Patents by Inventor Kasemsan Siri

Kasemsan Siri 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).

  • Patent number: 11984721
    Abstract: An apparatus may include a group of distributed-input series-output (DISO) converters, each of which are actively controlled by a common maximum power tracking (MPT) controller. The common MPT controller is configured to actively control one of the DISO converters in the group of DISO converters to update a present group-peak power voltage of the one DISO converters while remaining DISO converters in the group of DISO converters are controlled to hold most recently grouped peak power voltages updated during their previously non-overlapping uniform time windows of active MPT control.
    Type: Grant
    Filed: May 13, 2021
    Date of Patent: May 14, 2024
    Assignee: THE AEROSPACE CORPORATION
    Inventor: Kasemsan Siri
  • Patent number: 11851178
    Abstract: An unmanned aerial vehicle (UAV) that provides increased operational flight endurance and efficiency. The UAV includes a power generation system, which includes an internal combustion engine and one or more batteries (batteries). The power generation system is configured to generate power for propulsion of the UAV. The internal combustion engine is configured to power a lift propeller, generating vertical lift of the UAV, and the batteries are configured to power a micro-propeller assembly, propelling the UAV in a forward direction or multiple additional directions.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: December 26, 2023
    Assignee: The Aerospace Corporation
    Inventors: Steven Beck, David Caldwell, Christopher Hartney, Bernard Harris Jefferson, Jr., Jeffrey Lang, John Morales, Martin Panevsky, Kasemsan Siri, Evan Ulrich, Richard Welle, Allyson Yarbrough
  • Publication number: 20210265837
    Abstract: An apparatus may include a group of distributed-input series-output (DISO) converters, each of which are actively controlled by a common maximum power tracking (MPT) controller. The common MPT controller is configured to actively control one of the DISO converters in the group of DISO converters to update a present group-peak power voltage of the one DISO converters while remaining DISO converters in the group of DISO converters are controlled to hold most recently grouped peak power voltages updated during their previously non-overlapping uniform time windows of active MPT control.
    Type: Application
    Filed: May 13, 2021
    Publication date: August 26, 2021
    Inventor: Kasemsan Siri
  • Publication number: 20210253240
    Abstract: An unmanned aerial vehicle (UAV) that provides increased operational flight endurance and efficiency. The UAV includes a power generation system, which includes an internal combustion engine and one or more batteries (batteries). The power generation system is configured to generate power for propulsion of the UAV. The internal combustion engine is configured to power a lift propeller, generating vertical lift of the UAV, and the batteries are configured to power a micro-propeller assembly, propelling the UAV in a forward direction or multiple additional directions.
    Type: Application
    Filed: February 14, 2020
    Publication date: August 19, 2021
    Inventors: Steven BECK, David CALDWELL, Christopher HARTNEY, Bernard Harris JEFFERSON, JR., Jeffrey LANG, John MORALES, Martin PANEVSKY, Kasemsan SIRI, Evan ULRICH, Richard WELLE, Allyson YARBROUGH
  • Patent number: 11056881
    Abstract: An apparatus may include a group of distributed-input series-output (DISO) converters, each of which are actively controlled by a common maximum power tracking (MPT) controller. The common MPT controller is configured to actively control one of the DISO converters in the group of DISO converters to update a present group-peak power voltage of the one DISO converters while remaining DISO converters in the group of DISO converters are controlled to hold most recently grouped peak power voltages updated during their previously non-overlapping uniform time windows of active MPT control.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: July 6, 2021
    Assignee: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Publication number: 20200381918
    Abstract: An apparatus may include a group of distributed-input series-output (DISO) converters, each of which are actively controlled by a common maximum power tracking (MPT) controller. The common MPT controller is configured to actively control one of the DISO converters in the group of DISO converters to update a present group-peak power voltage of the one DISO converters while remaining DISO converters in the group of DISO converters are controlled to hold most recently grouped peak power voltages updated during their previously non-overlapping uniform time windows of active MPT control.
    Type: Application
    Filed: June 3, 2019
    Publication date: December 3, 2020
    Inventor: Kasemsan SIRI
  • Patent number: 9960602
    Abstract: Optimum power tracking for distributed power sources may be provided by a family of power system architectures having distributed-input series-output (DISO) converters. The DISO converters may be controlled to achieve uniform input voltages across their respective distributed power sources while also tracking an optimum power point of the power system. Each DISO converter may be operably connected to a corresponding power source to form a power-processing channel. A controller may be operably connected to the plurality of DISO converters to control the operation thereof.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: May 1, 2018
    Assignee: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Patent number: 9853573
    Abstract: A grid-tie inverter (the “inverter”) may include a power converter that receives a direct current (DC) output voltage from a DC input power source, and generates an alternating current (AC) output voltage for transmission to a utility power grid. The inverter may also include a system controller that regulates the AC output voltage to efficiently transfer power to the utility power grid while a system AC load may be terminated across the output of the inverter. The inverter may also provide active power factor correction between the utility grid voltage and current. Furthermore, the inverter may also offer harmonic cancellation, which minimizes or eliminates the harmonic content out of the utility power grid voltage and current.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: December 26, 2017
    Assignee: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Publication number: 20170279376
    Abstract: A grid-tie inverter (the “inverter”) may include a power converter that receives a direct current (DC) output voltage from a DC input power source, and generates an alternating current (AC) output voltage for transmission to a utility power grid. The inverter may also include a system controller that regulates the AC output voltage to efficiently transfer power to the utility power grid while a system AC load may be terminated across the output of the inverter. The inverter may also provide active power factor correction between the utility grid voltage and current. Furthermore, the inverter may also offer harmonic cancellation, which minimizes or eliminates the harmonic content out of the utility power grid voltage and current.
    Type: Application
    Filed: March 28, 2016
    Publication date: September 28, 2017
    Inventor: KASEMSAN SIRI
  • Patent number: 9325176
    Abstract: Embodiments of the present invention provide an apparatus for optimum power tracking for distributed power sources. The apparatus includes a plurality of distributed-input parallel-output converters. Each converter is operably connected to a corresponding power source to form a power-processing channel. The apparatus also includes a controller operably connected to the plurality of converters, and is configured to provide uniform input voltages across each power source while tracking an optimum power point. The controller provides tolerance for multiple faults up to N?1 power source failures for the apparatus comprising an N-channel converter power system with N distributed power sources.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: April 26, 2016
    Assignee: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Patent number: 9013061
    Abstract: A multisource power system utilizing output isolated DC-DC converters in a serial input, parallel output arrangement provides uniform input voltage distribution and selective maximum power tracking wherein embodiments include maximum power tracking (“MPT”) with a single MPT controller, a battery dominated output voltage bus, and a regulated output voltage bus.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: April 21, 2015
    Assignee: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Publication number: 20140319918
    Abstract: Optimum power tracking for distributed power sources may be provided by a family of power system architectures having distributed-input series-output (DISO) converters. The DISO converters may be controlled to achieve uniform input voltages across their respective distributed power sources while also tracking an optimum power point of the power system. Each DISO converter may be operably connected to a corresponding power source to form a power-processing channel. A controller may be operably connected to the plurality of DISO converters to control the operation thereof.
    Type: Application
    Filed: June 24, 2014
    Publication date: October 30, 2014
    Inventor: Kasemsan Siri
  • Publication number: 20130293022
    Abstract: Embodiments of the present invention provide an apparatus for optimum power tracking for distributed power sources. The apparatus includes a plurality of distributed-input parallel-output converters. Each converter is operably connected to a corresponding power source to form a power-processing channel. The apparatus also includes a controller operably connected to the plurality of converters, and is configured to provide uniform input voltages across each power source while tracking an optimum power point. The controller provides tolerance for multiple faults up to N?1 power source failures for the apparatus comprising an N-channel converter power system with N distributed power sources.
    Type: Application
    Filed: May 2, 2012
    Publication date: November 7, 2013
    Applicant: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Publication number: 20130088081
    Abstract: A multisource power system utilizing output isolated DC-DC converters in a serial input, parallel output arrangement provides uniform input voltage distribution and selective maximum power tracking wherein embodiments include maximum power tracking (“MPT”) with a single MPT controller, a battery dominated output voltage bus, and a regulated output voltage bus.
    Type: Application
    Filed: October 11, 2011
    Publication date: April 11, 2013
    Inventor: Kasemsan Siri
  • Patent number: 8351229
    Abstract: A power system controller includes multiple channels and each channel has a current sharing controller that is coupled to a shared current signal bus and a shared voltage signal bus.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: January 8, 2013
    Assignee: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Publication number: 20110235379
    Abstract: A power system controller includes multiple channels and each channel has a current sharing controller that is coupled to a shared current signal bus and a shared voltage signal bus.
    Type: Application
    Filed: March 24, 2010
    Publication date: September 29, 2011
    Inventor: Kasemsan Siri
  • Patent number: 7964991
    Abstract: A channelized uniform distribution power system controls individual channels of power converters with each channel of power converters having uniform output power as the channels are controlled by voltage control signals from respective controllers that are interconnected by a shared current signal and a shared voltage signal for controlling the channels to provide uniform power, with conventional current limiting and voltage regulation functions. Each channel may have a number of converters being parallel-input parallel-output connected converters, series input parallel-output connected converters, and parallel-input series output connected converters.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: June 21, 2011
    Assignee: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Publication number: 20100213767
    Abstract: A channelized uniform distribution power system controls individual channels of power converters with each channel of power converters having uniform output power as the channels are controlled by voltage control signals from respective controllers that are interconnected by a shared current signal and a shared voltage signal for controlling the channels to provide uniform power, with conventional current limiting and voltage regulation functions. Each channel may have a number of converters being parallel-input parallel-output connected converters, series input parallel-output connected converters, and parallel-input series output connected converters.
    Type: Application
    Filed: February 20, 2009
    Publication date: August 26, 2010
    Inventor: Kasemsan Siri
  • Patent number: 7773395
    Abstract: A uniform converter input voltage distribution power system evenly controls the individual input voltages of DC-to-DC series-input parallel-output connected converters using a uniform input voltage distribution controller including a generator for generating respective error signals from the converter input voltages using a common distribution reference signal for providing respective converter control signals connected to the converters through respective shared-bus controls for evenly distributing the power delivered by the converters that are shared-bus current-mode converters for preferably providing a low output voltage. Employing a common regulation control signal, the controller can also provide system output voltage regulation, system input current limiting, proportional-voltage control, relaxed voltage uniformity, and fault-tolerant power control.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: August 10, 2010
    Assignee: The Aerospace Corporation
    Inventor: Kasemsan Siri
  • Patent number: 7564149
    Abstract: A power and control architecture employing circuitry that sequentially regulate power flows from independent solar-array sources or a mixture of power sources providing power to a common load. The device may be used on a satellite with solar-array sources; however it may also be used on ground based systems. Stiff bus voltage regulation is obtained by tightly controlling the most recently activated power-processing channel while keeping the previously activated power-processing channels in the Maximum Power Tracking mode to supply maximum power to a common load. The remaining power-processing channels are turned off or operated in stand-by mode. In an alternative system, with primary design goal of uniform power sharing among solar-array sources, all solar array sources are activated with uniform power sharing at light load and, as load demand increases, sequentially controlled to operate in the Maximum Power Tracking mode one solar array source at a time as necessary.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: July 21, 2009
    Inventors: Kasemsan Siri, Richard L. Weinbrenner