Patents by Inventor Mogens A. Christensen
Mogens A. Christensen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230377784Abstract: The present invention relates to a method of producing permanent magnets free of rare-earth metals. Specifically the type of magnets produced by the present invention are rare-earth free magnets based on iron. More specifically, the magnets of the present invention are of the class hexaferrites. The present invention further relates to magnets produced by the method of the invention, which are highly aligned magnets with improved magnetic properties compared to commercially available analogues.Type: ApplicationFiled: October 13, 2021Publication date: November 23, 2023Inventors: Mogens Christensen, Harikrishnan Vijayan Pillai
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Patent number: 10971989Abstract: The invention relates to a wind turbine with a generator and a method of assembling a generator thereof, wherein the generator comprises a rotor rotatably arranged relative to a stator. The rotor comprises a plurality of superconducting pole units arranged on a back iron which is spaced apart from a rotor structure by a number of thermally insulating plates or beams. Said plates or beams are located between either ends of the rotor and orientated relative to the rotational direction of the rotor. Each plate has a first end firmly connected to another first beam extending in an axial direction and a second end firmly connected to another second beam also extending the axial direction. The first beams are further firmly connected to the back iron while the second beams are further firmly connected to the rotor structure. The thermally insulating plates or beams provide a flexible and cheap support interface that is able to adapt to the tolerances of the individual components.Type: GrantFiled: November 22, 2016Date of Patent: April 6, 2021Assignee: Envision Energy (Denmark) ApSInventors: Anders Varming Rebsdorf, Mogens Christensen, Stephane A. Eisen
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Publication number: 20180375419Abstract: The invention relates to a wind turbine with a generator and a method of assembling a generator thereof, wherein the generator comprises a rotor rotatably arranged relative to a stator. The rotor comprises a plurality of superconducting pole units arranged on a back iron which is spaced apart from a rotor structure by a number of thermally insulating plates or beams. Said plates or beams are located between either ends of the rotor and orientated relative to the rotational direction of the rotor. Each plate has a first end firmly connected to another first beam extending in an axial direction and a second end firmly connected to another second beam also extending the axial direction. The first beams are further firmly connected to the back iron while the second beams are further firmly connected to the rotor structure. The thermally insulating plates or beams provide a flexible and cheap support interface that is able to adapt to the tolerances of the individual components.Type: ApplicationFiled: November 22, 2016Publication date: December 27, 2018Applicant: Envision Energy (Denmark) ApSInventors: Anders Varming Rebsdorf, Mogens Christensen, Stephane A. Eisen
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Publication number: 20160167978Abstract: There is presented a method for providing a permanent magnetic material comprising hexagonal ferrites, which method does not necessitate neither large magnetic fields nor organic solvents. The produced permanent magnetic materials have excellent properties, in particular in terms of energy product, such as in terms of energy product and density. In further aspects, the invention relates to particles for providing the permanent magnetic material, and a corresponding method of manufacture. In particular embodiments of the invention the hexagonal ferrite is given by CaFe12O19, SrFe12O19 or BaFe12O19, such as given SrFe12O19 or BaFe12O19.Type: ApplicationFiled: July 4, 2014Publication date: June 16, 2016Inventors: Mogens Christensen, Matilde Saura Muzquiz, Marian Stingaciu
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Patent number: 9046081Abstract: A wind turbine having a wind turbine tower with a nacelle; a wind turbine rotor hub with at least one rotatably mounted wind turbine blade; a shaft coupled to the wind turbine rotor hub and a generator. The generator has a rotor having at least one superconducting rotor coil arranged rotatably relative to a stator having at least one stator coil. The rotor is arranged in a rotor housing and the stator is arranged in a stator housing, the housings being separated by a rotor-stator gap. The stator housing has a stator inner shell and a stator outer shell connected together by at least one stator housing end plate. The stator inner shell has a first inner shell element attached to a stator iron that is connected to a second inner shell element. A pressure plate is attached to the second inner shell element and the stator outer shell.Type: GrantFiled: December 4, 2012Date of Patent: June 2, 2015Assignee: Envision Energy (Denmark) ApSInventors: Anders Varming Rebsdorf, Mogens Christensen
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Patent number: 8847424Abstract: A wind turbine having a wind turbine tower with a nacelle; a wind turbine rotor hub with at least one rotatably mounted wind turbine blade; a shaft coupled to the wind turbine rotor hub and a generator. The generator has a rotor with at least one superconducting rotor coil arranged rotatably relative to a stator having at least one stator coil. The rotor is arranged in a rotor housing and the stator is arranged in a stator housing, the housings being separated by a rotor-stator gap. The stator housing has a stator inner shell and a stator outer shell connected together by at least one stator housing end plate. The stator inner shell has a first inner shell element attached to a stator iron which is connected to a second inner shell element. A pressure plate is attached to the second inner shell element and the stator outer shell.Type: GrantFiled: December 4, 2012Date of Patent: September 30, 2014Assignee: Envision Energy (Denmark) ApSInventors: Anders Varming Rebsdorf, Mogens Christensen
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Publication number: 20140217741Abstract: The invention relates to a wind turbine having a wind turbine tower and a nacelle provided on top of the tower to which a rotor hub with one or more wind turbine blades is rotatably mounted. A cable twisting system is arranged inside the tower and suspended from the bottom of the nacelle. The cable twisting system comprises cable spacing plates coupled to a suspension element. Guiding means guide the electrical cables from the nacelle to the bottom of the tower. The suspension element is a torsion element having a first end capable of twisting relative to a second end when torque is applied to the first end therefore allowing individual cable spacing plates to be rotated in a more uniform manner when the nacelle is yawing. This also allows upwards movement of the cable spacing plates caused by the applied torque to start at the uppermost cable spacing plate.Type: ApplicationFiled: November 27, 2013Publication date: August 7, 2014Applicant: ENVISION ENERGY (DENMARK) APSInventor: Mogens CHRISTENSEN
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Publication number: 20140140881Abstract: The present invention relates to a method 931 for producing a solid element, which comprises the thermoelectrically active material beta-Zn4Sb3. The method utilizes that is possible to directly synthesize and press pellets of Zn4Sb3 starting from powders of Zn and Sb, by mixing 930 powders of Zn and Sb so as to obtain a mixed powder comprising elemental zinc and elemental antimony, placing 932 the mixed powder in a container and simultaneously applying 936 a pulsed current, such as to heat up the powders, and applying 938 a pressure such as to compact the powder mix. The gist of the invention might be seen as exploiting the basic insight, that the cumbersome and time- and energy consuming steps of synthesis and pressing of Zn and Sb, so as to achieve a solid element comprising Zn4Sb3, can be combined into a single step where the synthesis and pressing is effected simultaneously.Type: ApplicationFiled: July 16, 2012Publication date: May 22, 2014Applicant: AARHUS UNIVERSITETInventors: Bo Brummerstedt Iversen, Mogens Christensen, Hao Yin
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Patent number: 8572926Abstract: A method of erecting a wind turbine comprising the following steps: Providing the hub (9), the blades (11), the nacelle (13) and a lattice tower (15) comprising first and second sections (21, 27) pivotally connected along an axis (17) at a height H, in which the tower lower part, below height H, is composed by the second section (27), including the tower lower and upper legs (31, 33) and a first part (23) of the first section (21) and in which the tower upper part, above height H, is composed by a second part (25) of the first section (21). Assembling on ground the wind turbine, with the nacelle (13) resting on a carrier (19). Raising the second section (27) and fixing the upper legs (33) to second foundation corners (43). Raising the first section (21) and fixing its first part (23) to the second section (27).Type: GrantFiled: March 26, 2008Date of Patent: November 5, 2013Assignee: Gamesa Innovation & Technology, S.L.Inventors: Bent Vangsy, Mogens Christensen
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Patent number: 8524106Abstract: A thermoelectric material of the p-type having the stoichiometric formula Zn4Sb3, wherein part of the Zn atoms optionally being substituted by one or more elements selected from the group comprising Sn, Mg, Pb and the transition metals in a total amount of 20 mol % or less in relation to the Zn atoms is provided by a process involving zone-melting of a an arrangement comprising an interphase between a “stoichiometric” material having the desired composition and a “non-stoichiometric” material having a composition deviating from the desired composition. The thermoelectric materials obtained exhibit excellent figure of merits.Type: GrantFiled: July 13, 2011Date of Patent: September 3, 2013Assignees: Aarhus Universitet, Deutsches Zentrum für Luft- und Raumfahrt Advanced TechnologyInventors: Bo Brummerstedt Iversen, Britta Lundtoft, Mogens Christensen, Dieter Platzek
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Publication number: 20130199025Abstract: The present invention relates to a thermoelectric device 100A comprising a layered structure comprising a first layer 106, a first electrical connector 102, a second electrical connector 104, and a second layer 108 being different from the first layer 106, where the first layer comprises a material having the stoichiometric formula Zn4Sb3 (zinc antimonide)and the second layer 108 comprises Zn (zinc). The first layer 106 is being placed between the first and second electrical connector 102, 104, and the second layer 108 is placed between the first layer 106 and the first electrical connector 102. By having a second layer 108 comprising Zn the negative effects of electromigration of Zn may be overcome, since Zn may emanate from the foil and refill Zn depleted regions in the first layer. In a particular embodiment the second layer is a foil. In another particular embodiment, the first layer is doped with an element such as magnesium.Type: ApplicationFiled: October 5, 2011Publication date: August 8, 2013Applicants: PANCO GMBH, AARHUS UNIVERSITETInventors: Dieter Platzek, Bo Brummerstedt Iversen, Mogens Christensen
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Patent number: 8436486Abstract: Wind power turbine comprising a tower (11), a supporting frame (41) and a drive train including a rotor hub (13), a main shaft (21) supported by a front bearing (43) and a rear bearing (45), a generator (31), located at an opposite side to the rotor hub (13) with respect to the tower (11), with a generator shaft (23) rigidly connected to the main shaft (21), and a coupling element (39) between the generator housing (33) and the supporting frame (41) which is placed in a plane substantially coincident with a perpendicular plane (Y-Z) to the main shaft (21) axis (X) in the center of the rear bearing (43) and it is made so that it allows displacements of the generator housing (33) in the direction of the main shaft (21) axis (X) but blocks turning displacements of the generator housing (33) with respect to the main shaft (21) axis (X).Type: GrantFiled: October 27, 2008Date of Patent: May 7, 2013Assignee: Gamesa Innovation & Technology, S.L.Inventor: Mogens Christensen
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Patent number: 8181748Abstract: Lifting device for the assembly of a wind turbine of which the top part of the tower (21) is fixed to the supporting structure (32) located above the upper platform (31) of the lifting device (3). The sections (221) of the lower part (22) of the tower are then installed, in such a way that the lifting device (3) is embedded in the anchoring beams (225) of the lower part (22). 10.In order to lift the upper part (21) of the tower, the upper platform (31) is separated from the lower platform (33) using cylinders (34) between said platforms, the upper platform (31) is fixed to the anchoring beams (225), the lower platform (33) is freed from the anchoring beams (225), the platforms (31, 33) are brought closer together and the lower platform (33) is anchored to said beams (225). Continuing successively until the flanges (211, 222) of the parts (21, 22) of the tower make contact.Type: GrantFiled: March 28, 2007Date of Patent: May 22, 2012Assignee: Gamesa Innovation & Technology, S.L.Inventor: Mogens Christensen
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Publication number: 20110297872Abstract: A thermoelectric material of the p-type having the stoichiometric formula Zn4Sb3, wherein part of the Zn atoms optionally being substituted by one or more elements selected from the group comprising Sn, Mg, Pb and the transition metals in a total amount of 20 mol % or less in relation to the Zn atoms is provided by a process involving zone-melting of a an arrangement comprising an interphase between a “stoichiometric” material having the desired composition and a “non-stoichiometric” material having a composition deviating from the desired composition. The thermoelectric materials obtained exhibit excellent figure of merits.Type: ApplicationFiled: July 13, 2011Publication date: December 8, 2011Applicants: Deutsches Zentrum für Luft- und Raumfahrt Advanced Technology, AARHUS UNIVERSITETInventors: Bo Brummerstedt Iversen, Britta Lundtoft, Mogens Christensen, Dieter Platzek
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Patent number: 8003002Abstract: A thermoelectric material of the p-type having the stoichiometric formula Zn4Sb3, wherein part of the Zn atoms optionally being substituted by one or more elements selected from the group comprising Sn, Mg, Pb and the transition metals in a total amount of 20 mol % or less in relation to the Zn atoms is provided by a process involving zone-melting of a an arrangement comprising an interphase between a “stoichiometric” material having the desired composition and a “non-stoichiometric” material having a composition deviating from the desired composition. The thermoelectric materials obtained exhibit excellent figure of merits.Type: GrantFiled: May 31, 2006Date of Patent: August 23, 2011Assignees: Aarhus Universitet, Deutsches Zentrum für Luft- und Raumfahrt Advanced Technology MarketingInventors: Bo Brummerstedt Iversen, Britta Lundtoft, Mogens Christensen, Dieter Platzek
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Publication number: 20100314882Abstract: Wind power turbine comprising a tower (11), a supporting frame (41) and a drive train including a rotor hub (13), a main shaft (21) supported by a front bearing (43) and a rear bearing (45), a generator (31), located at an opposite side to the rotor hub (13) with respect to the tower (11), with a generator shaft (23) rigidly connected to the main shaft (21), and a coupling element (39) between the generator housing (33) and the supporting frame (41) which is placed in a plane substantially coincident with a perpendicular plane (Y-Z) to the main shaft (21) axis (X) in the center of the rear bearing (43) and it is made so that it allows displacements of the generator housing (33) in the direction of the main shaft (21) axis (X) but blocks turning displacements of the generator housing (33) with respect to the main shaft (21) axis (X).Type: ApplicationFiled: October 27, 2008Publication date: December 16, 2010Inventor: Mogens Christensen
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Patent number: 7793964Abstract: The invention relates to a nacelle that is releasably attachable, the nacelle being adapted for suspension of the nacelle between at least two wheel sets as completely or partly self-supporting suspension.Type: GrantFiled: February 19, 2003Date of Patent: September 14, 2010Assignee: Vestas Wind Systems A/SInventors: Mogens Christensen, Lars Budtz
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Publication number: 20100189531Abstract: Lifting device for the assembly of a wind turbine of which the top part of the tower (21) is fixed to the supporting structure (32) located above the upper platform (31) of the lifting device (3). The sections (221) of the lower part (22) of the tower are then installed, in such a way that the lifting device (3) is embedded in the anchoring beams (225) of the lower part (22). 10.In order to lift the upper part (21) of the tower, the upper platform (31) is separated from the lower platform (33) using cylinders (34) between said platforms, the upper platform (31) is fixed to the anchoring beams (225), the lower platform (33) is freed from the anchoring beams (225), the platforms (31, 33) are brought closer together and the lower platform (33) is anchored to said beams (225). Continuing successively until the flanges (211, 222) of the parts (21, 22) of the tower make contact.Type: ApplicationFiled: March 28, 2007Publication date: July 29, 2010Applicant: GAMESA INNOVATION & TECHNOLOGY, S.L.Inventor: Mogens Christensen
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Publication number: 20100083604Abstract: A method of erecting a wind turbine comprising the following steps: Providing the hub (9), the blades (11), the nacelle (13) and a lattice tower (15) comprising first and second sections (21, 27) pivotally connected along an axis (17) at a height H, in which the tower lower part, below height H, is composed by the second section (27), including the tower lower and upper legs (31, 33) and a first part (23) of the first section (21) and in which the tower upper part, above height H, is composed by a second part (25) of the first section (21). Assembling on ground the wind turbine, with the nacelle (13) resting on a carrier (19). Raising the second section (27) and fixing the upper legs (33) to second foundation corners (43). Raising the first section (21) and fixing its first part (23) to the second section (27).Type: ApplicationFiled: March 26, 2008Publication date: April 8, 2010Inventors: Bent Vangsy, Mogens Christensen
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Patent number: D649936Type: GrantFiled: April 20, 2011Date of Patent: December 6, 2011Assignee: Envision Energy (Denmark) APSInventors: Anders Varming Rebsdorf, Mogens Christensen