Influence of Rogowski coil structure for sub-ns current pulses

Area of Science:

• Electrical Engineering
• Physics
• Biomedical Engineering

Background:

• Short current pulses are crucial in electronic devices and biological stress applications.
• Rogowski coils are standard tools for measuring these current pulses.
• The Rogowski coil's slit is essential for directing the current but its influence on calibration was unstudied.

Purpose of the Study:

• To analyze the impact of Rogowski coil slit dimensions (length and width) on calibration factor variations.
• To develop a Rogowski coil system capable of precise sub-nanosecond pulse measurements.

Main Methods:

• Theoretical analysis of Rogowski coil parameters including inductance, load resistance, and capacitance.
• Experimental investigation of slit dimensions' effect on the attenuation coefficient.
• Fabrication and testing of a novel Rogowski coil device.

Main Results:

• The slit dimensions significantly influence the Rogowski coil's attenuation coefficient.
• Attenuation factor varied from 11.3 to 16.3 A/V as slit width changed from 0.8 to 0.2 mm.
• The developed device achieved precise measurements of pulses with approximately 100 ps rise times.

Conclusions:

• Slit geometry is a critical factor in Rogowski coil calibration and performance.
• Understanding slit influence allows for improved accuracy in measuring fast current pulses.
• The novel Rogowski coil design facilitates high-precision diagnostics for demanding electronic applications.