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A family of high frequency AC-LED drivers based on ZCS-QRCs

Identificadores del recurso

I. Castro, S. Lopez, K. Martin, M. Arias, D. G. Lamar and J. Sebastian, "A family of high frequency AC-LED drivers based on ZCS-QRCs," in IEEE Transactions on Power Electronics.

1941-0107

https://ria.asturias.es/RIA/handle/123456789/10308

Procedencia

(Repositorio Institucional de Asturias: RIA)

Ficha

Título:: A family of high frequency AC-LED drivers based on ZCS-QRCs
Tema:: Publicado
Descrición:: A family of dimmable AC-LED drivers fed from dc voltages, is presented in this paper based on Zero Current Switching Quasi-Resonant Converters (ZCS-QRCs). The proposed family of drivers is based on replacing the diode in conventional converter topologies (i.e. buck, boost or buck-boost) by a string of High-Brightness Light-Emitting Diodes (HB-LED). Hence, the HB-LED string will be working as the rectifier diode and the load, switching at the same frequency of the main switch. In this case, the output current, which is experimentally validated, shows a negative current peak due to the reverse-recovery effect of the HB-LEDs. In order to reduce the reverse-recovery effect on the HB-LEDs, the main switch of the proposed topologies is replaced with a full-wave resonant switch, which makes possible to reduce the di/dt during the turn-off of the HB-LED string, therefore the reverse recovery effect is eliminated. Moreover, the dimming of the HB-LEDs is done by means of changing the switching frequency of the converter, by varying the turn-off while keeping a constant turn-on time. In order to validate the analysis, the proposed topologies have been experimentally tested on a constructed prototype with an output power of 7.5 W.; This work has been supported in part by the Spanish Government under Project MINECO-13-DPI2013-47176-C2-2-R and the Principality of Asturias under the grants “Severo Ochoa” BP14-140 and BP14-85, Project FC-15-GRUPIN14-143 and Project SV-PA-17-RIS3-4, and in part by European Regional Development Fund (ERDF) grants
Idioma:: English
Relación:: IEEE Transactions on Power Electronics; Sí, esta versión ha sido citada
Autor/Productor:: Castro, Ignacio; Lopez, Sergio; Martin, Kevin; Arias, Manuel; G. Lamar, Diego; Sebastian, Javier
Editor:: IEEE
Data:: 2018-06-05T05:42:39Z; 2018
Tipo de recurso:: article
Formato:: application/pdf

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