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| Number | Title | Issue Date |
| 8120455 | Transformer structure A transformer includes a case, a magnetic device and a thermally conductive layer. The case has a receptacle. The magnetic device is disposed within the receptacle, and includes a winding member and a magnetic core assembly. The thermally conductive layer is arrange... | 02/21/2012 |
| 8111123 | Disc wound transformer with improved cooling A method of manufacturing a transformer that includes forming a disc-wound coil using a plurality of pre-formed cooling ducts. Each cooling duct may be supported by a support pipe secured between walls of the cooling duct, or by a removable insert. First and second ... | 02/07/2012 |
| 8089330 | Saturated reactor of direct current thyristor valve The present invention provides a novel direct current thyristor valve saturated reactor includes: case, winding in the case, iron cores, cooling fins, pipes and press fit mechanism. The iron cores are coupled with winding. The invention having the following advantag... | 01/03/2012 |
| 8085120 | Solid insulation for fluid-filled transformer and method of fabrication thereof An insulation system for a fluid-filled power transformer that allows for operation of the transformer at higher temperatures and with lowered susceptibility to aging. The insulation system includes a plurality of fibers that are bound together by a solid binding ag... | 12/27/2011 |
| 7973628 | Methods and apparatus for electrical components Methods and apparatus according to various aspects of the present invention may operate in conjunction with an inductor. For example, n inverter/converter system according to various aspects of the present invention may include an inductor comprising a substantially... | 07/05/2011 |
| 7902950 | System for preventing rupture of transformer tank Disclosed herein is a rupture prevention system, which increases a limit of the deformation of a transformer tank, thus primarily preventing a sudden rise in pressure, and which increases the number of rupture disc per unit area, thus preventing the rupture of the t... | 03/08/2011 |
| 7812699 | Oil cooling system, particularly for transformers feeding traction electric motors, transformer with said system and method for determining the cooling fluid flow in a cooling system An oil cooling system, which may be employed for transformers feeding traction electric motors and for oil in a high viscosity condition, includes a first heat exchanger between a heat generating source to cooling oil that is connected by delivery and return ducts t... | 10/12/2010 |
| 7719397 | Disc wound transformer with improved cooling and impulse voltage distribution The invention is directed to a transformer and a method of manufacturing the same, wherein the transformer has a cylindrical disc-wound coil that includes a layer of cooling ducts disposed between first and second conductor layers. The first and second conductor lay... | 05/18/2010 |
| 7567160 | Supplementary transformer cooling in a reactive power compensation system A reactive power compensation system includes a reactive power compensation device and a transformer electrically connected to the reactive power compensation device and having a cooling unit. The reactive power compensation device has an enclosure housing power ele... | 07/28/2009 |
| 7508289 | Cooled high power vehicle inductor and method A cooled high-power vehicle inductor includes an inductor core including a central axis; a first series of inductor windings around the central axis of the cooled high-power vehicle inductor, the first series of inductor windings having an outer perimeter; a second ... | 03/24/2009 |
| 7474185 | Packaging techniques for a high-density power converter A high-density power converter that benefits from improved packaging techniques and thermal handling capability is provided. The power converter includes a magnetic core. The converter further includes a printed circuit board providing at least one cutout for receiv... | 01/06/2009 |
| 7474186 | Quantitative measurement of production and consumption of gases in power transformers A method and apparatus for quantitative DGA (Diluted Gas Analysis), providing quantitative on-line readings of gas production/consumption that directly corresponds to the extent of faults in a power transformer. This quantitative DGA method uses the oil filling of t... | 01/06/2009 |
| 7429907 | Power inductor with heat dissipating structure The present invention relates to a power inductor having a heat dissipating structure formed on the surface thereof, which comprises: at least a conducting wire; and a cladding, made of a magnetic material for wrapping the conductive wire, having the heat dissipatin... | 09/30/2008 |
| 7423507 | Inductance assembly for an electric machine The present invention is generally concerned with an inductance assembly that is so configured and sized as to be inserted inside the cooling assembly of an electric machine to thereby decrease the overall volume of the machine. ... | 09/09/2008 |
| 7369024 | Compact dry transformer Compact dry transformer (1A) consisting of a magnetic material core (2) provided with a first heat sink consisting of covers (10) having cooling fins (11) on the outer surface thereof. The transformer also consists of a coil assembly (... | 05/06/2008 |
| 7330096 | Fault current limiter A fault current limiter (FCL) comprises: an air core flat clock spiral inductor comprising wound electrically conductive material and insulated turns; and two terminations configured for attaching the spiral inductor in series with a power carrying conductor. ... | 02/12/2008 |
| 7330095 | Cooled multiphase choke assembly A cooled multiphase choke assembly comprising a first coil (L1, L2, L3) for each phase (U, V, W) and a first cooling element (11), each first coil (L1, L2, L3) comprising several turns of winding, which define a subst... | 02/12/2008 |
| 7319375 | Universal bench magnet An improve material holding device using magnetic force of variable strength comprising: an electromagnet mounted to a universal bracket adapted to mount to a vertical or horizontal surface, or a vise using the vise bar integrally attached to the underside of the ma... | 01/15/2008 |
| 7254029 | Printed circuit board with a heat dissipation device An electronic assembly includes a printed circuit aboard, a CPU, an electronic component and a thermal pad attached to the printed circuit board. The CPU and the electronic component are located on a first face of the printed circuit board. The electronic component ... | 08/07/2007 |
| 7245197 | Liquid-cooled choke The invention relates to a liquid-cooled choke comprising a choke core (1), a choke coil (2) and a path (3) for a cooling liquid to cool the choke. The choke core (1) is divided into at least two parts (1a, 1b)... | 07/17/2007 |
| 7227754 | Fluid cooling for iron core and winding packs A power choke or transformer has an iron core, windings, and a cooling apparatus having a heat exchanger with a heat absorber and a cooling fluid duct operationally connected to the heat absorber, wherein the iron core is operationally connected to the heat absorber... | 06/05/2007 |
| 7205874 | Method and apparatus for decreasing gassing and decay of insulating oil in transformers The invention deals with increasing the quality of insulating mineral oil in transformers, by providing an isolating layer of flowing nitrogen over the oil's surface to keep ambient air from combining or absorbing with or in the oil, also providing a kidney or filte... | 04/17/2007 |
| 7164584 | Modular heatsink, electromagnetic device incorporating a modular heatsink and method of cooling an electromagnetic device using a modular heatsink An electromagnetic device (10) includes a core (12) having first and second arms (16, 18) connected by at least one body (14), a first winding (40) having multiple turns (41a, 41b) on the first arm (1... | 01/16/2007 |
| 7161454 | Apparatus and method for cooling electrical transformers A transformer assembly includes a transformer having a winding, a thermal sensor in thermal communication with the transformer winding, and an airflow generator in signal communication with the thermal sensor and arranged for fluid communication with the transformer... | 01/09/2007 |
| 7158001 | Choke coil and electronic device using the same A choke coil according to the invention is configured to include: a coil incorporated with terminals and/or intermediate tap, the coil configured of a metal plate being punched and folded; a magnetic material buried with the coil therein; and a radiator of a materia... | 01/02/2007 |
| 7132915 | Ferrite assembly A ferrite assembly has a first conductor and a number of ferrite members. Each of the number of ferrite members has a core. The ferrite members are in electrical communication with the first conductor. The ferrite assembly has a number of current dividing members in... | 11/07/2006 |
| 7130197 | Heat spreader A heat spreader is disclosed. The heat spreader includes a body member, a first fin connected to the body member, a second fin connected to the body member, a third fin connected to the body member, and a fourth fin connected to the body member. The first and second... | 10/31/2006 |
| 7129808 | Core cooling for electrical components A cooling system is provided for electrical components in which cooling assemblies (11, 45) are inserted in non-magnetic cores of the electrical components, and in which tubes provide both inflow and outflow of a cooling medium. The non-magnetic cores may be ... | 10/31/2006 |
| 7081802 | System for cooling a power transformer A system for cooling a power transformer wherein cryogen in liquid or solid form is sprayed into a vaporizer or directly onto a power transformer radiator and the vaporizing and/or sublimating cryogen cools a cooling fluid within the vaporizer or cools the radiator ... | 07/25/2006 |
| 7061361 | Circuit board assembly and flat coil A circuit board assembly has a flat coil element mounted on a circuit board so that an electric power loss is not generated even when the flat coil element is mounted to the circuit board together with a circuit part having a large heat sink. A module mounted on the... | 06/13/2006 |
| 7048875 | High oleic acid oil compositions and methods of making and electrical insulation fluids and devices comprising the same High oleic acid triglyceride compositions that comprise fatty acid components of at least 75% oleic acid, less than 10% diunsaturated fatty acid component; less than 3% triunsaturated fatty acid component; and less than 8% saturated fatty acid component; and having ... | 05/23/2006 |
| 7049922 | Method and apparatus for decreasing gassing and decay of insulating oil in transformers The invention deals with increasing the quality of insulating mineral oil in transformers, by providing an isolating layer of flowing nitrogen over the oil's surface to keep ambient air from combining or absorbing with or in the oil, also providing a kidney or filte... | 05/23/2006 |
| 7029519 | System and method for gas recycling incorporating gas-insulated electric device A gas recycling system which has a carbon dioxide collecting device for collecting gas containing carbon dioxide from a carbon dioxide source. In the system, at least part of the gas containing sulfur hexafluoride used as an electric insulation medium in a gas-insul... | 04/18/2006 |
| 7002443 | Method and apparatus for cooling magnetic circuit elements An apparatus and method for providing cooling to a magnetic circuit element having a magnetic core disposed around a centrally located core support member having at least one core support member wall is disclosed which may comprise a core support coolant inlet; a co... | 02/21/2006 |
| 6998950 | Method of making an electric inductor and inductor made by same An inductor design is disclosed which balances thermal requirements with magnetic and other requirements. The package is designed based upon the desired magnetic volume and the dimensions of a primary heat dissipation surface, which is preferably designed for conduc... | 02/14/2006 |
| 6972655 | Construction for cooled solenoid An electromagnetic, liquid or gas cooled solenoid coil is constructed of an inner core formed by a simulated pole piece. The inner core has coolant feed ports that communicate with a surrounding perforated bobbin. A pair of ordinary electromagnetic wires is twisted ... | 12/06/2005 |
| 6914195 | Distribution transformer An oil-filled pole-mounted distribution transformer comprises a tank housing a transformer core-coil assembly immersed in cooling oil. The tank is made of a corrosion-proof composite material and a radiator is provided for cooling the oil. The radiator is external t... | 07/05/2005 |
| 6912043 | Removable reticle window and support frame using magnetic force An apparatus for maintaining an optical gap between a pellicle and a reticle in a photolithography system includes a frame defining first and second opposing surfaces, a reticle mated to the first opposing surface using magnetic coupling; and a pellicle mated to the... | 06/28/2005 |
| 6909349 | Apparatus and method for cooling power transformers A system (27) for reducing the temperature of cooling oil for a power transformer (12) includes a heat exchanger (44) interposed in the cooling oil system. The heat exchanger (44) relies upon a liquid-to-liquid exchange of heat from the h... | 06/21/2005 |
| 6905638 | Vegetable oil based dielectric fluid and methods of using same In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a ... | 06/14/2005 |
