Patent application number | Description | Published |
20080276449 | Method for permanent magnet protection - A method for manufacturing of a permanent magnet pole piece comprising at least one magnet which is fixed to a base plate, a protective cover and a filling mass is provided, comprising the steps of fixing of the protective cover to the base plate so that it covers the magnet and so that the protective cover and the base plate are hermetically sealed jointed, evacuating of the interior cavity between the protective cover and the base plate through an opening, injecting of the filling mass through an opening into the interior cavity between the protective cover and the base plate and curing of the filling mass. | 11-13-2008 |
20090021088 | Method for manufacturing of magnet poles - A method for manufacturing sintered magnet poles is described. A vitrifiable base material powder is filled into a mould, the mould is closed with a plate, the mould with the powder is placed in a magnetic field for aligning the powder, the plate is pressed such onto the powder as to establish a compact that holds the alignment in place, and the compact is sintered so as to form a sintered magnet pole. The mould ultimately forms a protective cover of the sintered magnet pole and the plate ultimately forms a base plate of a magnet pole piece. Furthermore, a magnet pole piece is provided which has a magnet pole and a base plate which is fixed to a protective cover so that the base plate and the protective cover surround the magnet pole. The base plate and/or the protective cover of the magnet pole piece has at least one element that provides a geometrical locking of the magnet pole to the base plate and/or the protective cover. | 01-22-2009 |
20110210552 | Asynchronous Power Generator for a Wind Turbine - An asynchronous power generator for a wind turbine is provided. The asynchronous power generator includes a voltage supply and a stator with stator coils supplied with an alternating voltage by the voltage supply. The voltage supply is configured to adjust the voltage supplied to the stator coils based upon an output power generated by the wind turbine. Further, a method of voltage control is provided. | 09-01-2011 |
20110285140 | Generator with single turn wave winding and wind turbine - A generator is provided that includes at least one pole set representing one phase. Each pole set includes a plurality of poles. At least one conductor is turned about the poles of a particular pole set such that only half a single turn is associated to each pole of the particular pole set. | 11-24-2011 |
20110285141 | GENERATOR WITH ALUMINUM WINDING AND WIND TURBINE - A generator is provided that includes at least one conductor. The conductor is made up of aluminium. In a preferred embodiment, the generator includes at least one pole set representing one phase, each pole set having a plurality of poles, and the at least one conductor is turned about the poles of a particular pole set such that only half a single turn is associated to each pole of the particular pole set. | 11-24-2011 |
20110285142 | Generator with Single Turn Wave Winding, Wind Turbine and Method for Determining the Thickness of the Slot Insulation of a Generator - A generator is provided that includes at least one pole set representing one phase. Each pole set includes a plurality of poles and each pole including a plurality of slots. A plurality of conductors are assembled such that each conductor is turned about the poles of a particular pole set in a manner that only half a single turn is associated to each pole of the particular pole set. Each pole is provided with a slot insulation between the pole and the associated conductors. The slot insulation has a different thickness for at least two different poles of the same pole set. | 11-24-2011 |
20120119506 | Method of determining a magnet arrangement - 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. | 05-17-2012 |
20120141317 | Method for manufacturing of magnet poles - A method for manufacturing sintered magnet poles is described. The mould is filled with a vitrifiable base material powder and closed with a plate. A magnetic field aligns the powder and a plate pressed onto the powder establishes a compact that holds the alignment in place. The compact is sintered to form a sintered magnet pole. The mould forms a protective cover of the sintered magnet pole and the plate forms a base plate of a magnet pole piece. Furthermore, a magnet pole piece is provided which has a magnet pole and a base plate which is fixed to a protective cover so that the base plate and the protective cover surround the magnet pole. The base plate and/or the protective cover of the magnet pole piece has at least one element that provides a geometrical locking of the magnet pole to the base plate and/or the protective cover. | 06-07-2012 |
20120205911 | METHOD AND SYSTEM FOR CONTROLLING A DC LINK VOLTAGE OF A POWER CONVERTER CONNECTING AN ELECTRIC GENERATOR OF A WIND TURBINE WITH A POWER GRID - A method is provided for controlling a DC link voltage of a power converter connecting an electric generator of a wind turbine with a power grid. The method includes determining the rotational speed of a rotor of the electric generator. The method further includes determining a strength of harmonic components of the rotational speed of the rotor, wherein the harmonic components have frequency components being different from a fundamental rotational frequency of the electric generator. The method also includes determining a damping reference signal as a function of the determined strength of the harmonic components, and controlling the DC link voltage of the power converter in response to the determined damping reference signal. A corresponding control system is also provided. | 08-16-2012 |
20120217746 | WIND TURBINE - A wind turbine is provided. The wind turbine includes at least one generator adapted to generate electric power and a plurality of electrical converter units adapted to convert electric power generated by the generator and electrically connectable or connected to the generator and to a utility grid. The generator includes a stator being segmented in stator segments. Each stator segment includes a plurality of stator windings. The stator windings of the respective stator segments are divided into at least a first and a second group of stator windings with each group including at least one stator winding. Several or all first groups of stator windings are electrically connected to a first electrical converter unit and several or all second groups of stator windings are electrically connected to a second electrical converter unit. | 08-30-2012 |
20120229239 | Layered magnet - A layered magnet for a magnet arrangement of an electrical machine includes a number of primary magnet layers and a number of subordinate magnet layers, wherein each magnet layer includes a ferromagnet with a layer concentration of a lanthanide, and wherein the layer concentration of the lanthanide is greatest in a primary magnet layer. Further, a method of manufacturing such a layered magnet and an electrical machine with a magnet arrangement are provided. | 09-13-2012 |