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147results about How to "Loss in efficiency" patented technology
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Power supply control for power generator
ActiveUS7880334B2Loss in efficiencyAvoid powerDc network circuit arrangementsBatteries circuit arrangementsFuel cellsMicro power generator
A system (100) for connecting a fuel cell stack to an A.C. grid to provide power thereto is disclosed in which a voltage regulated D.C. bus (110) is provided to be coupled to the fuel cell stack, a bidirectional inverter (120) is coupled to the D.C. bus (110), and is to be coupled between the D.C. bus (110) and the A.C. grid. At least one D.C. auxiliary load (130) of the fuel cell stack is provided coupled to the D.C. bus (110). A D.C. to D.C. converter (140) is provided between the fuel cell stack and the D.C. bus (110).
Owner:CERES INTPROP CO LTD
Electroluminescent device aging compensation with reference subpixels
ActiveUS20110074750A1Accurate agingIncrease the aperture ratioCathode-ray tube indicatorsInput/output processes for data processingDriver circuitElectricity
An electroluminescent (EL) device including an illumination area having one or more primary EL emitters; a reference area having a reference EL emitter; a reference driver circuit for causing the reference EL emitter to emit light while the EL device is active; a sensor for detecting light emitted by the reference EL emitter; and a measurement unit for detecting an aging-related electrical parameter of the reference EL emitter while it is emitting light. The device further includes a controller for receiving an input signal for each primary EL emitter in the illumination area, forming a corrected input signal from each input signal using the detected light and the aging-related electrical parameter, and applying the corrected input signals to the respective primary EL emitters in the illumination area.
Owner:GLOBAL OLED TECH
Electroluminescent device aging compensation with reference subpixels
ActiveUS8339386B2Accurate agingAccurate compensationCathode-ray tube indicatorsInput/output processes for data processingDriver circuitElectricity
An electroluminescent (EL) device including an illumination area having one or more primary EL emitters; a reference area having a reference EL emitter; a reference driver circuit for causing the reference EL emitter to emit light while the EL device is active; a sensor for detecting light emitted by the reference EL emitter; and a measurement unit for detecting an aging-related electrical parameter of the reference EL emitter while it is emitting light. The device further includes a controller for receiving an input signal for each primary EL emitter in the illumination area, forming a corrected input signal from each input signal using the detected light and the aging-related electrical parameter, and applying the corrected input signals to the respective primary EL emitters in the illumination area.
Owner:GLOBAL OLED TECH
Photovoltaic power plant
ActiveUS20110273017A1Loss in efficiencyEasy to adaptDc network circuit arrangementsBatteries circuit arrangementsPower inverterElectricity
In large PV power plants, grounding of individual PV modules may lead to problems. The present invention overcomes such problems. The basis for the invention is a PV power plant comprising one or more PV generators, each comprising a PV string and an inverter with a DC input and an AC output. The PV string comprises at least one PV module and is electrically connected to the DC input of the inverter. The inverter comprises means for controlling the DC potential at the DC input depending on the DC potential at the AC output. The AC outputs of the inverters are coupled in parallel. The novel feature of the invention is that the PV power plant further comprises an offset voltage source, which controls the DC potential at the AC outputs. Thereby, the DC potential at the DC input will be indirectly controlled, and it is thus possible to ensure that the potentials with respect to ground at the terminals of the PV modules are all non-negative or all non-positive without grounding the PV modules. Ground loops can be avoided, and there is no need for the use of transformer-based inverters.
Owner:SMA SOLAR TECH AG
Planetary gearbox with integral electric motor and steering means.
InactiveUS6852061B2Improve efficiencySmall sizeElectric propulsion mountingDifferential gearingsGear wheelEngineering
A new, useful and compact wheel motor drive arrangement for applications on such construction equipment as scissor lifts and other similar scaffolding equipment where hydraulically driven systems have historically been used to provide power to the wheels to move the equipment is disclosed. An electric motor is mounted to a spindle bracket which is pivotably connected to the frame of the equipment to allow the unit to be pivoted around a vertical axis for steering purposes. A gear reducing planetary gear system is mounted around the drive shaft of the motor is positioned totally within the rotating wheel hub. The output ring gear of the planetary gear system is integrally formed to the interior of the wheel hub so that there is a direct application through the planetary gear system to the wheel hub to provide greater efficiency.
Owner:FAIRFIELD MFG CO INC
Damped crash attenuator
InactiveUS6203079B1Low level of energy absorptionImprove energy consumptionPortable framesPasturing equipmentEngineeringTruck
A crash attenuator for protecting a truck or stationary structure from damage resulting from impact of an object such as a vehicle including a frame mountable to a truck or stationary structure, a bumper having an impact-receiving face adapted to receive an impact from an object in a crash, a movable displacement structure coupled to the frame and interposed between the frame and the bumper and having a first position in which the bumper is relatively distant from the frame and a second position in which the bumper is relatively proximate to the frame, and an energy dissipation system coupled to the displacement structure for dissipating the impact energy of the object into the bumper which causes said displacement structure to be moved from the first position toward the second position.
Owner:AMERICAN VEHICULAR SCI
Tessellation of patches of surfaces in a tile based rendering system
A method and apparatus are provided for tessellating patches of surfaces in a tile based three dimensional computer graphics rendering system. For each tile in an image a per tile list of primitive indices is derived for tessellated primitives which make up a patch. Hidden surface removal is then performed on the patch and any domain points which remain after hidden surface removal are derived. The primitives are then shaded for display.
Owner:IMAGINATION TECH LTD
Controller and power source for implantable blood pump
ActiveUS20140194985A1Loss in efficiencyDigital data processing detailsControl devicesControl signalEmbedded system
Methods and apparatus for controlling the operation of, and providing power for and to, implantable ventricular assist devices which include a brushless DC motor-driven blood pump, are disclosed. In one embodiment, a control system for driving an implantable pump is provided. The digital processor is responsive to data associated with the operation of the pump received at the data transfer port, and from the program data stored in memory, (i) to determine therefrom, the identity of the pump, (ii) to determine therefrom, electrical characteristics and features of the identified pump, and (iii) to adaptively generate and apply to the data port, control signals for driving the identified pump. Latch mechanisms, an elongated flexible electrical cable with a strain relief segment, and a lower housing portion that is heavier than an upper housing portion, may also be provided with the control system.
Owner:HEARTWARE INC
Electroluminescent display compensated analog transistor drive signal
ActiveUS20090160740A1Raise the ratioSimple control signalStatic indicating devicesDriver circuitControl signal
Apparatus for providing an analog drive transistor control signal to the gate electrode of a drive transistor in a drive circuit that applies current to an EL device, the drive circuit including a first supply electrode of the drive transistor and the EL device connected to a second supply electrode of the drive transistor, comprising a measuring circuit for measuring the current passing through the supply electrodes at different times to provide an aging signal representing variations in the characteristics of the drive transistor and EL device caused by operation of the drive transistor and EL device over time; a compensator for changing a linear code value in response to the aging signal to compensate for the variations in the characteristics of the drive transistor and EL device; and a linear source driver for producing the analog drive transistor control signal in response to the changed linear code value.
Owner:GLOBAL OLED TECH
Power supply control for power generator
ActiveUS20080067869A1Loss in efficiencyAvoid powerDc network circuit arrangementsBatteries circuit arrangementsFuel cellsElectric power
A system (100) for connecting a fuel cell stack to an A.C. grid to provide power thereto is disclosed in which a voltage regulated D.C. bus (110) is provided to be coupled to the fuel cell stack, a bidirectional inverter (120) is coupled to the D.C. bus (110), and is to be coupled between the D.C. bus (110) and the A.C. grid. At least one D.C. auxiliary load (130) of the fuel cell stack is provided coupled to the D.C. bus (110). A D.C. to D.C. converter (140) is provided between the fuel cell stack and the D.C. bus (110)
Owner:CERES INTPROP CO LTD
Optical transmission systems, devices, and methods
ActiveUS7606494B1Improve operational flexibilityEfficient and low optical communicationMultiplex system selection arrangementsWavelength-division multiplex systemsCommunications systemTransmission system
Optical communications systems including grooming, protection, restoration, and migration on a unified network platform, and using a unified control plane. The systems may include combinations of optical bypass and mesh restoration, may include combinations of shared mesh and dedicate protection, and may be combinations of long haul, extended long haul, and ultra long haul systems. The systems may also include a configurable DWDM tier to accommodate dynamic traffic patterns, thereby allowing for increased operational flexibility.
Owner:LEVEL 3 COMM LLC
Method of setting parameters of a peripheral device and a peripheral device
InactiveUS20030051078A1Loss in efficiencyInput/output to record carriersMemory adressing/allocation/relocationControl engineeringControl theory
A method of setting a parameter of a peripheral device, the parameter controlling an operation of the peripheral device includes the steps of: a) collecting and storing a command issued for the peripheral device by an external device; b) analyzing a command issue pattern for the peripheral device based on the command stored in the step a); c) determining a most proper value of the parameter based on the command issue pattern; and d) setting the most proper value of the parameter determined in the step c) as a parameter for controlling the operation of the peripheral device.
Owner:TOSHIBA STORAGE DEVICE CORP
LED retrofit for fluorescent backlit signs
InactiveUS20110019413A1Quick installationMany componentLighting support devicesPoint-like light sourceSmart lightingLed array
Owner:ZIMMERMAN JAMES WILLIAM +2
Damped crash attenuator
InactiveUS6343821B2Low level of energy absorptionImprove energy consumptionSpringsPedestrian/occupant safety arrangementTruckMechanical engineering
A crash attenuator for protecting a truck or stationary structure from damage resulting from impact of an object such as a vehicle including a fame mountable to a truck or stationary structure, a bumper having an impact-receiving face adapted to receive an impact from an object in a crash, a movable displacement structure coupled to the frame and interposed between the frame and the bumper and having a first position in which the bumper is relatively distant from the frame and a second position in which the bumper is relatively proximate to the frame, and an energy dissipation system coupled to the displacement structure for dissipating the impact energy of the object into the bumper which causes the displacement structure to be moved from the first position toward the second position.
Owner:AMERICAN VEHICULAR SCI
Torque harnessing electric engine
An electric engine having four drive mechanisms, four piston coil systems that fire ninety degrees (90°) apart and cause a previously fired piston coil system to return to its original position when another piston is subsequently fired and four crank systems, wherein each drive mechanism comprises a metallic T-yoke, ring-shaped magnet, metallic hollowed cylinder; each piston coil system comprises a wire coil, coil ring / slab and non-metallic spacer / coil-rod-connector; and each crank system comprises a drive rod, crank rod, guide plate / rod guide, guide plate housing, crank system housing, non-metallic gasket and crankshaft.
Owner:BORCHERT SEAN
Doherty amplifier with input network optimized for MMIC
InactiveUS8354882B2Reduce dependenceLoss in efficiencyMultiple-port networksAmplifier combinationsAudio power amplifierPhase shifted
In a Doherty amplifier (100), the amplifier's input is connected to a main device (102) via a first branch and to a peak device via a second branch. The first branch has a first frequency-dependent input impedance with a first real part and a first imaginary part. The second branch has a second frequency-dependent input impedance with a second real part and a second imaginary part. The first and second imaginary parts have opposite polarity. The first and 5 second imaginary parts have a same magnitude so as to compensate each other in the frequency band. The first imaginary part and the second imaginary part implement a first phase shift in the. first branch and a second phase shift in the second branch, respectively. The first and second phase shifts each have a magnitude of substantially 45 degrees substantially in the middle of the frequency band and are of opposite polarity. The phase difference of the 10 input signals to the main (102) and peak (104) devices stays largely constant over the frequency band.
Owner:OPTIS CIRCUIT TECH LLC
Soap dispensing units with anti-drip valve
ActiveUS8678244B2Enhanced anti-drip and primability benefitAvoid accidentsLiquid flow controllersLarge containersEngineeringSoap dispenser
A soap dispenser can be configured to dispense an amount of liquid soap, for example, upon detecting the presence of an object. Certain embodiments of the dispenser include a housing, reservoir, pump, and nozzle. In some embodiments, the dispenser includes a bypass passage, which can facilitate priming of the pump. In certain embodiments, the dispenser is configured to inhibit or avoid the formation of an air bubble that could obstruct the liquid soap from entering the pump. In some embodiments, the pump includes engaging gears, which can include a plurality of teeth with substantially pointed tips. In certain embodiments, the nozzle comprises a one-way valve, such as a duckbill valve. Some embodiments of the one-way valve are shaped or otherwise configured to provide certain biases to the valve, which can, for example, facilitate rapid opening and closing of the valve.
Owner:SIMPLEHUMAN
Method and apparatus for controlling the charge of a bootstrap capacitor for non-synchronous type DC-DC converter
ActiveUS20070024261A1Loss in efficiencyEfficient power electronics conversionApparatus without intermediate ac conversionCapacitanceDc dc converter
A method of controlling the charge of the bootstrap capacitor during light load or no load conditions for a non-synchronous type of DC-DC converter consists of bootstrap capacitor voltage detector, light load detector and secondary switch controller. By turning on the secondary switch during the off-time of the power transistor when the bootstrap voltage is lower than the required value under light load condition, the bootstrap capacitor voltage will be able to charge back to the required value, yet minimizing the minimum current requirement for the DC-DC converter.
Owner:NUVOTON TECH CORP JAPAN +1
HVAC system and method for conditioning air
InactiveUS6755035B1Loss in efficiencyOperational expenseMechanical apparatusSpace heating and ventilation safety systemsHVACMoisture
Outside air is treated to remove moisture before it enters the conditioned air space of a store or other building containing refrigeration furniture. The sensible air temperature and relative humidity measurements are taken to allow microprocessor calculations of the wet bulb temperature. A pair of unequal sized compressors of the HVAC system are then cycled in stages for peak efficiency and minimum compressor horsepower usage for low cost operation and minimal energy consumption both of the HVAC system and the refrigeration furniture. The wet bulb temperature is converged by the microprocessor which iterates a known polynomial approximately every 6 seconds to derive the wet bulb temperature. A time delay circuitry set at approximately 30 minutes prevents unnecessary staging of the compressors.
Owner:TRS SESCO LLC
System and method for string processing and searching using a compressed permuterm index
InactiveUS20090063465A1Loss in space efficiencyLoss in time efficiencyDigital data information retrievalSpecial data processing applicationsWildcard characterString processing
An improved system and method for string processing and searching using a compressed permuterm index is provided. To build a compressed permuterm index for a string dictionary, an index builder constructs a unique string from a collection of strings of a dictionary sorted in lexicographic order and then builds a compressed permuterm index to support queries over the unique string. A dictionary query engine supports several types of wild-card queries over the string dictionary by performing a backward search modified with a CyclicLF operation over the compressed permuterm index. These queries may used to implement other queries including a membership query, a prefix query, a suffix query, a prefix-suffix query, a query for an exact or substring match, a rank query, a select query and so forth. String processing and searching tasks may accurately be performed for sophisticated queries in optimal time and compressed space.
Owner:OATH INC
Compressor stabilizer
InactiveUS20100143111A1Mean play can be increasedLoss in efficiencyPump componentsEngine fuctionsImpellerEngineering
Owner:ABB TURBO SYST
Omni-directional antenna for mobile satellite broadcasting applications
InactiveUS20090027294A1Reduce in sizeLoss in efficiencyAntenna arraysSimultaneous aerial operationsOmnidirectional antennaPhysics
An antenna for mobile satellite communication is disclosed. The antenna may include an electrically conducting ground plane and at least a first and a second radiating element. Each one of the radiating elements may be electrically coupled to a feed line, whereby each one of said at least first and second radiating elements may be electrically connected to the ground plane at one end and being open-circuit at an opposite end, whereby the at least first and second radiating elements may intersect at a feeding point of the feed line and extend radially with respect to the elongation of the feed line.
Owner:JAST
Aircraft Engine Fuel Supply
ActiveUS20110139123A1Increase power consumptionGood optimization in term of weight and power consumptionEngine fuctionsTurbine/propulsion fuel deliveryCentrifugal pumpFuel supply
A centrifugal pump driven by mechanical coupling with an engine has a low pressure inlet receiving fuel from a fuel circuit of an aircraft, a high pressure outlet connected to a regulator circuit for regulating the flow rate of fuel supplied to the engine, and an assistance pump unit that is electrically controlled, having an inlet connected to the aircraft fuel circuit and an outlet connected to the flow rate regulator circuit so as to deliver, via its outlet, fuel that is at a predetermined minimum pressure, the pressure of the fuel supplied to the regulator circuit being the higher of the pressures delivered by the centrifugal pump and the assistance pump unit.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
Beam projection systems and methods
InactiveUS20100165306A1Increase demandMinimizing its growthProjectorsCondensersCamera lensLight beam
Throughput efficiency of an optical system is enhanced by using a directional light source coupled to a non-imaging optical element matched to a size and acceptance angle of an imaging lens. In various embodiments, a beam projection system and accompanying method are described that include a lamp body formed from a dielectric material. A bulb, placed adjacent to the lamp body, has a fill that forms a plasma when RF power is coupled to the fill from the lamp body. An optical train is optically coupled to the bulb to transform light generated by the plasma. The optical train includes a non-imaging optical element, an aperture, and at least one imaging lens element.
Owner:LUXIM CORP
Magnetically Actuated Reciprocating Motor and Process Using Reverse Magnetic Switching
InactiveUS20140117786A1Easy to operateReduce manufacturing costMechanical energy handlingEngineeringElectromagnetic field
A magnetically actuated reciprocating motor utilizes the stored energy of permanent magnets and an electromagnetic field to reciprocally drive a magnetic actuator. A converting mechanism converts the reciprocating motion of the magnetic actuator to power a work object. A solenoid, comprising a nonferromagnetic spool having a tubular center section with a coil of wire wrapped around the center section, is connected to a source of power and a switching mechanism. The magnetic actuator has permanent magnets disposed inside each end of an elongated tubular shaft, which is reciprocatively received through the center section of the solenoid. The inward ends of the magnets are disposed in spaced apart relation to form a gap therebetween. The switching mechanism switches the magnetic polarity at the ends of the solenoid so as to alternatively repel and attract the permanent magnets to reciprocate the magnetic actuator. A controlling mechanism controls the switching mechanism.
Owner:GOSVENER KENDALL C
Converter control device and air conditioner including converter control device
InactiveUS8941347B2Reduce noiseLoss in efficiencyAC motor controlAc-dc conversion without reversalPower conditionerSwitching signal
Owner:MITSUBISHI ELECTRIC CORP
Wind energy installation comprising a seawater or brackish water desalination plant
InactiveUS7029576B2Double efficiency lossLow costGeneral water supply conservationWind motor supports/mountsRaw waterSeawater
A wind energy installation having a tower, a gondola supported by the tower, a rotor mounted in the gondola, and at least one pressure pump that is mechanically driven by the rotor and that feeds a raw water-treating reverse osmosis plant, the components of the reverse osmosis plant being arranged within the tower.
Owner:AERODYN ENG GMBH
Light mixing chamber for use with color converting material and light guide plate and assembly
ActiveUS20150362654A1High color gamutImprove efficiencyMechanical apparatusVehicle interior lightingLight guideQuantum dot
A light mixing chamber of a backlight includes a housing having a channel and a chamber exposed to the channel, an LED positioned within the chamber, and a capillary containing quantum dots positioned in the channel. A light guide plate is positioned adjacent the housing and adjacent the capillary. Relative dimensions of the elements of the light mixing chamber, as well as features added to the elements of the light mixing chamber, can be varied to balance efficiency and uniformity of light generated in the backlight.
Owner:SAMSUNG ELECTRONICS CO LTD
Motor drive apparatus and motor drive method
ActiveUS7626350B2Loss in efficiencyLow costTorque ripple controlAC motor controlVoltage generatorMotor drive
A motor drive apparatus and motor drive method reduce vibration and acoustic noise by not requiring a non-activation period for rotor position detection, and enable stable, high efficiency motor drive. A control voltage generator generates a control voltage based on the frequency of the speed signal FG output from a speed detection unit, and the amplitude of the control voltage is controlled based on a torque control signal EC. The phase difference generator detects the phase difference between the control voltage and the zero cross signal of the motor current detected from the motor terminal voltages. A control voltage generator controls the phase of the control voltage so that the phase difference goes to zero, thus accomplishing sensor-less motor drive.
Owner:COLLABO INNOVATIONS INC
Turbine blade assembly
InactiveUS20100178173A1Easy to disassembleEasy to assemblePropellersRotary propellersTurbine bladeGas turbines
A turbine blade assembly, which can be used for a gas turbine is provided. The turbine blade assembly includes turbine blades with platforms, gaps between the platforms of adjacent turbine blades and seals. Each seal covers the gap between the platforms of two adjacent turbine blades wherein the platforms are provided with slots extending in the downstream flow direction. The turbine blades have root cavities, wherein the seal covers at least the whole length of the root cavities of two adjacent turbine blades. The seal is formed from a strip and the seal is placed in two opposed slots formed in each of the platforms of two adjacent turbine blades and open towards the respective downstream ends.
Owner:SIEMENS AG
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