ADAPTIVE TRANSITION TIME MEASUREMENT IN AN ASYMMETRICAL HALF BRIDGE

Abstract: an adaptive transition controller for a resonant converter system, including: a derivative circuit configured to receive a first signal indicative of a resonant current through an inductor in the resonant converter system and produce a derivative signal indicative of a derivative of the first signal; a peak detector circuit configured to produce a peak signal indicative of a peak value of the derivative signal over a time period; an integrator circuit configured to integrate the peak signal to produce an extension signal; and a comparator circuit configured to produce an end transition signal when the extension signal exceeds a second signal indicative of the magnetizing current in a magnetizing inductance of a transformer in the resonant converter system.

Inventor(s): Wilhelmus Hinderikus Maria LANGESLAG, Peter Theodorus Johannes Degen

CPC Classification: H02M3/01 (APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers ; dynamo-electric converters ; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters ))

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