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Magnetic core

About: Magnetic core is a research topic. Over the lifetime, 30011 publications have been published within this topic receiving 155247 citations.


Papers
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Proceedings ArticleDOI
08 Dec 1996
TL;DR: In this article, a new magnetic sensor based on the Hall effect, sensitive to a cylindrical magnetic field, is presented, which is found around a wire carrying a current or under the gap between magnetic concentrators.
Abstract: We present a new magnetic sensor based on the Hall effect, sensitive to a cylindrical magnetic field. Such a field is found around a wire carrying a current or under the gap between magnetic concentrators. Compared to traditional (plate-like) Hall devices, the geometry of the cylindrical Hall device allows lower bias voltage and lower offset to be achieved. The combination of this new device with integrated magnetic concentrators results in a very high detectivity magnetic sensor.

47 citations

Journal ArticleDOI
TL;DR: In this article, a magnetic photocatalyst is prepared by coating a magnetic core with a dual layer of inert silica (SiO2) and photoactive titania (TiO2).
Abstract: A magnetic photocatalyst is prepared by coating a magnetic core with a dual layer of inert silica (SiO2) and photoactive titania (TiO2). The complete photoactive TiO2 shell is directly formed on the SiO2-coated magnetic spheres. Subsequent hydrothermal treatment improves the degree of crystallinity of TiO2. TiO2/SiO2-coated magnetic spheres show good photocatalytic activities in the degradation of methylene blue in the aqueous solution. The photocatalytic TiO2 surface shell is electrically insulated by the intermediate SiO2 layer from the magnetic core to maintain good photocatalytic activity of the TiO2 shell. The magnetic photocatalyst can be easily recovered by applying external magnetic field.

47 citations

Patent
20 Feb 2001
TL;DR: In this paper, a pair of stacked spiral inductors is increased by adding a layer of magnetic material between the stacked inductors, which acts as barrier that confines electronic noise generated in the spiral inductor to the area occupied by the inductor.
Abstract: A spiral inductor fabricated above a semiconductor substrate provides a large inductance while occupying only a small surface area. Including a layer of magnetic material above and below the inductor increases the inductance of the inductor. The magnetic material also acts as barrier that confines electronic noise generated in the spiral inductor to the area occupied by the spiral inductor. Inductance in a pair of stacked spiral inductors is increased by including a layer of magnetic material between the stacked spiral inductors.

47 citations

Journal ArticleDOI
TL;DR: In this paper, the authors presented the analysis and development of two novel three-phase switched reluctance motors (SRMs) with hybrid magnetic paths comprising six E-shaped modular stators and three segmental common rotors for electric vehicle applications.
Abstract: The classical switched reluctance motors (SRMs) often suffer from drawbacks such as low power and torque densities, high torque ripple, mutual coupling, etc., which limit their industrial applications. This paper presents the analysis and development of two novel three-phase SRMs with hybrid magnetic paths comprising six E-shaped modular stators and three segmental common rotors, termed as the modular SRMs (MSRMs), for electric vehicle applications. The machine topologies with different winding arrangements are described. The voltage and output power equations are analytically derived, and some design particularities and parameters are discussed. The field distributions and static magnetic characteristics of an MSRM with double coil are analyzed by using 3-D finite-element method. After that, two MSRMs with different winding arrangements, namely a double-coil MSRM and single-coil MSRM, are analyzed and compared to evaluate the distinct features of this novel MSRM, accompanied with a classical three-phase 6/4 SRM. The comparison includes static magnetic characteristics, mass of iron core, normal dynamic, and fault-tolerant performances. It is shown that the double-coil MSRM appears to have better characteristics such as higher torque production capability, lower torque ripple and cost, higher torque and output power densities, and higher reliability and fault tolerance. For experimental verification, laboratory testing of a double-coil MSRM is developed, and the simulated and measured static inductance characteristics and dynamic performances correlate well.

47 citations

Patent
27 Feb 2003
TL;DR: In this article, a power supply using bare die power FETs which are directly mounted to a thermally conductive substrate by a solder attachment made to the drain electrode metallization on the back side of the FET is presented.
Abstract: A packaging system for a high current, low voltage power supply. The power supply uses bare die power FETs which are directly mounted to a thermally conductive substrate by a solder attachment made to the drain electrode metallization on the back side of the FETs. The source electrode and gate electrode of each FET are coupled to the circuitry on an overhanging printed circuit board, using CSP solder balls affixed to the front side of the FET die. The heat generated by the FETs is effectively dissipated by the close coupling of the FETs to the thermally conductive underlying substrate. High interconnect densities are achieved through the use of a multilayer printed circuit board. This high interconnect density, with the addition of a magnetic core element, allows the power supply packaging system to incorporate transformer windings for an isolation transformer or an inductor.

47 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202365
2022163
2021309
2020900
20191,254
20181,426