Optimising the high frequency bandwidth and immuntity to interference of Rogowski coils in measurement applications with large local dV/dt

Electrostatic interference through capacitive coupling onto a Rogowski coil causes unwanted pick-up noise on the output of the integrator. An electrostatic screen fitted to a Rogowski coil reduces this interference. This paper discusses how to maximise the high frequency (hf) bandwidth of a Rogowski transducer with a screened coil.

[1]  C.R. Hewson,et al.  High frequency effects in current measurement using Rogowski coils , 2005, 2005 European Conference on Power Electronics and Applications.

[2]  C.R. Hewson,et al.  Verification of Rogowski current transducer's ability to measure fast switching transients , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[3]  C. Hewson,et al.  The effect of electrostatic screening of Rogowski coils designed for wide-bandwidth current measurement in power electronic applications , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[4]  J Cooper,et al.  On the high-frequency response of a Rogowski coil , 1963 .

[5]  V. Nassisi,et al.  Rogowski coils: theory and experimental results. , 1979, The Review of scientific instruments.

[6]  W. F. Ray,et al.  High performance Rogowski current transducers , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).