Patents by Inventor Kamiar J. Karimi

Kamiar J. Karimi 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: 10539629
    Abstract: A programmable alternating current (AC) load in communication with an equipment under test (EUT) is disclosed, where the EUT generates an equipment under test voltage. The programmable AC load includes an active load profiler (ALP) for creating current modulation load profiles that are sent to the EUT. The ALP includes a voltage source inverter, a control module in operative communication with the voltage source inverter of the ALP, and a grid-connected inverter having an AC side and a direct current (DC) side. The AC side of the voltage source inverter is in communication with the EUT for receiving the equipment under test voltage. The control module sends a control duty signal to the voltage source inverter indicating a switching frequency and a duty cycle of the current modulation load profiles.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: January 21, 2020
    Inventors: Dazhong Gu, Dariusz Czarkowski, Francisco de Leon, Kamiar J. Karimi, Eugene V. Solodovnik, Shengyi Liu
  • Patent number: 10425056
    Abstract: An EMI filter network may be used to provide interference filtering for multiple loads (referred to collectively as a dynamic load). In one aspect, the EMI filter network includes electrical switches that establish different configurations or arrangements of passive circuit elements (e.g., inductors and capacitors) where each configuration generates a different filter value. The EMI filter network may be communicatively coupled to a controller which changes the configuration of the EMI filter network using the switches in response to the dynamic load changing operational states. For example, each configuration of the EMI filter network may correspond to one of the operational states of the dynamic load. Thus, as the operational state of the dynamic load changes—e.g., different motors become operational—the controller alters the configuration of the EMI filter network to provide a filter value that corresponds to the current operational state of the dynamic load.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: September 24, 2019
    Assignee: THE BOEING COMPANY
    Inventors: Yujie Song, Shengyi Liu, Eugene Solodovnik, Kamiar J. Karimi
  • Patent number: 10389114
    Abstract: A method and apparatus for providing regulated direct current power for a direct current load on an aircraft. A regulated transformer rectifier unit on an aircraft comprises a plurality of converter modules connected in parallel between an input and an output. Each converter module in the plurality of converter modules comprises a transformer rectifier unit. The plurality of converter modules are controlled by a controller to provide regulated direct current power at the output from alternating current power provided at the input from an alternating current power source on the aircraft.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: August 20, 2019
    Assignee: The Boeing Company
    Inventors: Evelyn Marie Matheson, Kamiar J. Karimi, Mehdy Barekatein, Eugene V. Solodovnik, Sheverria Antony Aikens, Mark Eugene Liffring
  • Publication number: 20190181669
    Abstract: An electrical power system for regenerative loads may include a DC bus and an electrical actuator load, where back-driving the electrical actuator load generates regenerative electrical energy, and where the electrical actuator load is configured to transmit the regenerative electrical energy to the DC bus. The system may also include at least one additional load, where at least a portion of the regenerative electrical energy is transmitted to the at least one additional load.
    Type: Application
    Filed: December 7, 2017
    Publication date: June 13, 2019
    Inventors: Eugene V. Solodovnik, Thomas F. Currier, Mark E. Liffring, Kamiar J. Karimi
  • Patent number: 10320314
    Abstract: Systems and methods are provided for an aircraft propulsor configured to generate electrical power through a variable frequency generator in response to rotation of a gear train. The aircraft propulsor includes compensation circuitry. The aircraft propulsor further includes exciter circuitry that, when powered by an excitation signal, generates a magnetic field that interacts with a rotating variable frequency generator to generate electrical power. The exciter circuitry may be powered by at least a portion of the power generated by the variable frequency generator. The compensation circuitry may adjust the excitation signal to reduce the effect of torsional oscillation of the gear train and/or the variable frequency generator on the quality of power produced by the variable frequency generator.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: June 11, 2019
    Assignee: The Boeing Company
    Inventors: Michael T. Fox, Kamiar J. Karimi, Sheau-Wei J. Fu, Eugene V. Solodovnik, Paul A. Mezs, Jerry E. Farstad
  • Patent number: 10312017
    Abstract: A multi-phase autotransformer (10) is disclosed. The exemplary transformer includes primary windings PWA, PWB, PWC) and secondary windings (SWA1-SWA4, SWB1-SWB4, SWC1-SWC4). The primary windings are connected in a delta configuration and to a three-phase input voltage source. Each secondary winding is electrically connected to a primary winding but is magnetically coupled to a different primary winding. Three sets of secondary windings provide three three-phase outputs (350A, 350B, 350C), each of which has a voltage which is less than the three-phase input voltage, the three-phase output of each set being phase-shifted with respect to the other sets. These three sets also, collectively, provide a multi-phase output (325). Another set of secondary windings, in conjunction with the input voltage, provides another multi-phase phase output (360) which has approximately the same voltage as the three-phase input voltage.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: June 4, 2019
    Assignee: THE BOEING COMPANY
    Inventors: Jian Huang, Eugene V. Solodovnik, Kamiar J. Karimi
  • Publication number: 20190120913
    Abstract: A programmable alternating current (AC) load in communication with an equipment under test (EUT) is disclosed, where the EUT generates an equipment under test voltage. The programmable AC load includes an active load profiler (ALP) for creating current modulation load profiles that are sent to the EUT. The ALP includes a voltage source inverter, a control module in operative communication with the voltage source inverter of the ALP, and a grid-connected inverter having an AC side and a direct current (DC) side. The AC side of the voltage source inverter is in communication with the EUT for receiving the equipment under test voltage. The control module sends a control duty signal to the voltage source inverter indicating a switching frequency and a duty cycle of the current modulation load profiles.
    Type: Application
    Filed: December 17, 2018
    Publication date: April 25, 2019
    Inventors: Dazhong Gu, Dariusz Czarkowski, Francisco de Leon, Kamiar J. Karimi, Eugene V. Solodovnik, Shengyi Liu
  • Publication number: 20190113558
    Abstract: A method for managing power in an airplane. Power quality data and load management data are collected from airplane systems in the airplane at a variable sampling rate using data collectors assigned to the airplane systems in which the variable sampling rate increases in response to a selected trigger event. The power quality data and the load management data are received by a power monitor from the data collectors during phases of flight for the airplane. A group of load management operations for the airplane systems are performed by a load manager in the airplane during operation of the airplane. The group of load management operations is performed using the power quality data and the load management data received from the data collectors during the phases of flight for the airplane.
    Type: Application
    Filed: October 17, 2017
    Publication date: April 18, 2019
    Inventors: Anil Kumar, Kamiar J. Karimi, Timothy M. Mitchell, Evelyn M. Matheson, Eugene V. Solodovnik
  • Publication number: 20190023412
    Abstract: An aircraft may include at least one secondary power system requiring secondary power, at least two main engines, and at least three non-propulsive utility power (NPUP) generation systems. The NPUP generation systems may each be configured to provide full-time secondary power during operation of the aircraft. The NPUP generation systems may be configured to provide at least a portion of the secondary power required by the secondary power system.
    Type: Application
    Filed: October 10, 2017
    Publication date: January 24, 2019
    Inventors: David S. Krug, Kamiar J. Karimi, Thomas F. Currier, Andrew J. Bayliss, George M. Roe, Mark E. Liffring, Mark W. Lesyna, Christopher M. Severns, Andrew Johnson
  • Patent number: 10184990
    Abstract: A programmable AC load in communication with an equipment under test (EUT) is disclosed. The EUT generates an equipment under test voltage. The programmable alternating current (AC) load includes an active load profiler (ALP), a grid-connecter inverter, and an operational mode selector. The operational mode selector is in communication with an AC side of the grid-connected inverter. The operational mode selector places the programmable AC load in either a regenerative mode where the equipment under test voltage is sent to a main grid or a dissipative mode where the equipment under test voltage is dissipated by heat.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: January 22, 2019
    Assignee: The Boeing Company
    Inventors: Dazhong Gu, Dariusz Czarkowski, Francisco de Leon, Kamiar J. Karimi, Eugene V. Solodovnik, Shengyi Liu
  • Publication number: 20180316294
    Abstract: Systems and methods are provided for an aircraft propulsor configured to generate electrical power through a variable frequency generator in response to rotation of a gear train. The aircraft propulsor includes compensation circuitry. The aircraft propulsor further includes exciter circuitry that, when powered by an excitation signal, generates a magnetic field that interacts with a rotating variable frequency generator to generate electrical power. The exciter circuitry may be powered by at least a portion of the power generated by the variable frequency generator. The compensation circuitry may adjust the excitation signal to reduce the effect of torsional oscillation of the gear train and/or the variable frequency generator on the quality of power produced by the variable frequency generator.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 1, 2018
    Inventors: Michael T. Fox, Kamiar J. Karimi, Sheau-Wei J. Fu, Eugene V. Solodovnik, Paul A. Mezs, Jerry E. Farstad
  • Publication number: 20180269535
    Abstract: A battery and related methods are described. The battery can include a plurality of battery cell segments. Each of the battery cell segments can include: a positive temperature coefficient (PTC) material whose resistance increases with temperature, an anode segment, a cathode segment, and one or more current limiters. The one or more current limiters of a battery cell segment are configured to conditionally electrically isolate the battery cell segment based on an occurrence of a short circuit within the battery cell segment. The battery can be used to store electrical power and/or provide electrical power to a load.
    Type: Application
    Filed: December 7, 2017
    Publication date: September 20, 2018
    Inventors: Shengyi Liu, John A. Trela, Kamiar J. Karimi
  • Publication number: 20180269463
    Abstract: A battery and related methods are described. The battery can include a plurality of battery cell segments. Each of the battery cell segments can include an anode segment, a cathode segment, and one or more current limiters. The one or more current limiters are configured to conditionally electrically isolate the battery cell segment based on an occurrence of a short circuit within the battery cell segment. The battery can be used to store electrical power and/or provide electrical power to a load.
    Type: Application
    Filed: March 20, 2017
    Publication date: September 20, 2018
    Inventors: Shengyi Liu, John A. Trela, Kamiar J. Karimi
  • Patent number: 10079493
    Abstract: A system and method for providing power to a vehicle is disclosed. The system can include a plurality of parallel module converter modules (“modules”) each capable of supplying a predetermined electrical load. The plurality of parallel module converter modules can be networked to form a parallel module converter (“converter”) for prioritizing and allocating each electrical load to one or more parallel module converter modules. Each module can include an internal protection controller and a logic controller. The individual modules can provide power to various loads in the vehicle either alone, or in concert with other modules. The system can enable fewer power controllers to be used, saving weight and time. The controllers in the system can also be utilized at a higher level reducing unnecessary redundancy.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: September 18, 2018
    Assignee: The Boeing Company
    Inventors: Adam J. Winstanley, Eugene V. Solodovnik, Kamiar J. Karimi, Shengyi Liu, Lijun Gao, Matthew J. Krolak
  • Patent number: 10063077
    Abstract: A system architecture for a battery charger that employs GaN-based power devices. The system takes advantage of the active power electronics circuits for power conversion, utilizing controls for power factor correction at its input and constant current/constant voltage regulation at its output. Specifically, a universal GaN-based battery charger architecture is proposed for charging either low- or high-voltage batteries using either three-phase 230-V variable frequency or three-phase 115-V constant frequency AC input power, while meeting stringent power quality and electromagnetic interference aerospace requirements.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: August 28, 2018
    Assignee: The Boeing Company
    Inventors: Eugene V. Solodovnik, Kamiar J. Karimi
  • Patent number: 9977858
    Abstract: Methods, computer-readable storage mediums and systems provide for designing a motor drive power system including switching mode power conversion equipment. According to aspects of the disclosure, a resonant point is shifted to a shifted resonant point by changing impedance of at least one of a feeder or a motor. An EMI filter is designed for the shifted resonant point that is at a higher frequency such that the EMI filter for the shifted resonant point is lighter as compared to an EMI filter designed for the resonant point before it is shifted.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: May 22, 2018
    Assignee: THE BOEING COMPANY
    Inventors: Eugene V. Solodovnik, Kamiar J. Karimi
  • Patent number: 9815564
    Abstract: An aircraft may include at least one secondary power system requiring secondary power, at least two main engines, and at least three non-propulsive utility power (NPUP) generation systems. The NPUP generation systems may each be configured to provide full-time secondary power during operation of the aircraft. The NPUP generation systems may be configured to provide at least a portion of the secondary power required by the secondary power system.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: November 14, 2017
    Assignee: The Boeing Company
    Inventors: David S. Krug, Kamiar J. Karimi, Thomas F. Currier, Andrew J. Bayliss, George M. Roe, Mark E. Liffring, Mark W. Lesyna, Christopher M. Severns, Andrew Johnson
  • Patent number: 9811130
    Abstract: A system to control a power distribution system includes a system controller configured to determine an allocation of power during a first time period for each of a plurality of subsystems. The system also includes a subsystem controller communicatively coupled to the system controller. The subsystem controller is associated with a device and configured to receive power allocation data indicating the allocation of power for the device from the system controller. The subsystem controller is further configured to receive operation request data indicating a request to operate the device and produce a model operation of the device for a second time period based on the power allocation data, the operation request data, and a cost-utility function associated with the device. The subsystem controller is also configured to communicate, to the system controller, projected power demand data associated with the modeled operation of the device during the second time period.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: November 7, 2017
    Assignee: The Boeing Company
    Inventors: Sheau-Wei J. Fu, Kamiar J. Karimi, Mehran Mesbahi, Daniel Zelazo
  • Patent number: 9809321
    Abstract: An electrical power distribution system for converting and distributing electrical power to local loads within a vehicle is disclosed. The electrical power distribution system includes at least one generator providing high voltage AC (HVAC) power, a primary power panel for receiving the HVAC power from the generator, and a plurality of distribution conversion units located throughout the vehicle. The plurality of distribution conversion units convert the HVAC power from the primary power panel into medium voltage AC (MVAC) power and low voltage DC (LVDC) power for consumption by the local loads within the vehicle. The electrical power distribution system also includes a plurality of HVAC distribution feeder lines. Each HVAC distribution feeder line connects the primary power panel to one of the plurality of distribution conversion units.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: November 7, 2017
    Assignee: The Boeing Company
    Inventors: Mark Eugene Liffring, Kamiar J. Karimi
  • Patent number: 9804613
    Abstract: A method for controlling a circuit control system. Currents are sensed at outputs of transistors in the circuit control system. Levels are identified for the currents. A number of characteristics of the transistors are controlled while the currents flow out of the transistors such that the currents flowing out of the transistors have desired levels.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: October 31, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Lijun Gao, Shengyi Liu, Eugene V. Solodovnik, Kamiar J. Karimi