NDLI: Novel distortionless dimming in high power LED lighting using isolated SEPIC converter

Content Provider	IET Digital Library
Author	Pal, Somnath Singh, Bhim Shrivastava, Ashish
Abstract	A new low-cost energy-saving concept in the modern light-emitting diode (LED) illumination system is developed and implemented using an isolated single-ended primary inductance converter (SEPIC). The dimming scheme presented in this study is a single-step with negligible distortion in the AC mains current as compared to the traditional low-cost triode for alternating current (TRIAC) dimming system, which distorts the AC mains current wave-shape beyond sinusoidal nature due to the phase-cut techniques. This dimming concept is completely retrofitted, no additional arrangement is required to initiate the dimming as compared to a TRIAC dimmer or other controllers. The isolated SEPIC converter is modelled and analysed in detail using the state-space average technique. The stability of the designed converter and overall closed-loop control are verified using Bode-plot analysis. The full load converter efficiency is found around 93%, which is much higher than the conventional flyback topology-based LED driver. The concept presented in this study is tested with the help of a laboratory prototype with an LED load of 60 W.
Starting Page	3234
Ending Page	3242
Page Count	9
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 15, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/15
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.1448
Journal	IET Power Electronics
Publisher Date	2020-06-30
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Current Wave-shape AC Mains Additional Arrangement Closed Loop System Closed-loop Control System Control of Electric Power System Conventional Flyback Topology-based LED Driver Current Dimming System Cut Technique DC-DC Power Converter Designed Converter Dimming Concept Dimming Scheme Driver Circuit Illumination System LED Load Light Emitting Diode Lighting Load Converter Efficiency Low-cost Energy-saving Low-cost Triode Modern Light-emitting Diode Negligible Distortion Novel Distortionless Dimming Other Controller Power 60.0 W Power Converter Power Electronics Power Factor Correction Power Supplies to Apparatus Power Supply Primary Inductance Converter SEPIC Converter State-Space Average Technique Supervisory Circuit Switching Converter TRIAC
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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