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| Number | Title | Issue Date |
| 8188822 | Cooling system for large power transformers A cooling system includes a housing having a compartment and an oil inlet. A transformer unit is disposed in the compartment and includes a plurality of large power transformers. A heat-dissipating unit is disposed in the compartment and includes a fluid inlet port ... | 05/29/2012 |
| 7884691 | Electrical component with a cooling circuit for underwater operation An electrical component with winding conductors, particularly a transformer, includes a cooling circuit with a heat exchanging unit. Cooling elements of the heat exchanging unit can be flowed around by a first liquid, particularly seawater, thus enabling an effectiv... | 02/08/2011 |
| 7443273 | Arrangement for cooling of components of wind energy installations The system utilizes the flow of a medium for cooling an installation, especially a transformer. The fact is utilized that the flow of the medium, e.g. wind, automatically increases with increasing load of the transformer. The novel transformer is formed so that its ... | 10/28/2008 |
| 7409849 | Oil filtration system for plural phase power equipment tanks Insulating oil in electric power generation, transmission and distribution equipment such as circuit breakers, regulators, phase shifters, tank diverter switches and capacitor banks for respectively separated phases of a plural phase transmission or distribution lin... | 08/12/2008 |
| 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 |
| 7365625 | Tank for electrical apparatus immersed in fluid A tank for an electrical apparatus immersed in fluid is formed by a couple of long opposite of opposing walls where any of them have one or more supporting folds; and a couple of short opposite or alternate opposing walls joined to the long walls on their lateral en... | 04/29/2008 |
| 7361918 | High repetition rate laser produced plasma EUV light source An EUV light source apparatus and method are disclosed, which may comprise a pulsed laser providing laser pulses at a selected pulse repetition rate focused at a desired target ignition site; a target formation system providing discrete targets at a selected interva... | 04/22/2008 |
| 7339447 | High-voltage transformer coil with acoustic wave guiding function The present invention relates to a high-voltage transformer coil with acoustic wave guiding function, which comprises a plurality of wound wires, an insulated material for packaging said wound wires to form a coil, a high-voltage connector formed on a side of said c... | 03/04/2008 |
| 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 |
| 7317179 | Systems and methods to shape laser light as a homogeneous line beam for interaction with a film deposited on a substrate Systems and methods are disclosed for shaping and homogenizing a laser beam for interaction with a film. The shaping and homogenizing system may include a lens array and a lens that is positioned to receive laser light from the lens array and produce a respective el... | 01/08/2008 |
| 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 |
| 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 |
| 7171814 | Method and apparatus for carbon dioxide accelerated unit cooldown A system and a method of its use for the accelerated cooldown of at least one unit by injecting liquid carbon dioxide via a sparger into a pipeline connected to the unit via an access valve upstream of the unit being cooled. By providing an evenly distributed flow i... | 02/06/2007 |
| 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 |
| 7148776 | Electromagnetic clamp and method for clamping a structure The electromagnetic clamp and method includes an electromagnet and a clamping piece located on opposite sides of a structure to clamp the structure. The electromagnet attracts the clamping piece through the structure when the electromagnet is energized, such that th... | 12/12/2006 |
| 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 |
| 7088210 | Electromagnet having spacer for facilitating cooling and associated cooling method An electromagnet and associated apparatus and method are provided. The electromagnet includes a core and at least one winding disposed circumferentially about the core such that the winding extends at least one revolution around the core. The electromagnet further i... | 08/08/2006 |
| 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 |
| 7078994 | Constant power and temperature coil A coil apparatus is described that incorporates two or more conductors, wound in parallel, following the same path, in intimate physical contact throughout the path but electrically isolated. The current applied to each of the coils can be selected independently. Th... | 07/18/2006 |
| 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 |
| 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 |
| 6985061 | Arrangement and method for installing a subsea transformer An arrangement and a method for use in installation procedures for subsea transformers. A central, hole or tube is included in an encapsulation enclosing a transformer that is to be installed. Three core elements of the transformer are arranged symmetrically around ... | 01/10/2006 |
| 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 |
| 6968728 | Test tap adapter for extracting dissolved gases from insulating oil and measuring electrical parameters of a transformer bushing The present invention relates to an apparatus for measuring the capacitance and the dissipation factor in a transformer bushing and extracting gas dissolved in the insulating fluid of said bushing. The apparatus comprises a porous cylindrical member associated with ... | 11/29/2005 |
| 6957550 | Method and apparatus for extracting non-condensable gases in a cooling system A cooling technique involves: reducing a pressure of a cooling fluid to a subambient pressure at which the cooling fluid has a boiling temperature less than a temperature of a heat-generating structure; bringing the cooling fluid at the subambient pressure into ther... | 10/25/2005 |
| 6956189 | Alarm and indication system for an on-site induction heating system An induction heating system having a fluid cooling unit, a power source, an induction heating device, a controller, and an alarm system to place the system in a safe condition when an improper operating condition is detected. The induction heating system may have a ... | 10/18/2005 |
| 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 |
| 6900420 | Cooled induction heating coil The present invention relates to an induction heating coil comprising a litz cable which is wound into a spiral to form a bobbin, and means for cooling said cable indirectly. The litz cable is arranged to be cooled by means of an indirect cooling system that compris... | 05/31/2005 |
| 6885268 | Method and device for cooling high voltage transformer for microwave oven Disclosed are a method and a device for cooling a high voltage transformer for a microwave oven, in which the high voltage transformer is sealed so as to separate a coil and a core from the outside and to improve a cooling effect, and in which electric connection li... | 04/26/2005 |
| 6873236 | 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. ... | 03/29/2005 |
| 6838968 | Transformer with forced liquid coolant In order to cool the windings, core and optionally the wall of the element (1) receiving the windings (3,4) and the core (2) as effectively as possible, conducting surfaces (5, 6, 8,15) are disposed inside said element in such a way that ... | 01/04/2005 |
| 6661322 | Sound-insulating device for an induction machine A sound-insulating device for a stationary induction machine with an active part, an insulating fluid surrounding the active part, and a tank enclosing the insulating fluid. The sound-absorbing device includes a gas-filled cavity and a resilient member su... | 12/09/2003 |
| 6563410 | Small footprint power transformer incorporating improved heat dissipation means A small footprint power transformer constructed so as to exhibit improved heat dissipation characteristics and an enhanced flow of a cooling medium. The transformer construction achieves small footprint by superimposing the core legs with the windings in ... | 05/13/2003 |
| 6531942 | Method of cooling an induction coil This invention relates to a method of cooling an immersed induction coil, such as an ionizing coil used in a vacuum processing chamber. The coil 10 may comprise a coiled hollow tube 11 through which coolant can flow when pumped by a pump 13. A valve 16 is... | 03/11/2003 |
| 6529108 | Electric appliance In an electric apparatus, insulating cylinders having different diameters are arranged in a shape of multiple cylinders between the iron core and the low voltage winding, between the low voltage winding and the high voltage winding and on the periphery of... | 03/04/2003 |
| 6522229 | Transformer The invention relates to a transformer tank generally shaped like a rectangular prism and filled with insulating liquid and assembled mainly by welding. The tank comprises a detachably fastened transformer cover plate and a transformer core placed in the ... | 02/18/2003 |
| 6494617 | Status detection apparatus and method for fluid-filled electrical equipment A status detection apparatus for electrical equipment includes a plurality of distributed multiparameter sensors in a containment vessel or other fluid filled region of the electrical equipment. The sensors are capable of providing data relating to plural... | 12/17/2002 |
| 6456179 | Transformer A container (2) with an oil immersed core (1) and windings has corrugated walls. Bushing insulators (9,10) have pressure-resistant and water-resistant cable shoes (11). A tank encompasses another container (4) filled with insulating oil (3) and has pressu... | 09/24/2002 |
| 6157282 | Transformer cooling method and apparatus therefor This invention relates to a cooling system for a transformer. A winding defining a coil, including a duct having an open top and bottom, is sealed to a sleeve, thus forming a closed circulatory path. A fluid is retained and circulated within the circulato... | 12/05/2000 |
