Soft magnetic material degradation due to manufacturing process: A comparison of measurements and numerical simulations

Pfingsten, Georg von; Steentjes, Simon; Thul, Andreas; Herold, Thomas; Hameyer, Kay

doi:10.1109/icems.2014.7013817

Cited by 12 publications

(6 citation statements)

References 19 publications

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“…We can observe that the difference between BH is not significant but specific losses for second sample are much higher. This confirms the statement already known from the literature [1,[29][30][31][32][33] that laser cutting increases losses in the core material. A similar phenomenon is observed when cutting EDM or mechanical, but it is not so pronounced.…”

Section: Impact Of Toroidal Sample Dimensions On the Magnetization Cusupporting

confidence: 91%

Impact of Core Sheet Cutting Method on Parameters of Induction Motors

et al. 2020

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The method of cutting motor core sheets causes a change in their magnetic properties and core losses, especially additional losses. Reducing motor losses is very important because of the fulfillment of increasingly stringent requirements set by international regulations for reducing electricity consumption. Due to fact that more and more often induction motors are supplied with high-frequency voltage, core losses are beginning to play a dominant role in the motor’s loss balance. That is why accurate determination of these losses is very important and cutting has a significant impact on them. This report shows how the method of cutting sheet metal affects losses in the finished induction motor working in a wide frequency range. The paper presents the impact of various motor core fabrication technologies on its operational parameters and an approximate way of including this impact in analytical calculations at the design stage of new machine designs, as it is necessary to use sheet metal cutting technologies such as laser or electrical discharge machining (EDM) at the prototype stage. The proposed method is based on measurements of sheet parameters made on toroidal samples with appropriately selected dimensions, so that the width of the sample corresponds to the average width of the motor core elements.

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Section: Impact Of Toroidal Sample Dimensions On the Magnetization Cusupporting

confidence: 91%

Impact of Core Sheet Cutting Method on Parameters of Induction Motors

et al. 2020

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“…In practice, a two-subregion model is used, i.e., containing a damaged fragment with homogeneous material properties and the remaining part that is undamaged. As these examples show, even a simplified approach guarantees the achievement of acceptable accuracy of the results obtained [22,27,32,33]. The herein presented paper uses a different approach, using a homogeneous material with its characteristics depending on the current width of selected subregions.…”

Section: Application Of Results Obtained From the Spice Model To Syrm...mentioning

confidence: 96%

“…Another group of researchers tried to find a proper relationship concerning change in iron loss, suggesting modified classical dependence [27]…”

Section: Mathematical Model Describing Changes In Properties Of Mater...mentioning

confidence: 99%

Impact of a Punching Process on the SyRM Iron Loss: SPICE Model as an Effective Tool for Iron Loss Modeling

Gmyrek¹

2021

Energies

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Many technologies for cutting the magnetic laminations, from which electric motors cores are built, change material properties, among which are magnetizability and iron loss, thus affecting the motor parameters such as motor efficiency. This problem is particularly important for low-power motors, in which the dimensions of the magnetic circuit elements are relatively small. The correct estimation of the motor efficiency is important as early as at its design stage. This is possible when the correct material characteristics are used. This knowledge and analytical model enabling fast estimation of material properties (depending on the actual size) are necessary for engineers, who design electrical motors by analyzing many solution variants in a short time. The author proposes an analytical model of changing material properties, implemented in SPICE software. Its effectiveness was compared with measurement results while being a competitive solution in relation to other analytical models. The proposed SPICE model allowed evaluating material properties for lamination of any width. In the end, the knowledge concerning the material properties was used to calculate the iron loss in the stator of the SyRM motor, showing the need to use the material characteristics calculated for the specified width of the core piece.

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“…In the case of laser cut samples, higher field strength is required to reach a certain level of induction. More studies using SST are given in [11] and [12]. In [11], only CO2 laser was investigated with 120 × 120 mm sheet samples, and 4-mm wide samples showed a doubling of the iron losses compared to full-size sample at 1 T, 50 Hz.…”

Section: Literature Reviewmentioning

confidence: 99%