Patents by Inventor Michael Klitgaard
Michael Klitgaard 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: 20230084177Abstract: A wind turbine blade includes a profiled contour with a leading edge and a trailing edge, and a chord extending between the leading edge and the trailing edge, along with a blade shell with a pressure side and a suction side, a first main spar cap integrated in the pressure side of the blade shell, a second main spar cap integrated in the suction side of the blade shell, and one or more shear webs connected between the first main spar cap and the second main spar cap. The blade shell includes at least a first load carrying structure arranged at the leading edge or the trailing edge and having a first extension, including a first primary extension on a first side of the chord, where the first primary extension is at least 60% of the first extension.Type: ApplicationFiled: May 27, 2022Publication date: March 16, 2023Applicant: LM WIND POWER US TECHNOLOGY APSInventors: Morten RAVN, Peter HANSEN, Simon BERG BOJESEN, Casper SKOVBY, Mads DØSSING, Peter BÆK, Christian Frank ANDERSEN, Michael KLITGAARD, Mark Olaf SLOT
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Patent number: 10989172Abstract: A method for the determination of the deflection of a wind turbine blade is provided. A distance between at least one root location towards a root end of the wind turbine blade and at least one tip location towards a tip end of the wind turbine blade is measured. A blade deflection profile is then calculated based on the measured distance between the root and tip locations and a known modal profile of the wind turbine blade.Type: GrantFiled: September 10, 2015Date of Patent: April 27, 2021Assignee: LM WP PATENT HOLDING A/SInventors: Peter Bæk, Michael Klitgaard, Claus Byskov
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Publication number: 20190211801Abstract: A wind turbine blade and a method of manufacturing same are disclosed. The wind turbine blade comprises a profiled contour with leading and trailing edges and a chord extending there between, a blade shell with pressure and suction sides, a first main spar cap integrated in the pressure side, a second main spar cap integrated in the suction side, and one or more shear webs connected between the first main spar cap and the second main spar cap, wherein the blade shell comprises at least a first load carrying structure arranged at the leading edge or the trailing edge, wherein the first load carrying structure has a first extension including a first primary extension on a first side of the chord, wherein the first primary extension is at least 60% of the first extension.Type: ApplicationFiled: June 23, 2017Publication date: July 11, 2019Applicant: LM Wind Power US Technology APSInventors: Morten RAVN, Peter HANSEN, Simon BERG BOJESEN, Casper SKOVBY, Mads DØSSING, Peter BÆK, Christian Frank ANDERSEN, Michael KLITGAARD, Mark Olaf SLOT
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Patent number: 10330082Abstract: A system for monitoring the deflection of a wind turbine blade is described. The system comprises a wireless range-measurement system, having at least one wireless communication device located towards the root end of the blade and at least one wireless communication device located towards the tip end of the blade. The root end device is provided on a bracket projecting from the external surface of the blade, to provide a communication path between the root end and tip end devices which is less susceptible to interference from multipath effects, etc. There is further provided a method to derive tilt and yaw moments from measured deflections. A control method for such a system is also described, wherein the signal gain of the communication path may be varied based at least in part upon the deflection characteristics of the wind turbine blade.Type: GrantFiled: August 14, 2013Date of Patent: June 25, 2019Assignee: LM WP PATENT HOLDING A/SInventors: Claus Byskov, Peter Baek, Michael Klitgaard, Casper Skovby, Lars Fuglsang
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Patent number: 10316817Abstract: A manufacturing method is described for a wind turbine blade, where layers of fiber material are laid up in a mold to form a portion of the blade structure. The fiber layers are infused with a resin which is subsequently cured to form the hardened blade structure. Some of the layers of fiber material are arranged so that a portion of the layers are kept resin-free during the infusion and curing steps, so that the fiber layer extends freely out from the external surface of the blade, preferably at the blade trailing edge, to provide a flexible blade trailing edge to reduce blade operational noise.Type: GrantFiled: April 28, 2015Date of Patent: June 11, 2019Assignee: LM WP PATENT HOLDING A/SInventors: Michael Klitgaard, Christian Frank Andersen, Morten Ravn, Casper Skovby, Simon Berg Bojesen, Peter Baek
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Patent number: 9909570Abstract: A system and method for the verification and calibration of wind turbine sensor systems is provided. The system comprises an optical capture device provided on a wind turbine which is arranged to record the position of at least one light source provided at the wind turbine during operation of the wind turbine. The motion of the light source relative to the optical capture device can provide an indication of relative motion of a portion of the wind turbine during operation, which can then be used as an input to a calibration and/or a verification system for a sensor system of the wind turbine.Type: GrantFiled: December 11, 2013Date of Patent: March 6, 2018Assignee: LM WP PATENT HOLDING A/SInventors: Michael Klitgaard, Peter Baek, Claus Byskov
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Patent number: 9909562Abstract: A control method for a wind turbine, in particular for a wind turbine blade is described. The control method makes use of the blade mode shapes, or natural vibration shapes, of the blade to detect the excitement level of the blade natural vibrations, and controls active lift devices on the blade in an effort to reduce the excitement levels, to reduce loading in the blade and the overall wind turbine structure. There is also provided a method of designing a wind turbine blade for use in such a method.Type: GrantFiled: December 5, 2012Date of Patent: March 6, 2018Assignee: LM WP PATENT HOLDING A/SInventors: Peter Baek, Christian Frank Andersen, Mark Olaf Slot, Casper Skovby, Simon Berg Bojesen, Morten Ravn, Michael Klitgaard
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Publication number: 20170260967Abstract: A method for the calculation of a wind turbine blade deflection is described. The method utilises a known blade modal profile in the calculation of the blade deflection, such that the a priori knowledge of the blade excitation modes can be used with a simple distance measurement to determine the blade deflection shape. The calculated blade deflection can then be used as an input to control wind turbine operation, e.g. where it is likely that the deflected blade might result in a tower strike.Type: ApplicationFiled: September 10, 2015Publication date: September 14, 2017Inventors: Peter BÆK, Michael KLITGAARD, Claus BYSKOV
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Publication number: 20170051718Abstract: A manufacturing method is described for a wind turbine blade, where layers of fibre material are laid up in a mould to form a portion of the blade structure. The fibre layers are infused with a resin which is subsequently cured to form the hardened blade structure. Some of the layers of fibre material are arranged so that a portion of the layers are kept resin-free during the infusion and curing steps, so that the fibre layer extends freely out from the external surface of the blade, preferably at the blade trailing edge, to provide a flexible blade trailing edge to reduce blade operational noise.Type: ApplicationFiled: April 28, 2015Publication date: February 23, 2017Inventors: Michael KLITGAARD, Christian Frank ANDERSEN, Morten RAVN, Casper SKOVBY, Simon Berg BOJESEN, Peter BAEK
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Publication number: 20150322925Abstract: A system and method for the verification and calibration of wind turbine sensor systems is provided. The system comprises an optical capture device provided on a wind turbine which is arranged to record the position of at least one light source provided at the wind turbine during operation of the wind turbine. The motion of the light source relative to the optical capture device can provide an indication of relative motion of a portion of the wind turbine during operation, which can then be used as an input to a calibration and/or a verification system for a sensor system of the wind turbine.Type: ApplicationFiled: December 11, 2013Publication date: November 12, 2015Inventors: Michael KLITGAARD, Peter BAEK, Claus BYSKOV
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Publication number: 20150240787Abstract: A system for monitoring the deflection of a wind turbine blade is described. The system comprises a wireless range-measurement system, having at least one wireless communication device located towards the root end of the blade and at least one wireless communication device located towards the tip end of the blade. The root end device is provided on a bracket projecting from the external surface of the blade, to provide a communication path between the root end and tip end devices which is less susceptible to interference from multipath effects, etc. There is further provided a method to derive tilt and yaw moments from measured deflections. A control method for such a system is also described, wherein the signal gain of the communication path may be varied based at least in part upon the deflection characteristics of the wind turbine blade.Type: ApplicationFiled: August 14, 2013Publication date: August 27, 2015Inventors: Claus Byskov, Peter Baek, Michael Klitgaard, Casper Skovby, Lars Fuglsang
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Publication number: 20140334928Abstract: A control method for a wind turbine, in particular for a wind turbine blade is described. The control method makes use of the blade mode shapes, or natural vibration shapes, of the blade to detect the excitement level of the blade natural vibrations, and controls active lift devices on the blade in an effort to reduce the excitement levels, to reduce loading in the blade and the overall wind turbine structure. There is also provided a method of designing a wind turbine blade for use in such a method.Type: ApplicationFiled: December 5, 2012Publication date: November 13, 2014Inventors: Peter Baek, Christian Frank Andersen, Mark Olaf Slot, Casper Skovby, Simon Berg Bojesen, Morten Ravn, Michael Klitgaard