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Winding Method to Reduce Vibration and Loss Caused by Fractional Slot of Synchronous Machine
Author(s) -
HIRAMATSU DAISUKE,
TSUJIKAWA KAZUMA,
UEDA TAKASHI,
FUJITA MASAFUMI,
ISHIZUKA HIROAKI,
OKUBO MASASHI,
HACHIYA HIDEYUKI,
MORI JUNJI,
NOZAKI DAI,
IWASHITA DAISUKE,
TOKUMASU TADASHI
Publication year - 2017
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22897
Subject(s) - harmonics , electromagnetic coil , stator , waveform , harmonic analysis , vibration , harmonic , voltage , control theory (sociology) , acoustics , computer science , engineering , electronic engineering , physics , electrical engineering , control (management) , artificial intelligence
SUMMARY Fractional‐slot windings are widely used in rotating machines in order to improve the output voltage waveform, increase the design flexibility, and gain many other advantages. However, fractional‐slot windings are known to produce different harmonic components such as an even order and/or fractional number of space flux harmonics compared to integral‐slot windings. These harmonics may increase stray losses and cause stator core vibration. This paper describes an analysis of space flux harmonics and proposes new winding methods such as “novel interspersed windings” to reduce these harmonic components. The proposed winding methods were verified by numerical analysis and model tests.