Axial Magnetic Fields at the Ends of a Synchronous Generator at Different Points of Operation
2015 (English)In: IEEE transactions on magnetics, ISSN 0018-9464, E-ISSN 1941-0069, Vol. 51, no 2, 8100208Article in journal (Refereed) Published
Axial magnetic fields leaking out at the ends of a conventional rotating synchronous machine cause losses. Therefore, it is important to be able to predict the axial magnetic fields. A linear steady-state model for the axial magnetic flux density phasor in the end regions of non-salient synchronous generators has previously been verified experimentally. This paper describes an extension of the model to salient pole synchronous generators and a method for calculating the coefficients. Experiments and 3-D finite element simulations justify a distinction between axial flux density contributions from the d and q components of the stator current. How the coefficients and the axial magnetic fields in the ends of a small synchronous generator change with steady-state operation conditions is here shown with measurements and to some extent with 3-D finite element simulations.
Place, publisher, year, edition, pages
2015. Vol. 51, no 2, 8100208
Axial magnetic flux, hydropower generator, operation conditions
Physical Sciences Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:uu:diva-255312DOI: 10.1109/TMAG.2014.2347269ISI: 000353595800015OAI: oai:DiVA.org:uu-255312DiVA: diva2:822414