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Development and Performance Assessment of White LED Dimmer

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Abstract

A microcontroller based electronic dimmer is developed using pulse width modulation technique. This dimmer is controllable by infra-red remote within a distance of 4 m and can be electrically connected between LED module and its driver. The performance of a developed LED dimmer is assessed on basis of variation of the photometric parameters of commercially available warm white and cool white LED luminaire used in indoor lighting applications. Four equally spaced dimming levels are considered to measure luminous efficacy, spectral power distribution, CIE 1931 chromaticity coordinates, CIE 1976 CIELUV color difference, correlated color temperature, general color rendering index and one specific color rendering index for saturated red color sample. Variations of above parameters are found out with reference to the values measured at rated voltage without the developed dimmer. Analysis of experimentally measured data shows that the developed LED dimmer is capable to vary light output of the WLED luminaire within a range of 25–100% without appreciable variation of its photometric and color parameters. The only exception is observed for the luminous efficacy parameter where it shows about 17 and 14.7% reduction for warm white and cool white LED luminaire at 25% dimming level.

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Acknowledgements

The authors wish to acknowledge the Government of West Bengal for providing the fellowship. Authors wish to acknowledge the support received from Technical Education Quality Improvement Program – Phase I & II to facilitate experimental set up to complete this work carried out at the Illumination Engineering Laboratory, Electrical Engineering Department, Jadavpur University.

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Authors and Affiliations

  1. Electrical Engineering Department, Jadavpur University, Kolkata, West Bengal, India

    Pradip Kr. Maiti & Biswanath Roy

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  1. Pradip Kr. Maiti
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  2. Biswanath Roy
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Correspondence to Pradip Kr. Maiti.

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Maiti, P.K., Roy, B. Development and Performance Assessment of White LED Dimmer. J. Inst. Eng. India Ser. B 98, 461–466 (2017). https://doi.org/10.1007/s40031-017-0275-7

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  • DOI: https://doi.org/10.1007/s40031-017-0275-7

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