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

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

doi:10.1109/access.2022.3222773

Cited by 9 publications

(1 citation statement)

References 35 publications

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“…The types of windings used in electric machines has been previously reviewed in [46] and [47]. The three main types of windings discussed in the literature are presented below.…”

Section: Types Of Windings Used In Electric Machinesmentioning

confidence: 99%

AC Losses in Windings: Review and Comparison of Models With Application in Electric Machines

Hajji,

Hlioui,

Louf

et al. 2024

IEEE Access

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Industry is increasingly adopting high-speed electric machines due to their high-power density and low cost. However, increasing the speed leads to many challenges that are worth to study since they have relevant impact on the design of the machine. One of these challenges is the losses in stator winding assembly. At low frequency, losses in windings are usually assumed equal to DC losses. However, at high frequency some phenomena become noticeable and worth evaluating since they lead to noticeable losses. AC losses in windings are due to skin effect, proximity effect, and circulating currents. The main models of AC losses in windings in the literature are presented for both circular and rectangular wires. These models are compared using both interior and surface-mounted permanent magnet synchronous machines. Results show that for proximity effect, analytical model is convenient when considering armature reaction only, however, when considering on load case, hybrid model with simple FEA is suitable thanks to its interesting trade-off between accuracy and computation time, which makes it suitable for large-scale optimization. For circulating currents effect, finite element model is unavoidable. Moreover, two important properties concerning circulating currents are stated as well as their mathematical proofs.INDEX TERMS AC losses in windings, electric machine, circulating currents, high speed, proximity effect, skin effect.

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“…The types of windings used in electric machines has been previously reviewed in [46] and [47]. The three main types of windings discussed in the literature are presented below.…”

Section: Types Of Windings Used In Electric Machinesmentioning

confidence: 99%

AC Losses in Windings: Review and Comparison of Models With Application in Electric Machines

Hajji,

Hlioui,

Louf

et al. 2024

IEEE Access

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Material Engineering of 3D-Printed Silicon Steel Alloys for the Next Generation of Electrical Machines and Sustainable Electromobility

Selema

Beretta

Ibrahim

et al. 2023

Journal of Magnetism and Magnetic Materials

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Optimization of conductors arrangement in slot for alternating current winding losses reduction

Zoubida,

Lyes

2024

COMPEL

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Purpose The purpose of this study is to evaluate and minimize the losses of alternating current (AC) in the winding of electrical machines. AC winding losses are frequently disregarded at low frequencies, but they become a significant concern at high frequencies. This is the situation where applications require a high speed. The most significant applications in this category are electrical propulsion and drive systems. Design/methodology/approach An analytical model is used to predict the AC losses in the winding of electrical machines. The process involves dividing the slot into separate layers and then calculating the AC loss factor for each layer. The model aims to calculate AC losses for two different winding arrangements involving circular conductors. This application focuses on the stator winding of a permanent magnet synchronous motor that is specifically designed for electric vehicles. The model is integrated into an optimization process that makes use of the genetic algorithm method to minimize AC losses resulting from the arrangement of conductors within the slot. Findings This study and its findings demonstrate that the arrangement of the conductors within the slot has a comparable effect on the AC losses in the winding as the machine's geometric and physical properties. The effectiveness of electrical machines depends heavily on optimizing the arrangement of conductors in the slot to minimize AC winding losses. Originality/value The proposed strategy seeks to minimize AC winding losses in high-speed electric machines by providing a cost-effective and precise solution to improve energy efficiency.

show abstract

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

Cited by 9 publications

References 35 publications

AC Losses in Windings: Review and Comparison of Models With Application in Electric Machines

AC Losses in Windings: Review and Comparison of Models With Application in Electric Machines

Material Engineering of 3D-Printed Silicon Steel Alloys for the Next Generation of Electrical Machines and Sustainable Electromobility

Optimization of conductors arrangement in slot for alternating current winding losses reduction

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