摘要:
A direct-drive wind turbine comprises a wind turbine rotor and a generator mounted on a frame. The wind turbine rotor comprises a hub carrying blades and the generator comprises a generator stator comprising a track structure and a stator surface connected to the track structure, wherein the stator surface has coil windings, and carriages connected one after the other and adapted to run on the track structure, wherein the carriages carry an electrically magnetically active material facing the stator surface such that when the carriages run along the track structure a magnetic field is generated across an air gap provided between the carriages active materials and the stator coil windings, wherein one or more carriages are directly coupled to the wind turbine rotor by rigid connectors such that rotation of the wind turbine rotor causes displacement of the carriages along the track.
摘要:
It comprises stator segments forming a stator structure and a transverse structure connected to the stator structure and arranged between at least two stator segments. The transverse structure may have reinforcing ribs extending therealong and a handling device at longitudinally opposite portions of the transverse structure. A wind turbine generator comprising a rotor and said stator assembly and a wind turbine comprising such a generator are also provided.
摘要:
A permanent magnet rotor comprises a rotor body configured for rotating around a central rotational axis and further comprises principal permanent magnets that are substantially rectangular in axial cross-section and are embedded in the rotor body and are arranged inclined with respect to the radial plane extending through the center of the principal magnets and such as to have a circumferential magnetic orientation. The principal magnets have an inner end and an outer end, the outer end being arranged in the proximity of the air gap of the outer circumference of the rotor, and outer bridges of magnetically conductive material being formed between the outer ends of the principal magnets and the outer circumference of the rotor. Auxiliary magnets are arranged near the outer ends of the principal magnets to magnetically saturate the outer bridges.
摘要:
A method is provided for dampening oscillations in a wind turbine, the wind turbine having a tower 1, a rotor 3 arranged on the tower 1 such as to be able to rotate about an X axis, and a plurality of blades 4 with adjustable pitch mounted on the rotor. The method includes monitoring the fore-aft oscillation of the tower 1 in the direction of the X axis, at the 2nd or a higher bending mode frequency; determining a compensating torque to be applied by the rotor 3 to the tower 1 of the wind turbine about a Y axis, which is horizontal and at right angles to the X axis, for at least partly dampening the oscillation at the 2nd or higher bending mode frequency; determining for each rotor blade 4 of the wind turbine an adjustment of the pitch angle suitable to generate the compensating torque about the Y axis; and adjusting the pitch angle β1, β2, β3 of at least one of the individual blades 4 to generate at least part of the compensating torque.
摘要:
The present invention provides a generator comprising winding arrangements, each winding arrangement comprising at least an inner coil and an outer coil constituting a concentric structure of coils. The inner coil is constituted by an inner conductor and the outer coil is constituted by an outer conductor, the inner and outer conductors being connected in series. The inner conductor, which is wound around a tooth, has a smaller electrical resistance per unit length than the outer conductor.
摘要:
It includes at least one platform defining a plane, first and second sets of complementary coupling elements associated with the tower section and the platform respectively, and arranged in levels. In a first relative position of the sets of coupling elements, the platform is allowed to pass, in a substantially horizontal position, through different levels of sets of coupling elements and in a second relative position of the sets of coupling elements, the platform rests with its second set of coupling elements on a first set of coupling elements of one given level. A device for moving the platform may be provided for fitting it inside the tower section. The first or the second set of coupling elements in different levels are aligned along a longitudinal direction inside the tower section.
摘要:
The invention proceeds from a rotating electric machine, in particular a double-fed induction machine in the power range between 20 MVA and 500 MVA, which comprises a rotor that rotates about a machine axis, is concentrically surrounded by a stator, and has a rotor plate body and a shaft, which rotor plate body bears a rotor winding that is arranged further outwards and is connected by means of connectors to slip rings that are arranged further inwards at the end of the shaft. A flexible and secure connection is achieved in that the connectors have mechanical connectors that run at right angles to the shaft to absorb forces arising owing to centrifugal acceleration, which mechanical connectors are connected on one side to a rotor winding head of the rotor winding and are supported on the other side on an auxiliary rim on the rotor plate body.
摘要:
A hoop including a cylinder which, so that the hoop can be mounted around a shaft, is formed by multiple parts that are assembled together using steps that can produce an assembly without deformation of an external surface of the cylinder. A ring, of which an external surface forms the internal surface of a bearing and which, so that it can be secured to the external wall of the cylinder, is formed by multiple elements that are secured to the cylinder by securing devices that can maintain a machining tolerance of the external surface of the ring.
摘要:
The rotor for an electric machine comprises a shaft, a spider on the shaft, a laminated drum on the spider. The spider has a plurality of apart elements defining ducts between each other. The laminated drum has a plurality of cooling channels connected to the ducts. The rotor also has throttle elements associated to at least one duct and/or cooling channel.
摘要:
A winding for a rotating electric machine includes conductive bars having straight parts and end windings and terminal portions of the end windings that are connected together. A protective cap is disposed on at least a portion of each respective connected end winding terminal portion. An electrical insulating material is disposed between each end winding terminal portion and respective protective cap and a seal is inside each protective cap.