A wind harvesting assembly for a wind turbine, having: a Venturi tube having a hollow interior having a first air pressure; an open top end having a first diameter; an open bottom end having the first diameter; a tube length spanning between the open top end and the open bottom end; and a constricted section located above the bottom end, the constricted section adapted to increase a velocity of air passing through by having a second diameter smaller than the first diameter; a plurality of vertical wind turbine blades arranged around the Venturi tube, wherein each vertical blade of the plurality of vertical wind turbine blades is associated with permanent magnets.

A hydroelectric energy system includes a stator including a first plurality of electricity-generating elements. The system also includes a rotor including a second plurality of electricity-generating elements. The rotor is disposed radially outward of an outer circumferential surface of the stator and is configured to rotate around the stator about an axis of rotation. The rotor is a flexible belt structure having a variable thickness and extending along a portion of an axial length of the stator. The system further includes at least one hydrodynamic bearing mechanism configured to support the rotor relative to the stator during rotation of the rotor around the stator. The at least one hydrodynamic bearing mechanism includes a bearing surface made of wood or a composite material.

A wave energy converter is disclosed, comprising: a body configured to float in water and roll and/or pitch in response to wave action; a pendulum supported by the body and configured to swing in response to rolling and/or pitching of the body; an energy converting means associated with the pendulum and configured to convert swinging of the pendulum relative to the body into electrical energy; a pendulum adjusting means configured to adjust a swinging period of the pendulum, wherein the pendulum adjusting means includes one or more flywheels, each of the one or more flywheels being selectively operably connectable to the pendulum; a body tuning means configured to adjustably tune rolling characteristics of the body; and a controller configured to control the body tuning means such that a rolling period of the body approximates or matches a wave energy peak period.

A turbine comprises a shaft (20), a mass (10) eccentrically mounted for rotation about shaft (20), having its center of gravity at a distance from the shaft (20) and a motion base (15). Motion base (15) rigidly supports the shaft (20), and is configured for moving the shaft (20) in any direction of at least two degrees of movement freedom, except for heave. A floating vessel-turbine (120), encloses entirely the eccentrically rotating mass (10) and the motion base (15). The turbine converts ocean wave energy into useful energy, very efficiently.

A kinetic fluid energy conversion system comprises one or more hubs which rotate about a central hub carrier, each including one or more independently controlled articulating energy conversion plates (ECP). An articulation control system rotates each ECP independently of all others to control its orientation with respect to the fluid flow direction between an orientation of 90 perpendicular to the fluid flow, while traveling in the direction of the flow and 0 minimal drag parallel position to the flow, while traveling in the direction against the flow or blocked from it. Each hub can be operably coupled to another hub to form one or more counter-rotating hub and ECP assemblies whereby the mechanical energy is transferred through the hubs, to one or more clutch/gearbox/generator/pump assemblies thereby permitting such assemblies to be land-based when the system is air-powered, and above or near the surface, when the system is water-powered.

When it is not possible for a power generation device to operate coupled to an electric power system, an autonomous operation of connection and disconnection of a load of the power generation device is performed along an efficiency-characteristics curve within a speed range from a rated speed to a maximum speed in the efficiency-characteristics curve of an energy source. During the autonomous operation, an aperture command is outputted to an inlet valve of a water turbine and a first converter is operated in a converter mode when an operation preparation command is outputted by a control unit, a second converter is operated in an inverter mode when a voltage is established by of a DC linkage unit, and the load is connected when the operation preparation is completed.

The disclosure relates to a generator segment of a segmented generator, in particular of a permanently excited segmented rotary generator, of a wind turbine, comprising a rotor segment of a rotor, and a stator segment of a stator, wherein the rotor segment and the stator segment in an operation position are disposed so as to be mutually spaced apart in a radial direction by an air gap, and are disposed so as to be mutually spaced apart in an axial direction by an axial spacing; wherein the rotor segment and the stator segment are able to be disposed and/or displaced relative to one another along a rotation axis by the axial spacing, between an operation position and a transport position that is different from the operation position.

A system and method for harnessing the kinetic energy of the ocean to generate electricity. The system includes a dock made from a buoyant material. The dock has floats at its corners that can receive fixed pillars, such that the floats can move up and down relative to the pillars. Either of the float and the respective pillar has one or more permanent magnets while the other has the conductive coil. The movement of the dock and thus the floats relative to the fixed upstanding pillars results in the generation of electricity.

A hydrokinetic generator including: a submersible housing defining a conduit therethrough for the flow of a fluid; a turbine mounted to the housing comprising at least one impeller located in the conduit for rotation by said flow; and at least one electrical generator coupled to the at least one turbine for converting mechanical energy from the turbine to electrical energy, the electrical generator including a plurality of elongate members bearing one or more magnetic regions, the elongate members being disposed about the at least one impeller and fast therewith; and a number of windings located within material of the housing and arranged for electromagnetic interaction with said magnetic regions whereby in use rotation of the impeller moves the magnetic regions past the windings to thereby induce an electrical current in the windings. The impeller may comprise a plurality of spiral, helical blades disposed about a common axle from a leading end thereof to a trailing end wherein a radius of the blades increases exponentially from the leading end to the trailing end.

The invention relates to a support structure (17) for a laminated core (9) of a stator segment (13) of a dynamoelectric machine having an external rotor, the support structure (17) having two joint plates (6) and two curved pressure plates (1), the respective longitudinal faces of which are in each case mutually opposed, and which encompass a predefinable space and can be connected at their abutting edges. The support structure also has substantially radial bars or ribs (3) between the pressure plates (1) and at least one element having polygonal cut-outs, which element is connected to a longitudinal face of the ribs (3) and forms a base plate of the support structure (17).