The Effect of Sample’s Dimension and Cutting Technology on Magnetization and Specific Iron Losses of FeSi Laminations

Dems, M.; Komęza, Krzysztof; Gmyrek, Zbigniew; Szulakowski, Jacek

doi:10.3390/en15062086

Cited by 10 publications

(5 citation statements)

References 42 publications

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“…To verify it, a test with the Epstein frame should be arranged with the sample cut in the rolling direction. However, the results are consistent with the one presented in the literature, and no additional tests have been carried out [23], [24], [25].…”

Section: Experimental Validation Of the Bh Curve On Different Samplessupporting

confidence: 91%

Impact of Manufacturing Stresses On Multiple-Rib Synchronous Reluctance Motor Performance

Credo

Petrov

Pyrhönen

et al. 2023

IEEE Trans. on Ind. Applicat.

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The effects of manufacturing stresses on the overall magnetic properties of electrical steel core applied in the stator and transversally-laminated rotor of Synchronous Reluctance motors are studied. In addition, it is investigated how the -manufacturingdegraded electrical steel core affects the electromagnetic performance of two different Synchronous Reluctance motors. The traditional transversally-laminated rotor of this kind of a machine requires the adoption of mechanical elements (inner and tangential ribs) to maintain its mechanical integrity. Especially, for high-speed applications, the number of rotor ribs must be increased to make the rotor withstand higher centrifugal forces. Lamination manufacturing typically affects the magnetic properties of electrical steel by reducing its permeability at the machined edge. This machining effect is greater when the overall core layer area surrounded by the machined edges is small i.e., the machined surface area ratio to the total core area is high. Considering this, the degradation of the core magnetic properties in the ribs could improve the performance of the machine, and this effect would be more visible when the machine is designed with a higher number of narrow ribs with the adoption of Topology Optimization. The paper aims to propose some guidelines for the simulation of these effects starting from the measurements on defined core samples and then based on the measured results the simulation model should be updated accordingly. The samples are manufactured from several assembled sheets in order to modify the width of the cut area while maintaining the same external geometry.

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Section: Experimental Validation Of the Bh Curve On Different Samplessupporting

confidence: 91%

Impact of Manufacturing Stresses On Multiple-Rib Synchronous Reluctance Motor Performance

Credo

Petrov

Pyrhönen

et al. 2023

IEEE Trans. on Ind. Applicat.

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“…It must also be mentioned that the important consequences of the viscous effects are combined with long-range eddy currents, determining an increase in the total energy dissipated during the magnetization process. This phenomenon is characterized by a broadening of the hysteresis cycle when the measuring frequency increases [ 46 , 69 ]. In this section, some examples of how the cutting procedure influences the total power or energy losses are provided, as well as some studies that computed the dynamic losses with their two components: the macroscopic one due to eddy currents occurring along circular patterns inside the material (usually termed as “classical losses”) and another one characteristic for microscopic level, which is due to the micro eddy currents that flow within the domain wall, to be found in the literature as “excess losses”.…”

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

confidence: 99%

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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“…The approach to modify the performance of the wire cut techniques of laminations is experimentally discussed in [46,47]. The effect of punching and laser cutting on the magnetic properties of ESLs is further investigated in [48], taking magnetic anisotropy into account. Samples cut in various directions were tested for this purpose.…”

Section: Cutting Processmentioning

confidence: 99%

“…The effect of punching and laser cutting on the magnetic properties of ESLs is further investigated in [48], taking magnetic anisotropy into account. Samples cut in various directions were tested for this purpose.…”

Section: Cutting Processmentioning

confidence: 99%

A Review on the Effect of Electrical Steel Manufacturing Processes on the Performance of Electric Machines

Mahmouditabar,

Baker

2023

Energies

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The manufacturing processing of Electrical Steel Laminations (ESLs) for electric machines comprises cutting, stacking, and housing techniques which can result in plastic deformation and residual stress in the soft magnetic material. These manufacturing processes result in decreasing the magnetic quality and a local increase in both the static and dynamic hysteresis losses near the cut edges and consequently a reduction in the performance of the designed motor. The iron losses resulting from cutting can vary by a factor of two or more depending on geometrical, material, and processing parameters as well as the magnetic field strength. It is advantageous to consider these manufacturing effects in the design stage to reduce the probability of underperforming mass production. In this paper, the manufacturing processes of ESLs and their modelling methods are comprehensively surveyed. The gaps in scientific understanding and the research need for the expansion of accurate modelling of the cutting and joining of ESLs are subsequently discussed.

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The Effect of Sample’s Dimension and Cutting Technology on Magnetization and Specific Iron Losses of FeSi Laminations

Cited by 10 publications

References 42 publications

Impact of Manufacturing Stresses On Multiple-Rib Synchronous Reluctance Motor Performance

Impact of Manufacturing Stresses On Multiple-Rib Synchronous Reluctance Motor Performance

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

A Review on the Effect of Electrical Steel Manufacturing Processes on the Performance of Electric Machines

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