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Linear Rogowski coil.

V Nassisi1, D Delle Side1

  • 1Dipartimento di Matematica e Fisica "Ennio De Giorgi," Laboratorio di Elettronica Applicata e Strumentazione, LEAS - Università del Salento and I.N.F.N. Sect. of Lecce, C.P. 193, 73100 Lecce, Italy.

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Researchers developed a linear Rogowski coil for measuring fast current pulses in flat conductors. This novel coil achieves sub-nanosecond rise times, enabling precise diagnostics for radiofrequency applications.

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Area of Science:

  • Electrical Engineering
  • Physics

Background:

  • Fast current pulse measurements are crucial for advanced systems.
  • Traditional Rogowski coils are toroidal, limiting their use with flat conductors.
  • Radiofrequency biophysical stress experiments necessitate new diagnostic tools.

Purpose of the Study:

  • To develop and characterize a linear Rogowski coil for detecting current pulses in flat conductors.
  • To analyze the influence of pulse width, coil parameters, and magnetic properties on measurement accuracy.

Main Methods:

  • Application of transmission line theory to the linear Rogowski coil system.
  • Analysis of coil resistance, magnetic properties, and turn number effects.
  • Experimental validation of the coil's response characteristics.

Main Results:

  • The linear Rogowski coil can record pulses lasting hundreds of nanoseconds.
  • The device exhibits a sub-nanosecond rise time (approximately 100 ps).
  • Pulse fidelity is influenced by magnetic core properties and current distribution.

Conclusions:

  • The developed linear Rogowski coil is suitable for diagnosing fast current pulses in flat transmission lines.
  • Coil inductance, load impedance, and resistance determine the measurable pulse duration.
  • The coil's design offers a significant advancement for radiofrequency and pulsed power applications.