Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7342757 | System and method for quench protection of a superconductor A system and method for protecting a superconductor from a quench condition. A quench protection system is provided to protect the superconductor from damage due to a quench condition. The quench protection system comprises a voltage detector operable to detect volt... | 03/11/2008 |
| 7327542 | Current limiter for limiting current in case of a fault In a current limiter for limiting currents in case of a fault including an additional device comprising an additional electric valve connected in series and being conductive in the same direction as the associated main valve, two series-connected valve branches arra... | 02/05/2008 |
| 7265521 | Reactive power compensation to minimize step voltage changes and transients The invention features a system and approach for minimizing the step voltage change as seen by the utility customer as well minimizing transients imposed on the fundamental waveform of a normal voltage carried on a utility power network when a reactive power source ... | 09/04/2007 |
| 7200015 | Automatic capacitor discharge for power supplies In a DC power supply or a battery charger, plural output filter capacitors remain highly charged after the load is removed and the converter is turned off. A transistor connected across the capacitors is non-conductive during normal power supply operation and a blee... | 04/03/2007 |
| 7193825 | Superconducting fault current limiter A superconducting current limiting device (30) comprising: an interconnected high magnetic permeability structure including a central core (50) interconnected to at least a first and second arm (31, 32) branching off therefrom; a superconductive... | 03/20/2007 |
| 7154239 | Controller for a brushless direct current motor A controller includes a power source unit, a drive circuit, and a state control circuit. The drive circuit is coupled to the power source unit, and includes a drive coil and a switching transistor unit. The switching transistor unit is operable in one of a circuit-m... | 12/26/2006 |
| 7091703 | Dynamic reactive compensation system and method The invention features a system for connection to a utility power network. The system includes a reactive power compensation device coupled to the network and configured to transfer reactive power between the utility power network and the reactive power compensation... | 08/15/2006 |
| 7014928 | Direct current/direct current converter for a fuel cell system Fuel cell systems and control methods including a fuel cell and a second energy source, such as a battery that is adapted to supplement the fuel cell. In addition, the fuel cell system utilizes a single bipolar switching module, such as an IGBT six pack module that ... | 03/21/2006 |
| 7011902 | Black start method and apparatus for a fuel cell power plant, and fuel cell power plant with black start capability A black start operation employs the accumulation of power resulting from a reaction of fuel and ambient oxidant passively seeped or diffused into a fuel cell stack to bootstrap the fuel cell system operation. ... | 03/14/2006 |
| 6931333 | Electrical power sensing The RF power passing through a given position in a monolithic microwave integrated circuit (MMIC) is determined using the Seebeck effect. The MMIC includes at least certain components of a voltage creating circuit, including a first Seebeck junction on the MMIC at a... | 08/16/2005 |
| 6930897 | Fuel cell inverter The invention is directed to a method, system and device for converting direct current (DC) electrical voltage from a fuel cell to an alternating current (AC) voltage. The inventive method regulates power drawn from the fuel cell and from a battery to maintain a sub... | 08/16/2005 |
| 6424135 | High power drive from AC and DC sources using cryoelectronics A method and apparatus for powering a high power load (on the order of 50,000 watts or more) can have an input from any of a plurality of different voltage sources, AC or DC. In one embodiment, the AC sources can have a frequency in the range of 162/3-60 ... | 07/23/2002 |
| 6097181 | High power drive from AC and DC sources using cryoelectronics A method and apparatus for powering a high power load (on the order of 50,000 watts or more) can have an input from any of a plurality of different voltage sources, AC or DC. In one embodiment, the AC sources can have a frequency in the range of 162/3-60 ... | 08/01/2000 |
| 6072307 | Method and a converter topology for ensuring charge and discharge through a coil so as to allow simultaneous and independent charge and discharge thereof A method and converter topology for ensuring charge and discharge of electric current to a coil so as to allow simultaneous and independent charge and discharge thereof, particularly suitable for a superconducting coil and showing an increase in power tra... | 06/06/2000 |
| 5656870 | Current control for superconducting magnetic energy storage system A superconducting magnetic energy storage system for applying power to a load includes a superconducting magnet, the inductor of which is supplied with current via a source which may be preset to a desired value of current, and wherein a feedback loop res... | 08/12/1997 |
| 5644218 | Protection device for a superconducting coil of a superconducting voltage stabilizer A superconducting voltage stabilizer is set forth which utilizes a superconducting coil for storing and releasing electrical energy. A first semiconductor switch is disposed to conduct current from the superconducting coil therethrough when the supercondu... | 07/01/1997 |
| 5612615 | Cryogenic electronics power supply A cryogenically cooled circuit, operating at temperatures at which inductors windings of the circuit exhibit superconducting characteristics, provides unique advantages in high performance, preferably high power circuits. Portions of the circuit (or the e... | 03/18/1997 |
| 5606300 | Superconducting magnet superconducting magnet coil, and manufacturing method thereof A superconducting magnet coil, an insulating layer, and a superconducting magnet which do not generate quenching under cooled and operational conditions are provided by using a fixing resin capable of suppressing microcrack generation in a resin layer whi... | 02/25/1997 |
| 5565763 | Thermoelectric method and apparatus for charging superconducting magnets A method and apparatus for charging superconducting magnet coils using the Seebeck effect of thermoelectric materials. Superconducting magnet coils are wound from a superconducting material, such as niobium-titanium, and placed in a cryogenic dewar to coo... | 10/15/1996 |
| 5525949 | Energy storage device An energy storage device comprising an array of electrical coils formed from relatively high temperature superconducting material, the coils being arranged around a common axis and carrying working currents in the same sense.... | 06/11/1996 |
| 5523914 | Inductive superconducting current storage An inductive superconducting current storage (2), characterized in that it comprises an inner coil (4) wound from superconducting material and an outer coil (6) wound from superconducting material and disposed around the inner coil (4) in spaced manner th... | 06/04/1996 |
| 5519312 | Hybrid system of fuel cell and superconducting magnetic energy storage device An apparatus for producing, storing, and delivering direct current electrical energy to a load which contains a fuel cell, a superconducting magnetic energy storage device, a switch electrically connected between the fuel cell and the superconducting magn... | 05/21/1996 |
| 5390064 | Current limiters in power utility applications A current limiting method and apparatus for preventing fault overload in a utility power transmission system employs a high power, superconducting coil based pulse transformer for saturating the core of the utility power transformer thereby limiting its c... | 02/14/1995 |
| 5387890 | Superconductive coil assembly particularly for a current limiter, and a current limiter including such a coil assembly The present invention relates to a superconductive coil assembly which may be used particularly for a current limiter, the coil assembly comprising a plurality of coaxial cylindrical coils electrically connected in series, each coil comprising two winding... | 02/07/1995 |
| 5355275 | Current limiting device for electromagnetic coil employing gap containing superconductive shield A variable impedance device comprises a coil (10) and an associated magnetic circuit (16) having a gap receiving a plate (20) of superconducting material which acts as a shield or barrier so that, while the plate (20) is in its superconducting state, magn... | 10/11/1994 |
| 5339062 | High power energy transfer system utilizing high temperature superconductors Electrical energy is transferred or switched by selectively holding off the coupling of a magnetic field to a secondary inductive element (a coil) through a path which contains a high temperature superconductive element (HTS) which is capable of holding o... | 08/16/1994 |
| 5329225 | Thin film superconductor inductor with shield for high frequency resonant circuit An inductor uses high temperature superconductors in order to obtain high Q for high frequency operation. The superconductors are applied as thin films to substrates. In some embodiments, superconductor thin films are applied to opposite sides of the same... | 07/12/1994 |
| 5250508 | Superconductor current-limiting apparatus The invention relates to superconductor current-limiting apparatus of the type having a magnetic core around which firstly a superconductor component is disposed, followed by an electric coil made of non-superconducting material, the apparatus being desig... | 10/05/1993 |
| 5241447 | Magnetic switch structure and method employing superconductive material An electrical switch structure which employs superconductive material. A magnetizable core is encompassed by a body of superconductive material. The body of superconductive material has a superconductive state and a normal resistive state and can be place... | 08/31/1993 |
| 5194803 | Superconductive voltage stabilizer having improved current switch A superconductive voltage stabilizer employs an improved current switch. The improved current switch controls the release of current stored in an energy storage device or superconducting inductive energy storage coil for selective delivery of the current ... | 03/16/1993 |
| 5168259 | Superconducting coil A superconducting coil is disclosed. A plurality of coils made of oxide superconducting materials are formed on the respective surfaces of substrates, and the adjacent coils mounted on the substrates are connected by conductors to form one coil. Since the... | 12/01/1992 |
| 5159261 | Superconducting energy stabilizer with charging and discharging DC-DC converters A superconducting energy stabilizer having multiple load connections employs DC-DC conversion. A discharging DC-DC converter removes stored energy from a superconducting inductive energy storage device or superconducting magnet and delivers the energy to ... | 10/27/1992 |
| 5140290 | Device for inductive current limiting of an alternating current employing the superconductivity of a ceramic high-temperature superconductor A device for inductive current limiting of an alternating current consisting of an induction coil (2), which includes at least one winding and through which current flows, a body (3) made of a ceramic high-temperature superconductor arranged concentricall... | 08/18/1992 |
| 5097243 | Thin-film transformer utilizing superconductive components Thin-film transformer, for example suitable for use in a thin-film magnetic head, comprising a magnetic yoke composed of two magnetically permeable thin layers 3 and 5 and a primary turn constituted by an electrically conducting thin layer 13 and a second... | 03/17/1992 |
| 5016600 | Methods of generating and controlling a magnetic field without using an external power supply specification A system, based on superconducting wires and elements, is used to rapidly generate magnetic field intensities at designated points. The apparatus consists of primary and secondary magnet windings, especially arranged so as to produce rapidly increasing ma... | 05/21/1991 |
| 5011820 | Superconducting current accumulator with pulsed output A process for supplying a current consumer with current from an accumulator for electrical energy, in which electrical energy pulses of very short duration each are supplied to the current consumer from a superconducting accumulator (2) made with supercon... | 04/30/1991 |
| 5010255 | High current magnetohydrodynamic gigawatt pulse generator A disk type magnetohydrodynamic (MHD) generator/channel and a hybrid pulse power transformer (HPPT) with a superconductive primary and a normal secondary for producing high power and high current pulses is disclosed. The HPPT surrounds the MHD channel thr... | 04/23/1991 |
| 5006672 | Apparatus for storing high magnetic fields having reduced mechanical forces and reduced magnetic pollution The present invention identifies several configurations of conducting elements capable of storing extremely high magnetic fields for the purpose of energy storage or for other uses, wherein forces experienced by the conducting elements and the magnetic fi... | 04/09/1991 |
| 4994932 | Superconducting current limiting apparatus A superconducting current limiting apparatus includes a first container, a superconducting current limiting element accommodated in the first container, a refrigerant filling the first container for cooling the superconducting current limiting element acc... | 02/19/1991 |
| 4967141 | Method of taking out and storing energy in a superconductive ring or coil A superconductive ring or coil is irradiated with a light ray so that its superconducting state is destroyed for a short period of time. Under the destruction of the superconducting state, removal of energy from the superconductive ring or coil or storage... | 10/30/1990 |
