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WO/2011/131803A1 |
The invention relates to a three-phase alternating current generator which is provided with an exciter assembly solidly connected to two independent energy assemblies and which is intended for turbines, such as wind or water turbines, wh...
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WO/2011/126961A2 |
A speed setting system that generates a speed control command for controlling the rotational speed of a stall-controlled wind turbine of a wind-powered machine. The speed setting system generates the speed command as a function of perfor...
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WO/2011/121049A1 |
A torsional mode damping controller system is connected to a converter or placed inside the converter. The converter is driving a drive train including an electrical machine and a non-electrical machine. The controller system includes a ...
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WO/2011/071415A9 |
The invention relates to wind power. The wind power machine with a counter-pressure screen comprises a reactive, radial, limited-pressure turbine situated in front of a counter-pressure screen. The turbine is in the form of a hub and twe...
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WO/2011/117431A1 |
The invention relates to a method for operating a power converter connected to the rotor of a doubly-fed generator that comprises: at least one rotor converter; at least one additional impedance connected in parallel between the rotor an...
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WO/2011/119042A2 |
A variable electrical generator (20) is operable to convert mechanical motion to electrical power. The generator (20) includes at least a stator element (60) and a rotor element (50) including coils (320) and magnets (90). The generator ...
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WO/2011/114752A1 |
The disclosed device (1) for predicting the amount of electricity that will be generated is provided with: a storage unit (20) for storing past data, which includes information about a plurality of time points for each day, as past data ...
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WO/2011/101970A1 |
Disclosed is a maintenance operation method for a wind power generator which effectively utilises phase advancing capacitors provided therein while contributing to the improvement of the power factor on the system side, and said wind pow...
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WO/2011/096404A1 |
Disclosed is a charging device provided with a diode, a switch, a high-voltage conversion circuit, and a controller. The controller determines whether or not the electrical storage capacity of a low-voltage battery exceeds a threshold. I...
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WO/2011/097023A1 |
A fluid turbine for generating electrical power, the turbine having a rotor assembly (20) comprising a hub (21 ), a rim (22) and a plurality of blade members (10) joining them together, the blade members (10) being rigid, flat panel, mul...
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WO/2011/097022A1 |
A wind turbine (10) for generating electrical power, the turbine (10) having a rotor assembly (11) comprising a hub (12), a rim (13) and a plurality of blade members (14) extending between the hub (12) and rim (13), and at least two anem...
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WO/2011/094414A2 |
A variable speed compression system that is driven by a variable frequency high speed motor that receives power from a high frequency generation unit that is driven by a high speed gas turbine is provided. The speed of the turbine may be...
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WO/2011/091864A1 |
The invention describes a method for maximum power point tracking approximation and speed control of a wind turbine using an AC-DC converter consisting of "passive" components only. The proposed system only uses passive electrical compon...
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WO/2011/092733A1 |
A control device for a variable-speed pump-up power-generation device that conducts a start-up of a pumping-up with an AC-exciter synchronous machine put in synchronous-characteristic operation mode, and after that, switches and proceeds...
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WO/2011/088483A1 |
The invention relates to a method for operating a stationary power plant, wherein a fuel/air mixture is burned in an internal combustion engine (1) and wherein the internal combustion engine (1) drives an alternating current generator (2...
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WO/2011/089786A1 |
The disclosed vehicle control device, which varies the power generation voltage of an alternator (12) so that the state of charge (SOC) of an in-built vehicle battery (20) is at a control target, comprises an idle stop permitting SOC set...
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WO/2011/088028A1 |
A monitoring interface device ("MID") is disclosed for a monitoring system for monitoring renewable energy systems. The MID comprises a processor, a memory, wherein the memory is configured with instructions which, when executed, cause t...
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WO/2011/088040A2 |
A generator set includes an internal combustion engine and a generator driven by the engine. The generator provides electricity to a plurality of loads, each of which is selectively connected to the generator by a switch. The generator s...
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WO/2011/086513A1 |
A control device for a separately excited rotor winding (LR) of a synchronous machine is described, which comprises a voltage source (2) connected to the rotor winding (LR) and intended for transmitting electrical energy (E) from a power...
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WO/2011/087732A1 |
A turbine is described. The turbine includes: (i) a shaft capable of rotation along its longitudinal axis and capable of connecting to an electrical generator, and the shaft having disposed thereon at least one shaft hinge; (ii) a radial...
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WO/2011/087067A1 |
Disclosed is a variable-speed power generation device that ensures a speed-variability range for a wound-rotor induction generator while supplying reactive power in response to reactive-power supply commands from a power system. The disc...
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WO/2011/083576A1 |
A current detection device for an inductive load, which comprises an inductive load (100), a switching element (101) that is connected in series with the inductive load and can be turned on or off so as to control a current running throu...
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WO/2011/083369A1 |
Methods for operating a hybrid gas-turbine electric vehicle are disclosed, which in some embodiments include suspending the supplying of fuel to the gas-turbine combustor during gas-turbine operation. Also disclosed are controllers suita...
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WO/2011/080180A2 |
The invention relates to a method for limiting the current output of an electric machine which operates as a generator and which comprises an excitation winding, by means of a control device. The excitation current flowing through the ex...
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WO/2011/079082A1 |
A power generation system is disclosed. According to one embodiment, the power generation system comprises a road plate assembly, a rocker arm coupled to the road plate assembly. The rocker arm undergoes a swinging motion by a downward m...
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WO/2011/069801A1 |
An electrical machine (30) comprises a stator (32) including a plurality of electrical phases (34A, 34B, 34C) and a rotor (42) having a plurality of magnets (44). Each electrical phase (34A, 34B, 34C) comprises at least one coil (36) and...
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WO/2011/070520A2 |
A method of protecting a synchronous machine (10) connected to an electricity network (12) against pole-slip comprises the steps of continuously monitoring a power transfer angle (δ) between an electromotive force (EMF) of the machine a...
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WO/2011/065498A1 |
Disclosed is a control system (10) provided with: a generation apparatus (220) for generating control information that is information based on demand and supply of power generated at a power plant (210), and that is to be used for contro...
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WO/2011/066166A1 |
A wind driven turbine includes a perimeter rim that carries a rotor, and a stator is positioned at the annular path of the rotor with field coils positioned on opposite sides of the rotor that generate electricity in response to the rota...
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WO/2011/061853A1 |
Provided is an improved vehicle AC generator control device capable of, when a target voltage value is changed from a high target voltage value to a low target voltage value by an external control unit, reducing the undershoot of a batte...
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WO/2011/061200A1 |
The invention relates to a method for reducing load-rejecting overvoltages when operating a synchronous rectifier (29) for a multiphase alternating current having a number of inputs (60.1 to 60.5) corresponding to the number of alternati...
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WO/2011/061601A2 |
A power system is provided for delivering a custom level of electrical power to an industrial or commercial facility, comprising a local generator connected to a turbine operating in accordance with an organic Rankine cycle, the local ge...
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WO/2011/059706A2 |
A wind turbine (8) for controlling power oscillations on a grid of a power system (28). The wind turbine (8) comprises rotor blades (12) for turning by the wind, an electric generator (20) rotatably coupled to the rotor blades (12), a po...
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WO/2011/058259A2 |
The machine of the invention is capable of functioning as a generator and outputs a continuous output voltage (Ub+) that is adjustable by an excitation current. The digital regulator (2) of the machine comprises an excitation current con...
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WO/2011/055175A1 |
A control system (50, 100) for wind power plants, the wind plants comprising aerogenerators (10) provided with DC modular converters (40); the control system (50, 100) comprises means for receiving at least a voltage signal coming from a...
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WO/2011/055449A1 |
Provided is a vehicle generated voltage control device, in which even when a monitoring/detection circuit fails to operate, reliability during the failure period is enhanced with respect to controlling the excitation current flowing thro...
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WO/2011/051598A2 |
A turbine engine starter/generator includes a main electrical machine (20), having a stator and a rotor (22) having a wound rotor inductor and shock-absorbing bars forming a housing, and an exciter (30), having a stator inductor and a ro...
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WO/2011/036669A9 |
A system and device for providing AC signal. The system includes: an AC generator that outputs an AC output signal and includes an AC rotor that communicates with a shaft that is rotated at a rotation speed; a speed sensor for sensing th...
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WO/2011/047089A1 |
Systems and methods for monitoring wind turbine operation are disclosed. A method in accordance with one embodiment includes processing sensor data received from at least one strain gauge located on a wind turbine shaft, with a processor...
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WO/2011/045263A1 |
The present invention relates to methods for damping torsional drive train oscillations in a wind turbine facility, said wind turbine facility comprising a power generator and a power converter operatively connected thereto, the power co...
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WO/2011/045564A2 |
An diesel or gas engine-generator unit comprises an internal combustion engine and an alternator, the output of which unit, in use, is adapted to supply electrical power to a site load. The unit is further provided with means to apply a ...
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WO/2011/039006A1 |
The invention relates to a method for protecting a motor vehicle generator from overheating, wherein a specified limiting characteristic curve, relating to a base temperature and describing a maximally allowable exciting current value, i...
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WO/2011/039257A2 |
The invention relates to a method for operating a d.c. generator, especially a starter (10) for an internal combustion engine, the armature (46) of the machine being fed by brushes (42) and a commutator (44) from a constant voltage sourc...
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WO/2011/040845A1 |
An electric motor (100) having a motor control system (400) including: -a current measuring means (402) for directly or indirectly measuring the electric current in the rotor windings (7) providing a rotor current value/s, -an ambient te...
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WO/2010/028689A9 |
The invention relates to a method to control power output of a doubly-fed induction machine to a grid including the steps of measuring grid voltage and grid current in a three phase coordinate system, transforming grid voltage and grid c...
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WO/2011/037164A1 |
A first generator (34) generates power by being rotationally driven by the rotating shaft (33) of a supercharger (3). A second generator (4) generates power and drives an output shaft (25). A first converter (5) converts the alternating-...
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WO/2011/034500A1 |
A method of controlling a wind turbine generator is provided, the wind turbine generator converting mechanical energy to electrical. The method comprises: determining an electromagnetic power reference representing the electromagnetic po...
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WO/2011/034056A1 |
Provided is a wind power generation device that can use a general-purpose inverter. A constant-voltage-mode inverter (30) is used. When a wind-power generator (2) is generating power, switching circuits (40-1 to 40-3) are turned on and o...
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WO/2011/026827A2 |
The invention relates to an excitation device for an electric machine having a superconducting load, in which a current control device is provided in the static part of the electric machine. A transmitter comprising a primary winding is ...
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WO/2011/027056A1 |
The alternator according to the invention includes a stator (s), a rotor (R), synchronous rectification means (20, 21) for rectifying AC voltages (j1, j2, j3) supplied by the stator into DC voltage (B+), and voltage-controlling means (3)...
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