Analysis of the critical stresses in high-voltage composite winding insulations under thermal loads
Publikationen: Beitrag in Fachzeitschrift › Übersichtsartikel › (peer-reviewed)
Standard
in: Journal of composite materials, Jahrgang 54.2020, Nr. 15, 21.11.2019, S. 2073-2084.
Publikationen: Beitrag in Fachzeitschrift › Übersichtsartikel › (peer-reviewed)
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS (suitable for import to EndNote) - Download
TY - JOUR
T1 - Analysis of the critical stresses in high-voltage composite winding insulations under thermal loads
AU - Pothukuchi, Harish Kalyan Ram
AU - Fuchs, Peter Filipp
AU - Schuecker, Clara
N1 - Publisher Copyright: © The Author(s) 2019.
PY - 2019/11/21
Y1 - 2019/11/21
N2 - Stator bars are the critical components in generators with respect to their lifespan. The winding insulation may be susceptible to damage under excessive alternating temperature loads incurred by a high number of start–stop cycles and heavy overloads. The differences in thermal expansion between the different components in the multi-layered winding insulation lead to thermal stresses. This work deals with the thermo-mechanical characterisation of the individual constituents of the winding insulation and the finite element model of a stator bar, based on the material data obtained from the tests that enable the identification of the thermal stresses leading to delamination over thermal cycles. The out-of-plane and the interfacial shear stress are found to be in the critical range with respect to the relatively low cohesive strength of the included individual mica layers.
AB - Stator bars are the critical components in generators with respect to their lifespan. The winding insulation may be susceptible to damage under excessive alternating temperature loads incurred by a high number of start–stop cycles and heavy overloads. The differences in thermal expansion between the different components in the multi-layered winding insulation lead to thermal stresses. This work deals with the thermo-mechanical characterisation of the individual constituents of the winding insulation and the finite element model of a stator bar, based on the material data obtained from the tests that enable the identification of the thermal stresses leading to delamination over thermal cycles. The out-of-plane and the interfacial shear stress are found to be in the critical range with respect to the relatively low cohesive strength of the included individual mica layers.
UR - http://www.scopus.com/inward/record.url?scp=85075344324&partnerID=8YFLogxK
U2 - 10.1177/0021998319887779
DO - 10.1177/0021998319887779
M3 - Review article
VL - 54.2020
SP - 2073
EP - 2084
JO - Journal of composite materials
JF - Journal of composite materials
SN - 0021-9983
IS - 15
ER -
