A simple geomagnetic field compensation system for uniform magnetic field applications

Keywords: Uniform magnetic field, Square Helmholtz coils, Tri-axial Hall effect sensors, Magnetic field control, Geomagnetic field compensation


In this paper a simple geomagnetic field compensation system for uniform magnetic field applications of low magnitude and frequency is presented. The compensation system is based on an array of Tri-axial Square Helmholtz (TSH) coils, an array of tri-axial Hall effect sensors and a microcontroller system in order to compensate the small variations of the ambient magnetic fields (magnitudes close to the geomagnetic field between  25 μT and 65 μT) on a volume of interest. The geomagnetic field experimentally obtained of  39.5 μT was compensated, achieving a uniform magnetic field of approximately zero. Finally, the proposed system emerges as a simple alternative for control and compensation of magnetic fields in several applications.

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Author Biographies

Andrés Fernando Restrepo Álvarez, University of Valle

Industrial Control Research Group, Faculty of Engineering.

Edinson Franco Mejía, University of Valle

Industrial Control Research Group, Faculty of Engineering.

Héctor Cadavid Ramírez, University of Valle

High Voltage Research Group (GRALTA), Faculty of Engineering.

Carlos Rafael Pinedo Jaramillo, University of Valle

Research Group on Perception and Intelligent Systems, Faculty of Engineering.


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How to Cite
Restrepo Álvarez A. F., Franco Mejía E., Cadavid Ramírez H., & Pinedo Jaramillo C. R. (2017). A simple geomagnetic field compensation system for uniform magnetic field applications. Revista Facultad De Ingeniería Universidad De Antioquia, (83), 65-71. https://doi.org/10.17533/udea.redin.n83a09