Browse > Article
http://dx.doi.org/10.4283/JKMS.2016.26.4.137

Non-Contact Current Sensor Fabricated with LC Resonators  

Shin, Kwang-Ho (Department of Information & Communication Engineering, Kyungsung University)
Publication Information
Journal of the Korean Magnetics Society / v.26, no.4, 2016 , pp. 137-141 More about this Journal
Abstract
There is a growing demand for non-contact current measurements for efficient use of electrical power and energy saving. In this study, I propose a non-contact current sensor using LC resonance by a resonance circuit composed of a sensor coil and 2 coupling coils for enabling a wireless measurement. The inductance of the sensor coil, which could be changed by applied current, causes the change of resonance frequency of the resonance circuit. A pair of magnet was attached to the ferrite core to apply a bias magnetic field that enabled the determination of the current direction. We obtained an output voltage change of 18 V with the current of -3~3 A. But, the output was nonlinear. In order to realize the non-contact current measuring method proposed in the present study, there is a need for a strict investigation of linearity and resolution for the future study.
Keywords
non-contact current sensor; ferrite core; resonance frequency;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Bryan Yarborough, Power Electronics Technology (2012) pp. 28-32.
2 S. W. Choi and K. C. Song, J. Korean Society of Safety 22, 20 (2007).
3 H. Okada and T. Itoh, Wireless Sensor Network (2013) pp. 223-228.
4 E. Chobot, D. Newby, R. Chandler, N. Abu-Mulaweh, C. Chen, and C. Pomalaza-Raez, International Journal of Embedded Systems and Applications (IJESA) 3, 1 (2013).
5 A. J. DeRouin, B. D. Pereles, T. M. Sansom, P. Zang, and K. G. Ong, J. Sens. Technol. 3, 63 (2013).   DOI
6 J. Zubia, L. Casado, G. Aldabaldetreku, A. Montero, E. Zubia, and G. Durana, Sensors 13, 13584 (2013).   DOI
7 D. Howard Dellinger, L. E. Whittmore, and R. S. Ould, Radio Instruments and Measurements 248 (1924).