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Repositorio de la Universidad de Oviedo > Producción Bibliográfica de UniOvi: RECOPILA > Artículos >

Use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10651/48549

Título : An electrolytic capacitorless modular three-phase ac-dc LED driver based on summing the light output of each phase
Autor(es) y otros: Castro Álvarez, Ignacio
Vázquez Ardura, Aitor
González Lamar, Diego
Arias Pérez de Azpeitia, Manuel
Hernando Álvarez, Marta María
Sebastián Zúñiga, Francisco Javier
Palabras clave: Single phase
Ac-dc power conversion
Power Factor Correction,
HB-LED driver
Fecha de publicación : 2018
Editorial : IEEE
Versión del editor: http://dx.doi.org/10.1109/JESTPE.2018.2868950
Citación : IEEE Journal of Emerging and Selected Topics in Power Electronics (2018); doi:10.1109/JESTPE.2018.2868950
Resumen : The proposal of this work is a modular three-phase ac-dc LED driver for high power luminaires based on Light- Emitting Diodes (LEDs), that uses each phase to control an independent LED load removing in the process both the electrolytic capacitor and the second stage to increase both the lifetime and the efficiency. The driving of each LED load is done by means of a dc-dc converter operating as a Loss Free Resistor responsible for controlling the current across it. Furthermore, each dc-dc converter needs to achieve Power Factor Correction (PFC) to comply with the restrictive IEC 61000-3-2 Class C requirements. Hence, achieving unity Power Factor (PF) and low Total Harmonic Distortion (THD). Taking advantage of the light properties, the output of the LED driver will be the sum of the light of each of the phases. Therefore, a theoretical study will be carried out to observe the feasibility of removing the electrolytic capacitor while guaranteeing a flicker free behaviour of the LED luminaire, even if the current of each string is pulsating at twice the mains frequency. This particular performance under high output current and voltage ripples requires reevaluating the wellknown limits between the conduction modes in PFC converters. In addition, the theoretical analysis also discusses and proposes control methods for the LED driver, which thanks to its modularity can easily scale in power to drive high power luminaires. In order to validate the theoretical analysis, a prototype has been built comprised of three PFC boost converters disposing of their electrolytic capacitors. The designed prototype operates in the full range of the European three-phase line voltage, which varies between 380 V and 420 V, and supplies an output light of 42.000 lm at a maximum power of 300 W while achieving an electrical efficiency of 97.5%
URI : http://hdl.handle.net/10651/48549
ISSN : 2168-6777
2168-6785
Aparece en las colecciones: Artículos
Ingeniería Eléctrica, Electrónica, de Computadores y Sistemas
Investigaciones y Documentos OpenAIRE

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