Abstract: In a system for feeding a DC link and a method for operating the system, a sensor for detecting a current in the DC link or voltage on the DC link is connected to a controller, which activates a second converter, e.g., a DC/DC converter or current controller. A first energy storage device is connected via the second converter to the DC link, and the controller activates a third converter, e.g., a DC/DC converter or current controller. A second energy storage device is connected via the third converter to the DC link, and the first and the second energy storage devices are different, e.g., have a different dynamic behavior and/or different discharge time constants.

Abstract: In a system for feeding a DC link and a method for operating the system, a sensor for detecting a current in the DC link or voltage on the DC link is connected to a controller, which activates a second converter, e.g., a DC/DC converter or current controller. A first energy storage device is connected via the second converter to the DC link, and the controller activates a third converter, e.g., a DC/DC converter or current controller. A second energy storage device is connected via the third converter to the DC link, and the first and the second energy storage devices are different, e.g., have a different dynamic behavior and/or different discharge time constants.

Abstract: An apparatus and method for producing a rotor blade spar cap for a rotor blade of a wind turbine. The apparatus includes a mold, which has a cavity-like depression in cross section, in which material for a rotor blade spar cap can be placed, and a sheet-like mold covering for sealing off the depression. The depression has side walls, an opening bounded by the side walls and a base area between the side walls. In accordance with the method, fiber material and/or fiber-reinforced material is placed in the depression of the mold such that the material finishes flush with the side walls with respect to the height of the rotor blade spar cap, the depression is sealed off by the sheet-like mold covering, the material is fused together to form the rotor blade spar cap and the rotor blade spar cap is removed from the mold.

Abstract: A method and manufacturing unit for producing a rotor blade (5) of a wind turbine (1) from at least a first rotor blade element (11, 11?, 12, 12?) and a second rotor blade element (11, 11?, 12, 12?). The first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?) are positioned in the desired relative arrangement with respect to each other such that a joint gap (13) remains between the first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?). Adhesive is introduced into the joint gap (13) for joining the first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?).

Abstract: The invention relates to a system and to a method for producing a rotor-blade spar cap with pultruded rods made of a fiber-reinforced material. According to the invention, the system includes at least one retaining apparatus for rotatably mounting at least one rod-layer roll with a rolled-up layer of pultruded rods arranged one beside the other, and a laminating mold for receiving layers of pultruded rods. The system further includes at least one guiding apparatus and additionally at least one trimming apparatus. The guiding apparatus is designed to guide onto the laminating mold a layer of pultruded rods which has been unrolled from a rod-layer roll. And, the trimming apparatus, for trimming the layers of pultruded rods, has a sawing apparatus and/or a milling apparatus.

Abstract: The invention relates to a device (10) for manufacturing a fiber composite component (3, 4, 5), which is connected to an attachment element (22), for a rotor blade (2) of a wind turbine (1), wherein the fiber composite component (3, 4, 5) is or will be manufactured from at least one fiber material (15, 21) and at least one matrix material, wherein the attachment element (22) is provided with a first region (221) arranged outside of the fiber composite component (3, 4, 5) and a second region (222) integrated into the fiber composite component (3, 4, 5), comprising a manufacturing mold (11) for the fiber composite component (3, 4, 5) with a recess (12), wherein the recess (12) has a first region (121) for receiving the first region (221) of the attachment element (22), and a retention device (13), by means of which fluid matrix material is or will be retained from the first region (121) of the recess (12).

Abstract: A fastening element (12) for arrangement in a receptacle of a rotor blade connection (17) of a rotor blade (5). The receptacle is formed on the rotor hub-side end of the, preferably flange-free, rotor blade (5). The fastening element (12) is arranged in the receptacle between an inner fastening side and an outer fastening side of the rotor blade (5) and the fastening element (12) introduced into the receptacle (10) is connected to the inner fastening side and the outer fastening side of the rotor blade (5). The fastening element (12) is formed tapered in the longitudinal extension thereof. The fastening element (12) has a connector (15) transverse, particularly perpendicular, to the longitudinal extension for a lightning protection conductor (18) of the rotor blade (5).

Abstract: An apparatus and method for producing a rotor blade spar cap for a rotor blade of a wind turbine. The apparatus includes a mold, which has a cavity-like depression in cross section, in which material for a rotor blade spar cap can be placed, and a sheet-like mold covering for sealing off the depression. The depression has side walls, an opening bounded by the side walls and a base area between the side walls. In accordance with the method, fiber material and/or fiber-reinforced material is placed in the depression of the mold such that the material finishes flush with the side walls with respect to the height of the rotor blade spar cap, the depression is sealed off by the sheet-like mold covering, the material is fused together to form the rotor blade spar cap and the rotor blade spar cap is removed from the mold.

Abstract: The invention relates to a system and to a method for producing a rotor-blade spar cap with pultruded rods made of a fiber-reinforced material. According to the invention, the system includes at least one retaining apparatus for rotatably mounting at least one rod-layer roll with a rolled-up layer of pultruded rods arranged one beside the other, and a laminating mold for receiving layers of pultruded rods. The system further includes at least one guiding apparatus and additionally at least one trimming apparatus. The guiding apparatus is designed to guide onto the laminating mold a layer of pultruded rods which has been unrolled from a rod-layer roll. And, the trimming apparatus, for trimming the layers of pultruded rods, has a sawing apparatus and/or a milling apparatus.

Abstract: The invention relates to a device (10) for manufacturing a fiber composite component (3, 4, 5), which is connected to an attachment element (22), for a rotor blade (2) of a wind turbine (1), wherein the fiber composite component (3, 4, 5) is or will be manufactured from at least one fiber material (15, 21) and at least one matrix material, wherein the attachment element (22) is provided with a first region (221) arranged outside of the fiber composite component (3, 4, 5) and a second region (222) integrated into the fiber composite component (3, 4, 5), comprising a manufacturing mold (11) for the fiber composite component (3, 4, 5) with a recess (12), wherein the recess (12) has a first region (121) for receiving the first region (221) of the attachment element (22), and a retention device (13), by means of which fluid matrix material is or will be retained from the first region (121) of the recess (12).

Abstract: A method for the production of a rotor blade (1) for a wind power plant, wherein the produced rotor blade (1) in its longitudinal extension, which extends from a rotor blade root (2) essentially to a rotor blade tip (3), has at least one area, in which the rotor blade has an aerodynamic blade section (4, 4?, 4?), which has a leading edge (5) and a trailing edge (6), which are connected via a suction side (7) and a pressure side (8) of the blade section (4, 4?, 4?), wherein at least a first and at least a second molded part (11, 12) manufactured in the longitudinal direction of the rotor blade (1) are provided for a suction side (7) and a pressure side (8) of the rotor blade (1), which are to be connected with each other in the areas of the leading edge (5) and the trailing edge (6). A corresponding rotor blade (1) for a wind power plant and a wind power plant with a corresponding rotor blade (1).

Abstract: A method and manufacturing unit for producing a rotor blade (5) of a wind turbine (1) from at least a first rotor blade element (11, 11?, 12, 12?) and a second rotor blade element (11, 11?, 12, 12?). The first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?) are positioned in the desired relative arrangement with respect to each other such that a joint gap (13) remains between the first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?). Adhesive is introduced into the joint gap (13) for joining the first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?).

Abstract: A method, a device (20), an arrangement and a use for applying a reference mark on a rotor blade (1) for a wind power plant. After producing the rotor blade (1) in a manufacturing mold (34, 34?, 35) and before removing the rotor blade (1) from the manufacturing mold (34, 34?, 35), a reference mark is applied in the area of a rotor blade root (5) of the rotor blade (1) by means of a marking device (23), which is connected or can be connected to a holding device (21) disposed at a predetermined or predeterminable position on the manufacturing mold (34, 34?, 35).

Abstract: A fastening element (12) for arrangement in a receptacle of a rotor blade connection (17) of a rotor blade (5). The receptacle is formed on the rotor hub-side end of the, preferably flange-free, rotor blade (5). The fastening element (12) is arranged in the receptacle between an inner fastening side and an outer fastening side of the rotor blade (5) and the fastening element (12) introduced into the receptacle (10) is connected to the inner fastening side and the outer fastening side of the rotor blade (5). The fastening element (12) is formed tapered in the longitudinal extension thereof. The fastening element (12) has a connector (15) transverse, particularly perpendicular, to the longitudinal extension for a lightning protection conductor (18) of the rotor blade (5).

Abstract: A method, a device (20), an arrangement and a use for applying a reference mark on a rotor blade (1) for a wind power plant. After producing the rotor blade (1) in a manufacturing mold (34, 34?, 35) and before removing the rotor blade (1) from the manufacturing mold (34, 34?, 35), a reference mark is applied in the area of a rotor blade root (5) of the rotor blade (1) by means of a marking device (23), which is connected or can be connected to a holding device (21) disposed at a predetermined or predeterminable position on the manufacturing mold (34, 34?, 35).

Abstract: The invention relates to a method for the production of a rotor blade (1) for a wind power plant, wherein the produced rotor blade (1) in its longitudinal extension, which extends from a rotor blade root (2) essentially to a rotor blade tip (3), has at least one area, in which the rotor blade has an aerodynamic blade section (4, 4?, 4?), which has a leading edge (5) and a trailing edge (6), which are connected via a suction side (7) and a pressure side (8) of the blade section (4, 4?, 4?), wherein at least a first and at least a second molded part (11, 12) manufactured in the longitudinal direction of the rotor blade (1) are provided for a suction side (7) and a pressure side (8) of the rotor blade (1), which are to be connected with each other in the areas of the leading edge (5) and the trailing edge (6). The invention also relates to a corresponding rotor blade (1) for a wind power plant and a wind power plant with a corresponding rotor blade (1).