Topic
Magnetic core
About: Magnetic core is a research topic. Over the lifetime, 30011 publications have been published within this topic receiving 155247 citations.
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TL;DR: In this article, a planar power inductor using composite core was fabricated and evaluated, which had a quasi closed magnetic circuit consisting of low permeability composite core and embedded 35-μm-thick, two-turn copper spiral coil.
Abstract: Our research objective is to realize the basic technology for a next generation package-level power grid (PLPG) for plural application large scale integrated circuits (LSIs). In this study, a carbonyl-iron powder (CIP)/epoxy composite magnetic core, for large-current power inductor used for the main dc-dc converter in the PLPG, has been fabricated and evaluated. 54 vol.%-CIP/epoxy composite core made by screen-printing had a relative permeability of 7.5 and loss tangent of about 0.03 at 100 MHz. The planar power inductor using composite core was fabricated and evaluated, which had a quasi closed magnetic circuit consisting of low permeability composite core and embedded 35-μm-thick, two-turn copper spiral coil. The fabricated inductor with a 1-mm-square in size had 5.5 nH inductance, Q-factor of 15 at 100 MHz, and 18 mΩ dc coil resistance. Inductance was constant even when the superimposed dc current increased up to around 5.5 A.
29 citations
TL;DR: In this paper, an apparatus for converting vibration energy into electric power is provided, in which vibration of a power source is transmitted to a power-generating coil 14, and is then transmitted to an iron core 20 via helical compression springs 26 and 28, thereby causing relative movement between the core 20 and the power generator coil 14 due to inertia, resulting in a change in the magnetic field.
Abstract: An apparatus for converting vibration energy into electric power is provided, in which vibration of a power source is transmitted to a power-generating coil 14 , and is then transmitted to an iron core 20 via helical compression springs 26 and 28 , thereby causing relative movement between the iron core 20 and the power-generating coil 14 due to inertia, resulting in a change in the magnetic field. An electromotive force is thus generated due to electromagnetic induction, thereby causing a current to flow to an electric wire material 18 . Specifically, use of vibration of the power source as energy for power generation can achieve efficient use of energy. The acquisition of electric energy by the power generation may also lead to mitigation of the vibration.
29 citations
Patent•
23 Aug 2010
TL;DR: In this article, an electromechanical generator for converting mechanical vibrational energy into electrical energy is described, consisting of a housing, an electrically conductive coil assembly fixedly mounted in the housing, a magnetic core assembly movably mounted in a housing for linear vibrational motion along an axis, and a first biasing device, mounted between the housing and the magnetic core, adapted to apply a centering force acting to oppose movement of the core assembly away from a central position on the linear axis.
Abstract: An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising a housing, an electrically conductive coil assembly fixedly mounted in the housing, a magnetic core assembly movably mounted in the housing for linear vibrational motion along an axis, a first biasing device, mounted between the housing and the magnetic core assembly, adapted to apply a centering force acting to oppose movement of the magnetic core assembly away from a central position on the linear axis and a second magnetic biasing device adapted to provide a compensating force to compensate for variations in the centering force of the first biasing device due to temperature.
29 citations
Patent•
IBM1
TL;DR: In this paper, a rectangular thin film transducer head includes a magnetic core composed of overlapping laminations of permalloy film joined together magnetically and electrically near an air gap, at one end of the rectangle, between the two Laminations, which gap couples flux to the magnetic recording medium.
Abstract: A rectangular thin film transducer head includes a magnetic core composed of overlapping laminations of permalloy film joined together magnetically and electrically, near an air gap, at one end of the rectangle, between the two laminations, which gap couples flux to the magnetic recording medium. Two electrically parallel insulated thin film copper windings starting at the end opposite the gap are deposited about the core joining electrically at the end adjacent to the gap to a conductor coupled to both permalloy laminations which conduct return current through the legs of the core inside of the windings. Alternatively, a single series winding passes around the core and through the gap. The head is manufactured by means of photolithographic, vacuum, and thin film techniques.
29 citations
TL;DR: In this paper, core losses of an 18.5 kW asynchronous motor were measured and computed by means of a suitable electromagnetic fields package, improved for core loss calculation, and the results showed that a 1 to 3% improvement in efficiency was possible by replacing the conventional soft laminations by new materials.
Abstract: Core losses of an 18.5 kW asynchronous motor were measured and computed, by means of a suitable electromagnetic fields package, improved for core loss calculation. The results show that a 1 to 3% improvement in efficiency is possible by replacing the conventional soft laminations by new materials. The differences between measurement and computation are mainly attributed to rotating fields inside the stator.
29 citations