Loss Model for the Effects of Steel Cutting in Electrical Machines

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

doi:10.1109/icelmach.2018.8506822

Cited by 8 publications

(5 citation statements)

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“…An innovative approach was developed in [ 89 ], presenting a variation in the magnetization vector based on the Langevin function that permitted the authors to develop a theory by including the Gumbel distribution to provide an analytical expression of damaged steel magnetic susceptibility. Table 4 summarizes the main analytical models reported in the literature [ 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 ].…”

Section: Influence Of Cutting Technology On Magnetic Properties Of No...mentioning

confidence: 99%

“…These aspects are worth mentioning because the manufacturing effect must always be considered before a high-efficiency motor is designed, having to comply with predefined characteristics and specific applications. In Table 4 , some interesting approaches that were based on electromagnetic simulations in commercial programs or in-house developed software [ 80 , 84 , 86 , 89 , 90 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 ] are introduced. In Figure 8 are presented analytical and FEM approaches that include the cutting technology effect on magnetic properties variations of NO FeSi.…”

Section: Influence Of Cutting Technology On Magnetic Properties Of No...mentioning

confidence: 99%

“…The model was considered a semi-empirical one, and the authors concluded that it could be useful in high-speed motor production [91] µ, p Fe M400-50A/punching, laser, and EDM µ(H, x) = µ n (H) − ∆µ(H)e −ax , p Fe (B, x) = K h0 + ∆K h (B)e −bx B α(B) f + K e B 2 f 2 + (Kex(B)e −cx )B 1.5 f 1.5 -Parameters ∆µ(H) and a are experimentally computed [92][93][94] µ, p Fe M400-50A/punching…”

Section: Analytical and Numerical Modelsmentioning

confidence: 99%

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Mechanical and Magnetic Properties Variation in Non-Oriented Electrical Steels with Different Cutting Technology: A Review

Paltanea,

Manescu (Paltanea),

Antoniac

et al. 2024

Materials

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The problem of energy consumption reduction establishes important challenges for electric motor producers in the framework of new international regulations regarding the conditions that must be accomplished by motors in the near future. One of the most important topics is related to the core loss decrease directly linked to the effect of electrical steel degradation induced by the cutting technology. Understanding exactly how this phenomenon occurs by analyzing the chemical, mechanical, crystallographic, magnetic domain, and magnetic properties is of utmost importance when manufacturing processes must be changed and adapted to a new market characterized by high-efficiency motors. Today, mechanical and laser cutting technologies are the most used because of their reduced price and high-speed process. Still, unfortunately, these methods are not the best due to the fact that they lead, in most cases, to a high value of magnetic core losses, low electromagnetic torque, and hence reduced efficiency. This review paper shows that non-conventional technologies such as water jetting and electroerosion could be applied if proper modifications are added. This paper’s main idea is to present a comprehensive study regarding the impact of cutting technologies on microhardness and residual stresses, crystallographic texture, magnetic domain structure, and magnetic properties of some non-oriented electrical steels used in motor production. It provides a detailed analysis of the abovementioned aspects by including the authors’ research and findings in the wider context of other research group contributions. It also offers a general idea of the mechanisms present at the macro- and microscopic levels. The readers can find some of the most used analytical models, including the cutting process’s damaged effect on the magnetic properties’ variation based on a simple mathematical approach and examples of finite element modeling performed on real motor designs implemented in various programs. Last but not least, some practical implementations of the cutting procedure’s influence on motor working conditions are presented in the last section of the paper. It provides an up-to-date analysis regarding how the cutting method should be included in high-efficiency motor production by emphasizing the importance of the topic and identifying where supplementary research must be undertaken. From the investigated literature, by analyzing specific sample geometries associated with different characterization methods, it can be concluded that all the cutting technologies have an important contribution to the mechanical and magnetic quantities. When the magnetic core of an electric motor is produced through non-conventional methods, the overall influence of the cutting procedure has a low percentage in the motor efficiency, as presented in this paper.

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Section: Influence Of Cutting Technology On Magnetic Properties Of No...mentioning

confidence: 99%

Section: Influence Of Cutting Technology On Magnetic Properties Of No...mentioning

confidence: 99%

Section: Analytical and Numerical Modelsmentioning

confidence: 99%

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Mechanical and Magnetic Properties Variation in Non-Oriented Electrical Steels with Different Cutting Technology: A Review

Paltanea,

Manescu (Paltanea),

Antoniac

et al. 2024

Materials

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“…In papers [83][84][85], a sheet with a thickness of 0.5 mm was tested. The local permeability value at a distance x from the cut edge is given by (17):…”

Section: Simulation Models Of Changes In Electromagnetic Properties C...mentioning

confidence: 99%

The Influence of Cutting Technology on Magnetic Properties of Non-Oriented Electrical Steel—Review State of the Art

2023

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The global drive to reduce energy consumption poses new challenges for designers of electrical machines. Losses in the core are a significant part of losses, especially for machines operating at an increased rotational speed powered by PWM inverters. One of the important problems when calculating core losses is considering the effect of material degradation due to mechanical or laser cutting. To this aim, this paper analyzes and summarizes the knowledge about the sources of material property deterioration and ways of describing this phenomenon. The cited results of material tests indicate the lack of unequivocal relationships allowing us to estimate the degree of material damage and the resulting deterioration of material properties. The main task of this article is to present the state of knowledge on the possibility of taking into account the impact of cutting the core sheets of electric motors on core losses and their impact on the efficiency of the machine. This is a significant problem due to the need to design and manufacture energy-saving electric motors powered with a voltage of 20 to 350 Hz, whose magnetic cores are made of laminates. However, the performed analysis indicates the most important parameters of the cutting process, affecting the degree of material structure destruction. The method of the solution proposed by the authors for core punching and laser cutting, illustrated with a practical example, is also presented.

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“…Besides, solution of this model in FEA is time consuming. To solve these issues, a new model is presented in [42], which includes the cut-edge effect in the hysteresis coefficient.…”

mentioning

confidence: 99%

Modeling and Analysis of Electric Motors: State-of-the-Art Review

Bilgin

Liang

Terzić

et al. 2019

IEEE Trans. Transp. Electrific.

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This paper presents a comprehensive state-ofthe-art review of the modeling and analysis methods for the multidisciplinary design of electric motors for various applications including vehicular power and propulsion systems and electrified powertrains. It covers the important aspects of different engineering domains such as dynamic modeling, loss calculations, demagnetization analysis, thermal modeling, acoustic noise and vibration analysis, and mechanical stress modeling. The paper intends to guide the electric motor designers through examples and results on how to apply different analysis techniques on electric motors.

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Loss Model for the Effects of Steel Cutting in Electrical Machines

Cited by 8 publications

References 10 publications

Mechanical and Magnetic Properties Variation in Non-Oriented Electrical Steels with Different Cutting Technology: A Review

Mechanical and Magnetic Properties Variation in Non-Oriented Electrical Steels with Different Cutting Technology: A Review

The Influence of Cutting Technology on Magnetic Properties of Non-Oriented Electrical Steel—Review State of the Art

Modeling and Analysis of Electric Motors: State-of-the-Art Review

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