Abstract: An electric power generating system includes a brushless wound field synchronous generator with n-number of power generating channels and n-number of bidirectional switches alternatively controlled to provide ac power at the output. Each power generating channel includes a control rotating transformer, a rotating power converter supplying power to field winding from the rotating power supply, and a center-tap single phase armature winding connected to the bidirectional switches. Rotating power converter modulates current in the field winding to obtain desired frequency and phase at the system output.

Abstract: A compact biomass gasification-based power generation system that converts carbonaceous material into electrical power, including an enclosure that encases: a gasifier including a pyrolysis module coaxially arranged above a reactor module, a generator including an engine and an alternator, and a hopper. The generator system additionally includes a first heat exchanger fluidly connected to an outlet of the reactor module and thermally connected to the drying module, a second heat exchanger fluidly connected to an outlet of the engine and thermally connected to the pyrolysis module, and a third heat exchanger fluidly connected between the outlet of the reactor module and the first heat exchanger, the third heat exchanger thermally connected to an air inlet of the reactor module. The system can additionally include a central wiring conduit electrically connected to the pyrolysis module, reactor module, and engine, and a control panel connected to the conduit that enables single-side operation.

Abstract: A power generation system is provided that includes an internal combustion engine configured to provide rotational mechanical energy. A generator is configured to receive the rotational mechanical energy and generate electrical power in response to the rotational mechanical energy. A fluid medium is provided to the internal combustion engine and to the generator for removing thermal energy from the internal combustion engine and from the generator.

Abstract: A gas turbine engine including high and low pressure shafts, an electromechanical device having a rotor and a stator coupled such that the rotor is rotatable with respect to the stator, the rotor having a device gear secured thereto, the device being secured to a support structure in a bearing housing forming part of a bearing assembly supporting a portion of the low pressure shaft extending in proximity of the high pressure shaft and of the shaft gear, and a coupling idle gear secured for rotation about a stationary gear support mounted in the bearing housing, the idle gear being in toothed engagement with the shaft gear and with the device gear. An electromechanical device assembly for a gas turbine engine and a method of operating an electromechanical device are also provided.

Abstract: A floating platform including a plurality of pontoons providing buoyancy to the platform, and a ballast section imparting a spatial orientation to the platform. The ballast section includes a high density ballast being an aggregation of rocks, an aggregation of chunks of iron ore, or an aggregation of any other high density material. Further, the ballast section is permeable to a fluid medium in which the platform floats so as to cause a high friction between the high density ballast and the fluid medium.

Abstract: A method is provided for controlling a wind turbine connected to a node connected to a utility grid. The node also has a plurality of other wind turbines connected to it. The method includes measuring a quantity indicative of a slope of a voltage at the node in dependence of active power delivered to the node, determining that the slope is smaller than a negative slope limit, and performing a measure, in order to increase the slope above the slope limit.

Abstract: An apparatus of wave generators and a mooring system is used to generate electricity includes a floating hull and an anti-drift mooring system. The floating hull that functions as the floating member is tensionably coupled with a subsurface environment by the anti-drift mooring system, where the anti-drift mooring system can include different embodiments depending on the subsurface environment. Articulated pulley systems of the floating hull allow the anti-drift mooring system to efficiently maximize the power output of wave generator units of the floating hull as the articulated pulley systems and the wave generator units are positioned within the floating hull.

Abstract: A method and system for controlling the output power from a renewable energy installation (10) to a utility grid (56) having a predetermined bound for a variation in output power per unit of time is provided. The method and system includes constraining an output signal of a controller (76) to an upper and/or lower limit via a limiter (78), wherein the upper and/or lower limit comprises a predetermined upper and/or lower bound for a variation in output power per unit of time. The constrained output signal is then applied to the plurality of electricity generators (12, 14, 16) to limit the variation in output power per unit of time according to the predetermined bound.

Abstract: A load bank comprises one or more load resistors connected to an engine-generator and a control system for maintaining a minimum generator load when necessary for optimal operation. The control system operates the load bank to mitigate harmful effects of generator neglect and maintains loading for efficient DPF regeneration while allowing the generator to quickly dump the load bank when real load increases.

Abstract: A dual-generator assembly includes a first generator configured to generate a first current and a second generator configured to generate a second current modulated based on harmonic current in the first current.

Abstract: A turbine assembly, which may be part of a turbine generator assembly, includes a turbine flywheel assembly and a magnet motor within a turbine casing. The turbine flywheel assembly comprises a turbine flywheel rotatably coupled to a shaft, turbine blade assemblies mounted thereon and a magnet motor rotor assembly coupled to the shaft. The magnet motor rotor assembly includes rotor permanent magnets arranged in a ring around the shaft. The same pole of each includes rotor permanent magnet faces outward away from the shaft. A magnet motor stator assembly comprises stator magnet assemblies, each comprising a stator electromagnet and a stator permanent magnet, arranged in a ring around the magnet motor rotor assembly to exert replusive force on the nearest rotor permanent magnet. Selectably controllable nozzles inject compressed air onto the turbine blades. Electromagnet controller(s) individually and selectably activate, deactivate and polarity-switch the stator electromagnets.

Abstract: Wind turbines and methods for controlling wind turbine loading are provided. In one embodiment, a method includes the steps of determining a current wind speed. The method further includes determining a tip speed ratio and a pitch angle that maximize a power coefficient under at least one of the following conditions: a thrust value is less than or equal to a pre-established maximum thrust, a generator speed value is less than or equal to a pre-established maximum generator speed, or a generator torque is less than or equal to a pre-established maximum generator torque. The method further includes calculating a desired generator speed value based on the current wind speed and a tip speed ratio. The method further includes calculating a desired generator power value based on the desired generator speed value.

Abstract: The control device including: a power transistor (502) for controlling conduction/non-conduction of a field coil (3) in accordance with an output voltage of an AC generator (1) mounted on a vehicle; an RPM detection section (511) for detecting an RPM of the AC generator (1); a drive duty setting section (510) for determining whether or not the RPM detected by the RPM detection section (511) is equal to or higher than a predetermined threshold, and reducing a conduction ratio of the field coil (3) when determining that the RPM is equal to or higher than the predetermined threshold; and a driver (504) for driving the power transistor (502) based on the conduction ratio. In this manner, the conduction ratio of the field coil (3) is reduced to suppress the drive torque.

Abstract: The present subject matter is directed to systems and methods for improving reliability of dual bridge doubly fed induction generators (DFIGs) by reducing the number of required components in the converters associated with such DFIGs. A converter is constructed using a pair of current conducting bridges wherein one of the current conducting bridges is controlled and the second is not controlled. The uncontrolled bridge may correspond to a pair of diodes while the controlled bridge may correspond to a pair of transistors, in particular, a pair of IGBT transistors.

Abstract: A tubular housing can include at least one fixed helical vane formed onto the inner surfaces of the tubular housing in a spiral and adapted to direct fluid into a spiraled flow and focus fluid onto a fan blade assembly associated with an alternator system and located within the tubular housing before a system exhaust. A generator cone can be mounted near the center and front of the fan blade assembly facing fluid passing through the tubular housing. As fluid passes over the generator cone it experiences compression between the generator cone and housing resulting in increased pressure and velocity of the fluid, thereby increasing rotational speed of the generator blades and generator as the compressed, spiraled fluid passes through the blades and exits the tubular housing. The system can be used for fixed or mobile applications in water, wind and manually induced fluid flow.

Abstract: A method of operating a wind turbine includes providing a wind turbine having a plurality of blades. A respective sensor is attached to each of the blades. First measurements of a structural characteristic of each of the blades are repeatedly taken by use of the sensors. A tolerance band is established for the measurements. Signals indicative of the first measurements are wirelessly transmitted only if the first measurements are outside of the tolerance band. The transmitted signals are received at a controller. An actuator signal is sent from the controller to at least one actuator associated with the blades. The sending is in response to the receiving of the transmitted signals. At least one of the blades is actuated dependent upon the actuator signal. The actuating is performed by the at least one actuator. Second measurements of the structural characteristic of each of the blades are repeatedly taken by use of the sensors after the actuating step.

Abstract: One embodiment of the present invention is a unique method of controlling the output of a synchronous electrical machine. Another embodiment is a unique method of controlling the output of a synchronous electrical machine for powering a load. Still another embodiment is a unique aircraft power generation system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for fluid driven actuation systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.

Abstract: A wind turbine alternator module having an enclosure, turbine and rotor assembly with peripheral magnets and multi-phase stator for the production of energy from air movement. A bi-directional symmetrical vane turbine and rotor assembly is suspended in the enclosure by guide bearings around the periphery to permit operation in all wind conditions. One or more wind turbine alternator modules are combined in a polygonal housing with bottom inlets and attached to a roof vent structure to generate power from wind and/or rising heated air. A low temperature heating circuit is used for protection in cold conditions. One or more wind turbine alternator modules are combined in a manually portable polygonal housing with storage batteries, charging circuit, inverter circuit, power connectors and ancillary convenience apparatuses such as lighting, radio, tv, and emergency locator.

Abstract: In a controller, a voltage controller operates, in an initial excitation mode, to turn selectively on and off a switch to supply an excitation current as an initial excitation current to the field winding, and operates, in a power generation mode, to selectively increase and reduce the excitation current to be supplied to the field winding to regulate an output voltage of the power generator to a target value. A mode-shift determiner determines, while the voltage controller operates in the initial excitation mode, whether to shift an operation mode of the voltage controller from the initial excitation mode to the power generation mode based on: a measured rotation number of a rotor, a threshold rotation number of the rotor, and a preset time period, the time period being equal to or longer than an expected maximum value of cycle of pulsations of rotation of the engine.

Abstract: In a control apparatus for an inverter generator having a first, second and third windings wound around an alternator driven by an engine, and first, second and third inverters adapted to convert alternating current outputted from the first, second and third windings into direct current and invert the converted direct current into single-phase alternating current in a desired frequency so as to supply to the electric load, there is provided with an actuator (stepper motor) to open and close a throttle valve of the engine, and it is configured to detect output powers (effective powers) of the first, second and third inverters, to determine a target engine speed based on the detected output powers, and to control an operation of the actuator so that the engine speed converges at the determined target engine speed.