A generator, in particular a generator of a wind turbine, comprising a rotatably mounted generator rotor, a generator stator which corresponds to the generator rotor and which has a support structure for fixing in the wind turbine, and at least one arresting device which is configured to be coupled in between the generator rotor and the generator stator in such a way that there is a force flow between the generator rotor and the generator stator and which is adapted in the coupled state to arrest the generator rotor in a predetermined position relative to the generator stator. The arresting device has a damping element which is variable in shape such as to deform as a result of the force flow between the generator rotor and the generator stator.

A rotor for a vertical axis wind turbine generator features a flywheel having first and second faces located opposite one another across a thickness of the flywheel, and a circumferential perimeter edge joining the first and second faces together around the central axis at a perimeter of the flywheel. A series of cavities are spaced radially inward from the circumferential perimeter edge and open into the flywheel from the first face on a path disposed circumferentially about the central axis. A series of permanent magnets carried in the cavities have the opposing poles of adjacent magnets facing in the same axial direction. The recessed magnet configuration avoids the separate magnet-retention means required for flush-mount configurations, and increases the performance of the generator.

The present invention relates to a wind turbine tower comprising a tower vibration damper (100) with a tuned mass damper and one or more impact damping units (113, 114, 115, 200, 300, 400). The tuned mass damper comprises a pendulum structure (101, 208), a chamber connecting a friction media (112) to the pendulum structure (101, 208) is at least partly immersed, and a suspension arrangement (103-111) suspending the pendulum structure (101, 208) inside the wind turbine tower such that the pendulum structure (101) is allowed to displace from a neutral position towards the outer boundary (102) of the chamber. The impact damping units (113, 114, 115, 200, 300, 400) are positioned between the pendulum structure (101, 208) and the outer boundary (102), such that the outer boundary (102) of the chamber and the pendulum structure (101, 208) may collide via the impact damping units (113, 114, 115, 200, 300, 400).

A wind and water power generation system is presented. The wind and power generation system has a roof mounted gutter system with an internally integrated turbine. The internally integrated turbine has a connection to an externally positioned wind scope. Thus, the rain run-off causes the internal turbine to rotate to generate power and the external wind scope allows the internal turbine to turn without rain.

A device to stabilize, reduce, or control the wave or wind-induced heave (vertical), surge (lateral), or pitching (rolling) motion of a floating or semi-submerged buoyant base, raft, barge, buoy or other buoyant body such as the buoyant base of a wave energy converter or a floating wind turbine base. The device concurrently allows the floating base to self-orient or weathervane to substantially maintains its orientation with respect to the direction of oncoming waves, winds, or wind gusts. The device also facilitates maintaining the submerged depth or vertical orientation of the buoyant base relative to the still water line to compensate for tidal depth changes. The device utilizes a second substantially submerged buoyant body having a center of buoyancy and at least one tensioned seabed connection located substantially below and forward or up-sea or up-wind of the center of buoyancy of the buoyant base. A structural member, which can optionally also be buoyant or integral with the base or second submerged body, connects the submerged buoyant body with the floating base.

Disclosed is an apparatus that adapts the rate of its computational work to match the availability of energy harvested from a stochastic energy source; and, with respect to some types of energy harvesting, regulates the rate of energy capture, the rate of energy conversion, and the rate of consumption of stored potential energy, through its alteration, regulation, and/or adjustment, of that same computational work load.

A wind park with wind turbines and airborne wind energy systems where a first zone and a second zone is defined for at least one of the airborne wind energy systems such that the risk of collision between apart of that airborne wind energy systems and a part of one of the wind turbines is higher when the airborne unit of that airborne wind energy system is in the second zone than when it is in the first zone, and different control parameters are applied to the control of at least one of the wind turbine and the airborne wind energy system depending on the position of the airborne unit relative to the defined zones.

A transmission includes a first transmission stage, a feedthrough extending through the first transmission stage, and a first deflector designed to deflect a lubricant away from the feedthrough.

A flow regulation system for regulating a flow of a fluid from a fluid reservoir is disclosed having a fluid reservoir container, an effluent conduit adapted to discharge fluid from the fluid reservoir container, and a fluid turbine disposed in the effluent conduit. A generator is operatively connected to the fluid turbine for converting mechanical energy of the fluid turbine to electrical energy, and a power conditioning module is energized by the generator to alter voltage and current characteristics of electricity generated by the generator. A load manager is provided to monitor operational characteristic of the flow regulation systems. The load manager responds to a change in operational characteristics by sending a signal to alter an electrical load characteristic selected from the group comprising a clock frequency of digital computing circuits in the electrical load, a mean rate of digital switching operations of digital computing circuits in the electrical load, and a current draw of the electrical load.

Methods and systems are provided for nautical stationkeeping of free-floating objects. In one example, a method includes adjusting translational motion of a body freely floating in water by rotating the body. The translational motion may be adjusted, for instance, to maintain the body within a geographic area. In certain examples, the adjustment of the translational motion may be realized via a Magnus effect induced by rotating the body. The body may be configured as, for example, a free-floating object such as a wave engine.