Circuit for and method of decreasing conducted and radiated elec

Details Circuit for and method of decreasing conducted and radiated elec Circuit for and method of decreasing conducted and radiated elec

1997-10-14

1999-03-02

Riley, Shawn

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 41, 363132, 363 17, H02M 324

Patent

active

058779515

ABSTRACT:
For use in a power converter having a controlled full bridge coupled to a transformer, the bridge delivering power received from an input of the power converter to a primary winding of the transformer, a circuit for, and method of decreasing conducted and radiated electromagnetic interference of the power converter. In one embodiment, the circuit includes a switching circuit, coupled across at least a portion of the primary winding, that closes to short the portion as a function of a state of the full bridge to stabilize a voltage level of the primary winding and reduce ringing caused by the intrinsic capacitance, thereby decreasing the conducted and radiated electromagnetic interference.

REFERENCES:
patent: 5477131 (1995-12-01), Gegner
patent: 5710698 (1998-01-01), Lai et al.
Publication entitled "A Novel Zero-Voltage-Switched Half-Bridge Converter with Active Current-Clamped Transformer" by Koji Yoshida, Tatsuo Maeoka, Takuya Ishii, Hiroyuki Handa and Tamotsu Ninomiya from IEEE Power Electronics Specialists Conference Record; 1996: 6 pages.
Publication entitled "A 1 kW, 500 kHz Front-End Converter for a Distributed Power Supply System" by Loveday H. Mweene, Chris A. Wright and Martin F. Schlecht 1989 IEEE; pp. 423-432.
Paper entitled "The Design of Front-End DC-DC Converters of Distributed Power Supply Systems with Improved Efficiency and Stability" by Loveday H. Mweene pp. 25-77; 1992, Massachusetts Institute of Technology Doctrolathesis.

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