Static and Dynamic Photoelectrothermal Modeling of LED Lamps Including Low-Frequency Current Ripple Effects

Almeida, Pedro S.; Bender, Vitor C.; Braga, Henrique A. C.; Costa, Marco A. Dalla; Marchesan, Tiago Bandeira; Alonso, J.M.

doi:10.1109/tpel.2014.2340352

Cited by 64 publications

(30 citation statements)

References 30 publications

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“…The models presented in [7][8][9][10][11][12][13][14][15] have parameters that are difficult to measure, as the junction temperature for instance, because this variable needs to be measured inside the LEDs, which is difficult to access. The model presented in [16,17] also incorporates optic concepts that are not essentials to simulate the electric behaviour of the LEDs. In [18], a review of LED models is presented; some of them are good alternatives to simulate the electrical behaviour of LEDs.…”

Section: Simulation Example With a Dc-dc Convertermentioning

confidence: 99%

“…The LED parameters are evaluated by means of straightforward measurements of current and voltage with the help of conventional instruments like multimeter and oscilloscope, which are available in a conventional electronic laboratory. Presently, there are some models proposed in the literature [7][8][9][10][11][12][13][14][15][16][17][18], but they are difficult to use, because they have several optical and thermal parameters to be extracted like for example the LED junction temperature.…”

Section: Introductionmentioning

confidence: 99%

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Simplified electrical modelling of power LEDs for DC–DC converter analysis and simulation

Osorio

Alonso

Pinto

et al. 2017

Circuit Theory & Apps

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SUMMARYThis paper presents a model of power light emitting diodes (LEDs) based on electrical variables and considering the concept of LED 'equivalent resistance', which has previously been used in discharge lamp modelling and is suitable to achieve fast simulations of LED converter systems. The model can be obtained with only some simple electrical measurements, thus making its implementation quite straightforward. The proposed model is oriented to the electronic engineering area, and it has special application for the simulation of the electrical behaviour of LEDs and dc-dc converter systems by using software like Simulink. In addition, the proposed model can also be employed for the theoretical analysis and design of LED drivers. Experimental and simulation results are obtained proving the feasibility of the proposed model.

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Section: Simulation Example With a Dc-dc Convertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simplified electrical modelling of power LEDs for DC–DC converter analysis and simulation

Osorio

Alonso

Pinto

et al. 2017

Circuit Theory & Apps

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“…However, in the case of such a manner of polarization, too big power losses appeared on the resistor. Therefore, producers of integrated circuits began to produce special‐purpose integrated circuits dedicated to the power supply of LED lamps containing the LED connected in different configurations…”

Section: Introductionmentioning

confidence: 99%

Modeling power supplies of LED lamps

Górecki

Ptak

2017

Circuit Theory & Apps

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Summary In the paper, the model of the power supply of the LED lamp in the form dedicated for SPICE is proposed. The form of the worked out by the authors' model is presented, and the results of experimental verification of this model for the LED lamp of the type CLA25 are shown. The presented model is elaborated only for the power supply of LED lamps, in which the constant output voltage is stabilized. This model has the form of a subcircuit for SPICE, and it describes the influence of load resistance, amplitude of the input voltage, and the ambient temperature on both the input current and the output voltage. It is confirmed that the worked out model describes correctly both the waveform of the current received from the electroenergy network and the influence of the load current, the ambient temperature, and the supply voltage on the output voltage.

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“…This work offers a two-stage flyback/ Buck converter topology for which a low output current ripple is obtained. Taking into account all the facts mentioned above, many research interests are related to the minimization of the lowfrequency current ripples first because of optical behavior and lifespan of the LED and second because of the lower efficacy of LED in high current ripples [19]. Given that, a low ripple for the LED current can be considered a good practice in designing of high quality LED lighting systems.…”

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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Static and Dynamic Photoelectrothermal Modeling of LED Lamps Including Low-Frequency Current Ripple Effects

Cited by 64 publications

References 30 publications

Simplified electrical modelling of power LEDs for DC–DC converter analysis and simulation

Simplified electrical modelling of power LEDs for DC–DC converter analysis and simulation

Modeling power supplies of LED lamps

Analysis of a Resonant AC‐AC LED Driver

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