Impact of Static Air-Gap Eccentricity on Thermal Responses of Stator Winding Insulation in Synchronous Generators

Yu Ling He, Kai Sun, Yu Wu, Haisen Zhao, Xiao Long Wang, Chris Gerada, David Gerada

Research output: Journal PublicationArticlepeer-review

1 Citation (Scopus)

Abstract

This paper presents a comprehensive analysis on the thermal response characteristics of stator winding insulation under static air-gap eccentricity (SAGE) conditions in synchronous generators. Differently from previous studies, this paper not only takes into account the interactions of both the core loss caused heat and the copper loss caused heat, but also investigates the thermal degrading distribution regularities due to SAGE. The whole work is based on the qualitatively theoretical analysis, the finite element analysis (FEA), and the experimental validation on a non-salient synchronous generator. The study shows that SAGE will significantly make the temperature rise, resulting in uneven temperature distribution and intensifying the thermal responses such as the thermal deformations, stresses, and strains, of the insulation. The nose part and the joint between the line winding and the end winding on the smaller air-gap side are the two most dangerous positions.

Original languageEnglish
JournalIEEE Transactions on Industrial Electronics
DOIs
Publication statusAccepted/In press - 2021
Externally publishedYes

Keywords

  • Air gaps
  • Copper
  • Core loss
  • Insulation
  • static air-gap eccentricity
  • Stator cores
  • stator winding insulation
  • Stator windings
  • Synchronous generator
  • thermal response
  • Windings

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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