Patents by Inventor Todd Karin

Todd Karin 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: 20210123966
    Abstract: An approach to detecting partial discharge events involves retrofitting an electrical system to include a capacitive sensor configured to capacitively sense partial discharge events of a component of the electrical system. The capacitive sensor has a first electrical conductor that forms a first terminal of the capacitive sensor, a second electrical conductor that forms a second terminal of the capacitive sensor, and a dielectric that separates the first electrical conductor and the second electrical conductor. The capacitive sensor generates an electrical sensor signal at an output of the capacitive sensor in response to the partial discharge event. The electrical sensor signal is converted to an optical signal and the optical signal is processed to detect an occurrence of the partial discharge event.
    Type: Application
    Filed: October 24, 2019
    Publication date: April 29, 2021
    Inventors: Todd Karin, Peter Kiesel, Ajay Raghavan, Robert T. Stinson, IV, Malcolm G. Smith, JR., Jane Shin, Serena Lee, Bradley Kittrell
  • Publication number: 20210123775
    Abstract: A sensor system includes a sensor network comprising at least one optical fiber having one or more optical sensors. At least one of the optical sensors is arranged to sense vibration of an electrical device and to produce a time variation in light output in response to the vibration. A detector generates an electrical time domain signal in response to the time variation in light output. An analyzer acquires a snapshot frequency component signal which comprises one or more time varying signals of frequency components of the time domain signal over a data acquisition time period. The analyzer detects a condition of the electrical device based on the snapshot frequency component signal.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 29, 2021
    Inventors: Peter Kiesel, Ajay Raghavan, Todd Karin, Qiushu Chen
  • Patent number: 10895566
    Abstract: A corrosion monitoring system includes one or more objects coupled to respective portions of a transformer tank. The one or more objects are configured to corrode before the respective portions of the transformer tank. At least one optical sensor is coupled to each of the objects. The at least one optical sensor has an optical output that changes in response to strain of the object. An analyzer is coupled to the at least one optical sensor. The analyzer is configured to perform one or more of detecting and predicting corrosion of the transformer tank based on the output of the at least one optical sensor.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: January 19, 2021
    Assignees: Palo Alto Research Center Incorporated, Consolidated Edison Company of New York, Inc.
    Inventors: Mark Teepe, Todd Karin, Peter Kiesel, Ajay Raghavan, Jane Shin, Bradley Kittrell, Serena Lee
  • Patent number: 10848050
    Abstract: A power system includes at least one power unit, and each power unit has a direct current power source comprising at least two photovoltaic modules connected in series, each module having a positive and a negative output terminal, and a distributed inverter consisting of and an associated transistor switches connected to either the positive or negative output terminal of the at least two photovoltaic modules, and an alternating current power output. A power system has at least two power units, and each power unit has a direct current power source of at least one photovoltaic modules, and at least two transistor switches, wherein each power unit produces one polarity of voltage, used for generating alternating current power.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: November 24, 2020
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventor: Todd Karin
  • Publication number: 20200209288
    Abstract: A partial discharge (PD) detection system includes a PD sensor configured to sense a PD event of an electrical system and to generate a sensor signal in response to the PD event. An envelope generator is coupled to receive the sensor signal from the PD sensor. The envelope generator extracts an envelope signal from the sensor signal. A digitizer is configured to convert the envelope signal to a digital representation of the PD event.
    Type: Application
    Filed: December 28, 2018
    Publication date: July 2, 2020
    Inventors: Todd Karin, Peter Kiesel, Ajay Raghavan
  • Publication number: 20200209301
    Abstract: A partial discharge (PD) transducer that includes a PD sensor configured to sense a PD event of an electrical system. At least one light emitting device (LED) is arranged in series with the PD sensor. The LED is configured to receive the electrical sensor signal from the PD sensor and to generate a light signal in response to the electrical sensor signal.
    Type: Application
    Filed: December 28, 2018
    Publication date: July 2, 2020
    Inventors: Todd Karin, Peter Kiesel, Ajay Raghavan
  • Publication number: 20200007077
    Abstract: A power system includes at least one power unit, and each power unit has a direct current power source comprising at least two photovoltaic modules connected in series, each module having a positive and a negative output terminal, and a distributed inverter consisting of and an associated transistor switches connected to either the positive or negative output terminal of the at least two photovoltaic modules, and an alternating current power output. A power system has at least two power units, and each power unit has a direct current power source of at least one photovoltaic modules, and at least two transistor switches, wherein each power unit produces one polarity of voltage, used for generating alternating current power.
    Type: Application
    Filed: December 11, 2018
    Publication date: January 2, 2020
    Inventor: TODD KARIN
  • Publication number: 20200002165
    Abstract: A system for hydrocarbon decomposition comprising a reactor volume, a mechanism to distribute the liquid catalyst as a liquid mist, a distributor to distribute a hydrocarbon reactant, a heat source, a separator to separate the solid product from the liquid catalyst, a re-circulation path and mechanism to re-circulate the liquid catalyst, and an outlet for at least one gaseous product. A system to distribute a liquid to an enclosed volume as a mist has a plurality of orifices designed to break the liquid into a mist. A method to decompose a hydrocarbon reactant includes generating a mist of a liquid catalyst, heating the reactor volume, introducing a hydrocarbon reactant into the reactor volume to produce a solid product and a gaseous product, separating the solid product from the liquid catalyst, removing the solid and gaseous products from the reactor volume, and recirculating the liquid catalyst to the reactor volume.
    Type: Application
    Filed: April 25, 2019
    Publication date: January 2, 2020
    Inventors: DIVYARAJ DESAI, TODD KARIN, JESSICA LOUIS BAKER RIVEST
  • Patent number: 10498217
    Abstract: A method of controlling a plurality of power converters in a power system includes controlling switching times on the plurality of power converters receiving an input using a master controller, such that at least one of the plurality of power converters switches at a different time than at least one other of the plurality of power converters to provide a summation of outputs at a coupling point, and adjusting control signals from the master controller to each power converter to control the summation of the outputs to a desired output. A method of controlling a plurality of power converters in a power system includes determining a base frequency, assigning an operating frequency to the power converters, wherein the operating frequency is a multiple of the base frequency, to each of the power converters, operating the plurality of power converters at the assigned frequencies, and summing the individual outputs of the power converters to produce an output.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: December 3, 2019
    Assignee: Palo Alto Research Center Incorporated
    Inventor: Todd Karin