Effect of Compressive Stress on Iron Loss of Gradient Si Steel Sheet

Oda, Y.; Hiratani, Tatsuhiko; Kasai, Shoji; Ōkubo, Tomoyuki; Senda, Kei; Chibá, Akira

doi:10.1002/ecj.11918

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…A detailed discussion on why the rate of increase of iron loss is smaller in gradient Si steel has been reported on as follows. 9 During the manufacturing of gradient Si steel sheets, the Si reacts with the SiCl 4 gas at a high temperature and, then, the siliconizing reaction occurs in which the Si diffuses through the surface of the steel sheet into the steel sheet and Fe is replaced with Si. The atomic radius of Si is smaller than that of Fe and, therefore, the lattice constant of the steel plate surface decreases.…”

Section: Iron Loss Evaluation Methods Under Compressive Stressmentioning

confidence: 99%

“…As a result, iron loss in the high-frequency region, where eddy current loss is dominant, can be reduced. 7,8 Additionally, that have been reports published recently about the degradation of magnetic characteristics resulting from the application of compressive stress being small in gradient Si steel 9 and, as such, this material is considered to be suitable for use in shrink-fit motors.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of shrink‐fit motor using gradient Si steel

Koseki¹,

Oda²,

Hiratani³

et al. 2018

Elect Comm in Japan

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A gradient Si steel sheet shows low iron loss in the high‐frequency range and lower iron loss deterioration under compressive stresses, therefore, it is suitable for use as the core material of high‐speed motors, which have seen considerable downsizing in recent years. By performing shearing and shrink‐fitting, the advantages of gradient Si steel as a motor material are investigated in this study. In both shearing and compressive stress experiments, gradient Si steel showed lower iron loss compared to conventional nonoriented electrical steel (0.2 mm thick). By numerical simulation, the efficiencies of the shrink‐fitted motors using gradient Si steel and 3% Si steel were calculated. The motor using the gradient Si steel showed significantly higher efficiency than that using the 3% Si steel. Moreover, even under city driving conditions, gradient Si steel showed good efficiency, because of lower iron loss deterioration. Therefore, gradient Si steel can be used for a wide variety of motors in addition to high‐frequency devices.

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Section: Iron Loss Evaluation Methods Under Compressive Stressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical simulation of shrink‐fit motor using gradient Si steel

Koseki¹,

Oda²,

Hiratani³

et al. 2018

Elect Comm in Japan

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, high frequency will also cause skin effects on the surface of silicon steel sheet, which will further increase the iron loss [ 3 ]. The loss of certain grades of silicon steel will increase several times when giving them compressive stress from 0 MPa to 100 MPa [ 4 , 5 ]. Silicon steel material will appear as a dynamic strain aging phenomenon under the action of temperature [ 6 ], and its tensile strength will change at the same time.…”

Section: Introductionmentioning

confidence: 99%

Transient Magnetic Properties of Non-Grain Oriented Silicon Steel under Multi-Physics Field

Wang

Tian

et al. 2022

Materials

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High-speed, high-efficiency and high-power density are the main development trends of high-performance motors in the future. At present, the design accuracy of traditional electric machines is already high enough; however, for the future demand of high performance and utilization in special environments (such as aviation and aerospace fields), more thorough research of materials’ performance under multi-physics field (MPF) conditions is still needed. In this paper, a test system that combined temperature, stress and electromagnetic fields along with other fields, at the same time, is built. It can accurately simulate the actual complex working conditions of the motor and explore the dynamic characteristics of non-grain oriented (NGO) silicon steel. The rationality of this method is verified by checking the test result of the prototype, and the calculation accuracy of the motor model is improved.

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“…Studies indicate that the loss of silicon steel sheets increases with compressive stress, while decreases with tensile stress [17]. When the compressive stress is increased from 0 H MPa to 100 MPa, the unit loss of a certain type of silicon steel sheet doubles [18], [19]. The effect from stress on the silicon steel sheets' loss is limited.…”

mentioning

confidence: 99%

High-Speed Permanent Magnet Synchronous Motor Iron Loss Calculation Method Considering Multiphysics Factors

Liu

Zhang

et al. 2020

IEEE Trans. Ind. Electron.

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For the high-speed permanent magnet synchronous motors (HSPMSMs), their magnetic fields are more complicated with the rotating magnetization and harmonics considered. Furthermore, there are interaction effects on motor iron loss from high frequency, temperature and compressive stress. In order to obtain the accurate HSPMSM iron loss calculation model, different iron loss models are proposed considering these physical factors, and the iron loss model considering the interaction effect of the multi-physics factors is given. The magnetic field, temperature field and stress field are analyzed for HSPMSM by FEM. Then the proposed models are employed to calculate the iron loss of the silicon steel sheet and the prototype. The accuracy of the proposed iron loss model, which can consider the interaction effect of the multi-physics factors, is verified by the experimental test measurements on the prototype. Index Terms-High-speed motor, iron loss calculation, multi-physics factors, permanent magnet motor I. INTRODUCTIONIGH-SPEED permanent magnet synchronous motors (HSPMSMs) are increasingly popular owing to their excellent performance including high power density, compact size, high efficiency and the suitability for high-speed direct-drive applications without gearboxes, which are widely

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Effect of Compressive Stress on Iron Loss of Gradient Si Steel Sheet

Cited by 7 publications

References 13 publications

Numerical simulation of shrink‐fit motor using gradient Si steel

Numerical simulation of shrink‐fit motor using gradient Si steel

Transient Magnetic Properties of Non-Grain Oriented Silicon Steel under Multi-Physics Field

High-Speed Permanent Magnet Synchronous Motor Iron Loss Calculation Method Considering Multiphysics Factors

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