Patents by Inventor Srikanth Narasimalu

Srikanth Narasimalu 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).

  • Publication number: 20240204628
    Abstract: A computer-implemented method of determining a value of a reliability parameter of an electrical machine, the method includes: estimating an operating temperature of at least a part of the electrical machine based on a measure of a current drawn or supplied by the electrical machine; and determining the value of the reliability parameter based on the estimated operating temperature.
    Type: Application
    Filed: December 18, 2023
    Publication date: June 20, 2024
    Applicant: ROLLS-ROYCE plc
    Inventors: Rajaram SATHYANARAYAN, Sivakumar NADARAJAN, Viswanathan VAIYAPURI, Srikanth NARASIMALU, Amit K. GUPTA
  • Patent number: 10851265
    Abstract: Polymeric compositions useful in preventing the frost or ice deposition in the surface of wind turbine generator blades present in a cold climates or high altitude are provided. In addition to the anti-icing capacity, the polymeric composition prevents the deposition of dirt, i.e. it has self-cleaning properties.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: December 1, 2020
    Assignees: NANYANG TECHNOLOGICAL UNIVERSITY
    Inventors: Zhong Chen, Jose Luis González Moral, Weng Chye Jeffrey Ho, Pushkar Dilip Kanhere, Rosario Martinéz Ortigosa, Srikanth Narasimalu, Xinghua Wu
  • Publication number: 20190233675
    Abstract: Polymeric compositions useful in preventing the frost or ice deposition in the surface of wind turbine generator blades present in a cold climates or high altitude are provided. In addition to the anti-icing capacity, the polymeric composition prevents the deposition of dirt, i.e. it has self-cleaning properties.
    Type: Application
    Filed: October 18, 2016
    Publication date: August 1, 2019
    Inventors: ZHONG CHEN, JOSE LUIS GONZÁLEZ MORAL, WENG CHYE JEFFREY HO, PUSHKAR DILIP KANHERE, ROSARIO MARTINÉZ ORTIGOSA, SRIKANTH NARASIMALU, XINGHUA WU
  • Patent number: 10355366
    Abstract: The invention provides a composite laminate comprising an outer, an intermediate and an inner section comprising, respectively, first layers of composite material and one or more functional layers having a printed circuit for absorbing the electromagnetic radiation incident on the composite laminate; second layers of composite material; a conducting layer contiguous to the intermediate section and third layers of composite material. The values of the resistivity of the functional layer and the thickness of the intermediate section are comprised in predefined ranges for the attenuation of the reflection of electromagnetic radiation of the composite laminate in the S or X bands up to a peak of ?20 dB. The invention also refers to manufacturing methods of the composite laminate (11) and to wind turbine blades including the composite laminate.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: July 16, 2019
    Assignees: NANYANG TECHNOLOGICAL UNIVERSITY, SIEMENS GAMESA RENEWABLE ENERGY INNOVATION & TECHNOLOGY, S.L.
    Inventors: Pushkar Dilip Kanhere, Weng Chye Jeffrey Ho, Xinghua Wu, Eng Kee Chua, Srikanth Narasimalu, Kye Yak See, Zhong Chen, Jose Luis González Moral, Rosario Martínez Ortigosa
  • Patent number: 10283873
    Abstract: The invention provides a composite laminate comprising an outer, an intermediate and an inner section comprising, respectively, first layers of composite material and one or more functional layers having a printed circuit for absorbing the electromagnetic radiation incident on the composite laminate; second layers of composite material; a conducting layer contiguous to the intermediate section and third layers of composite material. The values of the resistivity of the functional layer and the thickness of the intermediate section are comprised in predefined ranges for the attenuation of the reflection of electromagnetic radiation of the composite laminate in the S or X bands up to a peak of ?20 dB. The invention also refers to manufacturing methods of the composite laminate (11) and to wind turbine blades including the composite laminate.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: May 7, 2019
    Assignees: NANYANG TECHNOLOGY UNIVERSITY, GAMESA INNOVATION & TECHNOLOGY, S.L.
    Inventors: Pushkar Dilip Kanhere, Weng Chye Jeffrey Ho, Xinghua Wu, Eng Kee Chua, Srikanth Narasimalu, Kye Yak See, Zhong Chen, Jose Luis González Moral, Rosario Martínez Ortigosa
  • Publication number: 20170162947
    Abstract: The invention provides a composite laminate comprising an outer, an intermediate and an inner section comprising, respectively, first layers of composite material and one or more functional layers having a printed circuit for absorbing the electromagnetic radiation incident on the composite laminate; second layers of composite material; a conducting layer contiguous to the intermediate section and third layers of composite material. The values of the resistivity of the functional layer and the thickness of the intermediate section are comprised in predefined ranges for the attenuation of the reflection of electromagnetic radiation of the composite laminate in the S or X bands up to a peak of ?20 dB. The invention also refers to manufacturing methods of the composite laminate (11) and to wind turbine blades including the composite laminate.
    Type: Application
    Filed: October 24, 2014
    Publication date: June 8, 2017
    Applicants: NANYANG TECHNOLOGICAL UNIVERSITY, GAMESA INNOVATION & TECHNOLOGY, S.L.
    Inventors: Pushkar Dilip KANHERE, Weng Chye Jeffrey HO, Xinghua WU, Eng Kee CHUA, Srikanth NARASIMALU, Kye Yak SEE, Zhong CHEN, Jose Luis GONZÁLEZ MORAL, Rosario MARTÍNEZ ORTIGOSA
  • Patent number: 9074582
    Abstract: The present invention relates to a wind turbine nacelle having a top face with a longitudinal extension in a wind direction. The nacelle comprises a cooling device having a cooling area and extending from the first face of the nacelle, and a cover having at least one inner face and at least a front edge facing the wind direction. The cooling device is enclosed by the first face of the nacelle and the inner face of the cover and is arranged in a front distance of at least 440 mm from the front edge of the cover.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: July 7, 2015
    Assignee: Vestas Wind Systems A/S
    Inventors: Krishnamoorthi Sivalingam, Anand Bahuguni, Ravi Kandasamy, Srikanth Narasimalu, John K. Grevsen, Jesper Nyvad, Paul T. Tietze
  • Patent number: 9039368
    Abstract: The present invention relates to a wind turbine nacelle having a first face with a longitudinal extension in a wind direction, comprising a cooling device having a cooling area and extending from the first face of the nacelle, and a cover having at least one inner face, the cooling device being enclosed by the first face of the nacelle and the inner face of the cover. A first distance between at least one of the faces and the cooling area is at least 30 mm.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: May 26, 2015
    Assignee: Vestas Wind Systems A/S
    Inventors: Krishnamoorthi Sivalingam, Anand Bahuguni, Ravi Kandasamy, Srikanth Narasimalu, John K. Grevsen, Jesper Nyvad, Paul T. Tietze
  • Patent number: 9039369
    Abstract: The present invention relates to a wind turbine nacelle having a top face with a longitudinal extension in a wind direction, comprising a cooling device extending from the top face of the nacelle and a cover having at least one inner face. The cooling device is enclosed by the top face of the nacelle and the inner face of the cover.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: May 26, 2015
    Assignee: Vestas Wind Systems A/S
    Inventors: Krishnamoorthi Sivalingam, Anand Bahuguni, Ravi Kandasamy, Srikanth Narasimalu, John K. Grevsen, Jesper Nyvad, Paul T. Tietze
  • Patent number: 8951011
    Abstract: According to the inventive concept, there is provided a wind turbine with at least one blade. The wind turbine comprises a first accelerometer mounted at a first radial position of the blade and being adapted to determine a first acceleration value, and a second accelerometer mounted at a second radial position of the blade different from the first radial position, and the accelerometer being adapted to determine a second acceleration value. The wind turbine further comprises a controller adapted to generate a signal based on said first and second acceleration values. There is also provided a method for monitoring a blade of a wind turbine.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: February 10, 2015
    Assignee: Vestas Wind Systems A/S
    Inventors: Xiao Qian Li, Ingemann Hvas Sandvad, Srikanth Narasimalu
  • Patent number: 8876473
    Abstract: A hinged connection apparatus is described for securing a first wind turbine component to a second. The first wind turbine component may be a wind turbine blade (10) and the second wind turbine component may be a control surface such as an aileron (11). The first or second wind turbine component comprises at least one hinge housing in which a hinge pin (16, 26) is retained. The hinge pin (16, 26) may be extended from a retracted position into an extended position in which it engages with a hinge recess on the other wind turbine component to form a connection. A locking mechanism is provided for securing the hinge pin in place. The hinge pin may be extended manually or automatically by an actuator.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: November 4, 2014
    Assignee: Vestas Wind Systems A/S
    Inventors: Carsten Hein Westergaard, Mark Hancock, Srikanth Narasimalu
  • Patent number: 8829700
    Abstract: A heat exchanger assembly for cooling a heat-generating component, such as a generator or power electronics module, within a wind turbine nacelle comprises a thermoelectric element, such as a Peltier element, having a first section arranged in a first region of relatively high temperature in contact with the heat-generating component or in the vicinity thereof, and a second section arranged in a second region of a relatively low temperature. The thermoelectric element is configured to transfer heat from the first region of relatively high temperature to the second region of relatively low temperature with consumption of electrical energy. A source of electrical energy is provided for the thermoelectric element, and a control unit may be provided for controlling the energy supply in order to control the temperature of the component or surface area cooled by the thermoelectric element. A further cooling element including a so-called heat pipe may be provided to enhance cooling efficiency.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: September 9, 2014
    Assignee: Vestas Wind Systems A/S
    Inventors: Voon Hon Wong, Ravi Kandasamy, Srikanth Narasimalu, Gerner Larsen, Tusitha Abeyasekera, Peter C. Knudsen
  • Publication number: 20130040151
    Abstract: The present invention relates to methods for joining and for improving interfacial strength of joints in objects of fibre-containing composite materials, such as epoxy/glass fibre composite materials of a wind turbine blade, as well as fibre reinforced composite materials, laminates and other interconnected objects prepared by this method. In particular wind turbine blades prepared by this method are described. The present invention further relates to robots and robotic tools for carrying out the described methods for joining objects of fibre-containing composite materials.
    Type: Application
    Filed: December 16, 2010
    Publication date: February 14, 2013
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Premkumar Jeromerajan, Srikanth Narasimalu, Erwin Merijn Wouterson, Wojciech Stanislaw Gutowski, Sheng Li, Weidong Yang
  • Publication number: 20120269645
    Abstract: The invention provides a wind turbine component having an exposed surface made of a hydrophobic material and having a surface texture providing a Water Contact Angle (CA) of at least 150. Due to the combination between a CA over 150 and the hydrophobic material, the component becomes less vulnerable to ice formation etc. The invention further provides a method of preventing ice formation, a method of reducing noise and a blade for reducing noise from a wind turbine.
    Type: Application
    Filed: August 19, 2010
    Publication date: October 25, 2012
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Srikanth Narasimalu, Premkumar Jeromerajan
  • Publication number: 20120235421
    Abstract: A heat exchanger assembly for cooling a heat-generating component, such as a generator or power electronics module, within a wind turbine nacelle comprises a thermoelectric element, such as a Peltier element, having a first section arranged in a first region of relatively high temperature in contact with the heat-generating component or in the vicinity thereof, and a second section arranged in a second region of a relatively low temperature. The thermoelectric element is configured to transfer heat from the first region of relatively high temperature to the second region of relatively low temperature with consumption of electrical energy. A source of electrical energy is provided for the thermoelectric element, and a control unit may be provided for controlling the energy supply in order to control the temperature of the component or surface area cooled by the thermoelectric element. A further cooling element including a so-called heat pipe may be provided to enhance cooling efficiency.
    Type: Application
    Filed: December 1, 2010
    Publication date: September 20, 2012
    Applicant: Vestas Wind Systems A/S
    Inventors: Voon Hon Wong, Ravi Kandasamy, Srikanth Narasimalu, Gerner Larsen, Tusitha Abeyasekera, Peter C. Knudsen
  • Patent number: 8186936
    Abstract: A rotor blade for a wind turbine comprises a rotor blade body with a root for connecting the rotor blade to a hub of a wind turbine, a tip, a leading edge and a trailing edge. The blade has a movable part, and motion transmitting means for connecting to an actuator being placed preferably outside the blade body, and transmitting motion from the actuator to the movable part. The motion transmitting means is electrically non-conductive, whereby the risk of lightning stroke accidents is reduced.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: May 29, 2012
    Assignee: Vestas Wind Systems A/S
    Inventor: Srikanth Narasimalu
  • Publication number: 20120093651
    Abstract: A hinged connection apparatus is described for securing a first wind turbine component to a second. The first wind turbine component may be a wind turbine blade and the second wind turbine component may be a control surface such as an aileron. The first or second wind turbine component comprises at least one hinge housing (15) in which an electrically sensitive component, such as a cable or an electrical activated hinge pin, is retained. Preferably, the interior portion of the hinge housing (30) is made of a glass fibre composite material that is fatigue resistant and electrically non-conductive. The exterior (31) of the hinge housing on the other hand is preferably electrically conductive. Furthermore, an extendable conductive or non-conductive sleeve (32) may be provided to bridge the gap in-between one hinge housing and an adjacent hinge housing.
    Type: Application
    Filed: March 17, 2010
    Publication date: April 19, 2012
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Carsten Hein Westergaard, Mark Hancock, Srikanth Narasimalu
  • Publication number: 20120086215
    Abstract: The present invention relates to a wind turbine nacelle having a top face with a longitudinal extension in a wind direction, comprising a cooling device extending from the top face of the nacelle and a cover having at least one inner face. The cooling device is enclosed by the top face of the nacelle and the inner face of the cover.
    Type: Application
    Filed: January 29, 2010
    Publication date: April 12, 2012
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Krishnamoorthi Sivalingam, Anand Bahuguni, Ravi Kandasamy, Srikanth Narasimalu, John K. Grevsen, Jesper Nyvad, Poul T. Tietze
  • Publication number: 20120070283
    Abstract: A hinged connection apparatus is described for securing a first wind turbine component to a second. The first wind turbine component may be a wind turbine blade (10) and the second wind turbine component may be a control surface such as an aileron (11). The first or second wind turbine component comprises at least one hinge housing in which a hinge pin (16, 26) is retained. The hinge pin (16, 26) may be extended from a retracted position into an extended position in which it engages with a hinge recess on the other wind turbine component to form a connection. A locking mechanism is provided for securing the hinge pin in place. The hinge pin may be extended manually or automatically by an actuator.
    Type: Application
    Filed: March 17, 2010
    Publication date: March 22, 2012
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Carsten Hein Westergaard, Mark Hancock, Srikanth Narasimalu
  • Publication number: 20120070284
    Abstract: A hinged connection apparatus is described for securing a first wind turbine blade component to a second. The first wind turbine component may be a wind turbine blade body (10) and the second wind turbine component may be a control surface such as an aileron (11). The first or second wind turbine blade component comprises at least one hinge housing in which a rotary actuator (26) is retained. The rotary actuator (26) may comprise a motor, or in alternative embodiments a material that changes its shape under the influence of an external stimulus, such as a piezo-electric element or a memory alloy. The rotary actuator may be provided as part of the hinge pin connecting the first component to the second.
    Type: Application
    Filed: March 17, 2010
    Publication date: March 22, 2012
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Carsten Hein Westergaard, Mark Hancock, Srikanth Narasimalu