Abstract: An installation structure for a hydroelectric power generation apparatus, includes: a power generation apparatus accommodation frame body in which a plurality of hydroelectric power generation apparatuses are accommodated in parallel; a first wire having one end connected to a lower portion of the power generation apparatus accommodation frame body; an anchor or weight connected with the other end of the first wire; a buoyancy body provided on an upper side of the hydroelectric power generation apparatus accommodation frame body through the second wire, the hydroelectric power generation apparatus accommodation frame body having an upper side opened, and having a dividing plate between both side plates to form a plurality of power generation apparatus accommodation units, each of the plurality of power generation apparatus accommodation units having a running water inlet side window formed at a front portion, and having a running water outlet side window formed at a rear portion.

Abstract: A wind turbine structure, including: a hollow cylindrical main body having an upper part and a lower part, a generator part surrounded by the main body. The generator part including: a hollow cylindrical wind turbine rotor body having an exterior surface and, a stator body surrounding the wind turbine rotor body and having an inner surface and an exterior surface, a bearing surrounding the exterior surface of the wind turbine rotor body at an impeller head end and rotatably coupling between the exterior surface of the wind turbine rotor body and the inner surface of the stator body, and wherein the stator body is secured only at the impeller head end to the lower part of the main body, whereas the exterior surface of the stator body is separated by an air gap from the upper part of the main body.

Abstract: This invention involves a hydroelectric turbine system that is capable of producing electricity while sustaining a majority of the fluid flow or hydraulic pressure within the pipe line or pipe network driving the system. The system's objective is to shave as little pressure as possible from an enclosed pipe system that requires pressure to operate and function properly. More particularly, this invention relates to a hydroelectric turbine generator system wherein the system is specially designed and configured with an unique impeller and fluted turbine housing that enable a generator device to produce a particular amount of electric current and voltage, while yet minimizing flow restriction and pressure loss to the fluid pressure driving the system.

Abstract: A system for directly and instantaneously controlling the exciter of a generator. A voltage error calculator calculates a voltage error of output voltage of the generator which is regulated by an instruction voltage and a time constant. A switching signal generator generates switching signals in response to the voltage error. An exciter controller controls the exciter in response to the switching signals. Thus, the system can induce the maximum response characteristic of a power converter only by setting the time constant of a controller without a complicated design for determining gains of the controller. Further, the system can considerably inhibit overshoot from occurring in a transient response state.

Abstract: A device for generating electric energy (1) from a renewable source, in particular from wave energy, comprising an oscillating device (2) that can transform the thrust of a natural agent on the first extremity of oscillating device (2) into kinetic energy; a motor unit, operatively connected to a second extremity of the oscillating device in such a way as to receive the kinetic energy transmitted by the oscillating device (2); and an electrical rotating machine operatively connected to the motor unit and suitable for producing electricity when it is set to rotating by the said motor unit.

Abstract: A vehicle includes a mobile electric power generation system including a mobile power source such as a generator. An external power interface is included to connect to an external electrical power source. An AC electric power distribution bus is included to power electric loads of the vehicle and a power switch device is provided to selectively provide AC electric power on the power distribution bus from one of the respective power sources with a default to select one of the sources whenever it is present.

Abstract: The invention is directed to a high efficiency cogeneration system capable of creating electricity and usable heat. The invention includes a fuel source, which can be a reservoir filled with a fossil fuel. The fuel source feeds a modified combustion engine that can turn a shaft to power an alternator to create electricity. The combustion engine creates hot gases that are treated by a catalytic converter. The byproduct and hot gases are then fed into one or more cooling manifolds.

Abstract: A generator system that includes a six-phase AC machine and an active rectifier bridge employing low on-resistance switches, such as MOSFET switches, for converting the AC current from the machine to a DC current. The system also includes a switch control circuit to switch the MOSFET switches in synchronization with the six-phase current flow. The system determines the phase-to-ground voltages of the machine for inputs to the switch control circuit. The control circuit calculates the phase-to-phase voltages from the phase-to-ground voltages. The control circuit uses a specific control scheme to determine if each of the phase-to-phase voltages is above or below first and second predetermined threshold voltages, where if the phase-to-phase voltage is above the first threshold voltage, the control circuit closes the switch, and if the phase-to-phase voltage is below the second threshold voltage, the control circuit opens the switch.

Abstract: The vehicle-use power generation control apparatus includes a first section to control an excitation current of a vehicle generator driven by a vehicle engine such that a power generation voltage of the vehicle generator is kept at a first set value, a second section to perform gradual excitation control in order to gradually increase the excitation current, a third section configured to inhibit the gradual excitation control when the power generation voltage falls below a second set value lower than the first set value while the gradual excitation control is performed, a fourth section to detect a rotational speed of the vehicle engine or the vehicle generator, a fifth section to determine a limit value of the excitation current based on the detected rotational speed, and a sixth section configured to limit the excitation current below the limit value when the power generation voltage falls below the second set value.

Abstract: A wind power generator has a nacelle; a hub rotatable about an axis of rotation with respect to the nacelle; at least two blades fitted to the hub; an electric machine which is fitted to the nacelle, is bounded by an inner surface extending about the axis of rotation, and has a rotor and a stator; and a cooling system for airflow cooling the electric machine, and which has a deflector body for defining a gap between the deflector body and the electric machine and guiding the airflow into the gap.

Abstract: A circuit includes a first half bridge including a first controllable semiconductor switch and a first diode. The first controllable semiconductor switch is coupled between a first constant supply potential and a center tap of the first half bridge. The first diode is coupled between the center tap and a constant reference potential. A second half bridge includes a second diode and a second controllable semiconductor switch. The second diode is coupled between a second constant potential higher than the first potential and a center tap of the second half bridge. The second controllable semiconductor switch is coupled between the center tap and the constant reference potential. Driver circuitry controls the conducting state of the first and the second semiconductor switch thus controlling the current flow through a field connectable between the center taps.

Abstract: Provided herein is a wind energy installation including a generator for production of electrical energy, a rotor which drives the generator and has variable pitch rotor blades and a central control device, and individual pitch devices provided individually for the rotor blades. The individual pitch devices may include an adjustment drive, a communication link to the central control device and a regulator, the rotor blades being adjustable in order to slow down the wind energy installation to a shut-down position. The individual pitch devices may also include a disturbance situation detector which is designed to identify abnormal operating states and to move the rotor blades to a shut-down position. Also provided herein is the method of operating such a wind energy installation.

Abstract: A power generation system that includes a prime mover configured to generate mechanical energy. The power generation system also includes a power generator configured for generating electrical power from the mechanical energy received from the prime mover. The power generation system further includes a fault ride-through switch electrically coupled in series between the power generator and a power grid. The fault ride-through switch includes a first branch configured to carry the electrical power during normal operating conditions and includes an LC resonance circuit. The fault ride-through switch also includes a multiphase transformer configured for providing voltage phases of different polarities to the LC resonance circuit.

Abstract: The present invention relates to a wind turbine facility comprising a power generator operationally connected to an AC/AC converter adapted to receive variable frequency AC-power from the power generator, and adapted to generate substantially fixed frequency AC-power. The wind turbine facility further comprises a harmonic filter system, and a grid transformer comprising a primary winding being operationally connected to the AC/AC converter, and a secondary winding adapted to be operationally connected to an associated, substantially fixed frequency AC-power supply grid. The grid transformer further comprises a tertiary winding being operationally connected to the harmonic filter in order to suppress unwanted harmonics, such as selected harmonics generated by the AC/AC converter. The turn ratio between the primary and tertiary windings is selected in such a manner that a voltage of the tertiary winding is lower than a nominal voltage level of the associated AC-power supply grid voltage.

Abstract: Device and methods associated with underwater pumped-hydro energy storage are disclosed. An underwater pumped-hydro energy storage device includes a submersible tank that includes an inlet and an outlet. A pump is disposed at the outlet of the submersible tank to evacuate water from the submersible tank in a surrounding body of water. A valve is disposed at the inlet of the at least one submersible tank to control a flow of the water into the submersible tank from the surrounding body of water. Moreover, a turbine power unit is to generate output electrical power from the flow water into the submersible tank.

Abstract: Power generation plant for obtaining electrical power from a water or air flow includes a turbine; an electrical generator, having a coaxial configuration of a rotor and a stator. The rotor is an external rotor and part of an annular support structure for the turbine. The stator is housed in a stator housing which is sealed to the ambient medium and a wall area of the sealed stator housing running in the area of the gap between rotor and stator so that the rotor is situated radially outside the sealed stator housing and the magnetic interaction between rotor and stator occurs through this wall area. A mount for the annular support structure includes the rotor. The mount is situated adjoining the gap between the rotor and stator and is supported on the external circumference of the sealed stator housing.

Abstract: A solar wind chime includes a chime and a striker suspended from a body. A solar energy system is carried by the body and includes a solar energy collection system configured to recharge a rechargeable electrical power source. An electrical subsystem conductively couples to the rechargeable electrical power source.

Abstract: A control circuit for use with an AC alternator has a plurality of outlet lines leading from the alternator, each receiving a phase of current generated by the alternator. Tap lines are associated with each of the power lines and are associated with a switch. The switches drain power to a drain when in a first state, and allow the power to pass downstream to a system load when in a second state. A switch control changes the switches between the first and second state. A detector detects when the current signal is approaching a zero crossing between a cycle positive portion and a negative portion. The switch control takes in the information with regard to the approaching zero crossing, and change the switches between the first and second states based upon the detected zero crossing point. An alternator is also disclosed.

Abstract: An apparatus and method for extracting power from a moving fluid, such as the wind. In an illustrative embodiment, the invention is a vertical axis wind turbine with variable-pitch wings, each turned directly by a servomotor under the control of an on-board computer. The computer is continuously updated from onboard transducers which measure wind direction, wind speed, rotor assembly position and rotor assembly speed and calculates each wing's optimum angle of attack at all times and under all conditions. This angle is then sent as a command to each wing's servomotor and the computer executes the control loop again.

Abstract: A wind turbine having a rotor with a vertically oriented driven shaft for powering a generator and wherein the driven shaft in mounted between upper and lower bearings, and supporting rings perpendicularly attached in spaced relationship to the driven shaft, and a plurality of arcuate beams fitted with the rings and supporting turbine blades which are spaced inwardly of wind directing baffles that surround the rotor blades.