Indirect Thermographic Measurement of the Contact Temperature of an Electromechanical Relay

Krzysztof Dziarski; Łukasz Drużyński; Arkadiusz Hulewicz; Józef Piechocki

doi:10.2478/msr-2026-0009

Abstract

The temperature of an electromechanical relay is related to the value of the contact resistance. The value of the contact resistance depends, among other things, on the degree of wear and oxidation of the contacts. A too high temperature of the relay contacts leads to their further degradation and an increase in contact resistance. For this reason, monitoring this value is important. In this paper, monitoring of the contact temperature of an electromechanical relay using indirect thermographic temperature measurement is proposed. This approach consists of two parts: the first part is based on thermographic measurement of the relay case, and the second part estimates the contact temperature based on the relationship between the case temperature (measured by a thermal camera) and the contact temperature. The finite element method (FEM) was used in the second part. The results obtained using this method were validated through comparison with experimental measurements acquired by an alternative method.

References

Ramirez-Laboreo, E., Sagues, C., Llorente, S. (2016). A new model of electromechanical relays for predicting the motion and electromagnetic dynamics. IEEE Transactions on Industry Applications, 52 (3), 2545–2553. https://doi.org/10.1109/TIA.2016.2518120
Search in Google Scholar Back to article
Antonov, M., Krysan, I. (2020). An electronic key with galvanic isolation for monitoring the state of elements in energy converters. In 2020 IEEE Problems of Automated Electrodrive: Theory and Practice (PAEP). IEEE, 1–4. https://doi.org/10.1109/PAEP49887.2020.9240828
Search in Google Scholar Back to article
Cheng, C., Zhou, Z., Li, W., Deng, Z., Mi, C. C. (2021). A power relay system with multiple loads using asymmetrical coil design. IEEE Transactions on Industrial Electronics, 68 (2), 1188–1196. https://doi.org/10.1109/TIE.2020.2970636
Search in Google Scholar Back to article
Wu, G., Dong, K., Xu, Z., Xiao, S., Wei, W., Chen, H., Li, J., Huang, Z., Li, J., Gao, G., Kang, G., Tu, C., Huang, X. (2022). Pantograph–catenary electrical contact system of high-speed railways: Recent progress, challenges, and outlooks. Railway Engineering Science, 30, 437–467. https://doi.org/10.1007/s40534-022-00281-2
Search in Google Scholar Back to article
Camarillo-Peñaranda, J. R., Aredes, M., Ramos, G. (2021). Hardware-in-the-loop testing of a distance protection relay. IEEE Transactions on Industry Applications, 57 (3), 2326–2331. https://doi.org/10.1109/TIA.2021.3066328
Search in Google Scholar Back to article
Bombita, J. E., Alsado, J. R., Ortiz, G. N., Enojas, M. J. B. (2020). Comprehensive measurement system for electromechanical relay. International Journal of Advanced Trends in Computer Science and Engineering, 9 (1.1), 199–204. https://doi.org/10.30534/ijatcse/2020/3591.12020
Search in Google Scholar Back to article
Andonova, A. V., Ivanov, E., Andreev, A. S. (2008). Thermographic inspection of relays for railway safety equipment. In Electronics’ 2008. Sofia, Bulgaria: Technical University, 9–14. ISSN 1313-1842.
Search in Google Scholar Back to article
Książkiewicz, A., Dombek, G., Nowak, K. (2019). Change in electric contact resistance of low-voltage relays affected by fault current. Materials, 12 (13), 2166. https://doi.org/10.3390/ma12132166
Search in Google Scholar Back to article
McBride, J. W. (2008). The relationship between surface wear and contact resistance during the fretting of in-vivo electrical contacts. IEEE Transactions on Components and Packaging Technologies, 31 (3), 592–600. https://doi.org/10.1109/TCAPT.2008.2001162
Search in Google Scholar Back to article
Adams, G. G., Nosonovsky, M. (2000). Contact modeling — forces. Tribology International, 33 (5-6), 431–442. https://doi.org/10.1016/S0301-679X(00)00063-3
Search in Google Scholar Back to article
Li, Y.-H., Shen, F., Ke, L.-L. (2022). Multi-physics electrical contact analysis considering the electrical resistance and Joule heating. International Journal of Solids and Structures, 256, 111975. https://doi.org/10.1016/j.ijsolstr.2022.111975
Search in Google Scholar Back to article
Cheng, J., Zhao, L., Zhou, X., Ren, T., Jin, S., Xie, T., Liu, P., Peng, Z., Wang, Q. (2023). Research on the characteristic of the electrical contact resistance of strap contacts used in high-voltage bushings. Energies, 16 (12), 4702. https://doi.org/10.3390/en16124702
Search in Google Scholar Back to article
Yu, G.-F., Chiu, Y.-J., Zheng, X., Yuan, Z.-L., Wang, Z.-X. (2021). Contact pressure of high-voltage DC power relay change and life prediction and structure optimization. Advances in Mechanical Engineering, 13 (2). https://doi.org/10.1177/1687814021991666
Search in Google Scholar Back to article
Min, T., Ding, F. (2019). Thermal-electrical coupled simulation analysis of sealed electromagnetic relays. In Proceedings of the 2019 International Conference on Precision Machining, Non-Traditional Machining and Intelligent Manufacturing (PNTIM 2019). Atlantis Press. https://doi.org/10.2991/pntim-19.2019.40
Search in Google Scholar Back to article
Kharin, S. N. (2015). Mathematical models of heat and mass transfer in electrical contacts. In 2015 IEEE 61st Holm Conference on Electrical Contacts (HOLM). IEEE. https://doi.org/10.1109/HOLM.2015.7354949
Search in Google Scholar Back to article
Relpor S.A. RM84, RM85, RM87 sensitive - miniature relays [datasheet]. https://www.mouser.pl/datasheet/2/16/RM84_RM85_RM87-612793.pdf
Search in Google Scholar Back to article
FLIR Systems, Inc. (2014). Technical data FLIR E50. https://docs.rs-online.com/ca3e/0900766b81371810.pdf
Search in Google Scholar Back to article
Bao, L., Qi, X.-W., Mei, R.-B., Zhang, X., Li, G.-L. (2018). Investigation and modelling of work roll temperature in induction heating by finite element method. Journal of the Southern African Institute of Mining and Metallurgy, 118 (7), 735–743. https://doi.org/10.17159/2411-9717/2018/v118n7a7
Search in Google Scholar Back to article
Staton, D. A., Cavagnino, A. (2008). Convection heat transfer and flow calculations suitable for electric machines thermal models. IEEE Transactions on Industrial Electronics, 55 (10), 3509–3516. https://doi.org/10.1109/TIE.2008.922604
Search in Google Scholar Back to article
Dziarski, K., Hulewicz, A., Dombek, G., Drużyński, Ł. (2022). Indirect thermographic temperature measurement of a power-rectifying diode die. Energies, 15 (9), 3203. https://doi.org/10.3390/en15093203
Search in Google Scholar Back to article
Yusuf, A., Ballikaya, S. (2021). Thermal resistance analysis of trapezoidal concentrated photovoltaic – Thermoelectric systems. Energy Conversion and Management, 250, 114908. https://doi.org/10.1016/j.enconman.2021.114908
Search in Google Scholar Back to article
Ghahfarokhi, P. S., Kallaste, A., Vaimann, T., Rassolkin, A., Belahcen, A. (2017). Determination of forced convection coefficient over a flat side of coil. In 2017 IEEE 58th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON). IEEE. https://doi.org/10.1109/RTUCON.2017.8124759
Search in Google Scholar Back to article

Indirect Thermographic Measurement of the Contact Temperature of an Electromechanical Relay

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