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 language | English |
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Title of host publication | EPE'11 : ECCE Europe Power Electronics and Adjustable Speed Drives |
Publication date | 2011 |
Publication status | Published - 2011 |
Event | 14th European Conference on Power Electronics and Applications - Birmingham, United Kingdom Duration: 30 Aug 2011 → 1 Sept 2011 Conference number: 14 |
Conference
Conference | 14th European Conference on Power Electronics and Applications |
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Number | 14 |
Country/Territory | United Kingdom |
City | Birmingham |
Period | 30/08/2011 → 01/09/2011 |
Keywords
- ZVS converters
- Efficiency
- Resonant converter
- Lighting
- Transformer