Proceedings ArticleDOI
A Decoupled Low-Frequency Ripple Cancellation Method for High-Power LED Driver circuits
Manish Kumar Barwar,Lalit Kumar Sahu,Pallavee Bhatnagar,Krishna Kumar Gupta,Allamsetty Hema Chander +4 more
- pp 3597-3602
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TLDR
A novel series current RC method to eliminate the double line low frequency ripple and also have removed the electrolytic capacitor is proposed.Abstract:
Now a days, flickering in LED is a challenge for researchers as it has adverse effect on human health. Using electrolytic capacitor was the initial solution for flickering. However, electrolytic capacitors are not preferred for LED driver owing to short lifetime and more prone to fault. There exists several ripple cancellation (RC) techniques discussed in literature. However, they suffer from complex control structures and high stress across the switches. In this regard, this paper proposes a novel series current RC method to eliminate the double line low frequency ripple and also have removed the electrolytic capacitor. The key features of the proposed RC method include UPF operation throughout without any external circuitry by using the multilevel converter, simple control and reduced smoothing capacitance value. The validation of the proposed method in simulation has been presented.read more
Citations
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Journal ArticleDOI
Performance analysis and reliability estimation of five‐level rectifier
Manish Kumar Barwar,Lalit Kumar Sahu,Pallavee Bhatnagar,Krishna Kumar Gupta,Allamsetty Hema Chander +4 more
Demystifying the Devices Behind the LED Light: LED Driver Circuits
Manish Kumar Barwar,Lalit Kumar Sahu,P. Tripathi,Pallavee Bhatnagar,Krishna Kumar Gupta,Allamsetty Hema Chander,Josep M. Guerrero +6 more
TL;DR: In this paper , the LED driver circuit, which enables the smooth operation of LEDs with dc and ac sources, is presented. But there is a catch: LEDs are unidirectional devices, i.e., based on dc supplies, while the primary power supply is ac.
An Electrolytic-Capacitor-Less PFC LED Driver With Low DC-Bus Voltage Stress for High Power Streetlighting Applications
TL;DR: In this paper , a single-stage, soft-switching, high power factor, flicker-free LED driver without any electrolytic capacitors was proposed for streetlighting application.
Load Current Ripple Reduction in Single Stage Single Switch High Power Factor Constant Current Switch Mode Power Supply
TL;DR: In this article , the authors discuss the inherent problem of high ripple in load current of HPF type single stage single switch constant current SMPS and discuss a low cost solution to eliminate this low frequency flicker from load current so that they can resolve this big challenge of the HPF-type single-stage single switch SMPS.
Proceedings ArticleDOI
Single Input Source-based Boost Type Multilevel Inverter Topology
TL;DR: In this article , a symmetrical five-level DC-AC multi-level inverter (MLI) with double boost capability and a single DC input source based on a switching capacitor is described.
References
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Journal ArticleDOI
A Method of Reducing the Peak-to-Average Ratio of LED Current for Electrolytic Capacitor-Less AC–DC Drivers
TL;DR: In this paper, a flyback-based electrolytic capacitor-less light-emitting diode (LED) driver is proposed, which converts the commercial ac voltage to a pulsating current with twice the line frequency driving high-brightness LEDs.
Journal ArticleDOI
Single-Stage, Universal-Input AC/DC LED Driver With Current-Controlled Variable PFC Boost Inductor
TL;DR: In this article, a single-stage flyback power factor correction (PFC) circuit with a variable boost inductance was proposed for high-brightness LED applications for the universal input voltage (90-270 Vrms).
Journal ArticleDOI
High Power Factor AC–DC LED Driver With Film Capacitors
TL;DR: In this article, a new method is proposed to eliminate electrolytic capacitors in a two-stage ac-dc light-emitting diode (LED) driver, which can help to reduce the power imbalance between ac input and dc output.