rt Rail support arrangement By www.freepatentsonline.com Published On :: Tue, 14 Oct 2014 08:00:00 EDT An arrangement for supporting a rail extending in the longitudinal direction and having curvature, which is configured to vary, in the vertical or horizontal plane. The arrangement comprises at least one support beam extending in the longitudinal direction, the support beam having a support surface extending along its length, the support surface being curved along the length of the support beam. The arrangement further comprises at least one rail extending in the longitudinal direction and supported over the support surface of the at least one support beam. Full Article
rt Method for manufacturing a resilient rail support block assembly By www.freepatentsonline.com Published On :: Tue, 25 Nov 2014 08:00:00 EST A rail support block assembly includes a resilient member and a molded block having a top, a bottom and peripheral wall. The block is adapted for fastening one or more rails on the top. The prefabricated resilient member has an outer tray and inner tray arranged within the outer tray, and includes a resilient intermediate structure between the trays. The block is molded in a block mold into with the moldable material is introduced and allowed to harden. The block is fixed in the inner tray to extend under the bottom of the block and along a lower region of the peripheral wall. The resilient member may form a part of the block mold, so that a mold member combined with the resilient member delimit the mold for the block. The moldable material is introduced and adheres directly to the inner tray of the prefabricated resilient member. Full Article
rt Leveling rail joints with oblique support By www.freepatentsonline.com Published On :: Tue, 23 Dec 2014 08:00:00 EST A joint between connected ends of two rails of different height is provided with a connector/juncture bar member which is configured to fit with and engage corresponding surfaces formed on the rails when the rails are connected together. The joint so formed is one with increased strength, with ease and accuracy of alignment during assembly. Full Article
rt Surface covering for enabling a surface to be crossed, in particular by vehicles By www.freepatentsonline.com Published On :: Tue, 28 Apr 2015 08:00:00 EDT The present invention provides a surface covering for enabling a surface, e.g. of the uneven, muddy, marshy, or sandy ground type, to be crossed by a vehicle, said surface covering including a double-ply textile core having two covered faces, each covered with at least one polymer layer, and a plurality of through tubular pockets extending substantially transversely through the thickness of the core between the two layers, and enabling respective stiffener bars to be inserted into each tubular pocket so as to make it possible, in particular, to increase the drivability and the load-bearing capacity of the surface when the surface covering is positioned on said surface. Full Article
rt Assembly for producing paper packaging for fast food, particularly comprising deep coated pleats By www.freepatentsonline.com Published On :: Tue, 31 Mar 2015 08:00:00 EDT The present invention relates to the description of machine-assisted production assemblies and to the optimization thereof, said assemblies having, built therein, a patented device for folding into deep coated folds, thus making it possible to create paper packaging for fast food, said assemblies all comprising a folded element from a folded paper strip 31. Said machines are modular and all comprise, upstream, an assembly of modules 5, 6, and 7 that supply a folded paper strip 31 that is then converted in a specific finishing module 8 for making, from said lidded paper strip, a packaging for a sandwich or loose product such as fries or chicken pieces. Full Article
rt Pouch with rigid handle and supports By www.freepatentsonline.com Published On :: Tue, 31 Mar 2015 08:00:00 EDT Provided are pouches with rigid handles and/or internal supports and methods of making such pouches. In one aspect, a pouch with internal support includes a flexible pouch including a fitment coupled to a flexible pouch body and at least one inner support piece coupled to the fitment and extending into the inside of the pouch through the interior of the fitment. The fitment includes a fitment inner engagement feature and the at least one inner support piece includes an inner support engagement feature and at least one inner support extending from the inner support engagement feature. The fitment inner engagement feature and inner support engagement feature are interlocked to keep the at least one inner support piece from falling into or out of the flexible pouch body. Full Article
rt Self-supporting storage bag with resealable pour spout By www.freepatentsonline.com Published On :: Tue, 31 Mar 2015 08:00:00 EDT A reclosable bag or pouch configured to store, and to easily pour, material. The reclosable bag is configured with an integral pour spout having a reclosable fastener to facilitate the pouring of material from the bag, and subsequent resealing. By locating the pour spout along an upper side of the bag, material is focused downward from the bag, and not outward, when poured. Bags configured in this manner thus provide end users with enhanced control over the dispensing rate and direction of their contents. In some embodiments, the bag is also configured as a self-supporting bag capable of resting generally upright upon its bottom end. Full Article
rt Bag with detachable hanging accessory portion By www.freepatentsonline.com Published On :: Tue, 14 Apr 2015 08:00:00 EDT In an embodiment of the disclosed technology, a bag is used for transporting and organizing items. The bag is generally formed of a removably attachable upper and a lower portion. The upper portion forms at least a portion of one side of the bag and is attached to the lower portion by a fastening mechanism. The lower portion forms the bottom and at least a portion of the sides of the bag. The upper portion is detachable to provide a hanging accessory organizer, having pockets and suspension device. In embodiments of the disclosed technology, access to the bag may be provided by an additional fastenable opening. Zippers may be used as the fasteners, and may run parallel to one another, completely or partially surrounding the perimeter of the upper portion. Full Article
rt Flexible container for packaging, in particular in sterile conditions, of food products and relative package comprising said flexible container By www.freepatentsonline.com Published On :: Tue, 28 Apr 2015 08:00:00 EDT The present invention regards a package (1) for food products comprising a flexible container (2) having a first wall (5) and a second wall (6) opposite each other and peripherally sealed along at least the respective side edges (5a, 6a, 5b, 6b), a space (8) inside said walls containing, optionally in sterile conditions, a food product (73), and a gusset element (10) extended between the upper edges (5c, 6c) of said first wall (5) and of said second wall (6), said gusset element (10) defining a pocket (14) turned towards the interior of said flexible container (2), characterized in that it comprises an opening and closing device (3) housed in said pocket (14) and constrained to said flexible container (2), said opening and closing device (3) comprising a pourer body (15) associated with an opening and closing cap (16), and cutting means (42) suitable to perforate said flexible container (2) at the time of the first opening of said packaging (1). The invention also regards a method for packaging a food product, in particular in sterile conditions, in a package of the aforesaid type, a flexible container for a package of the aforesaid type as well as a method for producing such container. Full Article
rt Gift bags with removable, configurable and wearable parts By www.freepatentsonline.com Published On :: Tue, 19 May 2015 08:00:00 EDT Gift bags with removable, configurable and wearable parts and components have multiple interconnected panels which include a bottom panel and multiple interconnected generally vertically oriented side panels which together form a bag or container with an interior volume which is accessible through an opening. Incorporated into or attached to one or more of the side panels or bottom panel are articles or components, structures or objects which fit with one or more of the side panels. The articles, components, structures or objects are detachable from the one or more side panels. The removable components are preferably secured to or made integral with any of the side panels by structures, devices or materials by which the components are both structural; aesthetic, decorative or ornamental, yet also relatively easily detachable. Full Article
rt Utensil manipulating article By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A utensil manipulating article has a sleeve formed of a pliable material. The sleeve is suitable for receiving the utensil therein. The sleeve is movable between a utensil-receiving position and a utensil-manipulating position. The sleeve has an adhesive material on an outer surface thereof. The adhesive is suitable for attaching to fingers of a user so as to allow the user to move the sleeve between the utensil-receiving position and the utensil-manipulating position. The adhesive material includes a first adhesive strip and second adhesive strip respectively placed on a first side and an opposite side of the sleeve. A liner is removably affixed over the first and second adhesive strips. Full Article
rt Device for locking an opening part of a jet engine nacelle with respect to a fixed part, and nacelle equipped with such a device By www.freepatentsonline.com Published On :: Tue, 14 Apr 2015 08:00:00 EDT This device for locking an opening part (9) of a jet engine nacelle with respect to a fixed part (7, 17) comprises: means (13, 16) for locking said opening part (9) with respect to said fixed part (7, 17), means for actuating (21) these locking means that are mounted such that they can move on said opening part (9) between a closed position, in which they enable said locking means (13, 16) to be immobilized, and an open position, in which they enable these locking means (13, 16) to be released. Said actuating means comprise gripping means (21). This device comprises means (41, 43) for immobilizing, in the open position, said gripping means (21) with respect to said opening part (9) at least in the direction of movement of said opening part (9). Full Article
rt Fly-cutting system and method, and related tooling and articles By www.freepatentsonline.com Published On :: Tue, 14 Apr 2015 08:00:00 EDT Methods of fly-cutting a workpiece are disclosed, and in methods in which the position of a fly-cutting head or its associated cutting element is known as a function of time. Also disclosed are methods of forming features, such as grooves or groove segments, in a workpiece such as a cylindrical roll. The features may be provided according to one or more disclosed patterns. Articles made using tools machined in the manner described are also provided, such as polymeric film or sheeting that exhibit certain beneficial properties. Full Article
rt Support ring for a rotary assembly By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A support ring for a rotary assembly such as a propeller assembly includes support cups for receiving blade roots of propeller blades. The support cups are interconnected by bridging structures. Each bridging structure includes bridging walls which extend radially from a bridging web. The bridging structures thus have a channel-shaped cross-section. The bridging walls have a scalloped configuration at their radially outer edges. As a result of this configuration, the neutral axes of the bridging structures are straight, so that the support ring behaves, in structural terms, as a polygon. Full Article
rt Wind turbine blade and method for manufacturing a wind turbine blade with vortex generators By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A wind turbine for generating electrical energy may include a wind turbine blade including a plurality of vortex generators integrally formed in the outer surface of the blade. The vortex generator includes a first component that defines a portion of the outer surface of the blade and a second component defining the shape of the vortex generator and at least partially surrounded by the first component. A method of manufacturing the wind turbine blade includes disposing a first plurality of layers of structural material over a mold main body and a removable insert member with a shaped cavity. A shaped plug is then pressed into the shaped cavity, and a second plurality of layers of structural material is disposed over the plug and the mold main body to complete manufacture of a wind turbine blade with a vortex generator. Full Article
rt Blade skirt By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A blade of a gas turbine engine is provided having an airfoil, a platform, a shank, a dovetail, and a skirt. The airfoil may extend distally from the platform, and the shank may extend proximally from the platform. The dovetail may also be provided to extend proximally from the shank. The skirt may be disposed on an aft side of the shank and may extend from the shank in a direction at least partially axially aft from the shank. Full Article
rt Power converter, X-ray CT apparatus, and X-ray imaging apparatus By www.freepatentsonline.com Published On :: Tue, 19 May 2015 08:00:00 EDT A power converter is configured to include an inverter which converts a DC output into an AC voltage of a predetermined frequency, and a high voltage generator which receives an output from output terminals of the inverter and boosts the output to a desired high DC voltage. The high voltage generator includes a transformer, and the primary windings of the transformer are connected to the output terminals of the inverter in parallel by conductive wires connected to both ends of each primary winding. Further, a current sensor is provided to detect a current flowing through each of the primary windings, and a control unit determines abnormalities of a path of the inverter and the primary windings on the basis of a value of the current sensor. Full Article
rt System and method for correcting for metal artifacts using multi-energy computed tomography By www.freepatentsonline.com Published On :: Tue, 19 May 2015 08:00:00 EDT A method is provided. The method includes acquiring a first dataset at a first energy spectrum and a second dataset at a second energy spectrum. The method also includes extracting a metal artifact correction signal using the first dataset and the second dataset or using a first reconstructed image and a second reconstructed image generated respectively from the first and the second datasets. The method further includes performing metal artifact correction on the first reconstructed image using the metal artifact correction signal to generate a first corrected image. Full Article
rt Nondestructive examination of structures having embedded particles By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A system comprises a structure having particles embedded at a level within the structure, and X-ray imaging apparatus for capturing images of the particles at the level. Full Article
rt Method and device for injecting a fluid into an artificial venous structure By www.freepatentsonline.com Published On :: Tue, 19 May 2015 08:00:00 EDT A training device for sclerotherapy. The device includes at least one artificial venous structure adapted to contain a fluid, a reservoir, and a fluid path connecting the artificial venous structure to the reservoir. Full Article
rt Dry-erase board with inserts By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A new design for a dry-erase board allows for writing on a clear top surface or a second surface under the clear top surface. The dry-erase board includes an insert positioned between the clear top surface and a second surface, the insert being protected by the clear top surface Full Article
rt LINE PRINTING WITH PROPORTIONAL SPACING AND JUSTIFICATION By www.freepatentsonline.com Published On :: Tue, 05 May 1970 08:00:00 EDT Full Article
rt Vehicle front part structure By www.freepatentsonline.com Published On :: Tue, 07 May 2002 08:00:00 EDT A vehicle front part structure includes right and left front side frames provided rightwardly and leftwardly of and extending longitudinally of a vehicle body. A front bumper beam is attached to front ends of the right and left front side frames and extends transversely of the vehicle body. Right and left substays extend downwardly from front parts of the right and left front side frames. The right and left substays have lower parts connected to each other through a front lower cross member. Each of the right and left substays has first portions coupled through fastening members to and has second portions coupled through fillet welding to the respective front parts of the right and left front side frames. Full Article
rt Signal modulation scheme determination through an at least fourth-order noise-insensitive cumulant By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT Various embodiments associated with an at least fourth-order cumulant of a signal are described. The at least fourth-order noise-insensitive cumulant of the signal can be taken and compared against an at least fourth-order noise-insensitive cumulant of known signals. A match can be found between the signal and a known signal and from this match, a demodulation scheme of the signal can be determined. The demodulation scheme can be used to demodulate the signal. Full Article
rt Transport stream generating device, transmitting device, receiving device, and a digital broadcast system having the same, and method thereof By www.freepatentsonline.com Published On :: Tue, 11 Aug 2015 08:00:00 EDT A transport stream (TS) generating apparatus, a transmitting apparatus, a receiving apparatus, a digital broadcast system having the above, and a method thereof are provided. The digital broadcast system includes a transport stream (TS) generating apparatus which generates a multi transport stream (TS) by multiplexing a normal stream and a turbo stream having a variable coding rate, a transmitting apparatus which re-constructs the multi TS by processing the turbo stream, and transmits the re-constructed multi TS, and a receiving apparatus which receives the re-constructed multi TS, and decodes the normal stream and the turbo stream respectively, to recover normal data and turbo data. Accordingly, a multi TS, which includes normal stream and a turbo stream of various coding rates, can be transmitted and received efficiently. Full Article
rt Quarter wave plate polarizer with two phase-shifting portions By www.freepatentsonline.com Published On :: Tue, 19 May 2015 08:00:00 EDT A right circular cylindrical body of an isotropic dielectric such as a cross-linked styrene copolymer, has respective pluralities of mutually parallel grooves formed in its axial end faces, spaced apart by an intermediate portion whose dimension c is a half wavelength. The axial lengths a, b of the grooves are such that when a wave passes through the body, a quarter wavelength phase difference is produced between a component of a wave having its E-vector parallel to the grooves and a component of the wave having its E-vector orthogonal to the grooves. Alternatively the plate may consist of two or more discrete bodies whose grooves are dimensioned to produce a total differential phase shift of one quarter wavelength. Full Article
rt Virtual RF sensor By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A radio frequency (RF) generation system includes an impedance determination module that receives an RF voltage and an RF current. The impedance determination module further determines an RF generator impedance based on the RF voltage and the RF current. The RF generation system also includes a control module that determines a plurality of electrical values based on the RF generator impedance. The matching module further matches an impedance of a load based on the RF generator impedance and the plurality of electrical components. The matching module also determines a 2 port transfer function based on the plurality of electrical values. The RF generation system also includes a virtual sensor module that estimates a load voltage, a load current, and a load impedance based on the RF voltage, the RF generator, the RF generator impedance, and the 2 port transfer function. Full Article
rt Artificial microstructure and artificial electromagnetic material using the same By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT The present invention provides an artificial microstructure employed in an artificial electromagnetic material. The artificial microstructure includes a first segment, a second segment, and a third segment. The first segment is parallel to the second segment, and the third segment is connected between the first segment and the second segment. The artificial electromagnetic material has a special electromagnetic effect. The artificial electromagnetic material can be applied to various electromagnetic application systems instead of the typical electromagnetic material. Full Article
rt Minimal intrusion very low insertion loss technique to insert a device to a semi-rigid coaxial transmission line By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A signal conditioning apparatus can include a coaxial cable having at least one slot formed therein. A conductive film can be applied to the coaxial cable so as to cover each slot. A device mounting surface can be formed within the slot and a protection device can be mounted on the device mounting surface. A housing consisting of one or more interlockable portions can be coupled to the coaxial cable. Full Article
rt Mechanically short multi-carriage tuner By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT Mechanically short multi-carriage impedance tuners use meandering slabline structures. The meandering structure reduces the overall tuner length by a factor of 2.5 at 0.4 GHz. The critical issue of slabline bends is addressed with several low loss, low reflection alternatives. A preferred configuration comprises a vertical-horizontal slabline transition. Cable connections are discarded because of reflections and insertion loss. Measured results show acceptable performance. The tuner is mostly interesting for relatively lower microwave frequencies, such as 1 GHz. Full Article
rt Multidirectional fiber-reinforced tape/film articles and the method of making the same By www.freepatentsonline.com Published On :: Tue, 07 Oct 2014 08:00:00 EDT High tenacity, high elongation multi-filament polymeric tapes as well as ballistic resistant fabrics, composites and articles made therefrom. The tapes are fabricated from multi-filament fibers/yarns that are twisted together, bonded together, compressed and flattened. Full Article
rt Gripper head for the insertion of weft threads on a gripper weaving machine By www.freepatentsonline.com Published On :: Tue, 04 Nov 2014 08:00:00 EST A gripper head for the insertion of weft threads on a gripper weaving machine as well as a gripper weaving machine with such a gripper head. The gripper head thread clamp for the weft thread is controlled in a contact-free manner and with high transfer reliability of the weft thread even in the machine center. Full Article
rt High strength ultra-high molecular weight polyethylene tape articles By www.freepatentsonline.com Published On :: Tue, 09 Dec 2014 08:00:00 EST Processes for the production of high strength polyethylene tape articles from high strength ultra-high molecular weight multi-filament yarns, and to the tape articles, fabrics, laminates and impact resistant materials made therefrom. Full Article
rt Device for making woven article By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A device for making a woven article from a plurality of strings includes a base, a post, first and second engagement devices and a stabilization device. The base has a plurality of slots formed therein. The first engagement device engages first ends of the strings and is fixedly attached to the base and fixed relative to the slots, thereby fixing the first ends relative to the base. The second engagement device is fixedly attached to the base and includes a plurality of slits each configured to secure a corresponding one of the strings. The slots formed in the base are disposed between and spaced apart from the first and second engagement devices. The stabilization device is removably engageable with a selected one of the slots and is configured to engage a selected portion of the strings between the first and second engagement devices to restrict twisting of the strings. Full Article
rt Method for operating an automated guided, mobile assembly and/or material transport unit and automated guided, mobile assembly and/or material transport unit therefor By www.freepatentsonline.com Published On :: Tue, 19 May 2015 08:00:00 EDT A method for operating a driverless, mobile assembly and/or material transport unit as a driverless transport system (DTS) with fixed assembly and/or warehousing stations. In this method, a system control device is used for the entire assembly process. The driverless, mobile assembly and/or material transport units comprises a travel device for the traveling movement of the unit, a drive device for the travel device, an energy storage device for providing the energy for the drive device and a control device for controlling the traveling movement in coordination with the system control device. Full Article
rt Systems and methods for detecting ultracapacitor cell short circuits By www.freepatentsonline.com Published On :: Tue, 19 May 2015 08:00:00 EDT A system for detecting a short-circuited ultracapacitor cell in a machine is disclosed. The system may have a memory that stores instructions and one or more processors capable of executing the instructions. The one or more processors may be configured to perform cell balancing among ultracapacitor cells arranged within two or more ultracapacitor modules, each ultracapacitor module including at least two ultracapacitor cells connected in series. The one or more processors may be further configured to measure a module voltage generated by each of the plurality of ultracapacitor modules after performing the cell balancing and before applying a load of the machine to the ultracapacitor modules, and determine whether an ultracapacitor cell among the plurality of ultracapacitor cells is short-circuited based on a comparison of the measured module voltages. Full Article
rt Method to facilitate opportunity charging of an electric vehicle By www.freepatentsonline.com Published On :: Tue, 19 May 2015 08:00:00 EDT A method for electrically charging a high-voltage battery of a subject vehicle includes resolving a geographic location of the subject vehicle at a remote charging site, electrically charging the high-voltage battery through a connection of the subject vehicle to an electric power outlet at the remote charging site, monitoring cumulative electric power flow to the high-voltage battery of the subject vehicle, communicating the cumulative electric power flow to a central server, and reconciling billing for the cumulative electric power flow between an owner of the subject vehicle and an owner of the remote charging site. Full Article
rt Portable solar power supply By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A portable solar power supply includes a solar-powered charger including a solar cell; a circuit board including a power management unit, a buck-boost converter unit, a charging control unit, a data management unit, an on/off switch, a set of indicators, a power inlet, a power outlet, a first connector, a wireless communications member, a line transmission member, a data storage member, an RFID member, an SD card member, a USB port, a Micro USB port, and a solar charging member; and holes; and a rechargeable battery including at least one electrochemical cell each shaped to partially contain the solar-powered charger and including a second connector, a third connector, snapping members, and slots. The second connector is capable of connecting to the first connector or the third connector, and the snapping members are capable of being retained in the holes or the slots. Full Article
rt Multi-orientation stand for a portable electronic device By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A stand for a portable electronic device includes a device receiving side including a coupling component for engaging with the portable electronic device when the portable electronic device is in a first orientation relative to the device receiving side and when the portable electronic device is in a second orientation relative to the device receiving side. The stand also includes a first support side adjacent to the device receiving side to act as a base when the portable electronic device is in the first orientation, and a second support side adjacent to the first support side to act as a base when the portable electronic device is in the second orientation. Full Article
rt Apparatus for minimizing self-discharge of a smart battery pack By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT An apparatus for minimizing self-discharge of a smart battery pack is provided. During initial storage of the smart battery pack (100), prior to be being charged, a self-discharge protection circuit (110) disables smart battery circuitry (130). A minimal current drain is maintained while the smart battery circuitry (130) is disabled. Upon coupling of the smart battery pack (100) to a charger, the protections circuit (110) enables the smart battery circuitry (130). Battery packs having to be shipped with partially drained cells as part of shipping precaution requirements are no longer faced with the additional drainage problem previously caused by the smart battery circuitry (130) during storage. Full Article
rt Automatic start/stop device for engine-driven power generator By www.freepatentsonline.com Published On :: Tue, 18 Nov 2014 08:00:00 EST Starting and stopping an engine is automatically controlled based on a load without using a relay. An inverter engine-driven power generator has an alternator, a rectifying circuit, a DC/DC converter, and an inverter circuit. A load detection circuit is connected to an output of the inverter circuit in parallel. A load detection line of the load detection circuit is connected to an output line of the inverter circuit in parallel via resistors. A power supply formed of a battery is connected to the load detection line. A decision circuit outputs a load detection signal when a current having a preset value or more flows through the load detection line. A drive/stop CPU starts the engine in response to the load detection. The resistors are set at a resistance value which does not influence a load to which a generator output is supplied. Full Article
rt Automatic start and stop of a portable engine driven power source By www.freepatentsonline.com Published On :: Tue, 25 Nov 2014 08:00:00 EST The present embodiments provide a control system and method that is able to automatically start and/or stop a portable engine-driven power source. For example, in one embodiment, a system includes an engine-driven power source having an engine, a compressor driven by the engine, a sensor configured to generate a first signal indicative of a demand for air pressure from the compressor and a second signal indicative of no demand for air pressure from the compressor. The engine-driven power source also includes a controller configured to stop the engine in response to the second signal. Full Article
rt Vehicle rotary electric machine capable of safely starting synchronous rectification By www.freepatentsonline.com Published On :: Tue, 25 Nov 2014 08:00:00 EST A rotary electric machine for a vehicle that is capable of starting synchronous rectification through switching elements after having ensured absence of a short circuit fault. The rotary electric machine includes a multi-phase armature winding, a switching element set that includes a plurality of pairs of upper-arm and lower-arm switching elements to form a bridge rectification circuit together with the armature winding, an on/off-timing setter that sets on/off-timing of each switching element, a switching element driver that drives each switching element at the on/off-timing set by the on/off-timing setter; and a synchronous control start determiner that determines timing when an energization period for the upper-arm switching element and an energization period for the lower-arm switching element occur alternately as start timing of the synchronous rectification. Full Article
rt Inverter generator By www.freepatentsonline.com Published On :: Tue, 23 Dec 2014 08:00:00 EST An inverter generator used in combination with a motor and an ECU generating a pulse at each predetermined rotation angle of the motor is comprised of: an electric generator driven by the motor configured to generate alternating current electric power; estimating means for estimating an electrical angle of alternating voltage of the alternating current electric power from the pulse, the estimating means being electrically connected with the ECU; a converter configured to convert the alternating current electric power into direct current electric power, the converter electrically connected with the electric generator and the estimating means; and an inverter configured to convert the direct current electric power into alternating current output electric power, the inverter electrically connected with the converter. Full Article
rt Systems for wound field synchronous machines with zero speed rotor position detection during start for motoring and improved transient response for generation By www.freepatentsonline.com Published On :: Tue, 06 Jan 2015 08:00:00 EST An electrical machine includes a stator having a main armature winding, an exciter field winding, and a transformer primary winding. A rotor is operatively connected to rotate relative to the stator, wherein the rotor includes an exciter armature winding operatively connected to the exciter armature winding for field excitation therebetween, a main field winding operatively connected to the main armature winding for field excitation therebetween, and a transformer secondary winding operatively connected to the transformer primary winding to form a rotating transformer. A generator control unit is operatively connected to the main armature winding, exciter field winding, and transformer primary winding to control the main armature and exciter field windings based on excitation in the primary winding received from the transformer secondary winding. Full Article
rt Method of controlling rotating main field converter By www.freepatentsonline.com Published On :: Tue, 10 Mar 2015 08:00:00 EDT A generator system includes a generator having a stationary portion and a rotating portion. An exciter field winding and a main armature winding are disposed on the stationary portion. An exciter armature winding and a main field winding are disposed on the rotating portion. A frequency demodulator is configured to extract a frequency modulated control signal from the exciter armature winding and to demodulate the frequency modulated control signal to generate a demodulated control signal. The generator includes a main field rotating power converter to selectively control current in the main field winding in response to the demodulated command signal. The generator system includes a generator control unit in electrical communication with the generator to monitor the output voltage at the main armature winding and to output an exciter current including the frequency modulated control signal to the exciter field winding based on the output voltage. Full Article
rt DC motor assembly with soft starting capability By www.freepatentsonline.com Published On :: Tue, 10 Mar 2015 08:00:00 EDT A DC motor assembly (10) with soft starting capability is provided. The assembly (10) comprises a DC motor (12) including an armature (14) and a field winding (16) adapted to be excited separately from the armature; and circuitry configured to controllably increase current flow through the field winding of the DC motor as a function of time during starting of the DC motor. Full Article
rt Method and arrangement for operating a wind turbine converter By www.freepatentsonline.com Published On :: Tue, 07 Apr 2015 08:00:00 EDT A method of operating a converter of a wind turbine for providing electric energy to a utility grid includes determining a grid voltage. If the grid voltage is between a nominal voltage and a first voltage threshold, i.e. higher than the nominal voltage, a normal procedure for lowering the grid voltage is performed. If the grid voltage is above the first voltage threshold, another procedure for keeping the wind turbine connected is performed, wherein the other procedure is different from the normal procedure. Further a corresponding arrangement is described. Full Article
rt Current balance control in converter for doubly fed induction generator wind turbine system By www.freepatentsonline.com Published On :: Tue, 12 May 2015 08:00:00 EDT Systems and methods for reducing current imbalance between parallel bridge circuits used in a power converter of a doubly fed induction generator (DFIG) system are provided. A control system can monitor the bridge current of each of the bridge circuits coupled in parallel and generate a feedback signal indicative of the difference in bridge current between the parallel bridge circuits. Command signals for controlling the bridge circuits can then be developed based on the feedback signal to reduce current imbalance between the bridge circuits. For instance, the pulse width modulation of switching devices (e.g. IGBTs) used in the bridge circuits can be modified to reduce current imbalance between the parallel bridge circuits. Full Article
rt Double fed induction generator (DFIG) converter and method for improved grid fault ridethrough By www.freepatentsonline.com Published On :: Tue, 26 May 2015 08:00:00 EDT A double fed induction generator (DFIG) converter method are presented in which rotor side current spikes are attenuated using series-connected damping resistance in response to grid fault occurrences or grid fault clearances. Full Article