An axial flow turbine for generating electricity in low-head environments comprises a runner supported by guide vanes that are curved or contoured to direct flowing water onto fixed turbine blades. The axial flow turbine has a housing that provides an outer draft tube. A second inner draft tube is supported within the outer draft. The axial flow turbine may have a bulb or pit-type housing at the intake chamber for housing a direct-drive variable-speed permanent magnet synchronous generator (PMSG) and power converter system The axial flow turbine may be installed as a single modular unit in low head environments.

A stator of a permanent magnet direct-drive wind power generator includes a stator support, a stator iron core, a blade side tooth pressing plate and a blade side surrounding plate. At least one comb tooth air inlet hole is provided on a side close to the rotor of the blade side surrounding plate, the comb tooth air inlet hole and the second air hole are connected respectively via an air guide pipe. A first spiral comb tooth mechanism is provided on a side, close to the rotor sealing ring, of the blade side surrounding plate, the first spiral comb tooth mechanism is in communication with the comb tooth air inlet hole. The first spiral comb tooth mechanism has first spiral comb teeth protruding into an annular gap formed by the blade side surrounding plate and the rotor sealing ring for generating an airflow with spiral motion.

An inexpensive modular micro wind turbine system is designed for residential as well as commercial and other installations in low-wind and high-wind environments. Simple replaceable components are easy to manufacture, install and sell in small flat packages to facilitate retail distribution (as a single standalone wind turbine module or a cascading series of daisy-chained modules). A substantially enclosed architecture and airfoil design prevents air molecules from easily escaping, providing a number of benefits over existing mast and propeller designsincluding enhanced safety, noise reduction, improved energy efficiency and a self-braking effect that causes the rotational speed of the wind turbine to reach an equilibrium before reaching a maximum survival speed, thereby enhancing safety while avoiding the need for an external braking mechanism. An integrated generator (including conducting coils in each stator in proximity to magnets in each rotor) avoids the need for an external generator.

The invention relates to a turbine and to the implementation method thereof, said turbine comprising a blade mounted such that it can rotate about a central axis and an electromagnetic synchronous machine arranged with the blade in such a way as to modify the angular rotation speed of the blade in order to optimize the mechanical efficiency of the blade as a function of the speed of the incident fluid acting on the blade.

An eduction industrial power system is provided. The system includes one or more vertical-axis wind turbine power plants. Wind is accelerated through a multi-floor eductor of the power plant. Each floor of the eductor is configured with a constricted portion designed to increase the air speed through the eductor, such that low speed winds enter the eductor and much higher speed winds exit it. A plurality of rotor-blade assemblies disposed in the constricted portion of each floor of the multi-floor eductor are mounted to, and rotate, a shared vertical-axis rotor shaft to generate electricity, via a generator. The electricity generated can be stored, used or channeled to an electrical grid, as desired.

A wind turbine system includes a frame including a first arm and a second arm. The wind turbine system includes a wind turbine coupled between the first arm and the second arm. The wind turbine includes a shaft and a plurality of blades coupled to the shaft. The plurality of blades interact with a wind to rotate the shaft. The wind turbine also includes a wind direction device. The wind direction device is configured to block the wind from interacting with one or more of the plurality of blades moving in a movement direction counter to a wind direction of the wind. The wind turbine system includes at least one generator coupled to the wind turbine, wherein the generator is configured to convert mechanical energy of the wind turbine to electrical energy.

The disclosure relates generally to a wave energy harvester, comprising: a housing locatable aboard a floating platform: an armature coil fixedly mounted to the housing, the armature coil having a magnet associated therewith; and a body travelable along a track located within an interior of the housing, the body being coupled to the magnet; wherein, in use, wave-induced periodic motion of the floating platform results in reciprocating travel of the body along the track, with the travel of the body driving movement of the magnet with respect to the armature coil to thereby generate electricity.

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.

Systems and methods for power recovery in carbon capture and storage applications are provided. Such systems and methods include ESP systems including permanent magnet motors (PMM) or induction motors (IM). Systems and methods for power generation including permanent magnet motor electric submersible pumps are also provided.

A wind turbine electrical power generating system includes a first generator configured to be mechanically coupled to a rotor, a second generator configured to be mechanically coupled to the rotor; and an electrical power conversion system including at least a first and a second power converter section. The first power converter section is electrically coupled between a rotor winding of the first generator and a coupling point and a stator winding of the first generator is electrically coupled to the coupling point such that only a fraction of electrical power generated by the first generator passes through the power conversion system. The second power converter section is electrically coupled between an electrical power output of the second generator and the coupling point such that the electrical power provided by the second generator to the coupling point passes through the power conversion system.