An LLC power converter comprises a switching stage and a resonant tank, the switching stage configured to switch an input power at a switching frequency to apply a switched power to the resonant tank, and the resonant tank includes a resonant inductor, a resonant capacitor, and a parallel inductance. A transformer has a primary winding connected to the resonant tank and a secondary winding. A synchronous rectifier (SR) switch is configured to selectively switch current from the secondary winding to supply a rectified current to a load. An RC filter includes a filter capacitor and a filter resistor connected across the SR switch, with the filter capacitor defining a filter capacitor voltage thereacross. A rectifier driver is configured to drive the SR switch to a conductive state in response to the filter capacitor voltage being less than a threshold value.


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    Title :

    METHOD AND SYSTEM USING A NOISE FILTER TO DRIVE SYNCHRONOUS RECTIFIERS OF AN LLC DC-DC CONVERTER


    Contributors:
    ZHOU XIANG (author) / LIU WENBO (author) / SHENG BO (author) / CHEN YANG (author) / YUREK ANDREW (author) / LIU YAN-FEI (author) / IYER LAKSHMI VARAHA (author) / SCHLAGER GERD (author) / NEUDORFHOFER MICHAEL (author) / BAECK WOLFGANG (author)

    Publication date :

    2022-03-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H02M 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 , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen




    LOOK-UP TABLE BASED EFFICIENCY TUNED CONTROL OF SYNCHRONOUS RECTIFIERS IN A DC/DC CONVERTER FOR ELECTRIC VEHICLES

    NIE ZHONG / ZHANG MENGYANG / KROZEK DENNIS et al. | European Patent Office | 2016

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