Calculation of end-winding leakage inductance for hairpin winding high power density traction machines using the PEEC method

Silberberger, Marco; Morisco, David Philipp; Rapp, Holger; Möckel, Andreas

doi:10.1109/iemdc47953.2021.9449550

Cited by 1 publication

(1 citation statement)

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“…As inferred in the previous section, the majority of the studies available in literature have focused on the modelling and reduction of AC losses in the active part of machines, while few works have dealt with the end winding regions. In [19] and [20], the end winding leakage inductances are investigated, while in [4] and [21] their cooling is analyzed through oil spray. To the authors' knowledge, only in [22] and [23] the total machine Joule losses are analyzed and the end windings AC losses are considered separately.…”

Section: A Motivation and Aimmentioning

confidence: 99%

On the AC Losses in the End Conductors of Hairpin Windings

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et al. 2022

2022 International Conference on Electrical Machines (ICEM)

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In the last years, several resources have been employed to increase torque and power density values in electrical machines, especially in those intended for transport applications. In this context, the adoption of hairpin conductors is spreading thanks to their inherently high fill factor. Their main drawback is represented by their sensitivity to highfrequency phenomena, which can have a significant impact on the Joule losses and thus on the overall efficiency.While several researches have recently focused on ways to model and reduce such high-frequency losses in the slots, i.e. within the conductors' active sides, a few data are available on their impact in the end winding regions.This work provides an investigation on the AC losses occurring in the end conductors of a hairpin winding traction motor. The losses are determined through 3D finite element simulations for a wide frequency range, and compared against those occurring in the active part of the machine.

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