Adaptive pulse width modulated resonant Class-D converter

Details Adaptive pulse width modulated resonant Class-D converter Adaptive pulse width modulated resonant Class-D converter

1998-06-05

1999-11-16

Nguyen, Matthew

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 97, 363131, H02M 3335, H02M 7537

Patent

active

059868953

ABSTRACT:
Switching losses at high line in variable-input Class-D resonant DC-to-DC power converters regulated by changing the duty cycle of the switching transistors are avoided by making the turn-off time of the discharging switch dependent upon the current in the resonant transformer primary circuit, thereby preserving bidirectional zero-voltage switching. Losses due to asymmetrical high current pulses in one arm of the rectified output can be mitigated by use of MOSFETs as synchronous rectifiers to take the place of rectifying diodes.

REFERENCES:
patent: 4814962 (1989-03-01), Magalhaes et al.
patent: 5159541 (1992-10-01), Jain
patent: 5285372 (1994-02-01), Huynh et al.
patent: 5546294 (1996-08-01), Schutten et al.
patent: 5612860 (1997-03-01), Meszlenyi
patent: 5615093 (1997-03-01), Nalbant
Sayed-Amir El-Hamamsy, Member, IEEE, IEEE Transactions on Power Electronics, vol. 9, No. 3, May 1994, "Design of High-Efficiency RF Class-D Power Amplifier".
Praveen K. Jain, Senior Member, IEEE, Andre St-Martin, and Gary Edwards, IEEE Transactions on Power Electronics, vol. 11, No. 3, May 1996, "Asymmetrical Pulse-Width-Modulated Resonant DC/DC Converter Topologies".
Louis Robert Nerone, IEEE Transactions on Power Electronics, vol. 12, No. 3, May 1997, "Design of a 2.5-MHZ, Soft-Switching, Class-D Converter for Electrodeless Lighting".
David C. Hamill, Department of Electronic and Electrical Engineering, University of Surrey, Guildford GU2 5XH, United Kingdom, IEEE 1996, "Class DE Inverters and Rectifiers for DC-DC Conversion".

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