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| Number | Title | Issue Date |
| 7999647 | Apparatus, system, and method for an integrated winding structure for a magnetic core An apparatus, system, and method are disclosed for combining multiple windings on a magnetic core. An integrated winding structure has a winding base and multiple winding extensions. The multiple winding extensions and the winding base are formed from a single sheet... | 08/16/2011 |
| 7969269 | Pick-up apparatus for inductive power transfer systems An Inductive Power Transfer (IPT) pick-up apparatus includes a magnetically permeable core, a first coil, being wound about the core so as to be inductive coupled therewith such that a current induced in the first coil is most sensitive to a first directional compon... | 06/28/2011 |
| 7961072 | Inductive element An inductive element comprises at least two core-parts including a magnetically permeable material and at least one winding of an electrical conductor which can be a foil winding, a stranded wire (litz) winding or a conventional wire winding. Each core-part has an e... | 06/14/2011 |
| 7940152 | Multi-primary and distributed secondary transformer for power amplifier systems A multi-primary and distributed transformer is provided for one or more sets of parallel-connected or series-connected power amplifiers. The transformer may include a plurality of primary windings, including a first primary winding, a second primary winding, a third... | 05/10/2011 |
| 7924130 | Isolation magnetic devices capable of handling high speed communications An isolation magnetic device produced by inserting a first end of a wire through a first hole of a core, wrapping the first end of the wire around a first side of the core and inserting the first end of the wire through a second hole of the core. The second hole of ... | 04/12/2011 |
| 7915988 | Field coil assembly of electromagnetic clutch for compressor The present invention relates to a field coil assembly of an electromagnetic clutch for a compressor. The present invention comprises a core 210, and a coil 240 installed to the core 210 and formed by winding a unit wire 250. At this time... | 03/29/2011 |
| 7902952 | Shared reactor transformer In order to additionally furnish the transformer with the reactor capability easily without having to change the structure of the transformer, a transformer is formed by winding an input-side coil 1b and output-side coils 1a and 1 | 03/08/2011 |
| 7898377 | Switching power converter for suppressing common mode noise The present invention discloses a switching power converter with low common mode noise. The switching power converter comprises at least a switch with at least a terminal wherein said switch turning on and off alternatively which generates a plurality of noise volta... | 03/01/2011 |
| 7847664 | Electromagnetic apparatus using shared flux in a multi-load parallel magnetic circuit and method of operation A flux sharing magnetic circuit has a parallel arrangement of secondary electromagnetic circuits with independent loads. An AC driven primary delivers current to the secondary circuits to maintain charge in their batteries. The batteries deliver DC current to the lo... | 12/07/2010 |
| 7839251 | Filtering choke arrangement for a frequency converter Three-phase AC or two-phase DC choke arrangement of a frequency converter, in which is a magnetic core, in which are the phase-specific pillars of the AC choke arrangement or the branch-specific pillars of the DC choke arrangement (1a, 1b... | 11/23/2010 |
| 7808354 | Magnetic element A magnetic element includes a first wire, a second wire, a third wire, a fourth wire and a first single-strand wire. The first wire is disposed at a first side of the magnetic element, and has a first end and a second end. The second wire is disposed at the first si... | 10/05/2010 |
| 7750785 | Coil frame capable of connecting with another coil frame Coil frames and transformers are provided. A coil frame includes a sub-coil-frame and an extended frame. The sub-coil-frame is utilized for winding a metal coil thereon. The extended frame is attached to the sub-coil-frame. The extended frame has a hole and a protru... | 07/06/2010 |
| 7564334 | Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components A transformer having input and output windings. A sample transformer includes an input winding wound around a core. The input winding has a first end and a second end. An output winding is also wound around the core. The output winding has a first end and a second e... | 07/21/2009 |
| 7443276 | Electromagnetic coupling galvanic isolated digital output circuit with output feedback A galvanic isolated digital output circuit of a digital system is provided herein, which utilizes an electromagnetic coupling device for galvanically isolating the system side and the output side of the digital output circuit. The digital output circuit contains a s... | 10/28/2008 |
| 7439843 | Transformers A transformer includes at least two magnetically coupled cores with a common axis. The cores have cross sectional configurations transverse to the common axis which are not rectangular. An exciting voltage is to be applied across a first winding provided on one of t... | 10/21/2008 |
| 7436279 | High voltage transformer The invention relates to a high voltage transformer having a double symmetric winding arrangement. The transformer comprises a closed core (10) having a first and a second leg (12, 14), a first and a second coil member (16; 18) having a first en... | 10/14/2008 |
| 7417522 | High voltage transformer A high voltage transformer is small-sized, lightweight and less costly to fabricate. The high voltage transformer is designed to maintain equal the potential difference between the components of two transforming component groups and also to keep the components of th... | 08/26/2008 |
| 7403081 | Broadband hybrid junction and associated methods The hybrid junction includes four electrically conductive planar windings, circular or rectangular, arranged so as to lie along an imaginary spherical or cylindrical surface. Each of the four electrically conductive windings is rotated from adjacent windings by abou... | 07/22/2008 |
| 7394340 | Electromagnetic device, high-voltage generating device, and method for making the electromagnetic device An electromagnetic device and a high-voltage generating device which are thin and improved in the characteristics are provided in which a magnetic core is made of a cylindrical form of a ferrite material having a higher intrinsic resistance. A winding is provided by... | 07/01/2008 |
| 7382221 | Coil The differences in characteristics among parts or the fluctuations of the inductance value of a coil due to temperature variation is lessened by reducing the stray capacitance components induced among the layers of wound conductor, and size reduction and cost reduct... | 06/03/2008 |
| 7345566 | Magnetic element A magnetic element capable of obtaining a desired characteristic and at the same time having high productivity that enables cost reduction is provided. The magnetic element includes a first coil (50) to which a signal is inputted, a second coil (60) to... | 03/18/2008 |
| 7321283 | Vertical winding structures for planar magnetic switched-mode power converters A vertical winding structure for planar integrated magnetics used in switched-mode power converters maintains close coupling between the different windings but reduces the eddy current losses, lowers the DC winding resistance and reduces the number of layers of the ... | 01/22/2008 |
| 7318270 | Method for producing a full wave bridge rectifier suitable for low-voltage, high-current operation A method for producing center-tapped and non-center-tapped full wave bridge rectifiers suitable for low-voltage high-current operation by simultaneously winding a plurality of identical secondary coil sections around a primary coil using on a prearranged secondary f... | 01/15/2008 |
| 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 |
| 7307361 | Medium voltage power converter formed using low voltage drives A medium voltage power converter is provided that has an input transformer adapted to connect to a multi-phase power source, multiple low voltage drives each coupled to a respective set of secondary windings of the input transformer and operatively configured to pro... | 12/11/2007 |
| 7304862 | Printed wiring board having edge plating interconnects The present invention provides a PWB for attaching electrical components thereto. The PWB includes a stack of insulating layers, conductive layers located between the insulating layers, wherein the conductive layers terminate at an edge of the PWB, and an edge plate... | 12/04/2007 |
| 7304867 | DC-DC converter of multi-output type A DC-DC converter of multi-output type is provided wherein a primary winding 5a is wound around core halves 5g, 5h of a transformer 5 between first and second secondary windings 5b, 5c of t... | 12/04/2007 |
| 7301428 | Printed circuit board transformer An object of the invention is to provide a PCB transformer having plural output channels, which can suppress a voltage fluctuation in each output channel to supply a stable output without the need for a larger body, even though an input load fluctuates. The PCB tran... | 11/27/2007 |
| 7277000 | Inductor and transformer In an inductor having a core and first and second coils wound upon the core, the wire of the first coil and the wire of the second coil lie are wound so as to lie parallel to each other and contact the core. The winding starting position of the first coil is made to... | 10/02/2007 |
| 7268657 | Coil component The coil component of the present invention is configured in that one secondary winding is coiled between central portion and end portion of outer magnetic leg, and the other secondary winding is coiled between central portion of outer magnetic leg and first gap por... | 09/11/2007 |
| 7268658 | Transformer having leakage inductance control structure A transformer having a leakage inductance control structure includes a primary coil, a secondary coil formed at a selected coil ratio relative to the primary coil to transform voltage and output electric power, and a leakage inductance control coil which is wound on... | 09/11/2007 |
| 7259639 | Inductor topologies and decoupling structures for filters used in broadband applications, and design methodology thereof Inductor topologies for filters used in broadband applications are described. In one implementation, an apparatus, such as an interface module includes a printed circuit board and a filter. The filter includes a generally circular high Quality factor (Q) value spira... | 08/21/2007 |
| 7256675 | Energy transfer apparatus for reducing conductivity electromagnetic interference and manufacturing method thereof An energy transfer apparatus is developed for reducing a conductivity electromagnetic interference and manufacturing method. The energy transfer apparatus comprises a core, an input winding, an output winding, a supply voltage and a supply winding. The supply windin... | 08/14/2007 |
| 7248138 | Multi-layer printed circuit board inductor winding with added metal foil layers The present invention provides an electromagnetic component formed from adjacent conducting layers of a multi-layer PCB and two additional conducting layers in contact with the PCB. The inventive component includes one or more winding turns formed by connecting the ... | 07/24/2007 |
| 7236077 | Transformer having adjustable leakage inductance A transformer having adjustable leakage inductance includes a primary winding coil, a secondary winding coil, a bobbin and a magnetic core assembly. The bobbin includes a winding section for winding the primary winding coil and the secondary winding coil thereon, wh... | 06/26/2007 |
| 7233223 | Transformer winding A Winding for high voltage transformer having a predetermined number of spaced winding groups joined to form a single winding transformer, each spaced winding group being solenoid wound from a predetermined number of turns. A method of forming the winding and a tran... | 06/19/2007 |
| 7199569 | Switching power supply unit A switching power supply unit is provided, in which core loss in a transformer or a level of heating due to AC resistance of the transformer can be reduced. A switching power supply unit has a transformer, an inverter circuit and a rectifier circuit. In a secondary ... | 04/03/2007 |
| 7170381 | Method and apparatus for transferring energy in a power converter circuit A reduced cost energy transfer element for power converter circuits. In one embodiment, an energy transfer element according to an embodiment of the present invention includes a magnetic element having an external surface with at least a first winding and a second w... | 01/30/2007 |
| 7167074 | Integrated planar flyback transformer Method and apparatus are provided for fabricating a planar transformer assembly for use in an implantable medical device. The planar transformer assembly includes a board, a first core, and a second core. The board has a first side, a second side, and an embedded wi... | 01/23/2007 |
| 7164331 | RF choke for cable system An RF choke for minimizing hum modulation in a coaxial cable system that carries broadband signals along with high amperage 60 Hz AC power signals. The choke contains two conductors wound about a rod core. The first conductor includes two groups of clockwise winding... | 01/16/2007 |
