An aircraft hydraulic control system includes a pump system, a fluid circuit, and a controller. The pump system includes a hydraulic pump and a ram air turbine assembly. The fluid circuit delivers hydraulic fluid to the hydraulic pump and receives the hydraulic fluid output from the hydraulic pump. The controller is in signal communication with the hydraulic pump. The controller determines a rotational frequency of a ram air turbine included in the ram air turbine assembly, and controls the hydraulic pump so as to control the flow of hydraulic fluid in the fluid circuit. The flow of hydraulic fluid in the fluid circuit controls a fluid pressure of the aircraft.

A wind turbine and wave/tidal energy apparatus has a vertical axis blade assembly, a lower cylindrical tube and an upper cylindrical tube. A rotor shaft is connected to the blade assembly and the upper cylindrical tube. A magnetic chamber is housed inside an upper cylindrical frame and is connected with the blade assembly through the rotor shaft. The frictionless levitation chamber is housed inside the upper cylindrical frame. The rotor shaft may protrude through the magnetic chamber into the frictionless levitation chamber and may have a magnet attached on the end of the rotor shaft. The magnetic array chamber is housed inside the lower cylindrical frame and may have a magnetic array axle with plurality of fixed magnets on it. The magnetic array axle may protrude into the frictionless levitation chamber and have a magnet attached to it. The floating inductive coil is located externally of the lower cylindrical frame.

-- A device for generating electric current in a fluid flow circuit, including a duct segment interposed in the fluid flow circuit, a rotor mounted in the duct segment and movable by the passage of a fluid through the device, and a stator or stator circuit cooperating with the rotor and producing electric current. The rotor is made up of a transverse flow turbine, the axis of rotation of which extends across the duct segment, the turbine having at the longitudinal ends of its axis of rotation means for holding against the opposite walls of the duct segment, the stator or stator circuit being positioned outside the duct segment at an end of the turbine which is able to be driven in rotation while the turbine moves, and includes structure for generating a magnetic flux for cooperating with the stator or stator circuit in order to produce the electric current.

Systems and methods for a single-body point absorber buoy with a rigid body housing a multi-stage hollow cylinder, a multi-thread high helix shaft, a low rounds-per-minute permanent magnet alternator/generator, damping/heave plate and cooling and communication tower.

An aircraft hydraulic control system includes a pump system, a fluid circuit, and a controller. The pump system includes a hydraulic pump and a ram air turbine assembly. The fluid circuit delivers hydraulic fluid to the hydraulic pump and receives the hydraulic fluid output from the hydraulic pump. The controller is in signal communication with the hydraulic pump. The controller determines a rotational frequency of a ram air turbine included in the ram air turbine assembly, and controls the hydraulic pump so as to control the flow of hydraulic fluid in the fluid circuit. The flow of hydraulic fluid in the fluid circuit controls a fluid pressure of the aircraft.

This invention describes the electrical power generation in a sustainable way, by means of a device, which is installed in the downpipes of rainwater collected by the building roofs, capable of transforming the potential energy present in said rainwater runoff into electrical power, where the generated energy is stored in batteries or fed into the utility network.

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.

Provided is a method for heating a generator of a wind power installation during or before starting the installation. The generator is a permanent magnet synchronous generator configured to generate a stator current comprising at least one three-phase current. The installation is configured as a gearless installation and is connected to an electrical supply network for feeding electrical power into the network. The installation comprises a converter, connected to the generator, to control the generator to feed electrical power into the network. The method comprises rotating the rotor with a low rotational speed below a first limit and operating the converter such that the generator generates the stator current and electrical power, and no electrical power is fed into the electrical supply network. At least one portion of the stator current substantially circulates through the generator and the converter to consume power in generator windings to heat the generator.

A wave energy conversion device includes a permanent magnet generator, a first driving component and a second driving component. The permanent magnet generator includes a stator structure and a rotor structure. The stator structure includes a stator body. The rotor structure includes a rotor body. The rotor body is disposed inside the stator body in a swinging manner or in a rotatable manner. The first driving component is coupled to the rotor structure. The second driving component is coupled to the stator structure. The wave energy conversion device of the present invention requires a low speed/angle of a swinging/rotating movement of the rotor body relative to the stator body to generate electricity, which facilitates electricity generation from wave energy.

A multi-axial wave energy conversion device includes a main body and a plurality of permanent magnet generating assemblies. Each permanent magnet generating assembly includes at least one permanent magnet generator, an arm and a driving component. The at least one permanent magnet generator includes a stator structure and a rotor structure capable of rotating or swinging relative to the stator structure. The at least one permanent magnet generator is disposed or coupled between the main body and the arm or disposed or coupled between the arm and the driving component, so that the rotor structure is driven to rotate or swing relative to the stator structure when the arm moves relative to the main body or the driving component moves relative to the arm.