Design and Performance of a Segmented Stator Permanent Magnet Alternator for Aerospace

Baker, Nick; Smith, Daniel; Kulan, Mehmet C.; Turvey, S.

doi:10.1109/tec.2017.2739201

Cited by 18 publications

(4 citation statements)

References 20 publications

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“…Additional effects of the cut edges were neglected; therefore, this effect was taken into account by the increased segmentation air gap d EM . The detailed FEM model contained the real-world mechanical segmentation air gap d M = 0.01 mm, which was derived from the minimal mechanical tolerance (Baker et al , 2018). The air gap d M was directly included in the geometry of the PMSM, as presented in Figure 3.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…introduction of additional air gaps), and the cut-edge effect is increased (Rens et al , 2016; Balluff et al , 2018; Steentjes et al , 2014; Vandenbossche et al , 2010). These changes also have an impact on iron losses (Rens et al , 2016; Vandenbossche et al , 2010; Vandenbossche et al , 2013; Petrun et al , 2016; Caunes et al , 2020; Soda et al , 2021; Baker et al , 2018). The aim of this paper is to present an in-depth analysis of the influence of stator segmentation on iron losses under comparable excitation conditions.…”

Section: Introductionmentioning

confidence: 99%

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Influence of stator segmentation on iron losses in PMSMs for traction applications

Garmut

Petrun

2022

COMPEL

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Purpose This paper presents a comparative study of different stator-segmentation topologies of a permanent magnet synchronous machine (PMSM) used in traction drives and their effect on iron losses. Using stator segmentation allows one to achieve more significant copper fill factors, resulting in increased power densities and efficiencies. The segmentation of the stators creates additional air gaps and changes the soft magnetic material’s material properties due to the cut edge effect. The aim of this paper is to present an in-depth analysis of the influence of stator segmentation on iron losses. The main goal was to compare various segmentation methods under equal excitation conditions in terms of their influence on iron loss. Design/methodology/approach A transient finite element method analysis combined with an extended iron-loss model was used to evaluate discussed effects on the stator’s iron losses. The workflow to obtain a homogenized airgap length accounting for cut edge effects was established. Findings The paper concludes that the segmentation in most cases slightly decreases the iron losses in the stator because of the overall reduced magnetic flux density B due to the additional air gaps in the magnetic circuit. An increase of the individual components, as well as total power loss, was observed in the Pole Chain segmentation design. In general, segmentation did not change the total iron losses significantly. However, different segmentation methods resulted in the different distortion of the magnetic field and, consequently, in different iron loss compositions. The analysed segmentation methods exhibited different iron loss behaviour with respect to the operation points of the machine. The final finding is that analysed stator segmentations had a negligible influence on the total iron loss. Therefore, applying segmentation is an adequate measure to improve PMSMs as it enables, e.g. increase of the winding fill factor or simplifying the assembly processes, etc. Originality/value The influence of stator segmentation on iron losses was analysed. An in-depth evaluation was performed to determine how the discussed changes influence the individual iron loss components. A workflow was developed to achieve a computationally cheap homogenized model.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of stator segmentation on iron losses in PMSMs for traction applications

Garmut

Petrun

2022

COMPEL

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“…In the last years, different studies have highlighted many advantages of such machines if compared to conventional PMMs with a one-piece stator. In fact, a modular stator core allows to enhance the slot fill factor, to ease the manufacturing process and coil winding and to reduce the end winding and iron wastage [1]- [3]. These advantages are noticeable both in large machines, such as wind and tidal generators [4], [5], as well as in low power and small size PMMs [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

Cogging Torque Suppression of Modular Permanent Magnet Machines Using a Semi-Analytical Approach and Artificial Intelligence

et al. 2023

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“…The cogging torque reduction approach was described using several techniques in earlier publications [8]- [11]. Previous research focused on developing new rotor and stator modifications to lessen or eliminate cogging.…”

Section: Introductionmentioning

confidence: 99%

Investigation on various stator structure towards noise and vibration

Abdullah,

Karim,

Othman

et al. 2023

IJPEDS

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<span lang="EN-US">This research analyses the noise and vibration characteristics of permanent magnet motors (PMM) with the electromagnetic characteristics, with an emphasis on high-speed motor segmented closed slot stator. The interaction between the stator, rotor, and magnets can cause a vibration that results in the loud sound due to the high magnetic energy. Even if there aren't many vibrations to contend with, the fluctuation of motor vibrations causes more serious harm. The studies covered slotted stator, closed slot stator, and segmented with closed slot stator. The objective is to analyze the cogging torque relation towards vibration and the effect of natural frequency at steady-state behavior of the structure. ANSYS finite element analysis (FEA) is used to generate electromagnetic analysis performance whilst ANSYS mechanical used to simulate the modal and harmonic analysis at the stator tooth tips surface to define the structure when </span><span lang="EN-US">the steady-state condition under vibrational stimulation. Anticipation on this work shows, the lowest cogging torque produce less radiated sound. Thus, the result indicates the cogging torque profiles had good agreement with the equivalent radiated power level (ERPL) waterfall diagram.</span>

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Design and Performance of a Segmented Stator Permanent Magnet Alternator for Aerospace

Cited by 18 publications

References 20 publications

Influence of stator segmentation on iron losses in PMSMs for traction applications

Influence of stator segmentation on iron losses in PMSMs for traction applications

Cogging Torque Suppression of Modular Permanent Magnet Machines Using a Semi-Analytical Approach and Artificial Intelligence

Investigation on various stator structure towards noise and vibration

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