Results 211 to 220 of about 76,373 (262)
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Cathode current distributions in an unbalanced magnetron
Surface and Coatings Technology, 2005Abstract The planar magnetron is extensively used as a sputtering source for a wide variety of target materials. Unfortunately, in some configurations, the target may have to be replaced when as little as 30% of its material had been sputtered [S. Schiller, U. Heisig, K. Goedicke, Thin Solid Films, 40 (1977) 327–334].
G.C.B. Clarke, P.J. Kelly, J.W. Bradley
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Pipe-Type Cable Losses for Balanced and Unbalanced Currents
IEEE Power Engineering Review, 2002Computations of pipe eddy current losses have been undertaken for balanced and unbalanced current using a program for transient nonlinear finite element analysis developed by one of the authors. Good agreement is obtained with experimental data from the literature.
J. Kuang, S.A. Boggs
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Current-Voltage Formulation of the Unbalanced Optimal Power Flow Problem
2020 8th Workshop on Modeling and Simulation of Cyber-Physical Energy Systems, 2020State estimation and optimal control approaches in power systems use a variety of sensors, to enable smarter distribution grid management. Such approaches can be cast as optimization models subject to the power flow physics. Kirchhoff's circuit laws are linear equations in current and voltage phasors for known branch impedance matrices, but nonlinear ...
Geth, Frederik +2 more
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Current Compensators for Unbalanced Electric Distribution Systems
2018 IEEE Electronic Power Grid (eGrid), 2018Inherent current imbalances are often present in electric distribution systems due to the increase of single-phase generation in the form of renewables and the existence of single-phase loads. The continued expansion of non-linear load usage is also increasing the levels of harmonics through the power transformers servicing these distribution systems ...
Vinson Jones +2 more
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Unbalanced lattice switched-current filters
ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196), 2002This paper shows how switched-current filters can be derived from passive filters obtained by the unbalancing of doubly terminated LC lattice structures. The process is similar to what would be done for the simulation of more conventional ladder structures, but the use of lattice prototypes allows the realization in an almost physically symmetrical ...
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Analysis of internal unbalancing current in distribution transformers
2015 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES), 2015Transformers are basically a static device with more than 95% efficiency. The major losses in transformers are copper loss and core loss. The minor losses are frictional and windage losses. But the formation of neutral current in the distribution transformers will create minor loss that will affect the efficiency of the transformer.
Rohikaa Micky +6 more
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Unbalanced Growth and the Sustainability of the Current Account Deficit
Review of International Economics, 2006AbstractIn an endogenous growth framework, a two‐country economy is modeled with an integrated product and asset markets. The countries differ with respect to the share of their GDP that is redistributed through the fiscal system, and the country where this share is smaller tends to grow faster.
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Current control scheme for unbalanced current distribution in a four-phase converter
2017 IEEE Conference on Energy Conversion (CENCON), 2017A multiphase DC-DC topology is mostly used for high current application in electric vehicles (EV), CPU processing circuit, communication systems and etc. Although this topology has an advantage of lower manufacturing costs and smaller in size. This topology, however, is susceptive to the unbalanced phase current issue which can cause malfunction to the
Jabbar A. F. Yahaya, Muhamad Mansor
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The unbalanced magnetron: current status of development
Surface and Coatings Technology, 1991Abstract There is now increasing industrial and scientific interest in magnetron sputtering cathodes which have a preferred strengthening or weakening of one of the poles such as to render them “unbalanced”. This configuration can lead to a higher degree of ionization in the vicinity of the work piece-substrate and much improved film properties. This
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Circulating Current Control in MMC Under the Unbalanced Voltage
IEEE Transactions on Power Delivery, 2013This paper proposes a control method for circulating currents in modular multilevel converters (MMCs) under unbalanced voltage conditions. Under balanced voltage conditions, only negative-sequence circulating currents exist. Consequently, the conventional method has considered only negative-sequence circulating currents in MMC.
null Ji-Woo Moon +4 more
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