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| Number | Title | Issue Date |
| 7932803 | Wire-wound type coil and winding method therefor A common-mode choke coil includes a magnetic core, external electrodes, first and second wires, and a magnetic top. The magnetic core includes a winding core section and first and second flange sections. The external electrodes are provided on the first and second f... | 04/26/2011 |
| 7924134 | Inductor packaging for power converters A vehicular power converter includes switches and first and second inductive components. The first and second inductive components have substantially adjacent portions and are coupled to the plurality of switches such that when current flows from the plurality of sw... | 04/12/2011 |
| 7847671 | Subsea data and power transmission inductive coupler and subsea cone penetrating tool A subsea data and power transmission apparatus includes primary and secondary open magnetic circuits with coils for wireless data and power transfer between a drilling tool and a drilling rig. The primary magnetic circuit is U-shaped and the secondary is O-shaped. B... | 12/07/2010 |
| 7830237 | Transformer A transformer includes an iron core having a shaft around which a plurality of coil modules is mounted. Each coil module includes spiral, upper and lower coil sections each having an outer loop and a plurality of inner loops received in and coplanar with the outer l... | 11/09/2010 |
| 7498922 | Self-damped inductor An inductor with self-damping properties for use in multiple applications including for high power broadband frequency applications is provided by a coil having an input end and an output end and wound about a core of magnetically permeable material and an eddy curr... | 03/03/2009 |
| 7443278 | Coil device, composite coil device, and transformer device A transformer-type compact and thin coil device having a high coupling degree between a primary coil and a secondary coil, and a transformer device in which a plurality of sets of the transformer-type coil devices are incorporated. A coil device includes a first win... | 10/28/2008 |
| 7432794 | Variable integrated inductor A variable integrated inductor is described herein which has an inductance value that can be switched between two or more values. In the preferred embodiment, the variable integrated inductor includes a multi-loop primary inductor which is electromagnetically couple... | 10/07/2008 |
| 7362206 | Variable transformer A variable transformer has an effective turns ratio that can be varied by electronic switching. By varying the effective turns ratio, the output voltage can be controlled precisely for a varying input voltage and load regulation. The variable transformer is a modula... | 04/22/2008 |
| 7317374 | Self-damped inductor An inductor with self-damping properties for use in multiple applications including for high power broadband frequency applications is provided by a coil having an input end and an output end and wound about a core of magnetically permeable material and an eddy curr... | 01/08/2008 |
| 7265650 | Power factor correction rectifier having independent inductive components A PFC circuit comprises a first converter and a second converter and a multi-port electromagnetic device. The first converter has a first inductive element and the second converter has a second inductive element. The multi-port electromagnetic device comprises a fir... | 09/04/2007 |
| 7256678 | Magnetically controlled inductive device A controllable inductor, comprising first and second coaxial and concentric pipe elements, where said elements are connected to one another at both ends by means of magnetic end couplers, a first winding wound around both said elements, and a second winding wound ar... | 08/14/2007 |
| 7194799 | Process for fabricating a high density multi-layer microcoil A high density multi-layer microcoil includes a substrate, a multi-layer coil winding, a magnetic core and a dry film photoresist structure. The multi-layer coil winding and the magnetic core are supported by the dry film photoresist structure. The fabrication proce... | 03/27/2007 |
| 7161458 | Electromagnetic device having independent inductive components A multi-port electromagnetic device comprises a first magnetic core having a first closed flux path and a second magnetic core having a second closed flux path, with the first closed flux path being independent from the second closed flux path. At least one first wi... | 01/09/2007 |
| 7111271 | Inductive filters and methods of fabrication thereof A series of plated through hole (PTH) vias are interconnected by traces that alternate between a top surface and a bottom surface of a dielectric board. The PTH vias in the series can be positioned to create a collinear inductive filter, a coil-type inductive filter... | 09/19/2006 |
| 7061356 | Controllable transformer A controllable transformer device comprising a body of a magnetic material, a primary winding wound round the body about a first axis, a secondary winding wound round the body about a second axis at right angles to the first axis, and a control winding wound round t... | 06/13/2006 |
| 7034648 | Amorphous metal core transformer An amorphous metal core transformer is provided with a plurality of wound magnetic cores composed of amorphous metal strips, and a plurality of coils, each of the coils including a primary coil and a secondary coil, each of the coils further including a bobbin. The ... | 04/25/2006 |
| 7026905 | Magnetically controlled inductive device A controllable inductor, comprising first and second coaxial and concentric pipe elements, where said elements are connected to one another at both ends by means of magnetic end couplers, a first winding wound around both said elements, and a second winding wound ar... | 04/11/2006 |
| 7023311 | Overlapped superconducting inductive device An electrical device operating on the principle of induction, such as a transformer. The device employs High Temperature Superconductors to build pancake coils having a very low height to diameter ratio. These pancake coils are placed around ferromagnetic core legs ... | 04/04/2006 |
| 7005920 | Programmable passive inductor A programmable passive inductor includes two inductors or coils, each having a self-inductance, magnetically coupled together and having a mutual inductance proportional to a magnetic coupling factor. The relative magnitude of the currents through the two inductors ... | 02/28/2006 |
| 7000315 | Method of making photolithographically-patterned out-of-plane coil structures An out-of-plane micro-structure which can be used for on-chip integration of high-Q inductors and transformers places the magnetic field direction parallel to the substrate plane without requiring high aspect ratio processing. The photolithographically patterned coi... | 02/21/2006 |
| 6911777 | Clamp-on low power isolation transformer for airfield lighting A clamp-on isolation transformer for an airfield lighting fixture in an airfield lighting system includes a first portion configured to receive a portion of a primary conductor of a primary current loop and a second portion configured to receive another portion of t... | 06/28/2005 |
| 6753515 | Induction heating type fixing device for an image forming apparatus and induction heating coil therefor An induction heating type fixing device for an electrophotographic image forming apparatus is disclosed. An inducting heating coil has a plurality of bobbins each having a particular diameter and assembled in a telescopic manner. A particular conductor is wound roun... | 06/22/2004 |
| 6667536 | Thin film multi-layer high Q transformer formed in a semiconductor substrate A thin-film multi-layer high Q transformer. To form an outer transformer winding a plurality of parallel first level metal runners are formed in a first insulating layer overlying the semiconductor substrate. A plurality of vertical conductive vias are fo... | 12/23/2003 |
| 6624596 | Device for lighting discharge lamp The discharge lamp lighting device according to the present invention is provided with a high-voltage generating transformer which comprises a core, a secondary winding part disposed in a plurality of sections on the outside of the core, and a primary win... | 09/23/2003 |
| 6429598 | Transformer and control units for ac control A transformer unit connects to an ac outlet and provides ac controlled by an opto-coupled triac to another ac outlet. The transformer unit includes a transformer and a third connector for connection to a control unit separate from the transformer unit. Th... | 08/06/2002 |
| 6388380 | Electric discharge lamp lighting unit An electric discharge lamp lighting device wherein a high voltage generating transformer 10 comprises a secondary coil 13 wound on an outer side of a laminated core 12 disposed in the center of a bobbin 11 and a primary coil 14 wound on an outer side of s... | 05/14/2002 |
| 6366023 | Starter modules for motor vehicle headlight discharge lamps A starter module for a discharge lamp, especially for a motor vehicle, includes a high tension transformer which has a magnetic circuit component such as an annular core, on which a primary winding (1b) and a secondary winding are wound. The transformer f... | 04/02/2002 |
| 6328025 | Ignition coil with driver An ignition coil having a core with a first leg and a second leg, a first primary winding arranged over the first leg, a second primary winding arranged over the second leg, a first secondary winding arranged over the first primary winding, a second secon... | 12/11/2001 |
| 6291759 | Pickup for electric guitars, and method of transducing the vibrations of guitar strings Guitar pickups are provided herein comprising an upper bobbin, a ferromagnetic steel plate and a lower bobbin, stacked on top of each other, oriented longitudinally and laterally substantially the same, and held together by ferromagnetic screws. An upper ... | 09/18/2001 |
| 6291758 | Pick-up for electric guitars A pickup has an upper bobbin which is elongated along a longitudinal plane, a lower bobbin which is elongated along the longitudinal plane, permanent magnetic pole pieces situated within holes in the upper and lower bobbins, screws holding said bobbins to... | 09/18/2001 |
| 6168696 | Non-knurled induction coil for ionized metal deposition, sputtering apparatus including same, and method of constructing the apparatus An RF induction coil for inductively coupled ionized sputtering applications having at least one extremely smooth surface, on the order of about 30 μm or less, which faces, substantially resides within, or is immediately proximate a plasma field in a spu... | 01/02/2001 |
| 6144019 | Inductor for an induction cooking area An inductor module for disposition below a cooking area plate of an inductor cooking area is disclosed. The inductor module includes a plate-shaped substrate and at least two inductor coils including a first inductor coil and a second inductor coil formed... | 11/07/2000 |
| 6137393 | Power cord provided with a power cord transformer A power cord transformer includes a core of ferromagnetic material, a primary coil and a secondary coil both provided around the core. The core and coils have such a shape that the distance between two points on the primary coil and also the distance betw... | 10/24/2000 |
| 6111366 | Ignition transformer for gas discharge bulbs An ignition transformer for gas discharge bulbs, or tubes, including a core, a primary coil, and a secondary coil. The transformer windings are wound axially along a rod-shaped core (1). The secondary winding includes two or more mutually concentric and a... | 08/29/2000 |
| 6084499 | Planar magnetics with segregated flux paths A planar-type magnetic structure in which two coils, on two poles of the same core, are separated by an open space which is wide enough and low enough that the air return flux, through the open space, completes the flux circuit for each coil. Thus the cou... | 07/04/2000 |
| 6060973 | Slant winding electromagnetic coil and ignition coil for internal combustion engine using same An electromagnetic coil which may be employed as an ignition coil for an internal combustion engine is disclosed. The electromagnetic coil includes a lower voltage winding portion and a higher voltage winding portion. The lower voltage winding portion is ... | 05/09/2000 |
| 5956073 | Noise-limiting transformer apparatus and method for making Embodiments of the invention include a transformer device having a saturation region for limiting ingress noise and other noise. The transformer comprises a magnetic core, an input coil and an output coil arranged so that the output signal caused by the m... | 09/21/1999 |
| 5952893 | Integrated circuit inductors for use with electronic oscillators An integrated circuit having at least the following: a substrate; a composite inductor formed within the substrate having at least a first coil with an associated first coil inductance and first coil resistance and a second coil with an associated second ... | 09/14/1999 |
| 5912609 | Pot-core components for planar mounting A coil component comprises a pot core having through holes formed in the bottom, a coil so shaped as to fit in the pot core, and a cover core joined to the rim of the pot core. The coil has terminals inserted in the through holes to such an extent that th... | 06/15/1999 |
| 5656849 | Two-level spiral inductor structure having a high inductance to area ratio A high-Q monolithic inductor structure formed using conventional silicon technology and having a first complete lower inductor spiral formed on a substrate and a second complete upper formed on a insulating layer over the first inductor spiral. Central po... | 08/12/1997 |
