Results 11 to 20 of about 198,967 (348)
Generating arbitrary topological windings of a non-Hermitian band [PDF]
Science, 2020 Topology in the open Controlling the topology of a system provides a route to develop devices that are robust against defects. Whereas earlier developments of topological band theory focused on Hermitian (closed) systems, recent efforts have been toward ...
Kai Wang +5 more
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IEEE Transactions on Transportation Electrification, 2022 The rapidly increasing demand on power density levels of electric vehicle (EV) drive systems is pushing the boundaries of traction motor performance. Hairpin windings are becoming a popular option for EV motors due to their reduced dc losses and improved
T. Zou +8 more
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Hairpin Windings: An Opportunity for Next-Generation E-Motors in Transportation
IEEE Industrial Electronics Magazine, 2022 Advances in electrical machines and power electronics (PEs) are helping to achieve the power density and efficiency required by the transportation sector. However, the reliability of components and production processes is a challenge.
S. Nuzzo, D. Barater, C. Gerada, P. Vai
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IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021 The short rise time observed in the PWM voltages generated by ultrafast wide bandgap devices increases the amplitude of voltage harmonics at higher frequencies.
A. Cremasco +3 more
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IEEE transactions on industrial electronics (1982. Print), 2021 Modeling of convection heat-transfer at the end-windings for thermal networks using lumped-parameters has been widely discussed in the literature. Unfortunately, the resulting coefficients are highly influenced by the end-winding shape, the area in the ...
A. Tovar-Barranco +3 more
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Machines, 2023 This article, besides offering data of great value for any designer of high-power short-circuits of special three-winding design, illustrates the correlation with the corresponding FRA measurements, validating this type of measurement.
Cristian-Eugeniu Sălceanu +5 more
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‘Wind, Wind, Wind, Always Winding Am I’: Dickens’s Metafictional Clockwork
The Review of English Studies, 2022 Abstract This article considers the importance of timepieces and clockwork to Dickens’s conception of composition. Whilst the many clocks and watches that saturate his writing have often been read as indicative of an interest in time, the present study considers what the materiality of timepieces—namely, their markets and mechanisms ...
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The Journal of Engineering, 2019 The thermal design-analysis of devices with electrical windings impregnated using varnish materials is frequently challenging. This is due to difficulties in predicting theoretically the equivalent thermal properties for the composite materials, such as ...
Haipeng Liu +3 more
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Augmented Models of High-Frequency Transformers for SMPS [PDF]
, 2009 The modeling of high-frequency transformers via augmented equivalent circuits is addressed. The augmented models are composed of a low-frequency equivalent and a supplemental element modeled via real rational fitting. They offer both high accuracy levels
Canavero, Flavio +3 more
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Science, 2011 Climate Science Increasing concentrations of greenhouse gases in the atmosphere, emitted by human activities, have caused Earth's climate to warm. Climate warming has been linked to a host of other environmental changes, one of the most evident being an increase in the amount of water present ...
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