Effects of finite length in solid-rotor induction machines
作者:
H.Yee,
期刊:
Proceedings of the Institution of Electrical Engineers
(IET Available online 1971)
卷期:
Volume 118,
issue 8
页码: 1025-1033
年代: 1971
DOI:10.1049/piee.1971.0204
出版商: IEE
数据来源: IET
摘要:
The author presents an analytical solution of Maxwell's equations for the fields in a finite-length, solid-rotor induction motor in which the rotor is not fitted with conducting endrings. It has been assumed as a boundary condition that zero flux enters the ends of the rotor; this is borne out by tests on a typical machine. The solutions for the field distributions are approximate only, but the approximations are good over a wide range of slip. A major advantage of the solutions is that they are expressed in closed, rather than series, form. It is shown that the field distributions and the equivalent-circuit impedances may be considerably different from those obtained by ignoring finite-length effects. Some simple criteria are derived to assess the importance of finite-length effects on machine impedances. The analysis is carried out ignoring rotor saturation and slotting.
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