Sources of harmonic currents in slip-ring induction motors

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Sources of harmonic currents in slip-ring induction motors

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Several features which could cause an unsaturated 3-phase induction motor to draw nonsinusoidal currents from a supply of negligible harmonic content are examined. An analysis is developed which provides a simple method for the prediction of the harmonic-current magnitudes and frequencies. A comparison of predicted and measured current harmonics is presented to substantiate the theory.

Inspec keywords: harmonic analysis; induction motors

Other keywords: sources of harmonic currents; three phase; slip ring induction motors; nonsinusoidal currents

Subjects: Asynchronous machines

References

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      • K. Oberretl . Field-harmonic theory of slip-ring motor taking multiple armature reaction into account. Proc. IEE , 8 , 1667 - 1674
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      • K. Oberretl . Interference in ripple control of power plants due to asynchronous motors. Bull. Schweiz. Electrotech. Verein , 453 - 463
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      • T.H. Barton , J.C. Dunfield . M.M.F.-harmonic effects in induction motors with phase-wound rotors. Proc. IEE , 6 , 965 - 972
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      • K. Oberretl . 13 rules to minimise stray-load losses in induction motors. Bull. Oerlikon , 1 - 11
    5. 5)
      • R.B. Robinson . Inductance coefficients of rotating machines expressed in terms of winding space harmonics. Proc. IEE , 4 , 769 - 774
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      • H. Vickers . (1953) , The induction motor.
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      • C.V. Jones . (1967) , The unified theory of electrical machines.
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