Muetze, Annette and Oh, H. William. (2008) Application of static charge dissipation to mitigate electric discharge bearing currents. IEEE Transactions on Industry Applications, Vol.44 (No.1). pp. 135-143. ISSN 0093-9994

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Abstract

Today, the physical cause-and-effect chains of inverter-induced high-frequency bearing currents have been well understood, but little has been known on not only theoretically possible, but also cost-effective mitigation techniques for a certain drive configuration. This paper focuses on the mitigation of discharge bearing currents, which occur predominantly with smaller motors of up to several kilowatts. We present a new mitigation technique where any voltage build-up across the bearing is discharged via static charge dissipation through a parallel path before an electric breakdown inside the bearing occurs. The technique is based on the field emission effect, has ultralow friction and negligible wear, and is very robust toward contamination, when compared with conventional carbon-based brushes.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Bearings (Machinery), Breakdown (Electricity), Electric fields, Variable speed drives, Electromotive force
Journal or Publication Title:	IEEE Transactions on Industry Applications
Publisher:	IEEE
ISSN:	0093-9994
Date:	January 2008
Volume:	Vol.44
Number:	No.1
Number of Pages:	9
Page Range:	pp. 135-143
Identification Number:	10.1109/TIA.2007.912758
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Description:	Presented at the 2007 IEEE International Electric Machines and Drives Conference, Antalya, Turkey,May 3–5
Type of Event:	Conference
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URI:	http://wrap.warwick.ac.uk/id/eprint/30625

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