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

Ravi Sundaria; Devi Geetha Nair; Antti Lehikoinen; Antero Arkkio; Anouar Belahcen

doi:10.1109/TIE.2019.2942564

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

Ravi Sundaria^*, Devi Geetha Nair, Antti Lehikoinen, Antero Arkkio, Anouar Belahcen

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

38 Citations (Scopus)

465 Downloads (Pure)

Abstract

Cutting of the electrical steel sheets to appropriate shape and size is performed during the manufacturing of electrical machines that 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 20-400 Hz frequency of sinusoidal excitations. Two stators one with laser cut and another one with electric discharge wire cutting are manufactured and the effect of cutting on core losses is 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 (FE) 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 FE analysis (FEA). 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.

Original language	English
Article number	8848857
Pages (from-to)	7354-7363
Number of pages	10
Journal	IEEE Transactions on Industrial Electronics
Volume	67
Issue number	9
DOIs	https://doi.org/10.1109/TIE.2019.2942564
Publication status	Published - Sept 2020
MoE publication type	A1 Journal article-refereed

Funding

Manuscript received April 14, 2019; revised July 25, 2019; accepted September 5, 2019. Date of publication September 25, 2019; date of current version April 30, 2020. This work was supported by the European Research Council under the European Unions Seventh Framework Programme (FP7/2007-2013)/ERC Grant Agreement 339380. (Corresponding author: Ravi Sundaria.) The authors are with the Department of Electrical Engineering and Automation, Aalto University, 15500 Espoo, Finland (e-mail:,ravi.sundaria@ aalto.fi; [email protected]; [email protected]; [email protected]; [email protected]).

Keywords

Core loss
Cut edge
Cutting
Electrical machines
Finite element modeling
Steel cutting
Steel laminations

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10.1109/TIE.2019.2942564

ELEC_sundaria_etal_Effect-of-Laser_IEEETraIndEle_67_2020_acceptedauthormanuscriptAccepted author manuscript, 1.45 MB

Cite this

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title = "Effect of Laser Cutting on Core Losses in Electrical Machines - Measurements and Modeling",

abstract = "Cutting of the electrical steel sheets to appropriate shape and size is performed during the manufacturing of electrical machines that 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 20-400 Hz frequency of sinusoidal excitations. Two stators one with laser cut and another one with electric discharge wire cutting are manufactured and the effect of cutting on core losses is 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 (FE) 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 FE analysis (FEA). 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.",

keywords = "Core loss, Cut edge, Cutting, Electrical machines, Finite element modeling, Steel cutting, Steel laminations",

author = "Ravi Sundaria and Nair, \{Devi Geetha\} and Antti Lehikoinen and Antero Arkkio and Anouar Belahcen",

note = "| openaire: EC/FP7/339380/EU//ALEM",

year = "2020",

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doi = "10.1109/TIE.2019.2942564",

language = "English",

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AU - Sundaria, Ravi

AU - Nair, Devi Geetha

AU - Lehikoinen, Antti

AU - Arkkio, Antero

AU - Belahcen, Anouar

N1 - | openaire: EC/FP7/339380/EU//ALEM

PY - 2020/9

Y1 - 2020/9

N2 - Cutting of the electrical steel sheets to appropriate shape and size is performed during the manufacturing of electrical machines that 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 20-400 Hz frequency of sinusoidal excitations. Two stators one with laser cut and another one with electric discharge wire cutting are manufactured and the effect of cutting on core losses is 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 (FE) 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 FE analysis (FEA). 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.

AB - Cutting of the electrical steel sheets to appropriate shape and size is performed during the manufacturing of electrical machines that 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 20-400 Hz frequency of sinusoidal excitations. Two stators one with laser cut and another one with electric discharge wire cutting are manufactured and the effect of cutting on core losses is 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 (FE) 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 FE analysis (FEA). 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.

KW - Core loss

KW - Cut edge

KW - Cutting

KW - Electrical machines

KW - Finite element modeling

KW - Steel cutting

KW - Steel laminations

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M3 - Article

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JO - IEEE Transactions on Industrial Electronics

JF - IEEE Transactions on Industrial Electronics

IS - 9

M1 - 8848857

ER -

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

Abstract

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ALEM: Additional Losses in Electrical Machines

Effect of Manufacturing Processes on Electrical Machine’s Performance

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

Abstract

Funding

Keywords

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ALEM: Additional Losses in Electrical Machines

Press/Media

Effect of Manufacturing Processes on Electrical Machine’s Performance

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