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      A Fiber Bragg Grating—Bimetal Temperature Sensor for Solar Panel Inverters

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          Abstract

          This paper reports the design, characterization and implementation of a Fiber Bragg Grating (FBG)-based temperature sensor for an Insulted-Gate Bipolar Transistor (IGBT) in a solar panel inverter. The FBG is bonded to the higher Coefficient of Thermal Expansion (CTE) side of a bimetallic strip to increase its sensitivity. Characterization results show a linear relationship between increasing temperature and the wavelength shift. It is found that the sensitivity of the sensor can be categorized into three characterization temperature regions between 26 °C and 90 °C. The region from 41 °C to 90 °C shows the highest sensitivity, with a value of 14 pm/°C. A new empirical model that considers both temperature and strain effects has been developed for the sensor. Finally, the FBG-bimetal temperature sensor is placed in a solar panel inverter and results confirm that it can be used for real-time monitoring of the IGBT temperature.

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          Most cited references 31

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          In-fibre Bragg grating sensors

           Yun-Jiang Rao (1997)
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            Implementation of a DSP-controlled photovoltaic system with peak power tracking

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              A Review of Recent Developments in Fiber Optic Sensor Technology

               Alan Kersey (1996)
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                Author and article information

                Journal
                Sensors (Basel)
                Sensors (Basel, Switzerland)
                Molecular Diversity Preservation International (MDPI)
                1424-8220
                2011
                6 September 2011
                : 11
                : 9
                : 8665-8673
                sensors-11-08665
                10.3390/s110908665
                3231502
                22164098
                © 2011 by the authors; licensee MDPI, Basel, Switzerland.

                This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).

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