TY  - JOUR
T1  - Rogowski Coils with Nickel Alloy Flexible Core and Peroformance Comparisons
TT  - Nikel Alaşımlı Esnek Nüveye Sahip Rogowski Bobinler ve Performans Karşılaştırmaları
AU  - Yıldırız, Emin
AU  - Aydin, Gizem Merve
PY  - 2025
DA  - October
Y2  - 2025
DO  - 10.29130/dubited.1650136
JF  - Duzce University Journal of Science and Technology
JO  - DÜBİTED
PB  - Duzce University
WT  - DergiPark
SN  - 2148-2446
SP  - 1601
EP  - 1611
VL  - 13
IS  - 4
LA  - en
AB  - The instantaneous currents must be measured precisely and accurately in order to monitor electrical circuits under different operating conditions. Rogowski Coils (RC) can be easily connected even in narrow spaces where the measuring device cannot enter. They perform current measurement using the secondary voltages produced at a few mV levels even at the nominal currents (3000 - 60000 A). Therefore, it is difficult to make measurements with RCs, especially at low current values such as a few ten amperes, and the results are prone to the measurement errors. In order to increase the measurement sensitivity without changing the physical dimensions of the RC, a magnetic-core structure can be preferred instead of an air-core. In this paper, the magnetic filaments have been produced using nickel alloys at different ratios (40% and 60%). Flexible magnetic-core RCs have been developed by winding the magnetic filaments. Considering the flexibility of the core, the magnetic filaments have been produced in two different alloy ratios. The relative permeabilities of the developed magnetic filaments have been determined by experimental studies and their linear characteristics in the range of 5-400 A have been verified by finite element analysis.
KW  - Rogowski Coil
KW  - Flexible Magnetic Core
KW  - Current Measurement
N2  - Elektriksel devrelerin farklı çalışma koşullarında takibi için anlık akımların hassas ve doğru şekilde ölçülmesi gerekir. Geleneksel Rogowski Bobinleri (RB) hava nüveli olduklarından, akım transformatörleri gibi doyum problemleri yaşamazlar. Esnek oldukları için ölçü aletinin giremediği dar alanlarda dahi kolayca bağlanabilirler ve ölçüm yapabilirler. Bu üstünlüklerine karşın nominal akım değerlerinde dahi birkaç mV seviyesinde üretilen sekonder gerilimleri kullanılarak akım ölçümü gerçekleştirirler. Bu nedenle özellikle düşük akım değerlerinde RB ile ölçüm yapmak zordur ve sonuçlar ölçüm hatalarına açıktır. Düşük genlikte ve frekansta akım ölçümlerinde, uygun RB tasarımı ve indikatör seçimi kritiktir. RB tasarımında; iç kesit alanının büyüklüğü ve şekli ile iç ve dış çap gibi fiziksel boyutlar dikkate alınır. Ancak kullanım yerleri fiziksel boyutları da kısıtlayabilir. Fiziksel boyutlarını değiştirmeden RB’in ölçüm etkinliğini arttırmak için, hava-nüveli yapıdan manyetik nüveli yapıya geçiş yapılmalıdır.  Bu çalışmada farklı oranlarda Nikel alaşımlar kullanılarak manyetik filamentler üretilmiştir. Manyetik filamentlerin sarılması ile esnek manyetik nüveli RB’ler geliştirilmiştir. Nüvenin esnekliği de dikkate alınarak, iki farklı alaşımlı manyetik filament üretilmiştir. Geliştirilen manyetik filamentlerin bağıl geçirgenlikleri, deneysel çalışmalarla belirlenmiş ve sonlu elemanlar analizi ile 5-400 A aralığında lineer karakteristikleri doğrulanmıştır.
CR  - Accuenergy. (2025, February 25). AcuCT Flex Series Rogowski Coil CT datasheet. https://accucdn.accuenergy.com/wp-content/uploads/acuct-flex-series-rogowski-coil-ct-datasheet.pdf
CR  - Al-Sowayan, S. (2014). Improved mutual inductance of Rogowski coil using hexagonal core. World Academy of Science, Engineering and Technology International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering, 8(2), 293-296.
CR  - Anigi, E., Karacasu, Ö., & Hocaoğlu, M. H. (2012, November 29 – December 1). Ölçü akım transformatörlerinin doğruluğunun sinüzoidal olmayan şartlar altında deneysel incelenmesi, In Proceedings of ELECO 2012 Elektrik - Elektronik ve Bilgisayar Mühendisliği Sempozyumu (pp. 148-152). Bursa Türkiye.
CR  - Bawankule, P., & Chandrasekaran, K. (2022, October 7-9). Rogowski coil with an active integrator for impulse current measurement. In Proceedings of the 2022 IEEE 3rd Global Conference for Advancement in Technology (GCAT) (pp. 1–6). Bangalore, India.
CR  - Bawankule, P., & Chandrasekaran, K. (2025, January 20-22). Analyzing the Performance of 3D PCB Rogowski Coil in Pulsed Current Measurement Using Finite Element Method. In Proceedings of the 2025 Fourth International Conference on Power, Control and Computing Technologies (ICPC2T) (pp. 1–6). Raipur, India, https://doi.org/10.1109/ICPC2T63847.2025.10958704
CR  - Chen, K. L., & Chen, N. (2010). A new method for power current measurement using a coreless Hall effect current transformer. IEEE Transactions on Instrumentation and Measurement, 60(1), 158-169. https://doi.org/10.1109/TIM.2010.2049234
CR  - Crescentini, M., Syeda, S. F., & Gibiino, G. P. (2021). Hall-effect current sensors: Principles of operation and implementation techniques. IEEE Sensors Journal, 22(11), 10137-10151. https://doi.org/10.1109/JSEN.2021.3119766
Çınar, H., İmal, N., & Şener, E. (2016). Akım ölçü transformatörleri çalışma bölgesi analizi. Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 4(2), 782-790.
CR  - Dubickas, V., & Edin, H. (2007). High-frequency model of the Rogowski coil with a small number of turns. IEEE Transactions on Instrumentation and Measurement, 56(6), 2284-2288. https://doi.org/10.1109/TIM.2007.907965
CR  - Han, R. Y., Wu, J. W., Ding, W. D., Jing, Y., Zhou, H. B., Liu, Q. J., & Qiu, A. C. (2015). Hybrid PCB Rogowski coil for measurement of nanosecond-risetime pulsed current. IEEE Transactions on Plasma Science, 43(10), 3555-3561. https://doi.org/10.1109/TPS.2015.2415517
CR  - Hlavacek, J., Prochazka, R., Draxler, K., & Kvasnicka, V. (2008, September 22-24). The Rogowski coil design software. In Proceedings of the16th IMEKO TC4 International Symposium. Florence, Italy.
CR  - Kang, J., Zhu, A., Chen, Y., Luo, H., Yao, L., & Xin, Z. (2023). An online gate oxide degradation monitoring method for SiC MOSFETs with contactless PCB Rogowski coil approach. IEEE Transactions on Power Electronics, 38(8), 9673-9684. https://doi.org/10.1109/TPEL.2023.3270820
CR  - Liu, Y., Lin, F., Zhang, Q., & Zhong, H. (2010). Design and construction of a Rogowski coil for measuring wide pulsed current. IEEE Sensors Journal, 11(1), 123-130. https://doi.org/10.1109/JSEN.2010.2052034
CR  - Marracci, M., Tellini, B., & Bertolucci, E. (2017, May). Study and characterization of a Rogowski coil with superparamagnetic magnetite core. In Proceedings of the 2017 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Turin, Italy, https://doi.org/10.1109/I2MTC.2017.7969951
CR  - Nanyan, A. N., Isa, M., Hamid, H. A., Rohani, M. N. K., & Ismail, B. (2018). The Rogowski coil sensor in high current application: A review. IOP Conference Series: Materials Science and Engineering, 318(1), Article 012054. https://doi.org/10.1088/1757-899X/318/1/012054
CR  - Pozo, B., Garate, J. I., Araujo, J. Á., & Ferreiro, S. (2019). Energy harvesting technologies and equivalent electronic structural models. Electronics, 8(5), Article 486. https://doi.org/10.3390/electronics8050486
CR  - Prince, T. J., Riley, E. J., & Miller, S. W. (2021). Additive manufacturing of PLA-based microwave circuit-analog absorbers. IEEE Transactions on Electromagnetic Compatibility, 63(5), 1341-1346. https://doi.org/10.1109/TEMC.2020.3044014
CR  - Ranasingh, S., Pradhan, T., & Raju, D. K. (2022). Contactless current sensor with novel coil designs and Hall-effect based electron device for dynamic precision adjustment. IEEE Sensors Journal, 22(21), 20626-20634. https://doi.org/10.1109/JSEN.2022.3207276
CR  - Samimi, M. H., Mahari, A., Farahnakian, M. A., & Mohseni, H. (2014). The Rogowski coil principles and applications: A review. IEEE Sensors Journal, 15(2), 651-658. https://doi.org/10.1109/JSEN.2014.2362940
CR  - Shafiq, M., Stewart, B. G., Hussain, G. A., Hassan, W., Choudhary, M., & Palo, I. (2022). Design and applications of Rogowski coil sensors for power system measurements: A review. Measurement, 203, Article 112014. https://doi.org/10.1016/j.measurement.2022.112014
CR  - Shang, Y., Li, H., Wang, J., Wu, J., & He, X. (2012, May 28-31). Analysis and design of a current transformer fed power supply from high AC voltage cable. In 2012 IEEE International Symposium on Industrial Electronics, Hangzhou, China, https://doi.org/10.1109/ISIE.2012.6237080
CR  - Shepard, D. E., & Yauch, D. W. (2000). An overview of Rogowski coil current sensing technology (Technical report). LEM High Current Systems.
CR  - Shi, Y., Xin, Z., Loh, P. C., & Blaabjerg, F. (2020). A review of traditional helical to recent miniaturized printed circuit board Rogowski coils for power-electronic applications. IEEE Transactions on Power Electronics, 35(11), 12207-12222. https://doi.org/10.1109/TPEL.2020.2984055
CR  - Takahashi, S., Ogasawara, S., Takemoto, M., Orikawa, K., & Tamate, M. (2019, November 25-28). Experimental evaluation of the relationship between filter inductor impedances and dimensional resonances of MnZn ferrites. In Proceedings of the 2019 IEEE 4th International Future Energy Electronics Conference (IFEEC), Singapore, https://doi.org/10.1109/IFEEC47410.2019.9015169.
CR  - Timsit, R. S. (2008). High speed electronic connector design: A review of electrical and electromagnetic properties of passive contact elements—part 1. IEICE transactions on electronics, 91(8), 1178-1191. https://doi.org/10.1093/ietele/e91-c.8.1178
CR  - Wang, J., Wang, H., Mao, M., & Ma, X. (2024). Analysis and optimization of the stray capacitance of Rogowski coils. Applied Sciences, 14(17), Article 7748. https://doi.org/10.3390/app14177748
CR  - Wei, C., Lin, C., Boyang, M., Yuntao, G., & Shi, Y. (2020, October 18-21). Development of magnetic core framework for flexible Rogowski coil current transducer. In Proceedings of IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, Singapore, https://doi.org/10.1109/IECON43393.2020.9254471
CR  - Xin, Z., Yao, Y., Kang, J., Li, Q., Zhou, Z., & Shi, Y. (2025). A closed-loop compensated Rogowski coil current sensor for three-phase inverter. IEEE Transactions on Power Electronics. 40(1), 2126-2138. https://doi.org/10.1109/TPEL.2024.3464121
CR  - Yu, H., Yuan, J., & Zou, J. (2006). Design of novel structure current transformer with shielding coils for overcoming the saturation of core. IEEE Transactions on Magnetics, 42(4), 1431-1434. https://doi.org/10.1109/TMAG.2006.872478
CR  - Zárybnická, L., Pagáč, M., Ševčík, R., Pokorný, J., & Marek, M. (2023). Effect of topology parameters on physical–mechanical properties of magnetic PLA 3D-printed structures. Magnetochemistry, 9(12), Article 232. https://doi.org/10.3390/magnetochemistry9120232
CR  - Zhan, Y., Feng, G., Wan, J., Li, X., Jin, R., Sun, P., Zhao, Z. & Cui, X. (2024). PCB Rogowski coil array with discrete electrostatic shielding for current measurement of paralleled chips in power devices. IEEE Transactions on Power Electronics, 39(8), 10276-10286. https://doi.org/10.1109/TPEL.2024.3392937
CR  - Zhang, W., Sohid, S. B., Wang, F., Cui, H., & Holzinger, B. (2021). High-bandwidth combinational Rogowski coil for SiC MOSFET power module. IEEE Transactions on power electronics, 37(4), 4397-4405. https://doi.org/10.1109/TPEL.2021.3127545
UR  - https://doi.org/10.29130/dubited.1650136
L1  - https://dergipark.org.tr/en/download/article-file/4655668
ER  -