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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...
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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...
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7330095 |
Cooled multiphase choke assembly
A cooled multiphase choke assembly comprising a first coil (L 1 , L 2 , L 3 ) for each phase (U, V, W) and a first cooling element ( 11 ), each first coil (L 1 , L 2 , L 3 ) comprising several...
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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...
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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...
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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...
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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...
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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...
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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...
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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....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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....
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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...
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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...
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6062821 |
Integral oil filter-pump system
An integral oil filter-pump system for an electric power device which involves a cabinet having an oil-filled compartment for containing the power device, as well as a circulation pump for...
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6052060 |
Temperature monitor for electrical switchgear
Insulating oil in electric power transmission switchgear such as a load tap changer for a transformer is filtered for removal of accumulated water and carbon particles. The filter and associated...
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5976226 |
Means to ensure a minimum of gas content in liquids used for heat exchange and insulating purposes with complementary means for liquid expansion into vessels with variable volumes
The invention, intended for large power transformers and industrial heat transfer installations, is systemic in nature and calls upon two components which complement each other, the first one...
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5744784 |
Low-loss induction coil for heating and/or melting metallic materials
Described is a low-loss induction coil for heating and/or melting metallic materials, the coil having windings formed by lengths of hollow tubing carrying a fluid coolant. In the central zone of...
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5736915 |
Hermetically sealed, non-venting electrical apparatus with dielectric fluid having defined chemical composition
An electrical apparatus, such as a transformer, includes an expandable internal chamber that is nonventing and completely and permanently sealed from the ambient environment. The chamber houses a...
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5684380 |
Oil cooled high power inductive coupler
An oil cooled inductive coupler for use with an inductive charging system that charges propulsion batteries of an electric vehicle. The coupler is connected to a power source by way of a coaxial...
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5508672 |
Stationary induction apparatus
A stationary reduction apparatus is arranged so that coil groups comprising plate type (or disc type) coils, which are stacked up in multiple layers with spacers inserted therebetween to traverse...
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5461215 |
Fluid cooled litz coil inductive heater and connector therefor
A fluid cooled RF transmission cable, transformer primary or secondary winding, and induction heating coil incorporating litz cable is disclosed. The heating coil comprises: a litz cable including...
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5336847 |
Stationary induction apparatus containing uninflammable insulating liquid
An nonflammable insulating liquid is obtained by adding an emulsifying agent having a volume ratio of 1 to 3% to an insulating liquid containing a fluorocarbon liquid of at least 25% in a volume...
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5283409 |
Coil body for the inductive heating of rollers
An inductive coil for heating a rotating roller is embedded in a plastic carrier. To cool the plastic carrier in the region of the coil, a cooling element in the form of a flat cooling chamber...
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4904972 |
Gas-insulated stationary induction electrical apparatus
A gas-insulated stationary induction electrical apparatus comprising a first closed vessel sealingly accommodating therein a main body having an iron core formed by laminating silicon steel sheets...
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4817706 |
Liquid cooling type uniform magnetic field coil
A coil designed for providing a highly uniform magnetic field suitable for use in nuclear magnetic resonance computer-aided tomography is provided with preheating apparatus which uses forced...
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4607245 |
Gas insulated electromagnetic induction appliance
A gas insulated electromagnetic induction appliance in which a non-condensing insulating gas and a condensing insulating coolant are confined, comprises (a) a pressure detector for detecting a...
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4581477 |
Gas-insulated electrical apparatus
The invention is relative with a gas-insulated electrical apparatus comprising a tank housing an electrical apparatus proper and in which a gas mixture consisting of a noncondensable insulating gas...
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4538131 |
Air-core choke coil
An axially symmetric air-core choke coil for high voltage applications. The coil includes a plurality of radially concentric, helically wound layers of windings. Non-insulated wire cable is used to...
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4512387 |
Power transformer waste heat recovery system
Large power transformers such as used at electrical generating plants utilize oil for cooling with the heat removed by air cooled radiators. Several air cooled radiators are removed from the...
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4485367 |
Cooling apparatus for a gas insulated transformer
A cooling apparatus for a gas insulated transformer has a tank which houses coils and an iron core and in which an electrically insulating gas is sealed. A reservoir housing the coils and having an...
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4484169 |
Transformer apparatus with -superimposed insulated switch and transformer units
This invention relates to improvements in a transformer apparatus in which a transformer unit insulated with insulating oil and a switch unit insulated with insulating gas are combined. The...
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4472700 |
Transformer with copper windings, liquid insulation material and supply depot containing solid copper deactivator to prevent dissolution of the copper
Transformer, including copper windings, electrical insulation for the windings, the electrical insulation being formed of sections of solid and liquid insulating material, the liquid insulating...
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4467305 |
Gas/vapor cooled electromagnetic induction machine
A gas/vapor electromagnetic induction machine comprises an annular coil container including two coaxial electrically insulating cylinders connected at lower ends to an annular bottom plate and...
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4461995 |
Cooling method and apparatus for eddy current flaw detection
An eddy current system and method is disclosed for detecting flaws in hot pipe product. The system includes a detector test head (22) having a heat shield (24) defining a generally cylindrical...
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4437082 |
Apparatus for continually upgrading transformer dielectric liquid
Electrical inductive apparatus having a tank, an insulating and cooling liquid in the tank and an electrical winding structure immersed in the liquid, the liquid having a low vapor pressure and...
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4424502 |
Transformer with a controlled flow of cooling liquid
A transformer with a controlled flow of cooling liquid has a pressure chamber (10) which, via a hydraulic connecting member (14), is connected to a circulating pump which is included in a cooling...
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4394635 |
Method for determining dissolved gas concentrations in dielectric coolants
The quantity of SF 6 gas dissolved in a halogenated dielectric coolant used in transformers can be determined by heating a sample quantity of the sample gas coolant to the point of cavitation and...
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4386651 |
Heat exchanger accessory for electronic circuit cabinets
Identical plates of essentially box-like form in which one sidewall of the box is notched out, and a transverse sidewall opposite the notch removed, the plates being stacked edgewise to form a duct...
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4321421 |
Vaporization cooled transformer having a high voltage
A vaporization cooled transformer utilizes the vaporized coolant at a constant predetermined pressure for upgrading the dielectric strength of the coolant. An auxiliary heater is employed for...
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4308512 |
Modular air core coil inductance assembly
The present invention preferably comprises a modular air core coil inductance assembly which is comprised of a plurality of spiral windings which are magnetically coupled to each other and disposed...
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