Preliminary investigations of piezoelectric based LED luminary

Dennis Nielsen, Michael A. E. Andersen, Kaspar Sinding Meyer

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    Abstract

    This paper presents a preliminary study of PT (Piezoelectric Transformer) based SMPS’s (Switch Mode Power Supplies) for LED luminary. The unique properties of PTs (efficiency, power density and EMI) make them highly suitable for this application. Power stage topologies, rectifiers circuits, modulation schemes, LEDs and LED driving conditions are analyzed. A prototype radial mode PT optimized for ZVS (Zero Voltage Switching) is designed. FEM (Final Element Method) and measurements validates the PT design. A prototype PT based AC/DC converter operating from european mains is proposed. The prototype constitutes a light source equivalent to the 40 W incandescent bulb. Experimental results shows, that the prototype are capable of ZVS and dimming (the later trough use of burst mode control).
    Original languageEnglish
    Title of host publicationEPE'11 : ECCE Europe Power Electronics and Adjustable Speed Drives
    Publication date2011
    Publication statusPublished - 2011
    Event14th European Conference on Power Electronics and Applications - Birmingham, United Kingdom
    Duration: 30 Aug 20111 Sept 2011
    Conference number: 14

    Conference

    Conference14th European Conference on Power Electronics and Applications
    Number14
    Country/TerritoryUnited Kingdom
    CityBirmingham
    Period30/08/201101/09/2011

    Keywords

    • ZVS converters
    • Efficiency
    • Resonant converter
    • Lighting
    • Transformer

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