Influence of edge mechanical stress on the 50 Hz magnetic properties of thin electrical steel

Manescu-Paltanea, Veronica; Păltânea, Gheorghe; Nemoianu, Iosif Vasile

doi:10.1109/optim.2017.7975010

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…This paper will modify the hysteresis loss coefficient of the three component core loss formula presented in [9]. The three component core loss formula (3) have coefficients of eddy current K e , excess loss K ex and exponent α which are cubic polynomials of B. This paper fixed the parameters such as K h0 , α, K e , and K ex at non-degraded value.…”

Section: B Loss Modelmentioning

confidence: 99%

“…Researchers have performed the magnetic measurements with the help of standard Epstein frame and single sheet tester. The generated plastic, residual and thermal stresses seem to translate into a drop in permeability and increase in core loss density [1]- [3]. Various authors proposed loss models dependent on the distance from the cut-edge to include the effect of cutting on the magnetic permeability and core-losses.…”

Section: Introductionmentioning

confidence: 99%

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Loss Model for the Effects of Steel Cutting in Electrical Machines

Sundaria

Nair

Lehikoinen

et al. 2018

2018 XIII International Conference on Electrical Machines (ICEM)

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Epstein frame measurements of electrical steel samples of different widths cut by laser cutting are carried out in the range of 20 Hz to 400 Hz frequency of sinusoidal excitations. The effect of cutting on the magnetic permeability with core losses are modeled with analytical equations. Further, the validation of the model is carried out with finite element simulations of electrical steel samples. The presented loss model is found to reproduce the measurement results reasonably. The loss model is then applied to the simulation of a cage induction machine with time-stepping finite element analysis. The electromagnetic and thermal performance of the machine was analyzed with respect to the cutting effect. The simulations shows increase in the computed core losses and temperatures due to the cutting effect.

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Section: B Loss Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Loss Model for the Effects of Steel Cutting in Electrical Machines

Sundaria

Nair

Lehikoinen

et al. 2018

2018 XIII International Conference on Electrical Machines (ICEM)

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“…to form stack and shrink fitting. Each of these manufacturing steps have an impact on losses in the final manufactured machine [1], [2]. Among these manufacturing effects, those related to the cutting of sheets have garnered the interest of the research community in the last couple of decades.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Cutting on Core Losses in Electrical Machines—Measurements and Modeling

Sundaria

Nair

Lehikoinen

et al. 2020

IEEE Trans. Ind. Electron.

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Cutting of the electrical steel sheets to appropriate shape and size is performed during the manufacturing of electrical machines which leads to the magnetic material deterioration near the cutting edge. Epstein frame measurements of electrical steel samples of different widths cut by laser cutting are carried out in the range of 20 Hz to 400 Hz frequency of sinusoidal excitations. Two stators one with laser cut and another one with electric discharge wire cutting were manufactured and the effect of cutting on core losses was analyzed. The effect of cutting on the magnetic permeability and core losses are modeled with analytical equations. Furthermore, the model is implemented in the finite element simulation of the Epstein frame test setup. The presented loss model is found to reproduce the measurement results reasonably. The loss model is then applied to the simulation of a cage induction machine with time-stepping finite element analysis. A significant increase in core losses was observed both in simulations and measurements due to the effect of laser cutting. The presented cutting model closely follows the measured core losses.

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