Thermal and Optical Performance of LEDs Mounted on Substrates With Converging–Diverging and Diverging–Converging Channels

Chakravarthii, Dheepan M. K.; Devarajan, Mutharasu; Choo, Chinheng; Suvindraj, K

doi:10.1109/tcpmt.2018.2808378

Cited by 4 publications

(2 citation statements)

References 46 publications

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“…The internal thermal resistance and junction temperature (T j ) are the critical parameters of LEDs, which must be maintained at nominal levels for reliable and robust operation [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Thermal Dissipation on the Lighting Performance and Useful Life of LED Luminaires Applied to Urban Lighting: A Case Study

Unión-Sánchez

Hermoso-Orzáez

Hervás-Pulido

et al. 2022

IJERPH

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Currently, LED technology is an established form of lighting in our cities and homes. Its lighting performance, durability, energy efficiency and light, together with the economic savings that its use implies, are displacing other classic forms of lighting. However, some problems associated with the durability of the equipment related to the problems of thermal dissipation and high temperature have begun to be detected, which end up affecting their luminous intensity and the useful life. There are many studies that show a direct relationship between the low quality of LED lighting and the aging of the equipment or its overheating, observing the depreciation of the intensity of the light and the visual chromaticity performance that can affect the health of users by altering circadian rhythms. On the other hand, the shortened useful life of the luminaires due to thermal stress has a direct impact on the LCA (Life Cycle Analysis) and its environmental impact, which indirectly affects human health. The purpose of this article is to compare the results previously obtained, at different contour temperatures, by theoretical thermal simulation of the 3D model of LED street lighting luminaires through the ANSYS Fluent simulation software. Contrasting these results with the practical results obtained with a thermal imaging camera, the study shows how the phenomenon of thermal dissipation plays a fundamental role in the lighting performance of LED technology. The parameter studied in this work is junction temperature (Tj), and how it can be used to predict the luminous properties in the design phase of luminaires in order to increase their useful life.

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“…The internal thermal resistance and junction temperature (T j ) are the critical parameters of LEDs, which must be maintained at nominal levels for reliable and robust operation [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Thermal Dissipation on the Lighting Performance and Useful Life of LED Luminaires Applied to Urban Lighting: A Case Study

Unión-Sánchez

Hermoso-Orzáez

Hervás-Pulido

et al. 2022

IJERPH

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“…In the literature review, there are many methods for measuring this critical indicator, especially in the harsh and noisy wind field. These methods can be categorized into three main parts: physical (Griffo et al, 2018), optical (Chakravarthii et al, 2018), and electrical (Deng et al, 2019) as shown in Table 1. Nowadays, many research centers have been highlighted the role of nanotechnology in power modules devices (Paknejad and Mannan, 2017).…”

Section: Introductionmentioning

confidence: 99%

Insulated-gate bipolar transistor junction temperature estimation based on ℋ∞ robust controller in wind energy applications

Alhmoud

Al-Jiboory

2019

Wind Engineering

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This article presents lifetime estimation using robust control based on thermal path degradation condition of insulated-gate bipolar transistor wind power modules. Online measurements of the on-state voltage [Formula: see text] are considered to be a promising method for obtaining a thermal-sensitive electrical parameter for wire-bond lift-off. This parameter demonstrates a good correlation with junction temperature. Due to the harsh environment, disturbances and uncertain parameters are founded within the compact set of wind energy generation systems. The uncertainty sacrifices some degree of accuracy of junction temperature measurements. Hence, robust control theory has been utilized to synthesize [Formula: see text] controller for the thermal impedance of high-power insulated-gate bipolar transistors. To study this reliability problem, an integrated model of wind energy generation system is built in MATLAB/Simulink for the closed-loop system. Simulation results show the benefit of the designed controller compared to the open-loop system in terms of thermal cycles of junction temperature and lifetime estimation.

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Design of a Contactless Torque Measurement System Based on the Photoelectric Conversion Principle

Xia,

Li,

Jin

et al. 2024

IEEE Sensors J.

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Thermal and Optical Performance of LEDs Mounted on Substrates With Converging–Diverging and Diverging–Converging Channels

Cited by 4 publications

References 46 publications

Impact of Thermal Dissipation on the Lighting Performance and Useful Life of LED Luminaires Applied to Urban Lighting: A Case Study

Impact of Thermal Dissipation on the Lighting Performance and Useful Life of LED Luminaires Applied to Urban Lighting: A Case Study

Insulated-gate bipolar transistor junction temperature estimation based on ℋ∞ robust controller in wind energy applications

Design of a Contactless Torque Measurement System Based on the Photoelectric Conversion Principle

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