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Publikācija: Direct-Drive Synchronous Generators with Excitation from Strontium–Ferrite Magnets: Efficiency Improvement

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Direct-Drive Synchronous Generators with Excitation from Strontium–Ferrite Magnets: Efficiency Improvement
Field of research 2. Engineering and technology
Sub-field of research 2.7 Environmental engineering and energetics
Authors Alberts Serebrjakovs
Nikolajs Levins
Alvis Sokolovs
Keywords wind generator, permanent magnets, bevel teeth, pole over-lapping
Abstract The authors consider the possibility to raise the specific power of synchronous generators with excitation from inexpensive permanent magnets. For this purpose, it is proposed to use tooth-wise windings and permanent magnets based on inexpensive magneto-hard material, e.g. strontium-ferrite. The magnets are to be placed between the rotor teeth, the alternate polarity of which is facing the air-gap. This provides a simpler and cheaper technology of making such a generator and improves its reliability. The proposed rational bevelling of the stator teeth not only raises the specific power of the generator but also reduces the level of noise and vibrations, extends the longevity of the magnets and bearings as well as facilitates the starting torque of the electric machine, e.g. if it is employed as wind generator.
DOI: 10.2478/v10047-012-0018-0
Hyperlink: http://www.degruyter.com/view/j/lpts.2012.49.issue-4/v10047-012-0018-0/v10047-012-0018-0.xml?format=INT 
Reference Serebrjakovs, A., Levins, N., Sokolovs, A. Direct-Drive Synchronous Generators with Excitation from Strontium–Ferrite Magnets: Efficiency Improvement. Latvian Journal of Physics and Technical Sciences, 2012, Vol.49, No.4, pp.3-13. ISSN 0868-8257. Available from: doi:10.2478/v10047-012-0018-0
Additional information Citation count:
ID 17741