Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Patent
1998-08-28
2000-05-09
Han, Y. J.
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
323225, 363 50, G05F 1613, H02H 710
Patent
active
060608676
ABSTRACT:
In a power converter having a power switch, a rectifier and a snubber circuit having an auxiliary switch that moderates reverse recovery currents associated with the rectifier, a driver for the auxiliary switch, a method of driving the auxiliary switch and a power converter employing the driver and method. In one embodiment, the driver includes a first driver switch, coupled between the power switch and the auxiliary switch, that allows the auxiliary switch to turn on concurrently with the power switch. The driver also includes a second driver switch, coupled between the auxiliary switch and an output of the power converter, that prevents a voltage of the auxiliary switch from rising above an output voltage of the power converter to assist the auxiliary switch in turning off.
REFERENCES:
patent: 5461302 (1995-10-01), Garcia et al.
patent: 5793190 (1998-08-01), Sahlstrom et al.
patent: 5815386 (1998-09-01), Gordon
patent: 5841268 (1998-11-01), Mednik
Guichao Hua, Ching-Shan Leu, and Fred C. Lee; "Novel Zero-Voltage-Transition PWM Converters"; 1992 IEEE; pp. 55-61.
Joel P. Gegner and C. Q. Lee; "Zero-Voltage-Transition Converters Using An Inductor Feedback Technique"; 1994 IEEE, pp. 862-868.
Robert Streit and Daniel Tollik; "High Efficiency Telecom Rectifier Using a Novel Soft-Switched Boost-Based Input Current Shaper"; Nov. 1991 IEEE; pp. 720-726.
Farrington Richard W.
Gardiner William P.
Han Y. J.
Lucent Technologies - Inc.
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