Results 271 to 280 of about 21,646 (293)

Separate leakage reactance of transformer windings

Journal of the A.I.E.E., 1925
The paper discusses a method for determining the separate leakage reactances of transformer windings, originally suggested in 1921 by W. V. Lyon.2 The method is applicable only to three-phase banks of three identical transformers, and makes use of the third harmonic electromotive force and current which are introduced into the windings by the inherent ...
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Surge Characteristics of Two-Winding Transformers

Transactions of the American Institute of Electrical Engineers, 1941
THE object of this paper is to show the performance of transformers with two windings in the rapid-transient state when surges develop in their conductors. On the one hand, we will determine the characteristic constants for traveling waves, as surge-impedance and wave velocity, from the data of the transformer.
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Double Modal Transformation and Wind Engineering Applications

Journal of Engineering Mechanics, 2001
Modal transformation techniques are usually adopted in structural dynamics with the aim of de- coupling the equations of motion. They are based on the search for an abstract space in which the solution of the problem results simplified. Analogous transformation techniques have recently been developed with the aim of defining a space where a ...
CARASSALE, LUIGI, PICCARDO, GIUSEPPE, SOLARI, GIOVANNI   +2 more
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Parallel windings in multiwinding transformers

Electrical Engineering, 1954
THE GROWTH in size and complexity of power systems has resulted in a trend toward multiwinding transformers. A frequent consideration in the application of these multiwinding transformers is the possibility of paralleling secondary windings.
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Interleaved High-Voltage Transformer Windings

IEEE Transactions on Power Apparatus and Systems, 1978
Interleaved-turn high-voltage transformer windings are a useful alternative to continuous disc and layer windings for a wide range of transformer output and voltage ratings. Many configurations have been devised to meet different requirements. This paper reports the discovery that the original and most- commonly-used form of interleaved winding has an ...
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Helical winding’s magnetic field in power transformers

Electrical Engineering, 2009
Helical winding is typically used for low voltage and high current winding of large generator transformers. Due to its distinct design (spiral form, small number of turns and high current), some additional eddy-current losses may be expected. Differences in magnetic field produced by helical and cylinder windings are presented in this paper.
Valković, Zvonimir, Štih, Željko, Janić, Žarko   +2 more
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Cascaded open-end winding transformer based DVR

2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016
This paper introduces and generalizes a class of multilevel dynamic voltage restorer (DVR) for voltage sags/swells compensation of high-power sensitive loads. Such a device can improve the power quality of sensitive loads located in stiff systems.
Gregory Arthur de Almeida Carlos, Cursino Brandao Jacobina, Joao Paulo Ramos Agra Mello, Euzeli Cipriano dos Santos   +3 more
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Superconductive windings in power transformers

Journal of the Institution of Electrical Engineers, 1963
The superconducting elements exclude all magnetic field from their bulk and restrict conduction within a few hundred angstroms of their surface, but there are alloys in which d.c. superconduction occurs in depth. The paper examines the electromagnetic behaviour of both these forms of superconductor, and includes a description of the loss mechanism in ...
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Are transformer stabilizing windings necessary?

Electrical Engineering, 1959
FOR MANY YEARS it has been common practice to include a Δ-connected stabilizing winding in Y-Y-connected transformers and Y-connected autotrans-formers. This applies to 3-phase units of all types of core construction as well as 3-phase banks of single-phase units. The practice has been followed so closely for such a long time that it is generally taken
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Graded windings for pulse transformers

Proceedings of the IEE Part C: Monographs, 1962
The paper provides a comparison of conventional with graded windings used in pulse-transformer design. A conventional winding is defined as one in which the interlayer dielectric thickness is constant over the winding length, while the graded winding is defined as one in which the interlayer dielectric thickness varies linearly over the winding length.
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