4.5 Article

Design, simulation and fabrication of non-spiral based fluxgate sensor on printed circuit board (PCB)

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ELSEVIER
DOI: 10.1016/j.jmmm.2022.169769

Keywords

Non-spiral coils; Magnetic field strength; Ansys Maxwell's software; Earths field detection

Funding

  1. Centre for Advanced Studies in Electronics Science and Technology
  2. IoE RC4 by UoH, MHRD, Govt of India
  3. TIDE facility centre for fabrication and testing of sensor at University of Hyderabad

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This paper presents the performance characteristics of a non-spiral planar excitation and pick-up micro-coils fluxgate sensor with a NiFe magnetic rod core. The sensor's performance is simulated using Ansys Maxwell's software. A simple and cost-effective fabrication method is implemented using Printed Circuit Board technology. The sensor demonstrates earth magnetic field strength detection.
This paper presents performance characteristics of non-spiral planar excitation and pick-up micro-coils implemented for a fluxgate sensor with a NiFe magnetic rod core. Using Ansys Maxwell's software, the sensor performance is simulated. Magnetic flux [phi], magnetic flux density [B], magnetic field intensity [H], coupling coefficient, inductance [L] and magnetic energy [E] of the coils are simulated for a set of excitation currents. A simple, cost-effective and less complex fabrication method is implemented to fabricate the sensor using Printed Circuit Board (PCB) technology. Non-spiral 5-turn fluxgate sensor of dimensions 50mmx 20mmx 0.5 mm [length x breadth x width] is fabricated and analysed at an excitation current with a fundamental frequency of 500 kHz. Two excitation coils and one pick-up coil are deposited on a horizontal PCB plane and NiFe rod type material is placed on it, which acts as the core. Synthetic glue is spread on the coils; it acts a insulator between the coils and the core. Copper is used for deposition of the both the excitation and pick-up coils. On applying different excitation current, the frequency response of the non-spiral fluxgate sensor is plotted. The sensor demonstrated earth magnetic field strength detection (similar to 25 mu T).

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