NDLI: Analysis of rotary transformer concepts for high-speed applications

Content Provider	IEEE Xplore Digital Library
Author	Bortis, D. Fassler, L. Looser, A. Kolar, J.W.
Copyright Year	2013
Description	Author affiliation: Power Electron. Syst. Lab., ETH Zurich, Zurich, Switzerland (Bortis, D.; Fassler, L.; Looser, A.; Kolar, J.W.)
Abstract	In many applications electrical energy has to be transferred to rotating parts. Usually a cylindrical transformer with a rotating and a stationary part is used, which are separated by a small air gap. In order to achieve a high magnetic coupling, on both parts a highly permeable core material is employed. In high-speed applications the diameter of the rotary transformer should be small since the mechanical stresses can be high. Therefore, a high electrical frequency has to be selected. This high switching frequency would result in high core losses; ferrite would be the best suited material. However, ferrite is brittle and has a limited mechanical strength. Therefore, in this paper two concepts of rotary transformers are analyzed, where no core material is used on the rotating part. The major advantage of these concepts is a simple and mechanically robust design with a lightweight construction resulting in very small unbalanced mass.
Sponsorship	IEEE Power Electron. Soc.
Starting Page	3262
Ending Page	3269
File Size	978590
Page Count	8
File Format	PDF
ISBN	9781467343541
ISSN	10482334
e-ISBN	9781467343558
e-ISBN	9781467343534
DOI	10.1109/APEC.2013.6520768
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-03-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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