Rogowski Coil with Ferromagnetic Powder Core
Type of document
článek v časopisejournal article
Peer-reviewed
submittedVersion
Author
Grim V.
Ripka P.
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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.
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