Patents by Inventor Lei Hao

Lei Hao 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: 11152876
    Abstract: A system includes a position sensor configured to detect positions of a rotor of a starter motor relative to the position sensor and to output signals indicating the detected positions and a controller configured to rotate the rotor to a plurality of predetermined positions relative to a stator of the starter motor, determine sensed positions of the rotor based on the signals output by the position sensor, and calculate an initial detected position of the rotor based on relationships between the determined sensed positions of the rotor and an expected angular distance between adjacent ones of the predetermined positions.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: October 19, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Lei Hao, Chandra S. Namuduri
  • Patent number: 11138978
    Abstract: A method and system of automatically identifying topics of a conversation are provided. An electronic data package comprising a sequence of utterances between conversation entities is received by a computing device. Each utterance is classified to a corresponding social action. One or more utterances in the sequence are grouped into a segment based on a deep learning model. A similarity of topics between adjacent segments is determined. Upon determining that the similarity is above a predetermined threshold, the adjacent segments are grouped together. A transcript of the conversation including the grouping of the adjacent segments is stored in a memory.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: October 5, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Margaret Helen Szymanski, Lei Huang, Robert John Moore, Raphael Arar, Shun Jiang, Guangjie Ren, Eric Liu, Pawan Chowdhary, Chung-hao Tan, Sunhwan Lee
  • Patent number: 11133680
    Abstract: System and method of dynamically balancing a rechargeable energy storage assembly having two or more respective units, a respective switch for each of the respective units and at least one sensor. The system includes a controller configured to control operation of the respective switch. The respective switch is configured to enable a respective circuit connection to the respective units when in an ON state and disable the respective circuit connection when in an OFF state. The respective units are characterized by a respective state of charge obtained based in part on the at least one sensor. A controller is configured to selectively employ at least one of a plurality of charging modes to charge one or more of the respective units, through operation of the respective switch. The plurality of charging modes includes a rest charging mode, a rapid initial charging mode and a rapid final charging mode.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: September 28, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Yue-Yun Wang, Lei Hao, Suresh Gopalakrishnan
  • Patent number: 11133771
    Abstract: An electric drive system of a vehicle comprises a motor, a position sensor, an inverter, sensors to sense current and voltage supplied to the motor, and a controller to control the motor by controlling the inverter based on data from the position sensor and the sensors and a torque command. The controller estimates a motor torque using a motor model, calculates the motor torque, and generates a first state of health for the electric drive system based on a difference between the estimated and calculated motor torques. The controller generates, in response to the first state of health being less than or equal to a first threshold, a second state of health for at least one of the position sensor, the sensors, and the motor, and determines whether one of the position sensor, the sensors, and the motor is faulty based on the first and second states of health.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: September 28, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Jiyu Zhang, Siddharth Ballal, Lei Hao, Wesley G. Zanardelli, Bojian Cao, Mutasim Salman
  • Publication number: 20210282433
    Abstract: The disclosure belongs to the technical field of food additives, and provides a method for preparing a calcium carbonate-based edible lake. The method comprises the following steps: S1, dissolving carbonate in water to obtain carbonate solution; S2, dissolving water-soluble anionic pigment into the carbonate solution obtained in step S1 to obtain mixed solution; S3, adding hydrochloric acid to the mixed solution obtained in step S2 to adjust pH to 7-10.5; S4, dissolving a calcium salt into water and then adding the above solution into the solution obtained in step S3, controlling the pH of the mixed solution to 6-9, carrying out ultrasound treatment for 1-10 min, centrifuging to obtain a calcium carbonate precipitate adsorbed with pigment; and S5, drying and grinding the calcium carbonate precipitate adsorbed with pigment obtained in step S4 to obtain the calcium carbonate-based edible lake.
    Type: Application
    Filed: May 31, 2021
    Publication date: September 16, 2021
    Inventors: Dongdong YUAN, Chengtao WANG, Guorong LIU, Lei CHENG, Shuai HAO, Baoguo SUN
  • Patent number: 11114145
    Abstract: Disclosed is a three-dimensional magnetic device based on a spin Hall effect which includes an internal electrode, at least one magnetic junction and at least one external electrode. The internal electrode, the at least one magnetic junction and the at least one external electrode have columnar structures. Each of the at least one magnetic junction comprises a magnetic free layer, a magnetic reference layer and a non-magnetic spacing layer between magnetic free layer and magnetic reference layer. The magnetic free layer is in contact with internal electrode, and the magnetic reference layer in each of the at least one magnetic junction is in contact with a corresponding one of the at least one external electrode. The three-dimensional magnetic device may be stacked in a normal direction of the bottom surface of the internal electrode. Magnetization reversal of three-dimensional magnetic device may be realized by a combination of a spin-orbit torque and a spin transfer torque.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: September 7, 2021
    Assignee: Xi'an Jiaotong University
    Inventors: Tai Min, Runzi Hao, Lei Wang, Xue Zhou
  • Publication number: 20210261675
    Abstract: The present application provides single-domain antibodies, and chimeric antigen receptors comprising one or more antigen binding domains each comprising a single-domain antibody. Further provided are engineered immune effector cells (such as T cells) comprising the chimeric antigen receptors. Pharmaceutical compositions, kits and methods of treating cancer are also provided.
    Type: Application
    Filed: February 1, 2021
    Publication date: August 26, 2021
    Applicant: Legend Biotech USA Inc.
    Inventors: Xiaohu FAN, Chuan-Chu CHOU, Qiuchuan ZHUANG, Pingyan WANG, Lin WANG, Lei YANG, Jiaying HAO
  • Publication number: 20210242691
    Abstract: A system for use with a direct current fast-charging (DCFC) station includes a controller and battery system. The battery system includes first and second battery packs, and first, second, and third switches. The switches have ON/OFF conductive states commanded by the controller to connect the battery packs in a parallel-connected (P-connected) or series-connected (S-connected) configuration. An electric powertrain with one or more electric machines is powered via the battery system. First and second charge ports of the system are connectable to the station via a corresponding charging cable. The first charge port receives a low or high charging voltage from the station. The second charge port receives a low charging voltage. When the station can supply the high charging voltage to the first charge port, the controller establishes the S-connected configuration via the switches, and thereafter charges the battery system solely via the first charge port.
    Type: Application
    Filed: February 3, 2020
    Publication date: August 5, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Lei Hao, Yue-Yun Wang, Suresh Gopalakrishnan, Chandra S. Namuduri, Rashmi Prasad, Madhusudan Raghavan
  • Publication number: 20210211012
    Abstract: A permanent magnet electric motor includes a shaft extending along a longitudinal axis and a rotor mounted on the shaft. The rotor is rotatable concomitantly with the shaft about the longitudinal axis, the rotor defines an innermost rotor edge. The innermost rotor edge is sized to receive the shaft. The permanent magnet electric motor further includes a stator. The shaft defines a jacket configured to receive a coolant. The jacket is disposed about the longitudinal axis. The jacket is elongated in a first direction. The first direction is parallel to the longitudinal axis. The rotor defines a plurality of longitudinal channels. Each of the plurality of longitudinal channel is elongated along the first direction, and each of the plurality of longitudinal channels is in fluid communication with the jacket to allow fluid flow between the jacket and the plurality of the longitudinal channels.
    Type: Application
    Filed: January 7, 2020
    Publication date: July 8, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Xiaofeng Yang, Wei Zeng, Lei Hao, Srihari K. Gangaraj
  • Publication number: 20210211008
    Abstract: A permanent magnet electric motor includes a shaft extending along a longitudinal axis, wherein the shaft defines a shaft jacket extending along a first direction, a rotor mounted on the shaft, a stator disposed about the rotor. The rotor defines a plurality of longitudinal channels each with the shaft jacket. The longitudinal channels are part of a rotor jacket. The rotor jacket includes a plurality of inlets fluidly interconnecting the shaft jacket and the plurality of the longitudinal channels. The rotor jacket includes an inner edge and an outer edge opposite the inner edge. The rotor jacket includes a plurality of outlets each in fluid communication with the plurality of longitudinal channels. Each of the outlets is closer to the inner edge than to the outer edge of the rotor jacket.
    Type: Application
    Filed: January 8, 2020
    Publication date: July 8, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Xiaofeng Yang, Wei Zeng, Lei Hao, Srihari K. Gangaraj
  • Publication number: 20210184610
    Abstract: A diagnostic system includes: a current command module configured to, based on a motor torque request, a motor speed, a direct current (DC) bus voltage, generate a d-axis current command for an electric motor and a q-axis current command for the electric motor; a voltage command module configured to, based on the d-axis current command and the q-axis current command, generate a d-axis voltage command and a q-axis voltage command; a switching control module configured to control switching of an inverter module based on the d-axis voltage command and the q-axis voltage command, where the inverter module is configured to apply power to stator windings of the electric motor from the DC bus; and a fault module configured to selectively indicate that the stator windings of the electric motor are degraded when the d-axis voltage command is less than a predetermined nominal d-axis voltage of the electric motor.
    Type: Application
    Filed: December 16, 2019
    Publication date: June 17, 2021
    Inventors: Jiyu ZHANG, Siddharth BALLAL, Lei HAO, Wesley G. ZANARDELLI, Bojian CAO
  • Publication number: 20210175835
    Abstract: An electric drive system of a vehicle comprises a motor, a position sensor, an inverter, sensors to sense current and voltage supplied to the motor, and a controller to control the motor by controlling the inverter based on data from the position sensor and the sensors and a torque command. The controller estimates a motor torque using a motor model, calculates the motor torque, and generates a first state of health for the electric drive system based on a difference between the estimated and calculated motor torques. The controller generates, in response to the first state of health being less than or equal to a first threshold, a second state of health for at least one of the position sensor, the sensors, and the motor, and determines whether one of the position sensor, the sensors, and the motor is faulty based on the first and second states of health.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 10, 2021
    Inventors: Jiyu ZHANG, Siddharth BALLAL, Lei HAO, Wesley G. ZANARDELLI, Bojian CAO, Mutasim SALMAN
  • Publication number: 20210175826
    Abstract: A control system for an electric motor includes a power input calculating module configured to calculate power input to the electric motor. A power output calculating module is configured to calculate power output by the electric motor. A power loss calculating module is configured to calculate power loss in the electric motor based on the power input and the power output. A fault module is configured to compare the power loss in the electric motor to one or more predetermined power loss thresholds and to selectively alter operation of the electric motor based on the comparison.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 10, 2021
    Inventors: Jiyu ZHANG, Lei HAO
  • Patent number: 11025116
    Abstract: A fluid-cooled axial flux motor having a stator, a rotor disposed adjacent to the stator, and a rotor shaft rotationally fixed onto the rotor. The rotor shaft includes axial coolant passageway having an inlet and opposite outlet. The rotor includes coolant passageways extending radially from rotor shaft. The rotor coolant passageways include an inlet in fluid communication with the outlet of the axial coolant passageway and an outlet. The fluid-cooled axial flux motor further includes a coolant distribution header having an inlet in fluid communication with the outlet of the rotor coolant passageway, a coolant collection header having an inlet in fluid communication with the outlet of the coolant distribution header, and a collection header outlet. The outlet of the coolant distribution header is disposed above the stator and the inlet of the coolant collection header is disposed below the stator with respect to the direction of gravity.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: June 1, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Jian Yao, Yusheng Zou, Chengwu Duan, Zhen Gao, Lei Hao, Alireza Fatemi
  • Patent number: 11015564
    Abstract: A starter assembly includes a multi-phase brushless electric motor including a stator, a rotor disposed on a rotatable shaft, and a motor endcap disposed at a first end of the stator. An electronic commutator assembly includes a sensing circuit, a control electronics subassembly, a power electronics subassembly and a heat sink. The sensing circuit is disposed adjacent to the second end of the rotatable shaft. The control electronics subassembly, the power electronics subassembly and the heat sink are disposed on disk-shaped devices arranged in a stacked configuration orthogonal to the axis defined by the rotatable shaft. The control electronics subassembly is disposed adjacent to the sensing circuit, and the power electronics subassembly is disposed adjacent to the control electronics subassembly. The control electronics subassembly is interposed between the power electronics subassembly and the sensing circuit. The heat sink is disposed adjacent to the power electronics subassembly.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: May 25, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Chandra S. Namuduri, Lei Hao, Alexandru Rajala, Thomas W. Nehl
  • Publication number: 20210129706
    Abstract: Management system for a rechargeable energy storage device in an electric vehicle and corresponding method is disclosed. The rechargeable energy storage device has one or more battery packs each having a plurality of modules with one or more respective cells. A respective module management unit is embedded in each of the plurality of modules through respective microcircuits and configured to determine one or more local parameters. A supervisory controller is configured for two-way communication with the respective module management unit. The supervisory controller is configured to receive the local parameters, determine one or more global pack parameters based in part on the local parameters and transmit the global pack parameters back to the respective management unit. The supervisory controller is configured to control operation of the rechargeable energy storage device based in part on the global pack parameters and the local parameters.
    Type: Application
    Filed: November 6, 2019
    Publication date: May 6, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yue-Yun Wang, Lei Hao, Brian J. Koch, Jeffrey S. Piasecki, Garrett M. Seeman
  • Publication number: 20210129686
    Abstract: An electric propulsion system includes a battery pack and a DC-DC converter. The converter has a bypass switch and semiconductor switches. A traction power inverter module (“TPIM”) rectifies a DC bus voltage on the voltage bus to produce an AC bus voltage. An electric machine is connected to the TPIM and energized via the AC bus voltage. A controller calculates required output power from the converter based on a requested operating mode, and speed and torque of the electric machine. When the output power exceeds a threshold, the bypass switch closes to bypass the converter. When the output power is less than the threshold, the controller uses a minimum loss voltage from a loss map as a target control voltage of the converter to optimize efficiency of the electric propulsion system.
    Type: Application
    Filed: November 6, 2019
    Publication date: May 6, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Lei Hao, Chandra S. Namuduri, Suresh Gopalakrishnan, Chengwu Duan, Norman K. Bucknor
  • Patent number: 10998840
    Abstract: An electric drive system includes a battery pack, a power inverter module (“PIM”), an electric machine, a switching circuit, and a controller. The electric machine has three or more phase legs. The PIM has a DC-side connected to the battery pack, and an alternating current (“AC”)-side connected to the electric machine. The switching circuit includes AC switches, and for each phase leg also includes three or more winding sections each electrically connectable to or disconnectable from the battery pack and PIM via the AC switches. The controller commands a binary switching state of each respective AC switch based on the rotary speed to implement one of three different speed-based operating modes of the electric machine, and to thereby vary a conductive path from the PIM to the electric machine through one or more of the connected winding sections.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: May 4, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Lei Hao, Chandra S. Namuduri, Rashmi Prasad
  • Publication number: 20210111648
    Abstract: A system includes a position sensor configured to detect positions of a rotor of a starter motor relative to the position sensor and to output signals indicating the detected positions and a controller configured to rotate the rotor to a plurality of predetermined positions relative to a stator of the starter motor, determine sensed positions of the rotor based on the signals output by the position sensor, and calculate an initial detected position of the rotor based on relationships between the determined sensed positions of the rotor and an expected angular distance between adjacent ones of the predetermined positions.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 15, 2021
    Inventors: Lei HAO, Chandra S. NAMUDURI
  • Publication number: 20210107348
    Abstract: A vehicle powertrain includes a first power-source configured to generate a first power-source torque and a multiple speed-ratio transmission configured to transmit the first power-source torque to power the vehicle. The powertrain also includes a fluid coupling having a fluid pump shaft operatively connected to the first power-source and a turbine shaft operatively connected to the multi-speed transmission. The fluid coupling is configured to multiply the first power-source torque, and transfer the multiplied first power-source torque to the multiple speed-ratio transmission. The powertrain additionally includes a second power-source configured to generate a second power-source torque and a first torque transfer system configured to connect the second power-source to the first power-source. The powertrain further includes a second torque transfer system configured to connect the second power-source to the multi-speed transmission. A motor vehicle having such a powertrain is also envisioned.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 15, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Neeraj S. Shidore, Derek F. Lahr, Lei Hao, Madhusudan Raghavan, Suresh Gopalakrishnan