Using Magnetic Regulators for the Optimization of Universal Ballasts

Perdigão, M. S.; Alonso, J.M.; Costa, Marco A. Dalla; Saraiva, E. S.

doi:10.1109/tpel.2008.2005060

Cited by 45 publications

(16 citation statements)

References 20 publications

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“…35 This method is more accurate but a bottleneck exists in the integration of variable inductors in to the LED technology. [37][38][39][40][41][42] In the modified solution, the DC-DC converter consists of a large electrolytic type storage capacitor at the output. 31 However, the losses in the transistor switch are dominant when there is a big difference in the dc source and LED load voltages.…”

Section: Classification Of Led Driversmentioning

confidence: 99%

An overview of energy efficient solid state LED driver topologies

Yadlapalli

Narasipuram²,

Anuradha³

2019

Int J Energy Res

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LED lamps are projected as prospective successors of incandescent lamps with high efficiency and a long lifetime. Therefore, there is a need to develop energy efficient LED driver topologies for achieving constant current regulation, despite the effects of temperature on the LED V-I characteristics. This paper presents the salient features of various LED driver topologies with a focus on power density, multi-string operation, renewable energy utilization, soft switching, optical wireless communication, reliability and size. The performance of the above topologies is analysed in terms of the number of components, converter switching frequency, galvanic isolation, power rating and efficiency. This paper takes a look at efficiency improvement methods while dwelling on aspects of lifetime and reliability prediction of LED drivers. The paper will anticipate some of the future trends associated with the adaptation of wide bandgap power semiconductor materials, smart LED lighting for the internet of things (IoT) and programmable LED lamp drivers. This detailed technology review is extremely useful for researchers, designers and engineers in choosing the right topology.

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Section: Classification Of Led Driversmentioning

confidence: 99%

An overview of energy efficient solid state LED driver topologies

Yadlapalli

Narasipuram²,

Anuradha³

2019

Int J Energy Res

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“…Contrary to previously presented solutions, where the delivered power was controlled by two different parameters, typically the switching frequency and another control variable, this ballast is capable of controlling several lamps using only one parameter [5], [17], [18].…”

Section: B Topology Selection and Control Techniquementioning

confidence: 99%

“…With these capacitances, all SoS limits will be obeyed. The design of the magnetic regulator was based on the methodology presented in [5] and according to the required inductance values estimated for each lamp, as shown in Table I. This design procedure was followed considering that this inductor should have a broad inductance range, in order to cover the estimated inductance range.…”

Section: Magnetic Regulatormentioning

confidence: 99%

Constant-Frequency Magnetically Controlled Universal Ballast With SoS Compliance for TL5 Fluorescent Lamps

Marques

Seidel

Perdigão

et al. 2012

IEEE Trans. Power Electron.

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Abstract-This paper presents the development of a universal electronic ballast for TL5 lamps. The intent is to efficiently operate the maximum number of TL5 lamps with different power ratings at nominal power, using a resonant variable inductance, provided by a magnetic regulator, while maintaining the switching frequency constant. A microcontroller and additional digital circuitry are used to command a dc-dc buck converter to supply the necessary dc control current to the magnetic regulator and to regulate the switching frequency of the half-bridge resonant inverter that supplies the lamp. The selection of the resonant capacitance is done in order to comply with the SoS limits established for each lamp. Experimental results with lamps ranging from 14 to 49 W, operating with high efficiency and high output, are presented in this paper.

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“…Through this information nominal power is set for each lamp. In [16] a method to detect fluorescent lamps of 18 W, 36 W, and 58 W, based on a variable resonant inductor is shown. An evolution of [16] is presented in [17], which take into account filaments heating in the resonant circuit design.…”

Section: Introductionmentioning

confidence: 99%

“…In [16] a method to detect fluorescent lamps of 18 W, 36 W, and 58 W, based on a variable resonant inductor is shown. An evolution of [16] is presented in [17], which take into account filaments heating in the resonant circuit design. An alternative to implement fluorescent lamp detection is to change duty cycle and/or switching frequency of the half-bridge inverter that supplies the lamp, as shown in [18].…”

Section: Introductionmentioning

confidence: 99%