Influence of rotor skew on cage motor losses

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Influence of rotor skew on cage motor losses

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A technique for calculating the total losses in a skewed induction motor, based upon a multi-slice finite-element model, is presented. The ability of this model to predict the axial variation in flux-density in the motor is initially verified. The model is then used to investigate how skew affects the losses in one induction motor. It is shown that skew alters the balance between the rotor iron loss and high-frequency rotor joule loss in the machine.

Inspec keywords: rotors; losses; finite element analysis; machine theory; squirrel cage motors

Other keywords: rotor skew; high-frequency rotor joule loss; cage motor losses; slotting effects; CO2 emission; acoustic noise; skewed induction motor; induction motor; multi-slice finite-element model; total losses calculation; rotor iron loss; flux-density axial variation prediction; global warming; torque ripple

Subjects: Asynchronous machines; Finite element analysis

References

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      • Gyselinck, J., Vandevelde, L., Melkebeek, J.: `Modelling of electrical machines with skewedslots using the two-dimensional finite element method', Proceedings of international conference on Electrical machines, 1996, 2, p. 125–1302.
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      • Mueller, M.A., Williamson, S., Flack, T.J., Atallah, K., Baholo, B., Howe, D., Mellor, P.H.: `Calculation of iron losses from time-stepped finite-element models ofcage induction machines', Proceedings of 7th IEE conference on Electrical machinesand drives, 1995, Durham, p. 77–81.
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