Local Non-contact Evaluation of the ac Magnetic Hysteresis Parameters of Electrical Steels by the Barkhausen Noise Technique

Stupakov, O.

doi:10.1007/s10921-013-0194-8

Cited by 21 publications

(20 citation statements)

References 15 publications

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“…The dotted line is the best polynomial fit to the data when higher MBN emissions are measured, which is qualitatively in agreement with earlier studies [22,23] on grain oriented Si-Fe laminates. The most recent paper [24] also observed a strong correlation between MBN and core loss in both oriented and non-oriented Si-Fe laminates, however in that case the correlation was a direct, rather than an inverse one. The difference in behaviour from the present study is likely due to a smaller grain size relative to the previous samples [24] and a different level of excitation field.…”

Section: Grain Size and Texture Measurementsmentioning

confidence: 90%

“…The most recent paper [24] also observed a strong correlation between MBN and core loss in both oriented and non-oriented Si-Fe laminates, however in that case the correlation was a direct, rather than an inverse one. The difference in behaviour from the present study is likely due to a smaller grain size relative to the previous samples [24] and a different level of excitation field. Figure 2 also demonstrates the relatively high sensitivity of the MBN technique to only a small range of variation in core loss.…”

Section: Grain Size and Texture Measurementsmentioning

confidence: 90%

“…The correlation between MBN and core loss in grain oriented electrical steel laminates has been investigated in a limited number of earlier papers where the MBN technique is applied under field or current control [22][23][24]. The present work uses a flux-controlled MBN technique to further investigate the applicability of MBN for non-destructive monitoring of core loss in NOES.…”

Section: Introductionmentioning

confidence: 99%

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Correlation Between AC Core Loss and Surface Magnetic Barkhausen Noise in Electric Motor Steel

et al. 2014

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Core loss is a significant source of energy loss in electric motor steel laminates. Therefore, there is interest in monitoring the quality and consistency of laminates at various stages of manufacturing. The purpose of this study was to investigate the feasibility of using surface magnetic Barkhausen noise for the evaluation of AC core loss, and further, to examine potential origins of magnetic loss in nonoriented electrical steel. Core loss values were measured by a single sheet tester and Barkhausen noise measurements were performed using pole flux control on eight laminates with various grain size, texture and composition. Magnetocrystalline energy was calculated from X-ray diffraction data to quantify texture. Results demonstrated higher surface Barkhausen emissions for samples with lower core loss. Barkhausen noise analyses were used to examine the interplay among core loss, grain size, magnetocrystalline energy and B-H characteristics. The inverse correlation between core loss and Barkhausen noise emissions was qualitatively explained in terms of the orthogonal vector contribution of microscopic eddy currents to losses associated with bulk currents arising in the sample during magnetization.

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Section: Grain Size and Texture Measurementsmentioning

confidence: 90%

Section: Grain Size and Texture Measurementsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Correlation Between AC Core Loss and Surface Magnetic Barkhausen Noise in Electric Motor Steel

et al. 2014

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“…Integration of the BN envelope gives a hysteresis-like loop, usually called a BN loop. The main difference between the hysteresis and the BN loops is that the BN signal is not normalized to the physically-based stable value as B max [13]. Increase of a maximum value or an area of the BN loop with f mag illustrates the studied dynamical behavior of BN.…”

Section: Resultsmentioning

confidence: 99%

“…The main contributions to BN are detected in the regions, which precede and follow the coercivity point, i.e., the curved parts of the hysteresis loop between the saturation and the magnetization reversal. In addition, the region preceding the reversal gives rise to the higher BN signal, probably due to the 90°domain wall reorganization [2], [13]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Dynamical Properties of Magnetic Barkhausen Noise in a Soft Microalloyed Steel

2015

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This paper investigates dynamical behavior of magnetic Barkhausen noise (BN). The measurements were performed for a soft mild steel at controllable magnetizing conditions: 1) the fixed sinusoidal/triangular waveforms of the magnetic induction or 2) the surface magnetic field. Two vertically mounted Hall sensors were used for direct determination of the sample magnetic field. The BN was detected locally by a surface-mounted coil. A typical two-peak shape of the BN envelope was found to reduce to a usual single-peak profile at the constant field rate. These two peaks were shown to correspond to the regions of the magnetic domain reconfiguration preceding and following the rapid magnetization reversal at the coercive field. In ac magnetizing frequency range of 0.2-30 Hz, the BN parameters followed a nearly square root dependence on the frequency. A low-frequency component of the BN signal, approximately up to 25 kHz, was revealed to contain an important part of the micromagnetic information.Index Terms-Barkhausen effect, frequency measurement, magnetic field measurement.

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