779 Dec. 1990.
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C. Blake Jr., D. Kinzer, and P.Wood, "Synchronous Rectifiers Versus Schottky Diodes: A Comparison of the Losses of a Synchronous Rectifier vs. the Losses of a Schottky Diode Rectifier", IEEE APEC '94, pp. 17-23, Feb. 1994.
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Butler Stephen J.
Chen Wei
Hua Guichao
Sable Daniel M.
Mora Enrique J.
Riley Shawn
VPT, Inc.
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