Title :
Preliminary investigations of piezoelectric based LED luminary
Author :
Nielsen, David ; Andersen, Michael A. E. ; Meyer, K.S.
Author_Institution :
Tech. Univ. of Denmark, Lyngby, Denmark
fDate :
Aug. 30 2011-Sept. 1 2011
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).
Keywords :
AC-DC power convertors; filament lamps; finite element analysis; light sources; piezoelectric devices; power transformers; rectifiers; switched mode power supplies; zero voltage switching; AC/DC converter; European mains; LED driving conditions; burst mode control; final element method; incandescent bulb; light source; modulation schemes; piezoelectric based LED luminary; piezoelectric transformer; power 40 W; power stage topologies; rectifiers circuits; switch mode power supplies; zero voltage switching; Light emitting diodes; Light sources; Prototypes; Pulse width modulation; Resistance; Switches; Zero voltage switching; Efficiency; Lighting; Resonant converter; Transformer; ZVS converters;
Conference_Titel :
Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-61284-167-0
Electronic_ISBN :
978-90-75815-15-3
