Resonant LED driver with inherent constant current and power factor correction

Teodosescu, Petre Dorel; Bojan, Mircea; Marschalko, R.

doi:10.1049/el.2014.1701

Cited by 20 publications

(8 citation statements)

References 6 publications

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“…Switch-mode power converters are nonlinear circuits widely used for power management systems in many industrial applications such as in renewable energy technologies [1], electric and hybrid vehicles [2], efficient lighting [3] and servers telecommunications [4], among others. In particular, DC-AC resonant converters are switched-mode power converters, in which a DC voltage is converted into an AC one by means of oscillations in an H-bridge LC resonant tank circuit.…”

Section: Introductionmentioning

confidence: 99%

Delay effects on the limit cycling behavior in resonant inverters with state feedback

Benadero

Aroudi

Ponce

2019

NOLTA

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Bifurcations of limit cycles in an H-bridge LC resonant inverter are reexamined taking into account a time delay in the switching transition. The analysis is accomplished by means of a model of the inverter that compresses, in only three parameters, all the elements associated to both series and parallel topologies of the inverter, to the parasitic effects, to the state feedback control, and to the switching time delay. Emphasis is made in the deviation of preexisting bifurcations without delay and the new ones arising when the time delay is taken into account. It is shown from the analysis and numerical simulations that the delay can degrade the quality of oscillations and even inhibit them, but it is also demonstrated that to some extent, this drawback can be compensated by an appropriate state feedback.

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Section: Introductionmentioning

confidence: 99%

Delay effects on the limit cycling behavior in resonant inverters with state feedback

Benadero

Aroudi

Ponce

2019

NOLTA

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“…It can be calulate the output voltage in (1). In the other way, the duty cycle (d) can be obtained from (2).…”

Section: Mofidifed Flyback Converter Circuit Designingmentioning

confidence: 99%

A design of LED driver circuit for reducing production cost in Thailand industry

Lapsongphon

Pullteap

2018

MATEC Web Conf.

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Abstract. In this paper, the designing of a modified flyback converter circuit for 100 Watts LED lighting has been demonstrated. Some important factors, i.e. efficiency (ɛ), power factor (PF), and total harmonic current distortion (THDi), are considered for interpreting the performance of the proposed circuit. A commercial driver circuit which an efficiency of 94% and price of 2,000 THB has, consequently, been employed as a reference circuit. Two experimental setups, performance investigation and cost analysis, have been demonstrated for confirming the concept designed. However, the experimental results shown that an efficiency of the developed driver is 93.93%, while the implementation cost is 1,257 THB respectively. Compared with the reference circuit, we found that the performance of modified flyback circuit is almost equivalent in any parameters, while the cost is cheaper than the reference of 37.15%. This implies that there is a possibility to transfer the knowledge of designing concept to mass production for Thailand industry. In addition, it would thus be reduced the investment cost by the importation driver circuits from other countries and also to support Thailand industry for producing the high quality goods for exporting aboard.

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“…In comparison with Ref. [26], the advantage is the elimination of the input diode rectifier, which mainly is translated into achieving higher efficiency. Also, the driver topology is characterized by inherent constant current and high power factor; thus, no close-loop control is considered.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Resonant AC‐AC LED Driver

Dorel¹,

Csaba²,

MadalinaSabina³

et al. 2017

Optoelectronics - Advanced Device Structures

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The study analyses the performance of different LED circuit configurations feed from a low power resonant driver under pulse quasi-triangular currents. The considered LED driver topology is based on a bridgeless single-stage AC-AC converter with bidirectional switches and a parallel LC resonant tank. The converter performances are simultaneously analyzed in correlation with the most important features, such as the electric efficiency, luminous efficacy, power factor correction capabilities, and flickering implications.

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Resonant LED driver with inherent constant current and power factor correction

Cited by 20 publications

References 6 publications

Delay effects on the limit cycling behavior in resonant inverters with state feedback

Delay effects on the limit cycling behavior in resonant inverters with state feedback

A design of LED driver circuit for reducing production cost in Thailand industry

Analysis of a Resonant AC‐AC LED Driver

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