Evaluation of local magnetic degradation by interlocking electrical steel sheets for an effective modelling of electrical machines

Imamori, Satoshi; Aihara, Shigeru; Shimoji, Hiroyasu; Kutsukake, Akifumi; Hameyer, Kay

doi:10.1016/j.jmmm.2019.166372

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Both mechanical joining [ 44 , 48 , 49 , 50 ] and fusion welding [ 37 , 38 , 46 , 51 , 52 ] are widely used to join the laminated electrical steels at present. Senda et al [ 44 ] compared the effects of two representative V-type mechanical interlocking methods, dowel formation and dowel jointing on the magnetic properties of the joined ring core sample made of the electrical steel laminations, they found that two methods showed comparable contributions to iron loss increase at low frequencies (e.g., 50 Hz), whereas, increases in iron loss due to dowel jointing were greater than those due to dowel formation at high frequencies.…”

Section: The Representative Joining Methodsmentioning

confidence: 99%

“…Before the experiment, the welded sample was winded, and the numbers of the primary winding turns and the secondary winding turns were counted, respectively. The other papers also mentioned similar experimental systems to measure the magnetic properties of the electrical steel laminations [48,60,61], and all these systems were developed based on the same principle. where was the density of the electrical steel sample, T was the period of time in the measurement.…”

Section: System To Measure the Magnetic Propertiesmentioning

confidence: 99%

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Joining of the Laminated Electrical Steels in Motor Manufacturing: A Review

Xia

Wang

et al. 2020

Materials

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In recent years, the motor has been increasingly used to replace the conventional gasoline engine for carbon emission reduction, and the high-performance motor is urgently required. The stator and rotor in a motor are made of hundreds of joined and laminated electrical steels. This paper covers the current research in joining the laminated electrical steels for the motor application, together with the critical assessment of our understanding. It includes the representative joining method, modeling of the joining process, microstructure of the weld zone, mechanical strength and magnetic properties. The gaps in the scientific understanding, and the research needs for the expansion of joining laminated electrical steels, are provided.

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Section: The Representative Joining Methodsmentioning

confidence: 99%

Section: System To Measure the Magnetic Propertiesmentioning

confidence: 99%

Joining of the Laminated Electrical Steels in Motor Manufacturing: A Review

Xia

Wang

et al. 2020

Materials

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“…However, the overall magnetic measurement of ring cores cannot accurately reflect the localized magnetic properties around the interlock and are not sufficient for accurate simulation of the cores with interlocks. Some preliminary attempts for interlocking localized magnetic measurements are also in progress, but they mainly focus on interlocks with a single size and a single magnetization direction (Imamori et al , 2020). The accurate modeling method used in other processing processes, such as cutting and punching (Fujisaki et al , 2007; Bali et al , 2014; Lazari et al , 2015), has not been applied in interlocking.…”

Section: Introductionmentioning

confidence: 99%

Localized magnetic properties measurement of interlocking core laminations

Zhang²,

Yu³

et al. 2022

COMPEL

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Purpose In rotational alternating current machines, interlocking is a commonly used manufacturing method to fix laminated silicon steel cores. The purpose of this study is to measure the localized magnetic properties more comprehensively and to analyze the deteriorated magnetic properties caused by interlocking more accurately. Design/methodology/approach A movable B–H sensor is designed in this paper. The localized magnetic properties measurement was performed to investigate the magnetic properties around the interlocks with various sizes, various orientations and various numbers of laminations. Then, the damaged area caused by the interlocking was quantified, and the magnetic degradation of different degrees is layered. Findings The measurement results have shown that the interlocks with larger sizes, along the transverse direction and on 10-layer laminate, will lead to more serious magnetic degradation, and the maximum loss increment can reach up to 70%. Originality/value This work is an improvement and optimization based on the previous overall magnetic measurement of the interlock. The quantitative results of the localized magnetic measurement will have a certain significance for the accurate modeling and simulation of the electrical machines and provide valuable guidance for the optimization of the actual production process of the motor.

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Analytical approach to estimate the polyphase induction machine performance

Megahed

2020

Journal of Magnetism and Magnetic Materials

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Evaluation of local magnetic degradation by interlocking electrical steel sheets for an effective modelling of electrical machines

Cited by 4 publications

References 8 publications

Joining of the Laminated Electrical Steels in Motor Manufacturing: A Review

Joining of the Laminated Electrical Steels in Motor Manufacturing: A Review

Localized magnetic properties measurement of interlocking core laminations

Analytical approach to estimate the polyphase induction machine performance

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