NDLI: Consideration of design and operation on rotational flux density distributions in hydro generator stators

Content Provider	IEEE Xplore Digital Library
Author	Akiror, J.C. Merkhouf, A. Hudon, C. Pillay, P.
Copyright Year	2014
Abstract	Core losses in an electrical machine vary depending on the type of material, frequency and flux density. Loss prediction using pulsating models is insufficient for estimating core losses in a machine since it does not take into account rotational core losses. Moreover the superposition of pulsating losses in the radial and tangential direction overestimates losses especially at higher flux densities. The objective of this paper is to study the rotational flux density distribution in the stator of a generator under different operating conditions. The distribution of rotational flux in a large hydro generator stator is studied by plotting the aspect ratio. It was found that increasing the yoke length increases the area experiencing rotational flux. Varying the air gap and output power showed slight changes in the rotational flux distribution. However they have an effect on the flux magnitude and harmonics which potentially increase the total losses. Dimensions and operating conditions of the machine therefore affect the total core losses.
Sponsorship	IEEE
Starting Page	93
Ending Page	99
File Size	1245528
Page Count	7
File Format	PDF
ISBN	9781479943890
DOI	10.1109/ICELMACH.2014.6960164
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-02
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computational modeling Core loss Core losses Stators hydro generators Harmonic analysis Rotational flux Loss measurement Generators Mathematical model
Content Type	Text
Resource Type	Article

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Consideration of Design and Operation on Rotational Flux Density Distributions in Hydrogenerator Stators

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Consideration of design and operation on rotational flux density distributions in hydro generator stators

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