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Effects of asymmetry of induction-machine windings upon the slot leakage reactance

Effects of asymmetry of induction-machine windings upon the slot leakage reactance

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It has been shown recently that asymmetrical fractional-slot windings can be devised to draw balanced currents. The leakage reactance for the three phases of these windings may, however, no longer be equal. The paper discusses the effects of the asymmetry of the windings upon one component of leakage, namely the slot leakage. It is shown that, by careful selection of the coil pitch for the winding, equal slot leakages are possible for the three phases. The paper also suggests how the slot leakage reactance may be determined for other coil pitches.

References

    1. 1)
      • G.A. Battersby . Analysis of asymmetrical induction-motor windings. Proc. IEE , 11
    2. 2)
      • G.H. Rawcliffe , W. Fong . Two-speed induction motors using fractional-slot windings. Proc. IEE , 10
    3. 3)
      • M.G. Say . (1983) , Alternating current machines.
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