Induction Coils for Measuring Low Frequency and Low Intensity Magnetic Fields

  • Saša Milić Elektrotehnički institut Nikola Tesla

Abstract


Short air core induction coils with a large radius and a large number of turns can be successfully used as induction sensors for detecting low-intensity quasistationary magnetic fields, such as magnetic fields of ships. The application of these sensors is presented in detail, and then a practical methodology for determining all the necessary parameters of the sensor is proposed. The sensitivity of sensors with real numbers is determined and inductance is calculated in several ways. The practical results of ship’s magnetism measurement and the calculation of all parameters of the coil are presented. A comparative analysis of all results was performed and the observed deviations were thoroughly commented on.

References

[1] Measurement, Instrumentation and Sensors, J. G. Webster, Ed. Boca Raton: CRC & IEEE Press, 1999.
[2] B. Popović, Osnovi elektrotehnike 2, Građevinska knjiga, Beograd, 1978, strane: 21, 22.
[3] James C. Maxwell, Electricity and Magnetism, vols. 1 and 2, reprinted in Dover Publications, 1954.
[4] M. T. Thompson, “Inductance Calculation Techniques --- Part II: Approximations and Handbook Methods”, Power Control and Intelligent Motion, Dec. 1999, pages: 1-11.
[5] F. W. Grover, Inductance Calulations: Working Formulas and Tables, Dover Publications, Inc., New York, 1946.
[6] R. Lundin, "A handbook formula for the inductance of a single-layer circular coil", Proceedings of the IEEE, vol. 73, issue 9, 1985., pages: 1428-1429.
[7] Morgan Brooks, Inductance of Coils, University of Illinois at Urbana-Champaign, Production Note, 2007.
[8] Formule i on-line kalkulatori za računanje induktansi, dostupno na sajtu:
http://www.pulsedpower.eu/toolbox/toolbox_inductances.html#inductances
Published
2020/12/25
Section
Professional Paper