The invention provides a method for computational fluid dynamics and apparatuses making enable an efficient implementation and use of an enhanced jet-effect, either the Coanda-jet-effect, the hydrophobic jet-effect, or the waving-jet-effect, triggered by specifically shaped corpuses and tunnels. The method is based on the approaches of the kinetic theory of matter providing generalized equations of fluid motion and is generalized and translated into terms of electromagnetism. The method is applicable for slow-flowing as well as fast-flowing real compressible-extendable generalized fluids and enables optimal design of convergent-divergent nozzles, providing for the most efficient jet-thrust. The method can be applied to airfoil shape optimization for bodies flying separately and in a multi-stage cascaded sequence. The method enables apparatuses for electricity harvesting from the fluid heat-energy, providing a positive net-efficiency. The method enables generators for practical-expedient power harvesting using constructive interference of waves due to the waving jet-effect.

The present application relates to a generator comprising: a stator, a rotor, in particular having a rotor band, and a heat pipe assembly which is thermally connected to the rotor in order to conduct heat which is generated by the rotor, in particular during operation of the generator.

The present invention relates to a control unit for a converter, preferably of a power converter of a wind power installation, in particular of an active rectifier of a power converter of a wind power installation, comprising: a primary control module for specifying a setpoint value for the converter; a first secondary control module for controlling the converter, in particular a first converter module of the converter, which second secondary control module is configured to produce a first control signal according to the setpoint value; a second secondary control module for controlling the converter, in particular a second converter module of the converter, which converter module is connected in parallel with the first converter module, which second secondary control module is configured to produce a second control signal according to the first control signal.

A power generation device includes a first generator connected to a prime mover, a second generator connected to the prime mover, a first DCDC converter connected to the first generator, and a second DCDC converter connected to the second generator.

Electric machine drive systems, and related electric machine embodiments, include technologies for providing redundancy of shaft information of one or more electric machines between converter controllers of the corresponding system. The converter controllers are configured to control operation of power converters, which control one or more electric machines. The disclosed technologies include establishing one or more communication buses between the converter controllers to share the shaft information, which may be based on analog signals from a single, common resolver and/or from different, redundant resolvers depending on the embodiment. For example, in some embodiments, converter controllers communicatively connected to the same resolver may include separate resolver-to-digital converters (RDCs) to provide redundancy of the RDCs.

An electrical system for a wind turbine having a reduced uptower footprint and method for achieving the same are provided. Accordingly, the electrical system includes a plurality of electrical subsystems having a plurality of electrical subsystem assemblies. At least one electrical subsystem assembly is integrated with the generator housing. Additionally, the electrical subsystem assembly is coupled between the stator or the rotor of the generator and the generator output connection. The electrical system incorporating the electrical subsystem assembly with the generator housing has a reduced uptower footprint relative to a nominal design of an electrical system.

The present application relates to a slot wedge element, a stator device, a motor, and a wind turbine. The slot wedge element extends in a first direction and has opposite first and second edges has a first surface and a second surface in the thickness direction thereof, and is attached to a winding of the stator device via the first surface. The second surface includes a first portion, a second portion, and a third portion sequentially distributed in the first direction. A second thickness between the second portion and the first surface is greater than a first thickness between the first portion and the first surface, and the second thickness is greater than or equal to a third thickness between the third portion and the first surface. The first thickness is decreasingly distributed in a direction from the second portion to the first edge.

Proposed are renewable power generating systems driven by wind or wheel power such as train vehicle power generating systems, which are easily installed on train vehicles of trains, and which generate power without additional carbon emissions to avoid environmental pollution. One or more generator holders to hold one or more generators are installable on a train vehicle chassis. A generator wheel may be configured to touch a rail and may rotate in any direction along the rail. A generator axle may couple one or more generators to the generator wheel. The one or more generators may generate electrical power and produce zero carbon emissions while the generator wheel rotate on the rail. One or more wind turbines may also be coupled to the generator axle to supply power to the one or more generators so that the one or more generators produce zero carbon emissions while the train vehicle is moving.

A vertical axis wind turbine system for generating electricity. The whole turbine and the generator is structured around a single pole in the center. The pole holds the whole system together and supports the entire system. The System includes a turbine and a generator assembly. It consists of multiple folded L-shaped rectangle blades, which are structured around an empty cylinder whose purpose is to force air to go around it and into the blades for better efficiency. The empty cylinder is attached to the pole in the center of the system. The blades are attached to a bearing that spins around the pole on the top end and attached to the rotor on the bottom end of the empty cylinder. Each blade is folded at an angle to reduce the drag of the returning blades without compromising the surface area of the going blades.

A multi-stage wind power extractor includes a tunnel and at least two turbines. The tunnel is circular in a cross-section and has a horizontal axis, first and second open ends, and a length that is greater than a diameter of the tunnel. The tunnel diameter progressively increases from the first open end to the second open end. The turbines are arranged in spaced relation within and coaxial with the tunnel. Each includes a rotor having a plurality of radially extending blades, a controller connected with the rotor, and a motor connected with the controller. The controllers independently engage and disengage their respective rotors in accordance with a wind velocity travelling through the tunnel from the first open end to the second. In turn, when a rotor is engaged, the motor provides power to a generator that is connected therewith.