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| Number | Title | Issue Date |
| 7321834 | Method for calculating power flow solution of a power transmission network that includes interline power flow controller (IPFC) Power flow models of Interline Power Flow Controllers (IPFC) for large-scale power systems are studied, in details. Mathematical models of the IPFC, using the d-q axis decompositions of control parameters are derived. In this framework, for each IPFC, only two contr... | 01/22/2008 |
| 7175717 | Method for making nano-scale grain metal powders having excellent high-frequency characteristic and method for making high-frequency soft magnetic core using the same A method for making a nano-scale amorphous soft magnetic powders obtained by thermally processing and crystallizing amorphous ribbons produced using a rapid solidification process (RSP) and crushing the same. The amorphous soft magnetic core having an excellent high... | 02/13/2007 |
| 7172660 | Method for making Fe-based amorphous metal powders and method for making soft magnetic core using the same A method for making an amorphous soft magnetic core using Fe-based amorphous metal powders is provided. The amorphous soft magnetic powders are obtained by crushing amorphous ribbons produced using a rapid solidification process (RSP). The magnetic core is obtained ... | 02/06/2007 |
| 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 |
| 7091799 | Hybrid bypass networks for low-loss cables and ripple filter chokes Losses are reduced in electrical conductors and filters, especially those made with superconducting cables or inductors, which carry currents having both direct current (DC) and alternating current (AC) portions as in rectifier busses and power distribution systems.... | 08/15/2006 |
| 6958898 | Flux pump with a superconductor and superconducting electromagnet to be operated therewith A device includes a flux pump and an electromagnet to be fed thereby for the production of highly constant magnetic fields of high field strength. In a flux pump of the rectifier type, switches used are MOSFETs. These MOSFETs include HTc superconductor ma... | 10/25/2005 |
| 6940715 | Modular power converter having fluid cooled support A support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. The support, in conjunction with other packaging features may form a shield from both external EMI/RFI ... | 09/06/2005 |
| 6903911 | Protective circuit for a network-controlled thyristor bridge A protective circuit (SCH) for a line-commutated thyristor bridge (B, B′), which is designed for feeding energy of a power circuit connected to the bridge and also for feedback from this circuit, and which is connected between the thyristor bridge and the power ci... | 06/07/2005 |
| 6594157 | Low-loss magnetic powder core, and switching power supply, active filter, filter, and amplifying device using the same A magnetic powder core comprises a molded article of a mixture of a glassy alloy powder and an insulating material. The glassy alloy comprises Fe and at least one element selected from Al, P, C, Si, and B, and has a texture primarily composed of an amorph... | 07/15/2003 |
| 6545880 | Cryogenic power distribution system for large structure Energy distribution and conversion system suitable for high-rise structures, large building complexes, factories, ships, airplanes, city blocks, etc., based on: High-Temperature Superconductors (HTS) and Cryogenic Power and Energy Conversion (CPEC) using ... | 04/08/2003 |
| 6414853 | Method and apparatus for controlling a phase angle of AC power to keep DC voltage from an energy source constant A transfer of power between an energy storage device and a load is controlled by obtaining a DC voltage from the energy storage device, and controlling a phase angle of AC power delivered to the load to keep the DC voltage substantially constant. The phas... | 07/02/2002 |
| 6403148 | Magnetooptical recording medium on which high-density information can be recorded and method of reproducing the recorded information A magnetooptical recording medium includes a first magnetic layer, a second magnetic layer whose Curie temperature is lower than that of the first magnetic laye, and a third magnetic layer, comprising a vertically-magnetizing film, whose Curie temperature... | 06/11/2002 |
| 6163064 | Apparatus for improved operation of MOSFET devices in cryogenic environments An electronic circuit that comprises a MOSFET device includes source, drain and gate terminals and operates at cryogenic temperatures. The circuit includes a snubber that is connected between the source and drain terminals of the MOSFET and that has capac... | 12/19/2000 |
| 5953224 | Control circuit for cryogenically-cooled power electronics employed in power conversion systems A control circuit generates signals for controlling the sequence in which selected input signals are carried across the terminals of a polyphase switching conversion circuit. The control circuit includes switching elements galvanically isolated from the s... | 09/14/1999 |
| 5682304 | Superconductive electromagnetic energy storage apparatus and a method for storing electromagnetic energy A superconductive system for receiving electromagnetic energy from an outside source, storing electromagnetic energy in two interacting forms of DC and AC electric current, and delivering electromagnetic energy to an outside load wherein the electromagnet... | 10/28/1997 |
| 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 |
| 5359308 | Vehicle energy management system using superconducting magnetic energy storage An energy management system for a hybrid internal combustion and electric vehicle provides a highly energy-efficient and yet highly agile hybrid vehicle. The vehicle includes an internal combustion engine, an electric motor/generator and at least one elec... | 10/25/1994 |
| 5204548 | Energy storage circuit with DC chopper superconducting reactor A two-quadrant converter having a connected superconducting magnetic memory used as a chopper circuit or an actuator for stabilizing networks and for short-term bridging of power failures (e.g., uninterrupted power supply). For example, a two-quadrant con... | 04/20/1993 |
| 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 |
| 5181170 | High efficiency DC/DC current source converter A DC to DC converter has a transformer with a highly coupled primary and secondary, a first switch connected in series between a current source and the primary, a second switch connected across the current source in parallel with the first switch and the ... | 01/19/1993 |
| 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 |
| 5131233 | Gas-liquid forced turbulence cooling A cooling system employs a cooling liquid and a cooling gas in a combined thermodynamic cycle to overcome the flow resistance of dense assemblies of heat generating components and to improve heat transfer by inducing turbulence, thereby reducing the effec... | 07/21/1992 |
| 5041959 | Control system for a current source converter supplying an AC bus An electrical power converter including both DC and AC power terminals which are respectively connected to a DC current source and an AC voltage source, the latter comprising the grid of an AC power utility. A capacitor is coupled to the AC terminals alon... | 08/20/1991 |
| 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 |
| 4754384 | Triggerable superconductive switching means, and apparatus comprising the means Disclosed is a novel switching device. In its currently preferred embodiment the device comprises a conductive path that comprises a superconductive section, with the remainder of the path being non-superconductive, means for applying a voltage across the... | 06/28/1988 |
| 4709314 | Superconducting rectifier for the conversion of a relatively low alternating current into a relatively high direct current Superconducting rectifier for the conversion of a relatively low current from an alternating current supply source into a relatively high direct current, essentially consisting of a transformer, at least the secondary coil of which is constructed in semic... | 11/24/1987 |
| 4695932 | Superconductive energy storage circuit A circuit for storing energy delivered from an AC supply comprises a DC capacitor and a reversible chopper between an AC/DC reversible conversion circuit connected to the AC supply and a current supply circuit including a superconductive coil. This capaci... | 09/22/1987 |
| 4673888 | Power control system A power supply for providing an output voltage amplitude modulated by a command signal, includes a rectifier for rectifying the command signal, a comparator network for comparing the instantaneous rectified level of the command signal with a plurality of ... | 06/16/1987 |
| 4626701 | Rectifying circuit comprising a superconductive device A rectifying circuit includes a superconductive device and a circuit which controls a magnetic field to be applied to the superconductive device in response to the phase of an A.C. signal applied to the superconductive device, the state of the superconduc... | 12/02/1986 |
| 4609831 | Apparatus for transmitting energy to and from coils An apparatus for transmitting energy to and from superconductive coils, via a unipolar capacitor having a large capacitance. The apparatus is characterized by the use of two on-off self-controllable switches which are turned on and off under instructions ... | 09/02/1986 |
| 4608296 | Superconducting films and devices exhibiting AC to DC conversion Superconducting films and devices are provided which exhibit an AC to DC conversion effect of an RF AC input signal. The films can be microscopically inhomogeneous with granular or columnar microstructures in layered or nonlayered structures, which provid... | 08/26/1986 |
| 4599519 | Superconducting magnetic energy storage for asynchronous electrical systems A superconducting magnetic energy storage coil connected in parallel between converters of two or more ac power systems provides load leveling and stability improvement to any or all of the ac systems. Control is provided to direct the charging and indepe... | 07/08/1986 |
| 4584518 | Circuit for transmitting energy to and from coils A circuit for transmitting energy to and from coils is improved by connecting a coil to a bridge circuit composed of a diode and a switch such as a gate turn-off thyristor. An opposite polarity switch and diode construction may be used in addition to sele... | 04/22/1986 |
| 4493014 | Superconduction storage apparatus of electrical power A superconduction power storage apparatus includes a superconduction coil for storage and release of electrical energy, and a separately excited thyristor conversion unit having d.c. terminals connected to the said superconduction coil and a.c. terminals ... | 01/08/1985 |
| 4245287 | Method of controlling switching of a multiphase inductor-converter bridge In an inductor-convertor circuit for transferring electrical energy between a storage coil and a load coil using a storage thyristor bridge, a load thyristor bridge, and a set of commutating capacitors, operation is improved by a method of changing the ra... | 01/13/1981 |
| 4122512 | Superconductive energy storage for power systems Energy derived from an alternating current power system is stored in a superconducting magnet or inductor. The transfer of the energy is reversible so that the energy stored in the superconducting magnet can be returned to the alternating current power sy... | 10/24/1978 |
| 4079305 | Power supply for high power loads A power supply capable of transferring power at high current and voltage levels to a load which may be highly inductive. The power supply includes an inverter for receiving DC power and inverting it to an AC intermediate signal. The intermediate signal is... | 03/14/1978 |
| 4074343 | Electric current chopper Apparatus for electrically chopping a direct current signal by controlling the superconductivity state of resistance elements contained within a cryostat. The resistance elements are in a bridge arrangement and the control is provided by laser diodes also... | 02/14/1978 |
| 4044298 | Super conducting device with minimal pinning Type II superconductive materials having greatly diminished vortex pinning as a result of maintaining the ratio of the average scale of structural disorder of the materials to vortex core size to not greater than about 120% of the minimum such ratio, supe... | 08/23/1977 |
| 4032959 | Shielded superconducting inductor device An inductor device having a superconducting coil winding capable of maintaining a relatively large current flowing therethrough, and a normal conducting shield winding surrounding the superconducting coil. The superconducting coil and the shield are elect... | 06/28/1977 |
