Tue, 02 Jun 2015 08:00:00 EDTA battery charge/discharge control device which performs battery charge/discharge control in a working machine with a battery capable of storing electric energy generated by a generator motor coupled to an engine and driving the generator motor or at least one of other electric actuators by the stored electric energy and a controller which controls a distribution of the electric energy among the battery, the generator motor, and the electric actuator, wherein the controller performs the charge/discharge control in which the electric energy of the battery is discharged when the engine is driven and recharging to the battery is permitted on a condition that a state in which an engine speed is equal to or lower than a predetermined engine speed is maintained for a predetermined time after the battery is completely discharged.
Tue, 26 May 2015 08:00:00 EDTA wind turbine apparatus includes a wind turbine, a support column supporting the wind turbine, and a turning base as a base for the support column, the turning base including a turning gear and a turning base shaft. By turning the turning gear 360 degrees or more, only the wind turbine, or the support column and the wind turbine can turn 360 degrees or more about a rotating axis of the turning gear.
Tue, 26 May 2015 08:00:00 EDTA wind turbine having blades that rotate in a horizontal plane about a vertical axis. A single output shaft is directly connected by one-way bearings to the driven shaft of a permanent magnet generator. This eliminates the need for a gearbox and also eliminates the need for inverters. Friction losses are further reduced by suspending the vertical shaft with magnetic bearings. Airfoils are positioned in a specific vertical design so that they cup the wind on a lower concave portion of the airfoil for self-starting capability. Stealth radar-absorbing mesh and faceted mounting structures reduce scrambling of radar returns.
Tue, 26 May 2015 08:00:00 EDTA variable wing venturi generator and a housing for the same are presented. The wings are variable in that their relative position may be changed and optimized to maximize airflow through a turbine and generator contained between the wings. The invention allows for improved efficiency in wind generation. The device accelerates wind speed between a pair of adjustable venturi wings and is especially suited for low wind conditions.
Tue, 26 May 2015 08:00:00 EDTA wind turbine drive train is provided. The wind turbine drive train includes a hub, a bearing system supporting the hub and having an inner race connected to the hub, and a generator gearlessly coupled to the inner race using a flexible coupling member.
Tue, 26 May 2015 08:00:00 EDTA wind turbine includes a nacelle which accommodates at least a generator and power electronics electrically interconnected between the generator and a power grid. At least one power electronic component is removably arranged in the nacelle in a region positioned between a floor level of the nacelle and a lower limiting surface, e.g. a bottom wall, of the nacelle. The space available in the interior parts of the nacelle is thereby utilized to a greater extent than in prior art wind turbines, and replacement of a power electronic component can be performed using ordinary lifting equipment. Furthermore, the risk of injury to maintenance personnel is reduced.
Tue, 26 May 2015 08:00:00 EDTA system for generating electrical power includes one or more turbine systems, a linking system, a power receiving station, and a transmission line. The turbine systems includes a turbine, a turbine carrier that can hold the turbine in a flow of water, and a generator that produces electricity from rotation of a runner of the turbine. The linking system couples the turbine carriers to a fixed location. The transmission line transmits power from the generator to the power receiving station.
Tue, 26 May 2015 08:00:00 EDTA 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.
Tue, 26 May 2015 08:00:00 EDTThe present invention defines a system and method aiming at measuring the direct solar radiation received by a wind turbine generator in order to detect ice formation. The measured value is subsequently compared to a theoretical radiation curve wherein measured values on a cloudy day will be well below theoretical curves. Ice detection is made considering the presence of clouds and temperature. Measured parameters are preferably the direct sun radiation transmittance and ambient temperature.
Tue, 26 May 2015 08:00:00 EDTAn electric generator system includes a rotatable shaft that is configured to rotate about a central longitudinal axis of the shaft, and a pilot permanent magnet generator (PMG) mounted to the shaft such that the pilot PMG is configured to rotate about the central longitudinal axis with the rotatable shaft. The system includes a wound field flux-switching electric machine having a rotor and a stator. The rotor is mounted to the shaft such that the rotor is configured to rotate about the central longitudinal axis with the shaft. The stator includes both a direct current (DC) field coil and an alternating current (AC) armature coil. The DC field coil is operatively connected to the pilot PMG for exciting the DC field coil.
Tue, 26 May 2015 08:00:00 EDTA power generation apparatus includes an operation member that has a first operation part or a second operation part operated upon power generation; a power generation part that generates an induced electromotive force upon being driven by a slide member that moves in a first direction or a second direction; first and second elastic units that accumulate an elastic force; a first connection release mechanism that prompts the first elastic unit to accumulate elastic force when the first operation part is operated and allows the elastic force to be output to move the slide member in the second direction when accumulation is completed; and a second connection release mechanism that prompts the second elastic unit to accumulate the elastic force when the second operation part is operated and allows the elastic force to be output to move the slide member in the first direction when accumulation is completed.
Tue, 26 May 2015 08:00:00 EDTEmbodiments of the subject invention pertain to a method and apparatus for vibrational energy harvesting via electromagnetic induction using a magnet array. Specific embodiments of the subject invention incorporate at least one conductive coil and at least one magnet array. Magnets used in such magnet arrays can be permanent magnets of various shapes, such as arc-shaped, square, rectangular, wedge, or trapezoidal. These magnet arrays can then be, for example, circular, hexagonal, rectangular, or square in external shape and create various types of internal magnetic fields, such as dipole, quadrupole, hexapole, or octapole magnetic fields. Through use of a magnet array, embodiments of the invention can increase the strength of magnetic fields by approximately 10 times compared to typical vibrational energy harvesters. The 10 time increase in the strength of the magnetic fields can result in up to a 100-fold increase in power. Preferably, the magnetic fields created by the subject device are substantially, if not completely, enclosed within the device.
Tue, 26 May 2015 08:00:00 EDTA pipe of an apparatus has a first gas in a first space and a second gas in a second space. The first gas is in the amount to generate a buoyancy force that exceeds at least a gravity force to position the apparatus in a stationary state at a predetermined distance relative to a reference surface. A fixture is coupled to the apparatus to secure the apparatus in the stationary state relative to the ground without supporting the apparatus. The first gas is lighter than the second gas. The pipe is capable of creating a flow of the second gas.
Tue, 26 May 2015 08:00:00 EDTA linear alternator assembly is provided that includes a block defining a cylinder. The cylinder block has inlet ports at which fluid enters the cylinder, exhaust ports at which fluid is exhausted from the cylinder, and a fuel port. Energizable coils surround the cylinder. A first and a second magnetic or magnetizable piston are contained within the cylinder and are positionable within the cylinder in response to energization of selective ones of the coils and combustion of fuel within the cylinder to selectively establish a four-stroke working cycle having an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke, producing at least one of compressed gas and electrical energy. The four-stroke working cycle may be varied to adapt to changes in power demanded, thereby balancing required output power with efficiency considerations.
Tue, 26 May 2015 08:00:00 EDTThe power plant disclosed is an engine that derives its usefulness in the pursuit of energy generation by utilizing hydrostatic pressure differentials found or created in various liquids, gases or solutions, such as but not limited to water and air. It is generally provided as a two-stroke piston cycle power generating system, wherein the actions of the pistons perform work or replenish working fluid from a lower head to a higher head, and can be utilized to generate power, pump fluids, or perform work, for example. Multiple power generating systems are interconnected to provide continuous and constant power generation through a penstock and turbine system.
Tue, 19 May 2015 08:00:00 EDTAn apparatus of a gas turbine for the purpose of converting the pressure and temperature energy of a gas into rotational kinetic energy of a turbine; through an axial injection of such gas into the center of flat disks to perform work as the gas moves outward in one or more spirals cut out of these flat disks; such that the gas experiences a gradual release of pressure along the length of the spirals as the gas presses down on the width and length of the spiral; with the spiral being of many turns such that the radius of the spiral is a prescribed increasing function of turns of the radius; and the spiral has a long length in the order of a meter, a moderate width in the order of a centimeter, and a shallow depth being a small fraction of a millimeter.
Tue, 19 May 2015 08:00:00 EDTA power generation device for a utility vehicle having a battery source, a logic/driver module operably coupled to the battery source and capable of outputting power to a motive drive system, an internal combustion engine capable of outputting a mechanical driving force, and a generator system operably coupled to the internal combustion engine and electrically coupled to the logic/driver module. The generator system is capable of operating as a generator in response to the mechanical driving force of the internal combustion engine, thereby outputting electrical energy to the logic/driver module, and further is capable of operating as an electric motor in response to input of electrical energy from the logic/driver module. Between a first voltage and a second voltage, the output of the generator is reduced. Between the second voltage and a third voltage, the generator output is reduced to zero and the internal combustion engine is reduced to idle.
Tue, 19 May 2015 08:00:00 EDTA method is employed for operating a wind turbine. Electrical energy is produced by means of a generator and is fed into an electrical power network. The electrical energy is fed to the secondary side of a transformer at a low voltage and is output on the primary side of the transformer at a higher voltage. The potential on the primary side of the transformer is undefined. In the method, a measured value of the voltage between the primary side of the transformer and the earth potential is first recorded. The measured value is compared with a predefined limit value. The electrical energy produced by the generator is changed if the measured value exceeds the limit value. A wind turbine is designed to carry out the method. Faults in the medium voltage network can be reacted to without an additional star point on the primary side of the transformer being required.
Tue, 19 May 2015 08:00:00 EDTA controller for optimizing the operation of a turbine to maximize the net present value of the revenue it generates over its lifetime. The controller calculates a plurality of net present values for a plurality of turbine output levels given certain input parameters such as power sale rate, power output level vs. fatigue damage accumulation, etc.; determines a maximum net present value from the plurality of output levels evaluated; and operates the turbine at the output level associated with the maximum net present value.
Tue, 19 May 2015 08:00:00 EDTA constant frequency starter/generator for a turbine engine includes a first inverter/converter, a second inverter/converter, a DC link electrically connecting the first inverter/converter to the second inverter/converter, and an electric machine having a synchronous main machine, wherein the constant frequency starter/generator is operable in a start mode and a run mode.
Tue, 19 May 2015 08:00:00 EDTA linear energy harvesting device that includes a housing and a piston that moves at least partially through the housing when it is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor drives an electric generator that produces electricity. Both the motor and generator are central to the device housing. Exemplary configurations are disclosed such as monotube, twin-tube, tri-tube and rotary based designs that each incorporates an integrated energy harvesting apparatus. By varying the electrical characteristics on an internal generator, the kinematic characteristics of the energy harvesting apparatus can be dynamically altered. In another mode, the apparatus can be used as an actuator to create linear movement. Applications include vehicle suspension systems (to act as the primary damper component), railcar bogie dampers, or industrial applications such as machinery dampers and wave energy harvesters, and electro-hydraulic actuators.
Tue, 19 May 2015 08:00:00 EDTA power generating device includes an input rotor that is provided to an output shaft of speed up gears so as to be capable of rotating together with the output shaft, an output rotor that is provided to a drive shaft of a generator so as to be capable of rotating together with the drive shaft, and a one-way clutch that is disposed between the input rotor and the output rotor. The one-way clutch connects the input rotor with the output rotor so as to rotate together with the input rotor and the output rotor when the rotation speed of the input rotor exceeds the rotation speed of the output rotor, and the one-way clutch is configured to release the connection between the input rotor and the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor.
Tue, 19 May 2015 08:00:00 EDTA system and method for powering an air-drop device is presented. One configuration of the system includes an energy capture device, a generator and an electrical logic unit. The energy capture device converts the movement air passing by the air-drop tail device into kinetic energy. The generator converts that kinetic energy into electrical energy and the electrical logic unit can then be powered by the electrical energy allowing it to perform at least a portion of a mission.
Tue, 19 May 2015 08:00:00 EDTDisclosed herein is a variable blade type tidal and wind power generator with increased generation efficiency. The tidal and wind power generator includes an installation frame (10), a vertical rotating shaft (20), blade installation bars (30) and (30′), support rings (40) and (40′), vertical support rods (50); rotor blades (60) and (60′), vertical support frames (70), horizontal frames (80), an installation member (20′), a support wire (50′), a blade-spreading-degree control means (90), a generation efficiency enhancing means (100) and a generation means (200) which is coupled to the lower end of the vertical rotating shaft to generate power. The tidal and wind power generator can be operated even in conditions of gentle winds or low tides regardless of the direction of the wind or the tidal flow.
Tue, 19 May 2015 08:00:00 EDTAn accessory gearbox for an engine having at least one accessory gearbox shaft connectable to an auxiliary unit and driveable by a drive shaft, the drive shaft being operatively connectable to an engine shaft of the engine. At least one auxiliary unit can be arranged on the drive shaft and/or in the area of the operative connection between the drive shaft and the engine shaft and/or on an accessory gearbox shaft connectable to a further auxiliary unit.
Tue, 12 May 2015 08:00:00 EDTSystems 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.
Tue, 12 May 2015 08:00:00 EDTAn energy harvesting device using auxetic materials includes a first auxetic conductive electrode layer. A second auxetic conductive electrode layer is associated with the first auxetic conductive electrode layer. The auxetic conductive electrode layers have negative Poisson ratios. At least one dielectric elastomer layer is associated in layered orientation between the first and second auxetic conductive electrode layers.
Tue, 12 May 2015 08:00:00 EDTA wind turbine and compressed gas storage system for producing electrical energy. A plurality of wind turbines is serially interconnected for staged compression to output high pressure compressed gas. Each wind turbine includes an upper head portion with two or more propellers, a gear box, a rudder and fin assembly, and a propeller feathering and braking system, all pivotally mounted on a lower storage tank portion. The storage tank portion houses a turbine compressor, and one or more internal tanks. Compressed gas, outputted from one or more of such lines, is directed into a reserve tank, comprising a plurality of concentric, scalloped, ring-like tanks, interconnected by pressure-actuated valves. Each tank is adapted for storing compressed gas at stepped pressures, varying from the highest pressure central tank to the lowest pressure outermost ring tank. Compressed gas from the outer ring tank drives one or more air turbines and respective electrical generators.
Tue, 12 May 2015 08:00:00 EDTThe present application is directed to a tethered airborne wind power generator system including a plurality of pilot buoyant parafoils, at least one power generator parafoil, a nacelle and its twin-blimps, and a train of windsock propellers. The plurality of pilot buoyant parafoils is inter-connected via a composite cable. The power generator parafoil with built-in wind turbines can be suspended beneath the pilot buoyant parafoils via the composite cable. The nacelle is suspended beneath the power generator parafoil via a composite cable. A train of windsock propellers can be coupled to a rear end of the nacelle. The system shall also be applicable on ground by the deployment of an array of trains of windsock propellers hung onto a steel cable grid supported by steel towers to form a wind farm for power generation. The trains of windsock propellers rotating by wind drive their respective outboard generators to generate electrical power.
Tue, 12 May 2015 08:00:00 EDTA wind generator with a wind blade rotating cage for driving multiple generators is disclosed. Sixteen wind blades (8) manufactured by a stretch extrusion process are mounted on the periphery of the wind blade rotating cage (5) suspended by magnetic force. Inner gears (3) are mounted on the inner edge of the wind blade rotating cage (5). Two of an upper and a lower generator cabins (12) are provided on an upright post (1) and eight generators with an electromagnetic clutch are provided inside each generator cabin (12). A gear (2) engaged with the inner gear (3) on the wind blade rotating cage (5) is mounted on a generator shaft (26) extending outside the generator cabin (12). The wind blade (8) is outward convex and inward concave, 1.5 meters wide and 40 meters high. The wind blade (8) has a large wind receiving area and is mounted on the periphery, so the torque produced is large. Inner gears (3) drive the gears (2) of the generator to rotate and the loss of kinetic energy is small. A lightning rod is also provided on the wind generator. The wind generator has a high wind energy utilization ratio, a simple structure and a low operation cost.
Tue, 12 May 2015 08:00:00 EDTThe invention concerns an arrangement for a direct drive generator for a wind turbine, which generator comprises a stator with several stator segments each stator segment having at least one stator element for the power generation and which generator comprises a rotor pivotable around a center axis of the generator and relatively to the stator with several rotor segments each rotor segment having at least one rotor element for the power generation, wherein said arrangement comprises at least one stator segment and at least one rotor segment, and wherein the at least one stator segment and the at least one rotor segment are able to be at least temporarily supported against each other. The invention concerns further a direct drive generator comprising such an arrangement, a wind turbine comprising such a direct drive generator as well as a method for the assembly of the direct drive generator.
Tue, 12 May 2015 08:00:00 EDTA wind farm is provided that is capable of quickly starting up without delay after an electrical grid becomes available after an outage. According to one embodiment, the wind farm comprises one or more main WTGs and an auxiliary WTG having a substantially lower start-up energy requirement than the one or more main WTGs. The auxiliary WTG is coupled to supply power to the one or more main WTGs to prepare the one or more main WTGs for start-up.
Tue, 12 May 2015 08:00:00 EDTThe invention concerns a stationary power plant, in particular a gas power plant, to generate electricity; having an internal combustion engine, comprising a fuel medium inlet and an exhaust gas outlet, whereas an exhaust-gas flow of the internal combustion engine is discharged via the exhaust gas outlet;having an electrical generator, which is driven by the internal combustion engine to generate electricity, and which is coupled or can be coupled to an electrical grid, in order to feed the generated electricity into said grid;having a fuel medium supply, which is connected to the fuel medium inlet; whereina steam circuit, in which a working medium is circulated by means of a feed pump, is provided, comprising a heat exchanger arranged in the exhaust gas flow, by means of which waste heat of the exhaust gas flow is transferred to the working medium for partially or completely evaporating the working medium, further comprising a condenser, in which the working medium partially or completely condenses. The invention is characterized in that a reciprocating piston expander is provided in the steam circuit, in which the working medium expands to produce mechanical work, andthe reciprocating piston expander is connected mechanically to the internal combustion engine and/or the electrical generator by means of a releasable clutch.
Tue, 12 May 2015 08:00:00 EDTAn energy regeneration device of a suspension system for a vehicle includes: a suspension link that connects a wheel carrier to a vehicle body; a bush unit that outputs hinge motion of the suspension link through an output gear; a one-way power transmission mechanism that receives the hinge motion transmitted from the output gear through an input gear, and outputs only one-way rotational power; a generator that is disposed at a side of the vehicle body and generates electricity while being rotated by the transmitted one-way rotational power; a speed-up mechanism that speeds up one-way rotational power transmitted from the one-way power transmission mechanism, and transmits the one-way rotational power to a rotary shaft of the generator; a rectifier that rectifies the electricity generated by the generator; and a battery that accumulates electric energy.
Tue, 05 May 2015 08:00:00 EDTAn improved wind turbine device with energy storage comprises a turbine rotor with rotatable vertical shaft, at least one bearing for said vertical shaft, and multiple rotor vanes disposed symmetrically for rotation about the vertical shaft. Each of said multiple rotor vanes is substantially box-shaped with four solid sides and a front and rear side disposed in a radial vertical plane. The front side to each vane is substantially open faced and the rear side has an opening covered by a plurality of flaps. Each of said flaps is capable of moving with the directional passage of wind through the vane.
Tue, 05 May 2015 08:00:00 EDTA ski or snowboard having an interface power source is provided. The power source uses reverse electrowetting technology to generate a charge to power devices connected to the interface. The power source includes a flexible, non-conductive substrate having a first side and a second side opposite the first side with a channel between the first and second sides. Electrodes are arranged about the channel in a predefined pattern. A liquid is contained in the channel. The liquid includes a dielectric liquid and a conductive liquid that do not mix. The electric change is generated by moving the liquid back and forth across the electrodes. The force to pump or move the liquid is provided by motion of the ski or snowboard.
Tue, 05 May 2015 08:00:00 EDTA tidal energy seawater desalination system wherein a seawater evaporation tower is configured with a vacuum pump which connects with a tidal energy power device, and connects a seawater evaporation tower via pipelines, an output end of the pump connects a steam condensation tower via pipelines; alternatively the evaporation tower comprises a floating barrel and a stationary barrel, the floating barrel connects with the power device, the top of the stationary barrel connecting the steam condensation tower via pipelines; the pipeline introducing the steam into the condensation tower first connects a steam pressure tank, a steam turbine connects the tank via pipelines, the power output shaft of the turbine connects generator sets, and in turn, the turbine connecting the condensation tower via pipelines, such that the system is also a power generation system; on the offshore of which is provided with solar water heater and wind driven generator.
Tue, 05 May 2015 08:00:00 EDTIn one embodiment, a system includes a generator configured to receive a flow of an organic working fluid. The generator includes a stator and a permanent magnet rotor configured to rotate within the stator to generate electricity. The generator further includes one or more components disposed within the generator and configured to be exposed to the flow of the organic working fluid. The one or more components each include an underlying component, and an encapsulant configured to withstand exposure to the organic working fluid to inhibit contact between the underlying component and the organic working fluid.
Tue, 05 May 2015 08:00:00 EDTA rotor having a plurality of wind turbine blades, a generator to be driven by rotation of the rotor, a pitch angle controller for controlling a pitch angle of the wind turbine blades according to a speed of a generator, and a comparing and selecting section are provided. When the voltage of the utility grid is a predetermined value or less, the pitch angle controller controls the pitch angle so that the wind turbine blades do not move to a fine side. Further, the comparing and selecting section compares a temporary pitch angle command value determined based on the speed of the generator with a previous value of a pitch angle command value, and when the temporary pitch angle command value is a command for controlling the wind turbine blades closer to the fine side than the previous value, outputs the previous value as a current pitch angle command value.
Tue, 05 May 2015 08:00:00 EDTAn energy storage and recovery system employs air compressed utilizing power from an operating wind turbine. This compressed air is stored within one or more chambers of a structure supporting the wind turbine above the ground. By functioning as both a physical support and as a vessel for storing compressed air, the relative contribution of the support structure to the overall cost of the energy storage and recovery system may be reduced, thereby improving economic realization for the combined turbine/support apparatus. In certain embodiments, expansion forces of the compressed air stored within the chamber, may be relied upon to augment the physical stability of a support structure, further reducing material costs of the support structure.
Tue, 28 Apr 2015 08:00:00 EDTAn apparatus for selecting operating conditions of a genset, the apparatus including a processor circuit configured to select a set of operating points from a plurality of operating points of the genset each comprising an engine speed in a generator electrical output value and a plurality of cost values associated with operating the genset at respective operating points such that the sum of the cost values associated with the operating points in said set is minimized and such that the engine speed increases or decreases monotonically with monotonically increasing or decreasing electrical power output values.
Tue, 28 Apr 2015 08:00:00 EDTA system and method for providing engine torque load in real time. The system includes a sensor to determine, in real time, a clutch state of an alternator clutch and a controller for determining an alternator torque value and applying the alternator torque value to the engine torque load in real time.
Tue, 28 Apr 2015 08:00:00 EDTA stator arrangement for an electromechanical transducer is provided. The stator arrangement includes a base structure, a coil holder, a coil mounted at the coil holder; and a flexible element connecting the base structure to the coil holder flexibly relative to each other. Further, an electromechanical transducer is provided that includes the above-mentioned stator arrangement and a rotor arrangement rotatable relative to the base structure around an axial direction. Still, further, a wind turbine is provided that includes the above-mentioned electromechanical transducer as a generator.
Tue, 28 Apr 2015 08:00:00 EDTAn impact type wind-driven power generating device is classified into a vertical shaft impact type wind-driven power generating device and a horizontal shaft impact type wind-driven power generating device. The two types of the impact type wind-driven power generating device adopt a power rotor mechanism of a multi-stage impacting blade to utilize the energy of in-coming wind to the maximum extent, thereby improving the utilization of the wind energy. The energy of the in-coming wind is increased due to the height difference and the lateral exhaust of a high-altitude exhaust duct, so that the power rotor can generate electric power at a low load even in a sunny windless day. The power generating device overcomes the disadvantages of low utilization of the wind energy and the power rotor being difficult to be activated.
Tue, 28 Apr 2015 08:00:00 EDTAn annular hood, with a stator assembly mounted and fixed therein, is fixed on the support bar. The stator assembly comprises an annular stator mounting plate which is fixed with an inner stator ring and an outer stator ring distributed concentrically. An annular track is formed between the inner stator ring and the outer stator ring. A rotor assembly and the stator assembly are coaxially and pivotally connected on the support bar, and the rotor assembly is formed of a rotor holder and multiple rotors distributed uniformly on the periphery of the rotor holder at interval. The rotor holder is formed of an outer ring and an inner ring, multiple blade fixing members of a spoke structure are arranged between the outer ring and the inner ring of the holder, and blades are fixed on the blade fixing members. The rotors are protruded and fixed on the outer ring of the holder axially, and a steel magnet of the rotors is located in the annular track between the inner stator ring and the outer stator ring.
Tue, 28 Apr 2015 08:00:00 EDTA wind turbine drive train (1) comprising a gearbox (2), a generator (3) and a coupling (4) located between an output shaft (5) and a rotor shaft (6). The gearbox and the generator are separate components which have their own housings (7, 8). The output and rotor shafts are respectively supported by a shaft bearing arrangement (15) and a generator rotor shaft bearing arrangement (18a, 18b). The generator housing is directly connected to the gearbox housing. The drive train further comprises a gearbox output module (14), which comprises the output shaft, the shaft bearing arrangement and an output shaft bearing housing (16). The gearbox output module at least partly extends into the generator and the gearbox output module at least partly extends beyond a plane (P) defined by the generator. The coupling extends through the rotor shaft and is coupled, on a generator side (G), to the generator rotor shaft.
Tue, 28 Apr 2015 08:00:00 EDTThe present invention relates to a wind-velocity-field measurement system for use in a wind turbine having a rotor with′ two or more blades, comprising at least one sensor-signal obtained by measuring a physical quantity on at angle least one of the blades, the physical quantity being indicative of at least one wind-velocity-field characteristic; a table (140, 142, 144) build for a plurality of wind conditions by associating values characterizing the at least one sensor-signal with values of the at least one wind-velocity-field characteristic, and; searching means (150, 152, 154) for determining from the table a value of the at least one wind-velocity-field characteristic for a current wind condition given values characterizing the at least one sensor-signal.
Tue, 28 Apr 2015 08:00:00 EDTIn one aspect, embodiments of a method of controlling a power rating of a wind turbine are described. One embodiment of the method comprises retrieving, by a computing device, one or more preset values from a memory, wherein the one or more preset values include at least an initial torque setpoint for a wind turbine; determining, by the computing device, an adjusted torque setpoint for the wind turbine based at least in part on one or more operating conditions received from one or more measurement devices associated with the wind turbine; and adjusting a real power output rating of the wind turbine based on the determined adjusted torque setpoint. In one aspect, the computing device can be a controller for the wind turbine.
Tue, 28 Apr 2015 08:00:00 EDTA water current power generating device for generating electric power from water current power includes a sway vibrating body which bends in a response to a fluid force exerted on a circumference surface thereof by a water current, sways in a bending state, and generates tension in a response to a deflection angle from a direction of the water current, and at least one tension power generating unit for converting electro-magnetically or piezoelectrically the tension transferred from the sway vibrating body into the electric power such that a stable electric power can be generated from water current power in a variety of water areas of slow-moving water current to fast-moving water current.
Tue, 28 Apr 2015 08:00:00 EDTThe present invention provides a structure driven by floats placed in a body of water such as a sea, an ocean or the like for converting wave energy into electricity. The structure comprises a floating body to float and stabilize the structure in the water wherein a platform is provided to house and hold energy conversion systems and mechanisms. The mechanisms include a plurality of pontoons that moves with the waves.