Nine-phase armature windings design, test, and harmonic analysis

A nine-phase armature winding was developed for a large generator. Alternative methods for interconnecting the pole-phase groups were examined. An alternate-pole connection scheme was adopted and a prototype induction motor was constructed to confirm the winding scheme. Since only a three-phase powe...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2005-01, Vol.41 (1), p.299-302
Main Authors: Jordan, H.E., Zowarka, R.C., Pratap, S.B.
Format: Article
Language:English
Subjects:
Air gaps
Applied sciences
Coils (windings)
Design engineering
Exact sciences and technology
Fourier analysis
Harmonic analysis
Harmonics
Induction generators
induction motor
Induction motors
Joints
Magnetism
Motor armatures
nine-phase
Other techniques and industries
Power system harmonics
Power system simulation
Prototypes
Reluctance motors
Synchronous motors
Testing
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Description
Summary:A nine-phase armature winding was developed for a large generator. Alternative methods for interconnecting the pole-phase groups were examined. An alternate-pole connection scheme was adopted and a prototype induction motor was constructed to confirm the winding scheme. Since only a three-phase power source was available for testing, the induction motor was tested by using three, three-phase winding sections, one at a time. Air-gap harmonic fields produced some unusual results. These test results and harmonic analyses to explain them are presented herein. The tests confirmed the nine-phase winding scheme that was adopted. The harmonic analyses revealed that the complete nine-phase winding exhibited a very low harmonic content, a distinct advantage of a nine-phase winding for future applications.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2004.839288