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Sensors 2011, 11(9), 8665-8673; doi:10.3390/s110908665
Article

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

1,* , 1
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1,2
,
1
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1 Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia 2 Faculty of Engineering, Multimedia University, 63100 Cyberjaya, Selangor, Malaysia 3 Photonic Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia
* Author to whom correspondence should be addressed.
Received: 27 July 2011 / Revised: 27 August 2011 / Accepted: 5 September 2011 / Published: 6 September 2011
(This article belongs to the Section Physical Sensors)
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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.
Keywords: Fiber Bragg Grating; bimetal strip; temperature sensor; solar panel inverter Fiber Bragg Grating; bimetal strip; temperature sensor; solar panel inverter
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Ismail, M.A.; Tamchek, N.; Hassan, M.R.A.; Dambul, K.D.; Selvaraj, J.; Rahim, N.A.; Sandoghchi, S.R.; Adikan, F.R.M. A Fiber Bragg Grating—Bimetal Temperature Sensor for Solar Panel Inverters. Sensors 2011, 11, 8665-8673.

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