Effects of Laser Cutting on Microstructure and Magnetic Properties of Non-Orientation Electrical Steel Laminations

Saleem, Aroba; Alatawneh, Natheer; Rahman, Tanvir; Lowther, D.A.; Chromik, Richard R.

doi:10.1109/tmag.2020.3029256

Cited by 18 publications

(21 citation statements)

References 28 publications

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“…In accordance with [42], no significant change in the grain size near the cut edge due to laser cutting is observed in the M250-35A LB and NO10 LB stacks (the time is too short to allow grain growth). However, unlike in [42], no contrast effects are observed for the laser cut edges of both the M250-35A LB and NO10 LB stacks.…”

Section: Analysis Of the No10 Lb Lamination Stacksupporting

confidence: 79%

Effect of Manufacturing Influences on Magnetic Performance Parameters of Sub-Fractional Horsepower Motors

2021

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Depending on the stator lamination manufacturing processes (e.g., punching, laser cutting, clamping, welding, interlocking, bonding), the motor's magnetic performance parameters such as cogging torque, hysteresis torque, and iron losses can vary significantly. In sub-fractional horsepower permanent magnet motors, the manufacturing influence is typically even more severe because, due to their small dimensions, practically the whole stator material is likely to be affected. This paper analyzes the magnetic performance parameters cogging torque, hysteresis torque, and iron losses of three different stator lamination stacks (i.e., M250-35A punched with interlocking, M250-35A laser cut with bonding, NO10 laser cut with bonding) of a sub-fractional horsepower singlephase brushless permanent magnet motor often found in automotive fan applications. A rheometer is used for extremely accurate torque measurements in the sub-milli-Newton meter range, and electron backscatter diffraction measurements are performed to visualize changes in the grain morphology and crystal orientation. The findings reveal that the punched stator with interlocking is affected the most by the manufacturing process, showing the lowest cogging torque yet the highest average hysteresis torque and thus up to 40 % higher iron losses. The results presented in this paper allow for both making basic stator lamination design choices and translating the iron losses, as well as the hysteresis torque and cogging torque waveforms, of a laser cut and bonded prototype into those of its punched and interlocked mass-produced counterpart.

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Section: Analysis Of the No10 Lb Lamination Stacksupporting

confidence: 79%

Effect of Manufacturing Influences on Magnetic Performance Parameters of Sub-Fractional Horsepower Motors

2021

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“…These deviations can be attributed to slitting effects, as reported e.g. in [8,9]. Anyhow, we conclude from such results that the enlargement of Epstein tester -in connection with the direct determination of field -promises an increased absolute accuracy of loss measurement, for technical frequencies.…”

Section: Set Sst Getsupporting

confidence: 76%

“…However, it yields an additional source of error from specific effects of sample cutting. They are initiated from the tendency that cutting of the narrow sample strips may cause severe deterioration of their magnetic characteristics in edge zones of width WD of several mm [8,9].…”

Section: Introductionmentioning

confidence: 99%

Giant Epstein Tester for Magnetic Energy Loss Measurements of Non-Annealed Domain-Refined Fe–Si

Shilyashki

Pfützner²,

Giefing

et al. 2022

IEEE Trans. Magn.

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“…In recent years, laser cutting technology has been continuously promoted in the electrical steel industry, and a lot research has been carried out to investigate the influencing mechanisms of laser cutting models and parameters on the quality of the cutting edge [ 3 , 4 , 5 , 6 ]. The local microstructure, crystallographic texture, chemical composition, inclusion fraction as well as the stress state near the edge can be changed in the melting and solidification process induced by laser cutting [ 7 , 8 ]. These changes demonstrate the complicated effects on the magnetic and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Laser Cutting Parameters on the Magnetic Properties of 50W350 High-Grade Non-Oriented Electrical Steel

Xiang

Cheng

2023

Materials

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Based on the application demand of laser cutting technology in non-oriented electrical steel, the influencing mechanisms of laser cutting parameters on the magnetic properties of 50W350 high-grade non-oriented electrical steel were investigated in this work. The specific total loss was utilized to evaluate the quality of cutting methods and the cutting parameter combinations. The results showed that the deterioration of the specific total loss was mainly due to the increase in hysteresis loss. Compared to traditional mechanic shearing, laser cutting generally degrades the magnetic properties under the evaluation index ΔP1.0/50. However, in some cases, laser cutting is superior to the mechanic shearing method under the evaluation index ΔP1.5/50. The main parameters related to laser cutting exhibited complicated influencing mechanisms on the specific total loss of 50W350 high-grade non-oriented electrical steel. However, based on the results of the experiments designed using the Box–Behnken model, the laser cutting parameters were optimized and the evaluation indexes have been significantly improved.

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Effects of Laser Cutting on Microstructure and Magnetic Properties of Non-Orientation Electrical Steel Laminations

Cited by 18 publications

References 28 publications

Effect of Manufacturing Influences on Magnetic Performance Parameters of Sub-Fractional Horsepower Motors

Effect of Manufacturing Influences on Magnetic Performance Parameters of Sub-Fractional Horsepower Motors

Giant Epstein Tester for Magnetic Energy Loss Measurements of Non-Annealed Domain-Refined Fe–Si

Effects of Laser Cutting Parameters on the Magnetic Properties of 50W350 High-Grade Non-Oriented Electrical Steel

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