Auxiliary quasi-resonant dc tank electrical power converter

Details Auxiliary quasi-resonant dc tank electrical power converter Auxiliary quasi-resonant dc tank electrical power converter

2006-10-24

2006-10-24

Easthom, Karl (Department: 2838)

Electric power conversion systems

Current conversion

Using semiconductor-type converter

C363S131000, C363S138000

Reexamination Certificate

active

07126833

ABSTRACT:
An auxiliary quasi-resonant dc tank (AQRDCT) power converter with fast current charging, voltage balancing (or charging), and voltage clamping circuits is provided for achieving soft-switched power conversion. The present invention is an improvement of the invention taught in U.S. Pat. No. 6,111,770, herein incorporated by reference. The present invention provides faster current charging to the resonant inductor, thus minimizing delay time of the pulse width modulation (PWM) due to the soft-switching process. The new AQRDCT converter includes three tank capacitors or power supplies to achieve the faster current charging and minimize the soft-switching time delay. The new AQRDCT converter further includes a voltage balancing circuit to charge and discharge the three tank capacitors so that additional isolated power supplies from the utility line are not needed. A voltage clamping circuit is also included for clamping voltage surge due to the reverse recovery of diodes.

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F.Z. Peng and D.J. Adams, “An Auxiliary Quasi-Resonant Tank Soft-Switching Inverter,” IEEE Ind. Appl. Conf. Record, 2000, pp. 2397-2403, vol. 4.

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