Results 241 to 250 of about 228,508 (283)

Zigzag leakage of induction motors

Proceedings of the American Institute of Electrical Engineers, 1907
Various formulas have been given heretofore for the predetermination of the leakage coefficient of induction motors, but the results derived from these formulas are so divergent that the formulas themselves are rather discredited. It seems to the writer that the following study about the values of the zigzag leakage may help to clear this somewhat ...
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Skew leakage in induction machines

European Transactions on Electrical Power, 1994
AbstractMost induction motors have their rotor slots skewed, i. e. twisted away from the axial direction, with the intention to reduce harmful slot harmonic effects. As skewing affects the magnetic coupling between primary and secondary windings, also the fundamental harmonic performance is involved.
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Inductance characterization of high-leakage transformers

Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03., 2004
In this paper the inductances of high-leakage transformers are investigated by analysis, measurement, and finite-element simulation. Series-coupling tests, featuring differential coupling (series opposing) and cumulative coupling (series aiding), are conducted in addition to the standard open-circuit and short-circuit tests.
J.G. Hayes, N. O'Donovan, M.G. Egan, T. O'Donnell   +3 more
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On Determination of Leakage Inductances of Transformer Windings

Russian Electrical Engineering, 2019
Abstract—When designing a transformer structure and numerical simulation, it is needed to calculate the parameters of an equivalent circuit. One of the most important parameters is the leakage inductance of two windings or of their parts, the calculation of which can be relatively easily performed solely for simple cases of equal high windings.
A. V. Zhuikov, M. A. Kubatkin, V. S. Larin, D. A. Matveev, I. I. Nikulov   +4 more
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Analysis of the leakage inductance of planar transformer

2009 9th International Conference on Electronic Measurement & Instruments, 2009
In this paper, the leakage inductance of planar transformer is analyzed. The physical structure of the planar transformer discussed in this paper is introduced at first. Then the leakage magnetic field in the planar transformer is analyzed and the calculation formula of the leakage inductance is deduced.
Jianbing Li, Changchao Hu, Xuemin Pang
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A novel transformer with adjustable leakage inductance

International Journal of Applied Electromagnetics and Mechanics, 2017
Considering the challenge that the parameter of inductor is fixed and its adjustment is difficult in traditional power electronic circuit, herein we present a newly structural transformer with adjustable leakage inductance which integrates transformer and inductor. Its leakage inductance can be adjusted online.
Deng, Xianming, Cheng, En, Liu, Na, Li, Shaowu, Wang, Wenwen   +4 more
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Estimation of the leakage and magnetizing inductances of Induction Motors

2009
In addition to the IEEE standard test procedure for induction motors (IM), several advanced methods have been presented to achieve higher accuracy on parameters estimation. Some of them allow to estimate with high precision only a specific parameter, while others improve the parameters estimation at the price of high computational efforts and time due ...
CACCIATO, MARIO, CONSOLI A, SCARCELLA, Giuseppe, SCELBA, GIACOMO   +3 more
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Calculation of leakage inductance in transformer windings

IEEE Transactions on Power Electronics, 1994
A formula is presented to calculate mutual impedance between transformer windings on ferromagnetic cores. The formula is based on the solution of Maxwell's equations for coils on ferromagnetic cores and as such offers the ultimate in accuracy. The formula is frequency dependent, taking into account the effect of eddy currents in the core on the flux ...
W.G. Hurley, D.J. Wilcox
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A Novel Approach to Calculate Squirrel Cage Induction Motor Rotor Leakage Inductance

2006 Canadian Conference on Electrical and Computer Engineering, 2006
The end ring leakage inductance of an induction machine is computed either by using an empirical formula or by using very complicated mathematical techniques. In this paper, an alternate method to compute this inductance using Winding Function Approach (WFA) and three dimensional Finite Element (3DFE) using Maxwell is described. The method is deemed to
Qing Wu, Subhasis Nandi
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Computation of winding ends leakage inductance

1997 IEEE International Electric Machines and Drives Conference Record, 2002
A new half-analytical method is presented for the accurate calculation of the winding ends leakage inductance in rotating electrical machines with wound armatures, based on the integration of Maxwell's magnetic equations in the free space, magnetic images and surface distributions for modelling the effect of the slots and of the air gap.
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