RTU Research Information System
Latviešu English

Publikācija: Eccentricity of Slow-Speed Salient-Pole Generator: Analysis based on Air Gap Spectrum

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Eccentricity of Slow-Speed Salient-Pole Generator: Analysis based on Air Gap Spectrum
Field of research 2. Engineering and technology
Sub-field of research 2.3 Mechanical engineering
Authors Marina Čerpinska
Rihards Elmanis-Helmanis
Keywords air gap, slow-speed generator, air gap spectrum
Abstract The air gap monitoring and fault diagnosis is exemplified for a slowspeed salient-pole generator of hydropower unit. Three types of measurements, namely, with contacting probes, non-contacting sensors and non-invasive sensors are discussed. For the case study non-contacting sensors were applied, with the results demonstrated. In the paper, different methods for evaluation of the results (e.g. using delta value and air gap variation criteria, graphical and spectrum analysis) are described and compared. It has been shown that the spectrum analysis describes changes in the eccentricity better than the criterion method, and is expected to supplement the graphical analysis in the future. Finally, the limitations of the spectrum analysis are formulated, and criteria for this type analysis are proposed.
DOI: 10.1515/lpts-2015-0003
Hyperlink: http://www.degruyter.com/view/j/lpts.2015.52.issue-1/lpts-2015-0003/lpts-2015-0003.xml?format=INT 
Reference Griščenko, M., Elmanis-Helmanis, R. Eccentricity of Slow-Speed Salient-Pole Generator: Analysis based on Air Gap Spectrum. Latvian Journal of Physics and Technical Sciences, 2015, Vol.52, Iss.1, pp.26-37. e-ISSN 0868-8257. Available from: doi:10.1515/lpts-2015-0003
Additional information Citation count:
ID 20119