DocumentCode
747986
Title
Calculation of Circulating Bearing Currents in Machines of Inverter-Based Drive Systems
Author
Muetze, Annette ; Binder, Andreas
Author_Institution
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI
Volume
54
Issue
2
fYear
2007
fDate
4/1/2007 12:00:00 AM
Firstpage
932
Lastpage
938
Abstract
The high-frequency circulating bearing current that may occur in machines of inverter-based drive systems can be described by an eddy-current model. The parameters of an equivalent circuit are derived from the model. The ratio between bearing current and common-mode current amplitudes for different machines is calculated. The theoretical maximum ratio is about 0.35. Copper loops applied for bearing current measurement may decrease the circulating bearing currents up to almost 40%
Keywords
eddy currents; electric current measurement; variable speed drives; bearing current calculation; common-mode current; eddy-current model; inverter-based drive systems; Current measurement; Equivalent circuits; Induction motors; Inverters; Lamination; Magnetic flux; Magnetic separation; Shafts; Stator windings; Voltage; Common-mode voltage; inverter-induced circulating bearing currents; variable-speed drives;
fLanguage
English
Journal_Title
Industrial Electronics, IEEE Transactions on
Publisher
ieee
ISSN
0278-0046
Type
jour
DOI
10.1109/TIE.2007.892001
Filename
4135424
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