Patents by Inventor Debabrata Pal

Debabrata Pal 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: 20210131751
    Abstract: A heat exchanger includes a pair of opposed, spaced apart heat exchanger plates defining a heat exchanger volume therebetween having an inlet and opposed outlet. A plurality of heat exchanger ribs are included within the heat exchanger volume. Each rib defines a rib body spanning the heat exchanger volume. Each rib body includes a plurality of slits therethrough to define a flow path through the heat exchanger ribs from the inlet to the outlet of the heat exchanger volume. The ribs and slits can be formed using ultrasonic additive manufacturing (UAM), for example.
    Type: Application
    Filed: December 21, 2020
    Publication date: May 6, 2021
    Applicant: Hamilton Sundstrand Corporation
    Inventor: Debabrata Pal
  • Publication number: 20210123379
    Abstract: A generator cooling assembly is provided and includes a rotor, a generator assembly and an air-cycle machine (ACM). The generator assembly includes a generator housing, a generator housed in the generator housing and a shaft coupled to the rotor to transmit shaft power from the rotor to the generator to drive the generator. The ACM is housed in the generator housing and is receptive of air. The air is cooled by the ACM and output from the ACM to the generator as fully cooled air to cool the generator.
    Type: Application
    Filed: October 23, 2019
    Publication date: April 29, 2021
    Inventors: Shin Katsumata, Debabrata Pal, Kris H. Campbell, Erika M. Danckers, Andreas C. Koenig, Brian C. Konopa, Jonathan C. Dell
  • Publication number: 20210104932
    Abstract: An electromechanical actuation motor includes a main housing, a series of stator windings, and a first circumferential row of fins. The series of stator windings is disposed inside of the main housing. The first circumferential row of fins is connected to and extends radially from an outer surface of the main housing. The main housing and the first circumferential row of fins are formed as a single piece of material via layer-by-layer additive manufacturing. Each fin of the first circumferential row of fins includes a first portion and a second portion. The first portion is integrally formed with and attached to the outer surface of the main housing at a first end of the first portion. The second potion is attached to and integrally formed with a second end of the first portion. The first portion intersects the second portion to form a T-shape.
    Type: Application
    Filed: October 4, 2019
    Publication date: April 8, 2021
    Inventors: Naison E. Mastrocola, Debabrata Pal
  • Publication number: 20210050138
    Abstract: A transformer assembly includes a housing, a core within an interior of the housing, and at least one winding positioned around the core. The at least one winding and the core are mounted to the housing with potting material. At least a portion of a fluid circuit is defined within at least one wall of the housing. The at least the portion of the fluid circuit is defined through an opening in the at least one wall of the housing in fluid communication with the interior of the housing. A transformer assembly includes a housing, a core within an interior of the housing, at least one winding positioned around the core, and a fluid circuit defined at least partially within at least one wall of the housing being configured such that heat is transferred to the fluid from at least one of the core and the at least one winding.
    Type: Application
    Filed: August 16, 2019
    Publication date: February 18, 2021
    Inventors: Debabrata Pal, Ashutosh Joshi, Mark W. Metzler, Eric A. Carter
  • Patent number: 10892665
    Abstract: A variable speed, constant frequency (VSCF) generator system is provided and includes a generator portion, a first cooling circuit and a second cooling circuit. The generator portion includes a generator, electronics configured to control operations of the generator and a housing to house the generator and the electronics. The first cooling circuit is provided such that first fluid exiting the generator passes through a first cooling element prior to returning to the generator. The second cooling circuit is provided such that second fluid exiting the electronics passes through a second cooling element prior to being pumped back toward the electronics.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: January 12, 2021
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventors: Debabrata Pal, John Huss, Mark W. Metzler
  • Patent number: 10892082
    Abstract: An inductor housing for housing an inductor having a core and a winding includes an outer annular wall and a third wall extending inward from the outer annular wall such that the outer annular wall and the third wall at least partially define an annular cavity configured to receive the inductor. The inductor housing further includes an attachment feature configured to couple the inductor housing to a secondary housing. The inductor is configured to be enclosed within the annular cavity and the secondary housing, and coolant from a coolant supply is configured to flow past the annular cavity and contact the winding of the inductor.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: January 12, 2021
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Mark W. Metzler, Debabrata Pal, Mustansir Kheraluwala, Charles Patrick Shepard
  • Publication number: 20200412205
    Abstract: A system can include a compressor outlet line configured to receive compressor outlet flow from a compressor, a bypass line in fluid communication with the compressor outlet line and a motor outlet line to divert a bypass flow of the compressor outlet flow. The system can include at least one pump in fluid communication between the bypass line and the motor outlet line such that the bypass flow at least partially drives the pump to pull cooling flow through a motor to cool the motor.
    Type: Application
    Filed: June 26, 2019
    Publication date: December 31, 2020
    Inventors: Debabrata Pal, John H. Paliulis, Christina W. Millot
  • Patent number: 10871334
    Abstract: A heat exchanger includes a pair of opposed, spaced apart heat exchanger plates defining a heat exchanger volume therebetween having an inlet and opposed outlet. A plurality of heat exchanger ribs are included within the heat exchanger volume. Each rib defines a rib body spanning the heat exchanger volume. Each rib body includes a plurality of slits therethrough to define a flow path through the heat exchanger ribs from the inlet to the outlet of the heat exchanger volume. The ribs and slits can be formed using ultrasonic additive manufacturing (UAM), for example.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: December 22, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Debabrata Pal
  • Publication number: 20200383233
    Abstract: An electrical power unit cooling system including at least one cooling fin configured to be thermally connected to a bus housing of the electrical power unit, the bus housing being configured to be attached to a surface of an aircraft fan housing such that the at least one cooling fin protrudes through the fan housing in order to be cooled by air flow within the fan housing.
    Type: Application
    Filed: May 31, 2019
    Publication date: December 3, 2020
    Inventors: Craig R. LeGros, Tom A. Utecht, Debabrata Pal
  • Patent number: 10839252
    Abstract: A method of verifying graphical objects using color invariant feature matching is provided. The method comprises determining, for each of a plurality of primary color channels, a color value for each inlier pixel in an actual object for that primary color channel; determining, for each color channel, a color difference factor (CDF) for an expected object by comparing, for each of the plurality of primary color channels, the color value for each inlier pixel in the expected object to the color value for each corresponding inlier pixel in the actual object; determining a false point value for the expected object from the CDF; and determining that the expected object matches the actual object when the false point value for the expected object is lower than the false point value for other expected objects.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: November 17, 2020
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Abhishek Alladi, Debabrata Pal, Luke Zeleznak, Parag R Rao
  • Publication number: 20200358338
    Abstract: A motor cooling system including, an engine nacelle defining a primary axis, a stator housing within the engine nacelle, a plurality of stator guide vanes attached to the stator circumferentially disposed around the primary axis, where at least one stator guide vane of the plurality of stator guide vanes includes at least one conduit configured to receive a fluid from a first engine component in the engine nacelle and wherein at least one stator guide vane of the plurality of stator guide vanes includes at least one conduit configured to pass the fluid to a second engine component in the engine nacelle.
    Type: Application
    Filed: May 10, 2019
    Publication date: November 12, 2020
    Inventor: Debabrata Pal
  • Patent number: 10825630
    Abstract: A contactor post for an electrical contactor may comprise a body comprising an electrically and thermally conductive material, and a heat sink shunt extending from the body and comprising the electrically and thermally conductive material, wherein the body and the heat sink shunt are comprised of a single piece of the electrically and thermally conductive material.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: November 3, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Debabrata Pal, Mark Hamilton Severson
  • Patent number: 10804023
    Abstract: An inductor includes a printed wiring board (PWB) and a plurality of electrically-conductive heat pipes operatively connected to the PWB. The PWB includes electrically conductive traces electrically connected to the plurality of electrically-conductive heat pipes. The traces and plurality of electrically conductive heat pipes form an inductor winding. A method of manufacturing an inductor includes mounting a plurality of electrically conductive heat pipes to a printed wiring board (PWB), wherein the PWB includes electrically conductive traces to connect the plurality of electrically-conductive heat pipes to form an inductor winding.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 13, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Debabrata Pal, Harry H. Chai, Dwight D. Schmitt, Frank Z. Feng, Charles Shepard
  • Patent number: 10778056
    Abstract: A stator of an electrical generator includes a stator core including a plurality of stacked stator laminations and at least one end turn. At least one cooling passage provides a fluid flow path through a portion of the plurality of stator laminations to the at least one end turn. The at least one cooling passage includes at least one radial channel arranged in fluid communication with an axial channel. The at least one cooling passage is formed directly into the portion of the plurality of stator laminations.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: September 15, 2020
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventor: Debabrata Pal
  • Patent number: 10767566
    Abstract: An electric propulsion system for a gas turbine engine may comprise an electric motor disposed within a nacelle of the gas turbine engine, wherein the electric motor is configured to receive a bypass air from a fan bypass duct for cooling the electric motor and the electric motor is configured to drive a low speed shaft of the gas turbine engine.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: September 8, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Debabrata Pal
  • Patent number: 10673211
    Abstract: A contactor assembly post is provided. The contactor assembly post includes a first portion electrically connected to an external bus bar at an exterior of an electrical contactor housing, a second portion electrically connected to an internal bus bar at the exterior of the electrical contactor housing, a third portion and fins. The internal bus bar is configured to extend into an interior of the electrical contactor housing to be electrically coupled to another internal bus bar. The third portion extends transversely between the first and second portions. The fins extend transversely from multiple points defined along a longitudinal axis of the third portion.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: June 2, 2020
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventors: Debabrata Pal, Mark Hamilton Severson
  • Patent number: 10651761
    Abstract: A phase leg for an inverter includes a switching module having a switch device, a power lead connected to the switching module and in electrical communication with the switch device, and a drive lead. The drive lead is connected to the switching module, is in electrical communication with the switch device, and is segregated from the power lead to limit heating of a drive module connected to the drive lead from current flowing through the power lead. Multilevel inverters and methods of making phase legs for inverters are also described.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: May 12, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Debabrata Pal
  • Publication number: 20200135378
    Abstract: An inductor assembly includes a housing including a base, a sidewall, and an insert. The base and the sidewall define a cavity and the insert being positioned within the cavity. A core assembly is positioned within the cavity. The core assembly includes a core and a plurality of windings wrapped about the core and disposed between the sidewall and the insert. A flow path is formed in the housing for receiving a coolant to remove heat from the core assembly.
    Type: Application
    Filed: October 31, 2018
    Publication date: April 30, 2020
    Inventors: Ashutosh Joshi, Debabrata Pal, Mark W. Metzler, Richard L. Downing, Charles Patrick Shepard
  • Patent number: 10618637
    Abstract: A cooled compressor system is provided including: a compressor that in operation compresses air; an electric motor that in operation drives the compressor, the electric motor having a back iron, a motor stator radially inward from the back iron, and a motor rotor radially inward from the motor stator; an airflow system fluidly connected to the compressor, the airflow system in operation directs air through the back iron and in between the motor stator and motor rotor; an airflow inlet that in operation allows an inflow of air to the airflow system; and an airflow outlet that in operation allows an outflow of air from the airflow system; wherein the air travels from the airflow inlet to the airflow outlet through the compressor and the airflow system.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: April 14, 2020
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventor: Debabrata Pal
  • Publication number: 20200112217
    Abstract: A rotor for an electrical machine includes a core including a plurality of rotor poles circumferentially spaced apart from one another about a hub. A winding is wound about the rotor poles. The winding passes longitudinally through a respective winding gap between each circumferentially adjacent pair of rotor poles. A cooling tube extends through at least one of the respective winding gaps.
    Type: Application
    Filed: October 4, 2018
    Publication date: April 9, 2020
    Inventor: Debabrata Pal