Magnetic Property of Amorphous Magnetic Thin Ribbon and Its Laminated Bulk Under Tensile and Compressive Stresses

Mizuta, Takahiro; Tani, Yoshiaki; Fujiwara, Koji

doi:10.1109/tmag.2018.2829191

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…The MS strain value λ is set to 10 ppm as an example. Substituting these values into ( 26 26)- (30). This consistency indicates that the theoretical equivalent MS forces, derived from ( 21) and ( 22), successfully produce the assigned MS strain within the ring.…”

Section: E Verification Of Equivalent Ms Force Equationsmentioning

confidence: 59%

“…To validate the equivalent MS forces theoretically obtained in ( 26)- (30), these MS forces are applied to the meshes on a ring core in the ANSYS static structural FEA. The ring core shown in Fig.…”

Section: E Verification Of Equivalent Ms Force Equationsmentioning

confidence: 99%

“…In addition, amorphous iron is utilized in power transformer applications because of its low core loss. Although neither material has been widely adopted in motor applications, their pronounced low core loss characteristics may provide significant efficiency enhancements in future motor applications [29], [30].…”

Section: A Magnetostriction Of Core Materialsmentioning

confidence: 99%

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Magnetostriction Vibration and Acoustic Noise in Motor Stator Cores

Cai,

El-Faouri,

Saikawa

et al. 2024

IEEE Trans. on Ind. Applicat.

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This study focuses on the impact of magnetostriction on vibration and acoustic noise emitted from motor stator cores. Typically, motor vibration and acoustic noise are attributed to radial electromagnetic forces, torque ripple, and pulse-width modulation switching. However, it is important to consider the influence of magnetostriction in iron core materials with high magnetostriction. In this study, an analytical model was developed to derive the equivalent magnetostrictive force in a global cylindrical coordinate system to understand the effect of magnetostriction on motor iron cores. Three core materials with different magnetostriction characteristics were used to fabricate three individual stator cores for comparative experiments. To isolate the effect of magnetostriction, an additional toroidal winding was added to excite the stator yoke, avoiding the generation of electromagnetic forces and inducing vibration solely by magnetostriction. The magnetostrictive strain, vibration, and sound pressure level of the three stator cores were measured and compared. The results clearly indicate that magnetostriction has a significant impact on vibration and acoustic noise in motor cores, particularly in high-magnetostriction core materials.

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Section: E Verification Of Equivalent Ms Force Equationsmentioning

confidence: 59%

Section: E Verification Of Equivalent Ms Force Equationsmentioning

confidence: 99%

See 1 more Smart Citation

Magnetostriction Vibration and Acoustic Noise in Motor Stator Cores

Cai,

El-Faouri,

Saikawa

et al. 2024

IEEE Trans. on Ind. Applicat.

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“…Simulations of transformer cores have been analyzed in [13][14], and the results show that the magnetostrictive force, rather than the electromagnetic force, is the main factor causing the vibration of the transformer core. For vibration characteristics of the core, the vibration characteristics of single-phase amorphous alloy planar wound cores have been researched under various support boundary conditions [15]. A comparative analysis of the vibration displacement characteristics is performed by constructing a vibration testing platform for single-frame cores, two-frame single-phase transformers, and three-frame three-phase transformers [16].…”

Section: Introductionmentioning

confidence: 99%

Magnetostrictive Vibration Characteristics of Amorphous Alloy Transformer With Three-Dimensional Wound Core

Song,

Han,

Yang

et al. 2024

IEEE Access

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The amorphous alloy transformer with three-dimensional wound core (TDWC) is a new type of transformer structure. Compared with the traditional three-phase five-column transformer with planar wound core (PWC), the TDWC structure exhibits a fully symmetrical magnetic circuit, resulting in enhanced short-circuit withstand capability. However, the vibration noise of the core becomes a significant engineering challenge in the design and manufacturing process due to the larger magnetostrictive coefficient of the amorphous alloy. This study establishes a magnetic-mechanical coupling mathematical model for amorphous alloy TDWC considering the magnetostrictive effect. Three-dimensional finite element analysis (FEA) is adopted to calculate the flux and vibration displacement distribution of the TDWC. Additionally, an experimental validation is conducted on a 200kVA amorphous alloy TDWC prototype to verify the accuracy of the model. Furthermore, a comparison with the PWC prototype demonstrates that the TDWC structure can effectively reduce surface vibrations, and the dominant frequency distribution law of vibration displacement at different positions of the TDWC structure is revealed, providing a foundation for the design of vibration reduction and noise control for TDWC.INDEX TERMS Amorphous alloy; magnetostriction; planar wound core; three-dimensional wound core; vibration characteristics

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“…On the one hand, the core structure and winding shape of an amorphous alloy transformer are different from traditional ones. On the other hand, an amorphous alloy is characterized by a larger magnetostriction coefficient and is sensitive to stress [4,5]. Therefore, amorphous alloy transformer acoustic noise mainly results from the iron core, winding, and other ancillary structural components, among which transformer winding contributes more noise [6,7].…”

Section: Introductionmentioning

confidence: 99%

Measurement Analysis and Improvement of Vibroacoustic Characteristics of Amorphous Alloy Transformer

Liu¹,

Zhang²,

Wu³

et al. 2022

Energies

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The amorphous alloy transformer has a smaller coercive force and lower specific iron loss. It precedes the conventional silicon steel sheet transformer from the perspective of energy conservation. However, amorphous alloy material has a more significant magnetostriction coefficient, resulting in stronger vibration and acoustic noise. This paper investigates the measurement, analysis, and improvement of vibroacoustic characteristics of one three-phase, four-frame amorphous alloy distribution transformer to reduce environment noise pollution. This study adopts a coupling analysis method of magnetic–force–acoustic multi-physical fields to analyze the vibroacoustic characteristics. It then introduces a novel combination method of magnetic field analysis and an electric circuit to improve the efficiency of magnetic field analysis. This new combination method can greatly reduce the solution time of multiple physical fields through comparison with the traditional field-circuit coupling method. Different from other studies, this paper studies the acoustic and vibration characteristics of an amorphous alloy transformer under both no-load and load conditions. It is found that the load vibration noise of an amorphous transformer is more severe than that of a traditional silicon steel transformer. Accordingly, the study measures the vibroacoustic characteristic with different excitations and load levels under different working conditions to verify the numerical analysis method. Furthermore, according to the analysis results, this paper suggests a few vibration and noise control strategies. In conclusion, the paper deduces an essential basis for exploring strategies of vibration reduction and noise control for amorphous alloy distribution transformers.

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Magnetic Property of Amorphous Magnetic Thin Ribbon and Its Laminated Bulk Under Tensile and Compressive Stresses

Cited by 6 publications

References 7 publications

Magnetostriction Vibration and Acoustic Noise in Motor Stator Cores

Magnetostriction Vibration and Acoustic Noise in Motor Stator Cores

Magnetostrictive Vibration Characteristics of Amorphous Alloy Transformer With Three-Dimensional Wound Core

Measurement Analysis and Improvement of Vibroacoustic Characteristics of Amorphous Alloy Transformer

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