Effect of Using Different Types of Magnet Wires on the AC Losses of Electrical Machine Windings

Selema, Ahmed; Ibrahim, Mohamed N.; Sprangers, R. L. J.; Sergeant, Peter

doi:10.1109/iemdc47953.2021.9449507

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…In the conference version of this paper [1], the current density distribution at strand level is investigated for eight layers of a flat copper coil under the same current and frequency level.…”

Section: Current Density At High Frequencymentioning

confidence: 99%

“…For instance, bad selection of wires or even random allocation of conductors inside the slots could cause an excessive amount of losses as well as poor fill factor. Therefore, coil manufacturing with high reliability and economic efficiency is necessary [1].…”

Section: Introductionmentioning

confidence: 99%

“…In these types of machines, high frequency currents, with fundamental frequencies up to 1kHz, or even higher, pass through the conductors resulting in additional losses due to skin and proximity effects. This most likely appears in the open or semi-closed slot geometry, particularly for the conductors near the slot opening because they are exposed to high leakage flux [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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Selection of Magnet Wire Topologies With Reduced AC Losses for the Windings of Electric Drivetrains

et al. 2022

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In high speed electrical machines, one of the main challenges that can be faced is the high frequency losses in the machine windings due to both skin and proximity effects. This paper studies the effect of using different types of magnet wires on the AC losses in the winding of high speed electric machines. Using finite element modelling (FEM), the conductors are subdivided into multiple strands to calculate the losses in each conductor and in each layer. Aiming at loss minimization, different arrangements are introduced and compared at a wide range of frequencies. Further, four coil designs are prototyped using different magnet wires or arrangements. Moreover, the design and performance are compared with highlighting the pros and cons of each case. Eventually, recommendations are provided based on the obtained results for a better selection of magnet wire.

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Section: Current Density At High Frequencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Selection of Magnet Wire Topologies With Reduced AC Losses for the Windings of Electric Drivetrains

et al. 2022

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“…This results in nonuniform current density distribution over the conductor cross-section area. Eventually, the winding apparent resistance increases and additional losses are introduced, which are known as AC winding losses [2][3][4]. The mitigation of the AC losses in the windings is a major challenge.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of High-Frequency Eddy Current Losses in Hairpin Winding Machines

2022

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In high-speed and high-frequency electric machines, one of the major issues that impacts the performance and capability of a machine is the high-frequency eddy current losses in the windings. This work deals with AC winding losses in flat rectangular conductors. Aiming for eddy current loss mitigation, two different materials are investigated and compared for the same winding design, namely copper and aluminum. Using the finite element method (FEM), the conductor loss and current density behavior are simulated at the strand level. Further, in order to verify the simulated losses, the AC losses are measured and compared over a wide range of frequencies. Finally, recommendations are provided based on the obtained measurements to identify the best winding topology that is most suitable for automotive applications.

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