The resonant switch mode inductor-less electronic transformer for halogen lamp

• Published in: 2004 IEEE Region 10 Conference TENCON 2004 Vol. D; pp. 101 - 104 Vol. 4
• Main Authors: Kessamaris, J., Akeburanawat, W., Yangyuen, U., Boonyaroonate, I.
• Format: Conference Proceeding
• Language: English
• Published: Piscataway NJ IEEE 2004
• Subjects: Applied sciences; Connection and protection apparatus; Electrical engineering. Electrical power engineering; Exact sciences and technology; Frequency; Inductance; Inductors; Inverters; Lamps; Miscellaneous; Power electronics, power supplies; Prototypes; Resonance; RLC circuits; Switches; Transformers and inductors; Various equipment and components; Zero voltage switching; Performance evaluation; Inverter; Prototype; Resonant circuit; Zero voltage switching; Experimental study; Inductor; Low voltage; Inductance; D class; Switching conditions; Dimmer; Full load; Selector switch; Power factor; Halogen lamp; High-frequency transformers
• ISBN: 0780385608; 9780780385603
• DOI: 10.1109/TENCON.2004.1414878

The resonant inductor-less electronic transformer (ET) for low-voltage halogen lamps based on class-D zero voltage switching (ZVS) inverter is presented and experimented. The leakage inductance of the high frequency transformer is used as the resonant inductor of the resonant circuit. The ZVS condition can be maintained from full-loaded to no-loaded or when lamp is removed or filament is opened. The experimental results show the operation of the 50 W-12 V output prototype at 53 kHz switching frequency. The measured efficiency is greater than 95 percent, nearly unity power factor. Moreover, the dimmable feature and soft-starting can be achieved by simple control.