NDLI: Developments relating to litz wire in the insulation systems of generators for renewable energies

Content Provider	IEEE Xplore Digital Library
Author	Chapman, M. Kaffenberger, T. Matveev, A. Olsen, P.K.
Copyright Year	2011
Description	Author affiliation: SmartMotor AS, Jarleveien 8, 7041, Trondheim, Norway (Matveev, A.; Olsen, P.K.) \|\| Von Roll Holding Ltd, Steinacherstrasse 101, 8804 Au ZH, Switzerland (Chapman, M.) \|\| Von Roll Switzerland Ltd, Passwangstrasse 20, 4226 Breitenbach, Switzerland (Kaffenberger, T.)
Abstract	As new designs for generators applied in the renewable energy market appear and rated power continues to increase, litz-wire winding technology has brought its advantages to machine and process efficiency. The division into many strands increases flexibility, facilitating the processing of larger and special windings, and reduces high-frequency winding resistance, reducing losses. The use of litz wire, however, impacts the insulation system. The litz-wire profile locally enhances electric field strength, with implications for the mainwall and turn insulations. Conductor mica tape can provide appropriate turn insulation, but influences wire flexibility, coil consolidation, and finally resin penetration during impregnation. During vacuum-pressure impregnation, resin should penetrate both the region between turns and the litz wire itself, without draining during curing. This can impose new requirements on the impregnation process and on the choice of resin, which must deal with low pressure and lack of catalyst inside the litz wire. The paper reports on considerations and investigations of such aspects in real generator designs.
Starting Page	27
Ending Page	31
File Size	1635710
Page Count	5
File Format	PDF
ISBN	9781457702785
e-ISBN	9781457702792
e-ISBN	9781457702778
DOI	10.1109/EIC.2011.5996109
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wires Insulation Resins Windings Coils Conductors Generators
Content Type	Text
Resource Type	Article

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