Optimization of a series converter for low-frequency ripple cancellation of an LED driver
| Autor: | Sarah Saeed, Jorge Garcia, Ramy Georgious, Marco A. Costa, Jesus Cardesin, Pablo J. Quintana, Douglas Camponogara |
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| Rok vydání: | 2019 |
| Předmět: |
Computer Networks and Communications
Computer science Ripple LF ripple cancellation lcsh:TK7800-8360 Topology (electrical circuits) 02 engineering and technology Inductor Capacitance law.invention lighting electronics law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Electrolytic capacitor business.industry Buck converter 020208 electrical & electronic engineering lcsh:Electronics Electrical engineering LED driver 020206 networking & telecommunications Inductance LED lamp TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGES single-phase converter Hardware and Architecture Control and Systems Engineering Signal Processing Constant current business Voltage |
| Zdroj: | Scopus RUO. Repositorio Institucional de la Universidad de Oviedo instname Electronics, Vol 8, Iss 6, p 664 (2019) Electronics Volume 8 Issue 6 |
| Popis: | In this paper, the optimization of the power and control stages of a previously proposed topology for an off-line LED electronic driver is presented. The full system avoids the use of electrolytic capacitors at the D C link, therefore increasing the lifespan and reliability of the driver. As a consequence of having a relatively small capacitance, the D C link operates with a large Low-Frequency ( L F ) voltage ripple. This work presents a design optimization for the power and control stages of a current-fed bidirectional buck converter, operating as the LED current control stage. As this block processes only the A C power arising from the L F voltage ripple, it can increase the system efficiency against the typical two-stage solution. In the original proposal, the main drawback was the high inductor losses due to the resulting large inductor currents and large inductance value. The proposed optimization ensures an enhanced design of the inductor while keeping a constant current through the LEDs. A new optimization methodology is proposed and the theoretical results have been validated in a built prototype for a 40 W LED lamp. |
| Databáze: | OpenAIRE |
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