Patents by Inventor Subrata Saha

Subrata Saha 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: 20210075276
    Abstract: A transverse flux machine includes a stator assembly consisting of a plurality of shaped cores, each having a base with a plurality of legs with a corresponding gap between each leg and each leg having a winding. A rotor assembly is positioned adjacent the stator assembly and includes a rotor disc, and a rotor ring with a plurality of rotor poles interleaved with a plurality of interpoles. The plurality of rotor poles and plurality of interpoles are radially disposed around the rotor disc. The plurality of rotor poles include a plurality of focused rotor poles interleaved with a plurality of diffused rotor poles.
    Type: Application
    Filed: February 4, 2020
    Publication date: March 11, 2021
    Inventors: Yilmaz SOZER, Anik CHOWDHURY, Shuvajit DAS, Naoto SAITO, Subrata SAHA, Takamasa TAKEUCHI, Yasunobu SHIOTSUKI, Teppei TSUDA
  • Patent number: 10886867
    Abstract: An inverter control device that controls an inverter as a control target, the inverter being connected to a direct-current power supply and connected to an alternating-current rotating electrical machine so as to convert power between direct current and alternating current of a plurality of phases, and the inverter having an arm for each alternating-current phase, the arm including a series circuit of an upper-stage switching element and a lower-stage switching element, the inverter control device including an electronic control unit.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: January 5, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada, Yuki Sugiyama, Masaya Kokubo
  • Publication number: 20200389115
    Abstract: Two inverters provided at both ends of each open-end winding, respectively, are appropriately controlled. A rotating electrical machine control device (1) that has at least two control schemes among pulse width modulation control, active short-circuit control, and rectangular-wave control, as control schemes for a first inverter (11) and a second inverter (12), and that can control the first inverter (11) and the second inverter (12) by control schemes which are independent of each other considers one of the plurality of control schemes as a first control scheme and one of the plurality of control schemes different than the first control scheme as a second control scheme, and has a control mode in which the first inverter (11) is controlled by the first control scheme and the second inverter (12) is controlled by the second control scheme.
    Type: Application
    Filed: January 17, 2019
    Publication date: December 10, 2020
    Applicant: AISIN AW CO.,LTD.
    Inventors: Subrata SAHA, Isao FUJIWARA
  • Publication number: 20200259425
    Abstract: An inverter control device that includes an electronic control unit that is configured to perform full active short circuit control when the contactors are in an open state and the rotating electrical machine is in a rotating state, the full active short circuit control bringing an upper-stage-side switching element and a lower-stage-side switching element for at least one phase among switching elements for a plurality of phases in the inverter into an on state to allow current to flow back between the rotating electrical machine and the inverter.
    Type: Application
    Filed: September 27, 2018
    Publication date: August 13, 2020
    Applicant: AISIN AW CO., LTD.
    Inventors: Arinori SHIMADA, Subrata SAHA, Motohiro NAKASHIMA
  • Publication number: 20200251182
    Abstract: Embodiments of the present invention are directed to methods for adapting machine learning, redescription, and computational homology techniques to the identification of pathogenic pathways. A non-limiting example of the computer-implemented method includes receiving genetic and biological data and generating a data matrix based on the data. The data matrix can include one or more features, and each feature can be associated with a known feature value. A collection of sets of features representing pathways, genes, or a genetic combination of genotype values can be determined. The method also includes determining a first prediction for a feature value of a selected feature to be predicted in the collection, permuting one or more rows of the data matrix, and recalculating a second prediction for the feature value based on the permutation. A prediction score can be determined based on the first prediction, the second prediction, and a known feature value.
    Type: Application
    Filed: February 4, 2019
    Publication date: August 6, 2020
    Inventors: Daniel Enoch Platt, ALDO GUZMAN SAENZ, Laxmi Parida, Subrata Saha
  • Publication number: 20200220479
    Abstract: An inverter control device that controls an inverter connected to a direct-current power supply and connected to an alternating-current rotating electrical machine to convert electric power between direct current and alternating current of a plurality of phases, the inverter control device including an electronic control unit that is configured to perform, in a state in which one switching element of a plurality of switching elements included in the inverter has a turn-off failure in which the switching element always goes into an off state, torque reduction control for reducing torque of the rotating electrical machine or deceleration control for outputting torque in a reverse direction from a rotation direction of the rotating electrical machine by performing switching control of the plurality of switching elements.
    Type: Application
    Filed: September 28, 2018
    Publication date: July 9, 2020
    Applicant: AISIN AW CO., LTD.
    Inventors: Masashi MIYAZAKI, Subrata SAHA, Isao FUJIWARA, Yuki SUGIYAMA
  • Publication number: 20190379623
    Abstract: Systems, methods, and other embodiments associated with a message recognition system configurable to define new message formats and interpret electronic transaction messages are described. In one embodiment, a method includes analyzing an electronic transaction message received from a remote device to determine a message type of the electronic transaction message. A message type data structure is queried to determine whether the message type is defined in the message type data structure. A message type configuration interface comprising one or more input fields for defining the message type is generated. Parameters are received via the one or more input fields of the message type configuration interface, and a message type definition is generated based upon the one or more parameters. The message type data structure is reconfigured to include the message type definition.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 12, 2019
    Inventors: Subrata SARKAR, Amit Kumar SAHOO, Arup SAHA, Kushagra JINDAL, Santanu Kumar CHAKRABARTY, Ruchi TRIPATHI, K. R. SRIKANT
  • Patent number: 10404188
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of the plurality of phases, the arms for respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, and a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase; and a controller that outputs switching control signals for performing switching control on the switch sections.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: September 3, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada, Yutaka Hotta
  • Patent number: 10351002
    Abstract: An inverter control device that controls a rotary electric machine drive device that includes an inverter with a plurality of switching elements, where the active short circuit control is executed in a high rotational speed region, and the shut-down control is executed in a low rotational speed region, which is on a low rotational speed side with respect to the high rotational speed region, in accordance with at least a rotational speed of the rotary electric machine.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: July 16, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Takashi Yoshida, Yuki Sugiyama, Yoichi Tajima, Masaya Kokubo
  • Publication number: 20190214933
    Abstract: An inverter control device that controls an inverter as a control target, the inverter being connected to a direct-current power supply and connected to an alternating-current rotating electrical machine so as to convert power between direct current and alternating current of a plurality of phases, and the inverter having an arm for each alternating-current phase, the arm including a series circuit of an upper-stage switching element and a lower-stage switching element, the inverter control device including an electronic control unit.
    Type: Application
    Filed: September 29, 2017
    Publication date: July 11, 2019
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Arinori SHIMADA, Yuki SUGIYAMA, Masaya KOKUBO
  • Patent number: 10312827
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of a plurality of phases, the arms for the respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, the power conversion device being configured to convert electric power between DC power and AC power of the plurality of phases while a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: June 4, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada, Yutaka Hotta
  • Publication number: 20180287510
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of the plurality of phases, the arms for respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, and a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase; and a controller that outputs switching control signals for performing switching control on the switch sections.
    Type: Application
    Filed: November 7, 2016
    Publication date: October 4, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Arinori SHIMADA, Yutaka HOTTA
  • Publication number: 20180278178
    Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of a plurality of phases, the arms for the respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, the power conversion device being configured to convert electric power between DC power and AC power of the plurality of phases while a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase.
    Type: Application
    Filed: November 15, 2016
    Publication date: September 27, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Arinori SHIMADA, Yutaka HOTTA
  • Patent number: 10027271
    Abstract: A rotating electrical machine control device with an electronic control unit that is programmed to: switch a modulation method between asynchronous modulation in which switching of the inverter is controlled by modulated pulses generated based on a carrier having a first carrier frequency which is not synchronous with rotation of the rotating electrical machine and synchronous modulation in which switching of the inverter is controlled by modulated pulses generated in synchronization with rotation of the rotating electrical machine, the switching of the modulation method between the asynchronous modulation and the synchronous modulation being performed according to an operating condition of the rotating electrical machine which includes at least a rotational speed of the rotating electrical machine.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: July 17, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Yasuyuki Sato, Chaeduck Chon, Yuki Sugiyama
  • Patent number: 10003295
    Abstract: An inverter control device for controlling a rotating electric machine drive device that drives an alternating current rotating electric machine and includes an inverter and a DC link capacitor, the inverter being connected to a DC power supply via a contactor, being connected to the rotating electric machine, and performing power conversion between direct current and three-phase alternating current, the DC link capacitor smoothing a DC link voltage, which is a DC-side voltage of the inverter, and the inverter control device performing switching control on switching elements that form the inverter.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: June 19, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada
  • Patent number: 9998052
    Abstract: The magnetic pole position of a rotary electric machine is electrically derived accurately by reducing a voltage error due to a dead time while suppressing the influence on the operation efficiency of the rotary electric machine. A control device performs dead-time compensation, and performs current feedback control in a d-q-axis vector coordinate system using a magnetic pole position computed on the basis of an induced voltage produced by rotation of a rotor or on the basis of a response component to a high-frequency observation signal applied to the rotary electric machine. In the case where the rotary electric machine is controlled by deciding current commands Id*, Iq* in the d-q-axis vector coordinate system, the rotary electric machine control device controls the rotary electric machine such that the magnitude of an armature current Ia becomes equal to or more than a lower-limit current Ia_min prescribed in advance.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: June 12, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Arinori Shimada, Masashi Miyazaki, Subrata Saha, Keisuke Nishimura, Ken Iwatsuki
  • Patent number: 9948219
    Abstract: A rotating electrical machine control device where the changeover control circuit switches the source of electric power for the electronic control unit when the electric power that is supplied from the second DC power supply to the electronic control unit becomes equal to or lower than a predetermined first reference value and electric power that is output from the backup power supply is equal to or higher than a predetermined second reference value, and the electronic control unit uses the electric power supplied from the backup power supply to cause the inverter to perform the switching operation to perform fail-safe control.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: April 17, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Yutaka Hotta, Yasushi Nakamura
  • Publication number: 20180083565
    Abstract: A rotating electrical machine control device with an electronic control unit that is programmed to: switch a modulation method between asynchronous modulation in which switching of the inverter is controlled by modulated pulses generated based on a carrier having a first carrier frequency which is not synchronous with rotation of the rotating electrical machine and synchronous modulation in which switching of the inverter is controlled by modulated pulses generated in synchronization with rotation of the rotating electrical machine, the switching of the modulation method between the asynchronous modulation and the synchronous modulation being performed according to an operating condition of the rotating electrical machine which includes at least a rotational speed of the rotating electrical machine.
    Type: Application
    Filed: June 2, 2016
    Publication date: March 22, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Yasuyuki SATO, Chaeduck CHON, Yuki SUGIYAMA
  • Patent number: 9853591
    Abstract: An inverter control device for controlling a rotating electric machine drive device that includes an inverter and a DC link capacitor, the inverter being connected to a DC power supply via a contactor, being connected to an alternating current rotating electric machine, and performing power conversion between direct current and three-phase alternating current, an arm for each alternating current phase being formed by a series circuit including an upper side switching element and a lower side switching element, and the DC link capacitor smoothing a DC link voltage, which is a DC-side voltage of the inverter, the inverter control device performing switching control on the switching elements that form the inverter.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 26, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada
  • Publication number: 20170331400
    Abstract: A rotating electrical machine control device where the changeover control circuit switches the source of electric power for the electronic control unit when the electric power that is supplied from the second DC power supply to the electronic control unit becomes equal to or lower than a predetermined first reference value and electric power that is output from the backup power supply is equal to or higher than a predetermined second reference value, and the electronic control unit uses the electric power supplied from the backup power supply to cause the inverter o perform the switching operation to perform fail-safe control.
    Type: Application
    Filed: December 17, 2015
    Publication date: November 16, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Yutaka HOTTA, Yasushi NAKAMURA