Abstract
A novel shielded double-winding Rogowski coil for measurement of nanosecond current pulses is studied. Theoretic analysis of the proposed coil is carried out, and the attenuation factor(reciprocal of the sensitivity) of the Rogowski coil is acquired. It is found that The proposed coil has an advantage on reducing the interference caused by annular displacement current due to the mirror-symmetry structure. A double-winding coil is developed for discharge current pulse of the high power pulse generator. A compact connector in which sampling resistor with resistance as low as 11.3 Ω could be integrated is also developed. According to calibration of the proposed coil, the calibration attenuation factor conforms to the theoretic result. The proposed coil is utilized for measurement of discharge current pulse of the pulse generator. The test result shows that the proposed coil responds well for rectangular pulses with front times of 4.3 ns.
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