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7459863 Transformer and multi-lamp driving circuit using the same  
A transformer for driving multiple lamps includes a core, a primary winding set, a secondary winding set and a balancing winding set. The primary winding set winds around the core and includes a...
7447050 Multilevel converter and method of converting a supply voltage  
The present disclosure is concerned with a multilevel converter including a transformer arrangement comprising at least two transformer units, each with primary and secondary windings and a...
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...
7365501 Inverter transformer  
An inverter transformer includes a coil unit including a bobbin and a plurality of windings, and a transformer core unit. The bobbin is formed with a core-receiving compartment, and includes first,...
7362182 Power amplifier  
A radio frequency power amplifier including control electronics for providing control signals for timing of the power amplifier. A first group of the drivers are coupled to the control electronics...
7332992 Transformer  
Disclosed herein is a transformer including: an iron core; and a winding wound around the iron core; wherein the iron core includes a column-shaped output side iron core part, a plurality of...
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...
7301427 Transformer having auxiliary winding coil for sensing magnetic flux balance and driving circuit using the same  
A transformer having auxiliary winding coils for sensing magnetic flux balance is disclosed. The transformer comprises a first winding part having a first channel, a second winding part having a...
7274281 Discharge lamp lighting apparatus  
A discharge lamp lighting apparatus for supplying high frequency high voltage to an excimer discharge lamp comprises a boasting transformer having a core, a secondary side coil and a pair of...
7209024 Filter circuit and power supply unit  
The present invention provides a filter circuit realizing reduction in the number of magnetic cores on a circuit board and a space occupied by the magnetic cores, and a power supply unit using the...
7193496 Magnetic element and power supply  
A magnetic element and a power supply which can output a plurality of different output pulse signal voltages or different output AC voltages while preventing an increase in the number of parts or...
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...
7129813 Wound-rotor transformer and power source device using said wound-rotor transformer  
A small size wound rotor transformer having a simple structure, wherein the primary winding ( 32 ) is mounted on the central portion of a bobbin (insulator) ( 2 ), and the first and second...
7113065 Modular inductor for use in power electronic circuits  
A modular inductor arrangement is provided in which a footprint of an enclosure for single or multiple phase inductors provides enhanced thermal transfer. The inductor coil may be wound about an...
7019466 Circuit arrangement for driving a high-pressure discharge lamp  
A circuit arrangement has a first input terminal for a first voltage potential; a second input terminal for a second voltage potential; a third input terminal for feeding a starting voltage; a...
7015784 Wound-rotor transformer and power source device using said wound-rotor transformer  
An object of the present invention is to materialize a small size wound-rotor transformer in a simple structure, wherein the primary winding 32 is mounted on the central portion of the bobbin...
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...
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...
6844803 Thirty-degree length impedance transformer  
A transformer for substantially matching the impedance of a generator and a load, which is coupled to the generator via a transmission line. The transformer comprises an outer conductor having an...
6829817 Apparatus and method for the manufacture of large transformers having laminated cores, particularly cores of annealed amorphous metal alloys  
The invention provides an apparatus and manufacturing methods useful in the manufacture of large transformer cores, particularly, in the manufacture of large transformer cores made of a...
6822546 Transformer arrangement for combined pots and xDSL service  
The current technology involved with overlaying any type of digital subscriber loop (xDSL) service with plain old telephone service (POTS) makes use of two separate transformers, one for POTS and...
6794976 HF transformer assembly having a higher leakage inductance boost winding  
A high frequency transformer for a welding-type device is provided. The transformer includes a pair of ferrite cores and a bobbin configured to receive and support the pair of ferrite cores. A...
6791447 Configuration for producing electrical power from a magnetic field  
A configuration for producing electrical power from a magnetic field includes a three-dimensional winding configuration formed from a central core of a magnetic material on which at least three...
6617949 Choke coil  
A choke coil has small difference of wire wound resistances between coils to obtain sufficient unbalance attenuation amount, superior in workability in winding and reduced leakage inductance and...
6583703 Electrical apparatus having an electromagnetic device operable at multiple inductance values  
An electrical apparatus and method for matching the input power source and output impedance of the electrical apparatus utilizes electromagnetic devices having two or more inductive windings, which...
6542047 Ninety degree splitter with at least three windings on a single core  
A 90 degree splitter which covers a wide frequency range of 1500 to 2500 Mhz in a small footprint of only 0.2 inches by 0.2 inches. This device does not use any capacitors which greatly simplifies...
6518869 Power supply transformer for telephone  
A power supply transformer for telephone to be incorporated in an AC adapter as a power supply for a telephone. A bobbin used in a power supply transformer for a telephone is configured by taking...
6459350 Diode-split high-voltage transformer  
The invention specifies a diode-split high-voltage transformer having a core, a primary winding and a high-voltage winding, which is arranged in chambers of a coil former, in which the chambers...
6456182 Common mode choke coil  
In a common mode choke coil, a closed magnetic circuit core ( 2 ) is divided in parallel with its magnetic circuit, and formed by superimposing together for integration a first divided magnetic...
6445268 Instantaneous trip power transformer  
An instantaneous trip power transformer includes a high current main outer winding wound to have one or more turns, for providing the main breaker contact current path and for serving as the...
6414578 Method and apparatus for transmitting a signal through a power magnetic structure  
A method and apparatus for transmitting a signal through a power magnetic structure. A power magnetic core has one or more windings for transmitting power, and two windings for transmitting a...
6411528 Switching power circuit and insulating converter transformer  
The invention provides a switching power circuit and an insulating converter transformer. A tertiary winding to be formed on the secondary side of an insulating converter transformer is coiled in...
6323602 Combination equalizing transformer and ballast choke  
A ballast circuit includes an equalizer transformer for equalizing current between two or more lamps operated in parallel, combined on one core with a choke. In a 2-lamp embodiment, four windings...
6320490 Integrated planar transformer and inductor assembly  
An integrated transformer and inductor assembly for use in soft switching or resonant power converters, and the like. The assembly has a planar structure and includes a planar transformer and a...
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...
6118362 Integrated inductive assembly  
An integrated inductive assembly includes first and second inductive elements each comprising a winding wherein winding axes of the windings are perpendicular to one another. In addition, the first...
6064291 Converter transformer  
The present invention provides a small, light-weight converter transformer of high efficiency which has an excellent noise characteristic, a high coupling and good output voltage characteristic,...
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...
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...
5805042 Radio frequency low hum-modulation AC bypass coil  
A radio frequency choke for use in a cable television transmission and distribution circuit is disclosed. The radio frequency choke comprises a core of zinc-ferrite material as provided by...
5767754 Balanced to unbalanced transmission line impedance transformer exhibiting low insertion loss  
A balanced to unbalanced transmission line transformer is disclosed performing impedance transformation with improved frequency response across a wide operational bandwidth. The transmission line...
5764123 Transformer with reduced signal rise time  
A current transformer for monitoring a current in a conductor. The current transformer comprises a winding assembly that includes a resistive load. The transformer further comprises a compensation...
5579887 Coin detection apparatus  
A differential type sensing unit which includes a winding core having a winding shaft is described. In one embodiment, a post extends from the winding shaft and is located intermediate first and...
5545916 High Q integrated inductor  
An inductive structure for use in high frequency integrated circuits is provided. A conductive path forming the structure is arranged so extra conductive material is located at portions of the...
5455553 Distribution transformers  
A distribution transformer has a wound magnetic core (50) of overall circular shape and rectangular cross-section with between two and four overall rectangular shape electric coils (20,30)...
5448216 Flyback transformer  
A connecting member is fixedly mounted in a predetermined location so as to penetrate a closed space formed with a ferrite core, and an end of a first lead wire is inserted and connected with an...
5426409 Current controlled variable inductor  
A current controlled variable inductor comprises a magnetically saturable E" core having outer limbs each joined to a center limb by connecting limbs. A staggered series of flux bridges and air...
5371485 Two core phase angle regulating transformer  
An improved phase angle regulator with about 70% of the total impedance in the series unit and 30% in the excitor unit. In order to balance the physical size of both units, the excitor unit...
5369388 LTC compensating winding for parallel operation of transformers  
A winding configuration for a transformer equipped with a load tap changer which maintains an impedance balance when the transformer is connected in parallel with another transformer in the field....
5334957 RF high power, two and three way in phase combiner and method  
Two unequal impedance input port RF power combiner is used alone or as a component of a three equal input impedance input port RF power combiner with isolation between all ports. The combiner has a...
Matches 1 - 50 out of 170 1 2 3 4 >