Abstract
A PAPER by J. Swaffield (J. Inst. Elec. Eng., 89, Pt. 1, No. 17, May, 1942) reports the main results of an investigation carried out (1935-37) by the British Electrical and Allied Industries Research Association on model cores under controlled conditions to provide fundamental information on transformer noise. The factors affecting core noise are flux density, magnitude and uniformity of the core clamping pressure, steel quality, lamination thickness, type and thickness of interlaminar insulation,. and method of interleaving the laminations. The ranges of design variables covered by the tests were flux density, 8,000-16,000 lines/cm.2 or, higher ; clamping pressure, 0-350 lb./sq. in. ; qualities of steel, E.S. stalloy and stalloy ; thickness of laminations, 14 and 18 mils ; insulation' between laminations, insuline, paper and scale only ; type of joint, concentrated, distributed and none.
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TRANSFORMER NOISE. Nature 149, 738 (1942). https://doi.org/10.1038/149738a0
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DOI: https://doi.org/10.1038/149738a0