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| Number | Title | Issue Date |
| 7385466 | Differential transmission circuit and common mode choke coil A first transmission line for transmitting a first signal and a second transmission line for transmitting a second signal, which has the reverse phase of the first signal, are connected in series with a common mode choke coil. A third transmission line and fourth tr... | 06/10/2008 |
| 7352269 | Method for making magnetic components with N-phase coupling, and related inductor structures Methods and structures for constructing a magnetic core of a coupled inductor. The method provides for constructing N-phase coupled inductors as both single and scalable magnetic structures, where N is an integer greater than 1. The method additionally describes how... | 04/01/2008 |
| 7271695 | Electromagnetic apparatus and method for making a multi-phase high frequency electromagnetic apparatus An electromagnetic apparatus includes: (a) A magnetic material arranged in a core structure establishing a first flux path set and a second flux path set; the first flux path set includes a first middle flux path oriented about a first axis and two first side flux p... | 09/18/2007 |
| 7142081 | Multiple three-phase inductor with a common core An electrical inductor assembly has a plurality of three-phase inductors on a common core. Each inductor includes three coils wound around separate legs of the core. Core bridges extend across the legs to provide an inter-leg path for the magnetic flux produced by e... | 11/28/2006 |
| 7136293 | Full wave series resonant type DC to DC power converter with integrated magnetics A full wave DC/DC converter magnetically integrates into the transformer assembly the functions of the resonant inductor, magnetizing inductor and the output filter inductor. The primary and the secondary windings are assembled on a gapped center leg of an E-core, w... | 11/14/2006 |
| 7038899 | EMI suppression device An electromagnetic interference (EMI) suppression device includes a case, a common mode noise reduction element, a plurality of conductive pillars and at least one differential mode noise reduction element. The case includes a housing that can accommodate the common... | 05/02/2006 |
| 6873237 | Core structure There is disclosed a core structure with a very low profile, high power density and lower losses. Higher core surface area and improved core utilization in terms of flux density are other desirable feature in the disclosed design. The disclosed design also allowed f... | 03/29/2005 |
| 6856230 | Harmonic filtering circuit with special transformer A filter uses a special autotransformer that has a ferromagnetic core with a plurality of legs and flux return bars. A first coil is located on one leg, and a second coil is located on the same leg, but spaced from the first coil. The first coil and at least part of... | 02/15/2005 |
| 6774758 | Low harmonic rectifier circuit Non-linear inductor(s) are used to reduce the percent total harmonic distortion of the harmonics in the line currents in the input side rectifier system of an ac drive system. Several constructions for the non-linear inductor(s) are described. The non-linear inducto... | 08/10/2004 |
| 6753752 | Silicon steel core spacing structure for improving induction A silicon steel core spacing structure for improving induction comprises a shielded copper spacer between the magnetic flux sections of two silicon steel core, and the magnetic reluctance of such copper spacer is relatively low that can guide the traveling path of t... | 06/22/2004 |
| 6744343 | Flyback transformer mounting structure for video apparatus A flyback transformer is mounted on a main wiring board formed with a power circuit. A mounting bracket shaped like an L-character in plan view is integrally molded on a chassis. A mounting portion disposed at the top of the flyback transformer is fixed by screws to... | 06/01/2004 |
| 6683524 | Transformer core A transformer core comprises at least one leg and at least one yoke part, wherein the cross section of the leg or the legs regularly multi-edged with more than four edges. The core is made up of rings rolled from strips of constant width, whereby good ele... | 01/27/2004 |
| 6583699 | Magnetic material and inductor A magnetic material includes main components having Fe2 O3 of 46.0 to 51.0 mol %, CuO of 0.5 to 15.0 mol % and the rest being NiO. With respect to the main components of 100 wt parts, additives are added. The additives are bismuth ox... | 06/24/2003 |
| 6525638 | Choke coil A choke coil includes a magnetic bobbin, windings, and a magnetic connecting member. The bobbin has a winding member. End flange portions are provided at both ends of the winding member, and a center flange portion is provided at the approximate center th... | 02/25/2003 |
| 6400249 | Transformer providing low output voltage A transformer providing low output voltage. A transformer core has two outer leg portions and a center portion. A primary winding has a first portion looped around one of the legs so that a current passed through the first winding will produce a magnetic ... | 06/04/2002 |
| 6137391 | Flux-controlled type variable transformer A flux-controlled variable transformer can control voltage at a high speed without using any voltage adjusting tap. The transformer has a first and second magnetic circuits. The first magnetic circuit is composed of a first and second U-cut cores (13 and ... | 10/24/2000 |
| 6091211 | Mis-convergence correction device A mis-convergence correction device includes a first controlled coil unit, a second controlled coil unit, a controlling coil unit, and a coil holder. The first controlled coil unit includes first and second drum cores and a first controlled coil. Each of ... | 07/18/2000 |
| 6014071 | Choke coil A choke coil for preventing harmonic distortions having a plurality of laminated iron core sheets formed into a core. A first coil is wound around a first limb of a first core, and a second coil is wound around a first limb of a second core. A third coil ... | 01/11/2000 |
| 5994992 | Choke coil A choke coil is provided having a highly efficient normal-mode inductance component. The choke coil comprises a bobbin, a magnetic core, and a pair of windings. The bobbin has a core portion, and flanges which are respectively provided at both outer ends ... | 11/30/1999 |
| 5912553 | Alternating current ferroresonant transformer with low harmonic distortion An AC ferroresonant transformer includes a core having a closed loop path and a magnetic shunt assembly extending between portions of the core. A primary winding, a secondary winding and a tertiary winding are disposed on the core to link with magnetic fl... | 06/15/1999 |
| 5825272 | Choke coil for suppressing common-mode noise and normal-mode noise A choke coil is disclosed which exhibits sufficient capability in suppressing both common-mode noise and normal-mode noise with a small number of parts. A bobbin is formed of a rod and flanges provided for the rod. A pair of windings are reeled around the... | 10/20/1998 |
| 5635890 | Choke coil A choke call includes a bobbin, a pair of windings wound around the bobbin, and two magnetic cores. The bobbin has a rectangular barrel in which a circular hole is defined. The two magnetic cores are partly inserted into the hole of the barrel. The hole i... | 06/03/1997 |
| 5629661 | Choke coil for eliminating common mode noise and normal mode noise A choke coil having a sufficient noise eliminating effect against common mode and normal mode noises. The choke coil has a bobbin, a pair of windings wound around the bobbin, and magnetic cores inserted in a rectilinear body portion of the bobbin. The bob... | 05/13/1997 |
| 5581224 | Choke coil for eliminating common mode noise and differential mode noise A choke coil which functions not only to eliminate common mode noise but also to eliminate differential mode noise. A couple of coils are wound around a circular first core and a second core which is disposed inside the circular first core. The second cor... | 12/03/1996 |
| 5537089 | Three phase transformer with reduced harmonic currents A transformer comprising a core, a plurality of primary coils and a plurality of secondary coils, the core having three sections arranged in a generally triangular configuration forming three vertices, the coils being disposed on the core about respective... | 07/16/1996 |
| 5525951 | Choke coil Two coils 3a, 3b are wound over adjacent portions of a first magnetic core having two closed magnetic circuits and a second magnetic core. The winding directions of the two coils are set so that the magnetomotive forces generated by both coils may cancel ... | 06/11/1996 |
| 5506559 | Choke coil for eliminating common mode noise and normal mode noise A common mode choke coil has a couple of coils, a magnetic frame in which the coils are encased, the magnetic frame forming closed magnetic circuits around the respective coils, and a magnetic core which pierces through the magnetic frame. The frame is ma... | 04/09/1996 |
| 5481238 | Compound inductors for use in switching regulators Compound inductors for use in switching regulators have two or more symmetrically coupled windings so the component size is reduced as well as a reduction in power losses compared with conventional inductors. The compound inductors may be used in buck and... | 01/02/1996 |
| 5422620 | Transformer The so-called delta-phi transformer makes use of the effects of various core materials and air gap sections in the cores on the magnetization curves of core materials. It consists of at least two magnetically separated cores, designated source core SK and... | 06/06/1995 |
| 5412253 | IC memory card with non-contact power and data connection A non-contact electrical transformer coupling is disclosed that provides electrical power and full duplex digital communications between a host computer and a removable IC memory card. A unique two-part host magnetic core assembly having a quadrafid desig... | 05/02/1995 |
| 5394319 | Non-coupled integrated magnetic structure An integrated, non-coupled structure comprises a body of ferrite material with a plurality of through passages. A plurality of conductors pass through respective ones of the passages to form windings, certain of which have no magnetic field coupling and h... | 02/28/1995 |
| 5363035 | Phase controlled transformer An operator controllable transformer having a shunt magnetic path with a control coil is provided. The transformer includes phase control circuitry to control the output of the transformer by phase controlling current flow in the shunt coil, thereby contr... | 11/08/1994 |
| 5359314 | Core and coil assembly for an amorphous-steel cored electric transformer This transformer core and coil assembly comprises (a) a low voltage coil surrounding a coil window and including first and second coil legs on opposite sides of the coil window, (b) a first plurality of side-by-side amorphous-steel core loops surrounding ... | 10/25/1994 |
| 5229652 | Non-contact data and power connector for computer based modules The invention discloses a non-contact way to provide electrical power and two-way digital communications between a host computer and its peripheral modules, such as IC memory cards, modems, and A/D converters. A special magnetic core is employed to provid... | 07/20/1993 |
| 5182535 | Summing transformer core for star-delta inverter having a separate secondary winding for each primary winding A summing transformer for a star-delta inverter having a separate secondary winding for each primary winding for use in inverting variable frequency AC power into constant frequency AC power, the transformer comprising a plurality of core sections having ... | 01/26/1993 |
| 5177460 | Summing transformer for star-delta inverter having a single secondary winding for each group of primary windings A summing transformer for a star-delta inverter having a single secondary winding for each group of primary windings for use in inverting variable frequency AC power into constant frequency AC power, the transformer comprising a plurality of core elements... | 01/05/1993 |
| 5053738 | Magnetic leakage transformer A magnetic leakage transformer includes a paired cores each having five straight legs extending in the same direction from a common back beam, and associated with each other so that the leg's ends are opposed to each other with magnetic gaps between the p... | 10/01/1991 |
| 5003277 | Phase-shifting transformer with a six-phase core A phase-shifting transformer including main and series transformer units comprises a six-phase core including six independent magnetic circuits, numbered first through sixth from right to left. The combined U-, V-, and W-phase windings of the main transfo... | 03/26/1991 |
| 4975670 | Air cooled transformer A variable speed, constant frequency generating system has a neutral forming autotransformer connected between a variable speed generator and an AC to AC converter. The converter includes a three phase, full wave rectifier with positive and negative rails... | 12/04/1990 |
| 4943763 | Ferroresonant transformer with dual outputs A ferroresonant transformer having dual outputs electrically and magnetically isolated from one another. The transformer includes a core, a primary coil on the core adapted to be connected to a source of alternating current, and two pairs of secondary win... | 07/24/1990 |
