Rotational hysteresis loss in electrical sheet steels

Brailsford, F.

doi:10.1049/jiee-1.1938.0172

Cited by 23 publications

(18 citation statements)

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“…35 He adds that normal science leads to a temporary "closing of the mind", 36 and that "successful research requires a deep commitment to the status quo". 37 This is because the commitment to the "rules of the game" of a particular research programme makes the scientist a "puzzlesolver", in which progress within the paradigm can be made, and also makes her an "immensely sensitive detector of the trouble spots" from which revolutions eventually spring. 38 So, dogmatic commitment to a paradigm is part of what makes science successful.…”

Section: The 19th Century To the Presentmentioning

confidence: 99%

“…37 This last point makes use of multiplicity of perspective. However, each of these queries was answered in the closed-minded style in the army newspaper the Moderate Intelligencer.…”

Section: The Power Of Love: William Walwyn Versus Thomas Edwardsmentioning

confidence: 99%

“…One of the best and most influential examples is the parable of the Good Samaritan (Luke 10: [25][26][27][28][29][30][31][32][33][34][35][36][37]. This advocates expanding the remit of compassion explicitly to outgroup members, i.e., to people you may hate.…”

Section: Religion and Critical Opennessmentioning

confidence: 99%

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How to be Critically Open-Minded — A Psychological and Historical Analysis

Lambie¹

2014

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Section: The 19th Century To the Presentmentioning

confidence: 99%

“…37 This last point makes use of multiplicity of perspective. However, each of these queries was answered in the closed-minded style in the army newspaper the Moderate Intelligencer.…”

Section: The Power Of Love: William Walwyn Versus Thomas Edwardsmentioning

confidence: 99%

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How to be Critically Open-Minded — A Psychological and Historical Analysis

Lambie¹

2014

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“…Early research into rotational hysteresis centered on the use of torque magnetometers. Work was carried out by Brailsford [4], Archenhold, Sandham and Thompson [5], Boon and Thompson [6], Yamiguchi and Narita [7], Brix [8] and Tan, Datta and Flanders [9]. Young and Schenk [10] and Boon and Thompson [11] used thermal methods to measure rotational power losses in electrical sheet steels.…”

Section: State Of the Artmentioning

confidence: 99%

Measurement of rotational iron losses in electrical sheet

Stranges¹,

Findlay

2000

IEEE Trans. Magn.

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A large portion of the stator core of a rotating electric machine is subjected to magnetic flux that rotates in the plane of the laminations. Iron losses under rotating flux conditions can differ considerably from those due to alternating fields. It has long been suspected that this difference may be responsible for some of the discrepancy between predictions of no-load core loss at the design stage and values obtained by factory test. At present, no international standard exists for determining iron losses due to rotational flux. This paper describes an apparatus capable of making such measurements and briefly reviews the state of the art in this area of research. Measured loss curves are given for seven grades of nonoriented (NO) electrical sheet.

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“…Its main advantage is the direct reading of core loss from torque magnetometers which measure torque or a change in angular speed. The disadvantages include highly complex and sensitivity to friction and vibrations [1], [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Design Considerations of 2-D Magnetizers for High Flux Density Measurements

Wanjiku

Pillay

2015

IEEE Trans. on Ind. Applicat.

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A two-dimensional (2-D) magnetizer introduces variation in the flux density (B) across the sample under rotational magnetization. This variation requires additional energy requirements that limits the attainable aspect-ratios, flux density levels and stresses the supply. A numerical methodology that accounts for the flux leakage and the eddy-currents is proposed to analyze uniformity and variation in B in four 2-D magnetizers. The analysis was done beyond the knee of the magnetization curve. Numerical results will show that round magnetizers can mitigate the variation of the square magnetizer by over 92 %, by making the MMF more sinusoidal and equalizing the reluctance along the airgap. In addition, deeper yokes minimized the variation by about 50 % in the square and the Halbach testers. The results of this analysis was a design that mitigates the variation in B by a combination of sinusoidally distributed windings, and a deep yoke. The proposed magnetizer achieved very high flux densities over a relatively wide frequency range, which were 2.04 T and 1.69 T at 60 Hz and 1 kHz, respectively.

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Rotational hysteresis loss in electrical sheet steels

Cited by 23 publications

References 0 publications

How to be Critically Open-Minded — A Psychological and Historical Analysis

How to be Critically Open-Minded — A Psychological and Historical Analysis

Measurement of rotational iron losses in electrical sheet

Design Considerations of 2-D Magnetizers for High Flux Density Measurements

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