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On the Application of Extended Grounded Slot Electrodes to Reduce Noncirculating Bearing Currents.
- Source :
-
IEEE Transactions on Industrial Electronics . Mar2023, Vol. 70 Issue 3, p2286-2295. 10p. - Publication Year :
- 2023
-
Abstract
- Power-electronic-converter-induced motor bearing currents are a widespread problem in the field of electrical drives. Parasitic capacitances between the electrical machine's parts provide a path for leakage currents, which finally harm metallic ball bearings. Remembering that end-windings have a significant contribution in building up stray capacitances, a countermeasure affecting both the lamination stack and end-winding areas is needed. This article focuses on a countermeasure against the noncirculating bearing currents in the cluster of solutions at the motor side. The electrostatic shielding approach, which is a known principle to reduce capacitive couplings, is applied in electrical machines every now and then. In this article, the principle of slot-embedded grounded electrodes is extended to cover also the end-windings. Thus, the electrodes provide a better shaft-to-ground voltage mitigating effect compared to the case where electrodes are applied only in the lamination stack area. The feasibility and effectiveness of such a countermeasure are investigated. Different options in terms of scaling of both the machine size and diameter of the electrodes were analyzed and corresponding conclusions were pointed out. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRODES
*MACHINE parts
*VARIABLE speed drives
*STRAY currents
*BALL bearings
Subjects
Details
- Language :
- English
- ISSN :
- 02780046
- Volume :
- 70
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industrial Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 160652148
- Full Text :
- https://doi.org/10.1109/TIE.2022.3172748