Abstract: A computer-aided design system provides tolerance analysis of model assemblies. Constraints are applied to a model assembly based on user-selected surfaces. Overlay surfaces are defined at the assembly, where each of the overlay surfaces corresponds to a user-selected surface. One or more stacks are defined based on a user input, where the stacks are a measurement dimension encompassing two or more parts of the assembly. The system simulates 1) variation of the overlay surfaces across a range of variation values within a respective tolerance zone based on the tolerance specifications, and 2) alteration of the stack as a result of the variation. Based on the variation of the overlay surfaces, the system identifies a subset of the user-selected surfaces that, when varied within the respective tolerance zone, alter the stack.

Abstract: A method to control a wind power installation is provided. The wind power installation includes a generator and a converter. The generator is configured to convert wind power into electrical power and to provide the electrical power from the generator to the converter. The converter is configured to adapt and to provide the electrical power to an electrical grid. The converter is operable to comply with pre-determined grid code requirements during a grid fault. An amount of electrical power, which is present in the wind power installation during the grid fault, is fed into the generator. The generator is operable to convert the respective amount of electrical power into a generator loss.

Abstract: A computer-aided design system provides tolerance analysis of model assemblies. Constraints are applied to a model assembly based on user-selected surfaces. Overlay surfaces are defined at the assembly, where each of the overlay surfaces corresponds to a user-selected surface. One or more stacks are defined based on a user input, where the stacks are a measurement dimension encompassing two or more parts of the assembly. The system simulates 1) variation of the overlay surfaces across a range of variation values within a respective tolerance zone based on the tolerance specifications, and 2) alteration of the stack as a result of the variation. Based on the variation of the overlay surfaces, the system identifies a subset of the user-selected surfaces that, when varied within the respective tolerance zone, alter the stack.

Abstract: A method to control a wind power installation is provided. The wind power installation includes a generator and a converter. The generator is configured to convert wind power into electrical power and to provide the electrical power from the generator to the converter. The converter is configured to adapt and to provide the electrical power to an electrical grid. The converter is operable to comply with pre-determined grid code requirements during a grid fault. An amount of electrical power, which is present in the wind power installation during the grid fault, is fed into the generator. The generator is operable to convert the respective amount of electrical power into a generator loss.

Abstract: A computer-aided design (CAD) system provides for designing, modeling and simulating objects in 3D. Both 2D and 3D objects can be provided in a 3D space and associated to one another by one or more constraints. Modification to the objects is calculated to satisfy the constraints as well as the geometric and functional properties of the objects. The objects can then be updated according to the calculated modification, thereby satisfying various requirements of the design.

Abstract: A system and a method of operating the system comprising a media provider comprising a first user interface and a controller comprising a second user interface, the method comprising the user browsing the network using the controller and viewing media information on the controller, such as an iPad. The user may control the controller to stream the media information to a media provider, which may be a TV and so that the media information is then provided on both the TV and iPad in a synchronized manner. Subsequent to that, the TV may receive the media information directly from the network so that the controller may be used for other purposes.

Abstract: A wind turbine yaw system is provided that includes a yaw gear, at least two pinion gears, and at least two drive units, each of which is associated to one of the pinion gears for driving that pinion gear. The yaw system also includes a control system with a controller for generating a drive unit control signal for each drive unit for controlling the respective drive unit according to a reference signal having a desired operational parameter value for the respective drive unit, so as to realize the desired operational parameter value in the respective drive unit. The control system includes a feedback loop for each drive unit feeding a drive unit feedback signal including at least the actual value of one operational parameter of the respective drive unit back to the controller. The controller generates the drive unit control signals based on the reference signal and the feedback signals.

Abstract: A method for arranging magnets of a rotor or stator of an electrical machine is provided. In this method a number of performance parameters of the electrical machine are identified. A plurality of neighboring magnets are assigned to a magnet group. The magnet group includes a reference magnet and at least one further magnet. Further, a number of distinct magnet arrangement variables for the magnet group are identified, such that the number of arrangement variables is equal to the number of performance parameters. A value of an arrangement variable is calculated according to a desired adjustment of a performance parameter. Based on the calculated arrangement variable, an arrangement is determined for one of the at least one further magnet of the magnet group relative to the reference magnet of that magnet group.

Abstract: A method of monitoring quality of a control circuit in a power plant is provided. The quality of the control circuit is continuously assessed by determining characteristic quantities describing the quality by applying a plurality of testing methods suitable for describing dynamic properties of the control circuit to current operating data originating from the instrumentation and control equipment of the power plant, and by evaluating the characteristic quantities.

Abstract: A method for assembling part of a generator is disclosed. A magnet assembly with at least one magnet and a mounting plate is fastened to a base element by welding the mounting plate to the base element.

Abstract: A method for arranging magnets of a rotor or stator of an electrical machine is provided. In this method a number of performance parameters of the electrical machine are identified. A plurality of neighboring magnets are assigned to a magnet group. The magnet group includes a reference magnet and at least one further magnet. Further, a number of distinct magnet arrangement variables for the magnet group are identified, such that the number of arrangement variables is equal to the number of performance parameters. A value of an arrangement variable is calculated according to a desired adjustment of a performance parameter. Based on the calculated arrangement variable, an arrangement is determined for one of the at least one further magnet of the magnet group relative to the reference magnet of that magnet group.

Abstract: A computer-aided design (CAD) system provides for designing, modeling and simulating objects in 3D. Both 2D and 3D objects can be provided in a 3D space and associated to one another by one or more constraints. Modification to the objects is calculated to satisfy the constraints as well as the geometric and functional properties of the objects. The objects can then be updated according to the calculated modification, thereby satisfying various requirements of the design.

Abstract: A wind turbine yaw system is provided that includes a yaw gear, at least two pinion gears, and at least two drive units, each of which is associated to one of the pinion gears for driving that pinion gear. The yaw system also includes a control system with a controller for generating a drive unit control signal for each drive unit for controlling the respective drive unit according to a reference signal having a desired operational parameter value for the respective drive unit, so as to realize the desired operational parameter value in the respective drive unit. The control system includes a feedback loop for each drive unit feeding a drive unit feedback signal including at least the actual value of one operational parameter of the respective drive unit back to the controller. The controller generates the drive unit control signals based on the reference signal and the feedback signals.

Abstract: A method and apparatus for manufacturing a rotor are provided. The rotor is particular a rotor yoke for a wind turbine generator. A hollow rolled metal cylinder is provided and plastically deformed permanently to a predetermined shape and a predetermined size. The apparatus includes a pressing unit and a mould element.

Abstract: An electrical machine is described including two moving elements, of which a first moving element is a stator of the electrical machine and the other moving element is a rotor of the electrical machine. Attached to one of the moving elements is a magnetic element which interacts with a magnetic flux in the electrical machine during operation. Further, a sensor is provided for measuring a vibrational quantity of the electrical machine and a control unit is configured for detecting a displacement of the magnetic element on the basis of the measured vibrational quantity. The electrical machine may be a generator or a motor.

Abstract: A new and distinct cultivar of Campanula plant named ‘CBO 1’, characterized by its upright to spreading plant habit; dense and bushy plant form, mainly due to less upright stems; vigorous growth habit; no need for vernalization for flower induction; shorter cultivation period; and single, violet colored bell-shaped flowers.

Abstract: A computer added design system enables layout of a dependent component based on master components having a set of geometric and functional properties. Based on the state of the dependent component imposed by the assembly, as well as user-entered parameters, modification to the set of properties can be calculated. Based on the calculated modification, the master component and dependent component are updated.

Abstract: A new and distinct Schlumbergera plant named ‘THOR-KIRI’ particularly characterized by large upright to vertical flowers; freely flowering white, light-purple and red-purple colored flowers; large quantity of flowers per plant; and slow growth rate and freely branching growth habit.

Abstract: A new and distinct cultivar of Campanula plant named ‘CBO 1’, characterized by its upright to spreading plant habit; dense and bushy plant form, mainly due to less upright stems; vigorous growth habit; no need for vernalization for flower induction; shorter cultivation period; and single, violet colored bell-shaped flowers.