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Additional Loss Caused by Drive Cycle Load Transients in Permanent Magnet Traction Motors

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The additional losses caused by current amplitude transient is analyzed in case of a permanent magnet traction motor. The finite element method is used to define the permanent magnet eddy current losses as well as the rotor and stator iron core losses. The current is varied both in direct- and quadrature axis directions. The losses are determined with several current amplitude rise times and compared with the losses during operation with constant amplitude sinusoidal current.
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Iron loss, Permanent magnet machines, Traction motors

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