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 paper, the authors successfully prepared FeSiAl powders passivated by aqueous phosphoric acid solution and studied the passivation process and magnetic properties, which confirmed that passivation and corrosion processes occur simultaneously and undergo competitive mechanism between them.
48 citations
09 Mar 2012
TL;DR: In this article, a coupled power inductor for high power-density integrated voltage regulators (IVR) is presented, where the orientation of anisotropy between successive laminations is rotated to provide an effectively isotropic core.
Abstract: Design and partial microfabrication of a coupled power inductor is presented for use in high power-density integrated voltage regulators (IVR). The proposed inductor uses many laminations of uniaxial, high-permeability magnetic material where the orientation of anisotropy between successive laminations is rotated to provide an effectively isotropic core. The high permeability core allows for an inductance density of 200nH/mm2, while coupling between phases prevents magnetic saturation and allows a current density as high as 11A/mm2 according to quasi-static finite-element-analysis (FEA) simulations. The coupling factor, inductance and resistance of the device are optimized for operation in a four-phase integrated buck converter switching at 100MHz.
48 citations
Patent•
02 Jun 1988
TL;DR: In this article, a three-legged transformer core embodiment is presented, where the primary winding is continuously wound on all three legs, while secondary windings are included on two of the legs.
Abstract: All the magnetic functions required in a ballast for a fluorescent lamp are integrated in a single, standard magnetic core which provides isolation, voltage step-up, ballasting, power factor correction and cathode heat for multiple lamps operating multiple lamps in an isolated-series configuration. In a three-legged transformer core embodiment, the primary winding is continuously wound on all three legs, while secondary windings are included on two of the legs. Ballasting inductance is provided by winding the primary on the third leg. The number of primary turns N p necessary to avoid saturation of the transformer for any specific input voltage and core material, the number of primary windings N p1 on the secondary legs and the number of primary windings N p2 on the third leg are determined according to the equation 2N p1 =N p -N p2 .
48 citations
Patent•
05 Sep 1969TL;DR: In this paper, a variable inductance device which has a magnetic core having two coils thereon, the two coils being not coupled magnetically to each other, is described, which is useful in tuned circuits of various electronic instruments.
Abstract: A variable inductance device which has a magnetic core having two coils thereon, the two coils being not coupled magnetically to each other. The inductance of one of the two coils is controlled by a DC current flowing through the other of said two coils. The device has a high Q-value, and a wide range of inductance is produced by a small DC current. The device is useful in tuned circuits of various electronic instruments.
48 citations
Patent•
17 Jul 2001TL;DR: A stator for a rotary machine includes a rotor 7 and a stator 8 having a stators iron core 15 disposed oppositely around the outer circumference of the rotor 7, and the stators stator coil 16 fitted around the metal core 15, with plural axially extending slots 15 a formed circumferentially at predetermined pitches as discussed by the authors.
Abstract: A stator for a rotary machine includes a rotor 7 and a stator 8 having a stator iron core 15 disposed oppositely around the outer circumference of the rotor 7 and a stator coil 16 fitted around the iron core 15, wherein the iron core 15 has a laminated iron core 150 with plural axially extending slots 15 a formed circumferentially at predetermined pitches, an insulating resin 100 is coated on an axial end face 15 f of the iron core 15 and an inner wall face of a slot 15 a in the laminated iron core 150 to provide insulation between the iron core 15 and the stator coil 16, and the iron core is cylindrically shaped by bringing both circumferential end portions 15 g of the laminated iron core 150 into contact to bend the laminated iron core 150 so that an opening face 15 b of the slot 15 a is directed inside
48 citations