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http://hdl.handle.net/10397/88755
Title: | Circuit topology analysis for LED lighting and its formulation development | Authors: | Chen, W Cheng, KWE Shao, JW |
Issue Date: | Nov-2019 | Source: | Energies, Nov. 2019, , v. 12, no. 21, 4203, p. 1-27 | Abstract: | Light emitted diode (LED) is becoming more popular in the illumination field, and the design of LED lighting is generally made to provide illumination at lower power usage, helping save energy. A power electronic converter is needed to provide the power conversion for these LEDs to meet high efficiency, reduce components, and have low voltage ripple magnitude. The power supply for LED is revisited in this paper. The LEDs connected in series with diode, transistor, or inductor paths are examined. The formulation for each of the cases is described, including the classical converters of buck, boost, buck-boost, and Cuk. The circuit reductions of the classic circuit, circuit without the capacitor, and without a freewheeling diode are studied. Using LED to replace freewheeling diodes is proposed for circuit component reduction. General equations for different connection paths have been developed. The efficiency and output ripple amplitude of the proposed power converters are investigated. Analytical study shows that the efficiency of proposed circuits can be high and voltage ripple magnitude of proposed circuits can be low. The results show that the proposed circuit topologies can be easily adapted to design LED lighting, which can meet the criteria of high efficiency, minimum components, and low-voltage ripple magnitude at the same time. | Keywords: | Led driving circuit Diode path Transistor path Inductor path Theoretical analysis Ripple amplitude Efficiency Component count |
Publisher: | Molecular Diversity Preservation International (MDPI) | Journal: | Energies | EISSN: | 1996-1073 | DOI: | 10.3390/en12214203 | Rights: | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). The following publication Chen, W.; Cheng, K.W.E.; Shao, J. Circuit Topology Analysis for LED Lighting and its Formulation Development. Energies 2019, 12, 4203 is available at https://dx.doi.org/10.3390/en12214203 |
Appears in Collections: | Journal/Magazine Article |
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Chen_Circuit_Topology_Lighting.pdf | 5.97 MB | Adobe PDF | View/Open |
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