GRIM, V. and P. RIPKA. Rogowski Coil with Ferromagnetic Powder Core. IEEE Magnetics Letters. 2022, 13 1-4. ISSN 1949-307X. DOI 10.1109/LMAG.2022.3143470.
We have used nanocrystalline powder to build a core for Rogowski coils suitable for application in energy meters.
The sensor linearity error is 0.32% of full scale (FS) of its 20 A range, which is acceptable for this application. The main
advantages of the new core are 15-fold increase in sensitivity, which results in lower noise, and high rejection of direct
current. It operates at up to 1000 A dc with 20% change in sensitivity. Resulting accuracy of power measurement using a
single-chip digital power meter is 0.22% FS.
