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

Sensors

Mohd Afiq Ismail¹  Nizam Tamchek¹  Muhammad Rosdi Abu Hassan¹  Katrina D. Dambul¹  Jeyrai Selvaraj¹  Nasrudin Abd Rahim¹  Reza Sandoghchi¹ 

[1] Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; E-Mails:

关键词: Fiber Bragg Grating;    bimetal strip;    temperature sensor;    solar panel inverter;   

DOI  :  10.3390/s110908665

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.