Patents by Inventor Mengwei Campbell
Mengwei Campbell 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).
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Publication number: 20230286451Abstract: The system 100 can include: a vehicle platform 110; a vehicle interface 120; and/or any other suitable components. The system 100 can optionally include driver system 130, an auxiliary sensor payload 140, a logger 150, and/or any other suitable components. However, the system 100 can additionally or alternatively include any other suitable set of components. The system functions to facilitate control of the vehicle platform based on driver inputs received at the vehicle interface. Additionally or alternatively, the system can function to facilitate installation and/or operation of a driver system (e.g., such as an AI driver or autonomous agent; modular driver system) and/or an auxiliary sensor payload onboard the vehicle platform. However, the system 100 can have any other suitable functionality.Type: ApplicationFiled: March 1, 2023Publication date: September 14, 2023Inventors: Andreas Bauer, Graham Doorley, Eric Canonge, Kyle Motter, Julian Lemus, Mengwei Campbell
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Patent number: 10700629Abstract: Systems and methods are disclosed for determining an operating point for controlling an electric motor. An exemplary system may include a voltage monitor configured to determine a voltage applied to the electric motor. The system may also include a controller configured to determine the operating point based on the voltage. The controller may include a comparator configured to determine a difference between the voltage and a reference voltage. The controller may also include a regulator configured to generate a correction signal for reducing the difference. The controller may be configured to determine the operating point when the difference is below a predetermined threshold.Type: GrantFiled: May 2, 2016Date of Patent: June 30, 2020Assignee: FARADAY&FUTURE INC.Inventors: Mengwei Campbell, Stefan Grubic
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Patent number: 10622870Abstract: Systems and methods are described for controlling an electric motor. An exemplary system may include a torque detector configured to detect an output torque of the electric motor. The system may also include a controller configured to control a voltage source to apply a predetermined voltage to drive the electric motor and determine an operating table containing a plurality of operating points. The controller may select an operating current value and generate a plurality of current commands. The controller may also apply each of the plurality of current commands to drive the electric motor and determine an output torque generated by the electric motor. The controller may further determine a target current command that generates a maximum output torque. In addition, the controller may determine an operating point of the operating table based on the target current command. Moreover, the controller may control the electric motor using the operating table.Type: GrantFiled: June 22, 2016Date of Patent: April 14, 2020Assignee: FARADAY & FUTURE INC.Inventors: Mengwei Campbell, Stefan Grubic
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Patent number: 9919615Abstract: Circuits, methods, and systems for driving a load are described. An exemplary driving circuit may include a plurality of switching devices and a controller electrically connected to the switching devices. The controller may be configured to receive a reference voltage signal indicating a target voltage for the driving circuit to generate to drive the load. The reference voltage signal may correspond to a reference space vector in a reference frame. The controller may also be configured to determine that the reference space vector falls within a holding region in which the reference voltage signal is subject to over-modulation. The controller may then generate an adjusted reference voltage signal by adjusting the reference space vector to match a predetermined space vector associated with the holding region. In addition, the controller may be configured to provide the adjusted reference voltage signal to the plurality of switching devices to drive the load.Type: GrantFiled: June 20, 2016Date of Patent: March 20, 2018Assignee: FARADAY & FUTURE INC.Inventors: Stefan Grubic, Mengwei Campbell
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Publication number: 20170361732Abstract: Circuits, methods, and systems for driving a load are described. An exemplary driving circuit may include a plurality of switching devices and a controller electrically connected to the switching devices. The controller may be configured to receive a reference voltage signal indicating a target voltage for the driving circuit to generate to drive the load. The reference voltage signal may correspond to a reference space vector in a reference frame. The controller may also be configured to determine that the reference space vector falls within a holding region in which the reference voltage signal is subject to over-modulation. The controller may then generate an adjusted reference voltage signal by adjusting the reference space vector to match a predetermined space vector associated with the holding region. In addition, the controller may be configured to provide the adjusted reference voltage signal to the plurality of switching devices to drive the load.Type: ApplicationFiled: June 20, 2016Publication date: December 21, 2017Inventors: Stefan Grubic, Mengwei Campbell
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Publication number: 20170317617Abstract: Systems and methods are described for controlling an electric motor. An exemplary system may include a torque detector configured to detect an output torque of the electric motor. The system may also include a controller configured to control a voltage source to apply a predetermined voltage to drive the electric motor and determine an operating table containing a plurality of operating points. The controller may select an operating current value and generate a plurality of current commands. The controller may also apply each of the plurality of current commands to drive the electric motor and determine an output torque generated by the electric motor. The controller may further determine a target current command that generates a maximum output torque. In addition, the controller may determine an operating point of the operating table based on the target current command. Moreover, the controller may control the electric motor using the operating table.Type: ApplicationFiled: June 22, 2016Publication date: November 2, 2017Inventors: Mengwei Campbell, Stefan Grubic
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Publication number: 20170317635Abstract: Systems and methods are disclosed for determining an operating point for controlling an electric motor. An exemplary system may include a voltage monitor configured to determine a voltage applied to the electric motor. The system may also include a controller configured to determine the operating point based on the voltage. The controller may include a comparator configured to determine a difference between the voltage and a reference voltage. The controller may also include a regulator configured to generate a correction signal for reducing the difference. The controller may be configured to determine the operating point when the difference is below a predetermined threshold.Type: ApplicationFiled: May 2, 2016Publication date: November 2, 2017Inventors: Mengwei Campbell, Stefan Grubic
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Publication number: 20170151875Abstract: Systems and methods are disclosed for detecting position measurement errors for an electric motor. An exemplary system may include a position sensor configured to measure a position of a rotor of the electric motor. The system may also include an error detector configured to detect an offset between the position measured by the position sensor and an actual position of the rotor. The error detector may include a signal injector configured to inject a probing signal to a stator of the electric motor. The error detector may also include a signal sampler configured to sample a response signal from the stator of the electric motor. The error detector may be configured to derive the offset based on the response signal.Type: ApplicationFiled: November 30, 2015Publication date: June 1, 2017Inventors: Mengwei Campbell, Jie Dang
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Patent number: 9166518Abstract: In accordance with exemplary embodiments, rotor temperature estimation is provided for estimating rotor temperatures of an electric motor in an electric vehicle. A method comprises estimating a rotor temperature in a controller for an electric motor of a vehicle using a fast-mode rotor temperature estimator for a time interval, and then deactivating the fast-mode rotor temperate estimator after the time interval and activating a normal-mode rotor temperature estimator in the controller for the electric motor of the vehicle. A system comprises an electric motor, a resistance rotor temperature estimator including a limit value limiting a temperature estimate increase for temperature estimates, and a controller for the electric motor, which uses the temperature estimate and is configured to temporarily increase the limit value of the resistance rotor temperature estimator providing a fast-mode rotor temperature estimate.Type: GrantFiled: June 27, 2011Date of Patent: October 20, 2015Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Mengwei Campbell, Bon Ho Bae
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Patent number: 8390228Abstract: A method for controlling an induction machine having a rotor includes the steps of obtaining a torque command, calculating an estimated squared value of resistance of the rotor using the torque command, determining an offset for the resistance of the rotor, and generating an updated measure of rotor resistance using the estimated squared value and the offset.Type: GrantFiled: December 10, 2009Date of Patent: March 5, 2013Assignee: GM Global Technology Operations LLCInventors: Mengwei Campbell, Bon Ho Bae, Silva Hiti, Sibaprasad Chakrabarti
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Publication number: 20120330483Abstract: In accordance with exemplary embodiments, rotor temperature estimation is provided for estimating rotor temperatures of an electric motor in an electric vehicle. A method comprises estimating a rotor temperature in a controller for an electric motor of a vehicle using a fast-mode rotor temperature estimator for a time interval, and then deactivating the fast-mode rotor temperate estimator after the time interval and activating a normal-mode rotor temperature estimator in the controller for the electric motor of the vehicle. A system comprises an electric motor, a resistance rotor temperature estimator including a limit value limiting a temperature estimate increase for temperature estimates, and a controller for the electric motor, which uses the temperature estimate and is configured to temporarily increase the limit value of the resistance rotor temperature estimator providing a fast-mode rotor temperature estimate.Type: ApplicationFiled: June 27, 2011Publication date: December 27, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC.Inventors: Mengwei CAMPBELL, Bon Ho BAE
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Patent number: 8339082Abstract: A method is provided for controlling an induction motor having a rotor. The method includes receiving a torque command; comparing the torque command to a threshold torque value; generating, with a first estimation module, a first estimated rotor resistance when the torque command is less than or equal to the threshold torque value; generating, with a second estimation module, a second estimated rotor resistance when the torque command is greater than the threshold torque value; and generating control signals for the induction motor based on the first estimated rotor resistance or the second estimated rotor resistance.Type: GrantFiled: May 21, 2010Date of Patent: December 25, 2012Assignee: GM Global Technology Operations LLCInventors: Mengwei Campbell, Bon Ho Bae, Milun Perisic, Yo Chan Son
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Patent number: 8174224Abstract: Methods and systems are provided for producing a commanded torque in an electric motor in a vehicle. A method comprises obtaining a torque command, obtaining a speed of the electric motor, and operating the inverter based at least in part on a voltage command that corresponds to minimal current through the electric motor for producing the commanded torque at the instantaneous speed of the electric motor.Type: GrantFiled: May 22, 2009Date of Patent: May 8, 2012Assignee: GM Global Technology Operations LLCInventors: Sibaprasad Chakrabarti, Mengwei Campbell
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Publication number: 20110285342Abstract: A method is provided for controlling an induction motor having a rotor. The method includes receiving a torque command; comparing the torque command to a threshold torque value; generating, with a first estimation module, a first estimated rotor resistance when the torque command is less than or equal to the threshold torque value; generating, with a second estimation module, a second estimated rotor resistance when the torque command is greater than the threshold torque value; and generating control signals for the induction motor based on the first estimated rotor resistance or the second estimated rotor resistance.Type: ApplicationFiled: May 21, 2010Publication date: November 24, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: MENGWEI CAMPBELL, BON HO BAE, MILUN PERISIC, YO CHAN SON
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Publication number: 20110140646Abstract: A method for controlling an induction machine having a rotor includes the steps of obtaining a torque command, calculating an estimated squared value of resistance of the rotor using the torque command, determining an offset for the resistance of the rotor, and generating an updated measure of rotor resistance using the estimated squared value and the offset.Type: ApplicationFiled: December 10, 2009Publication date: June 16, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Mengwei Campbell, Bon Ho Bae, Silva Hiti, Sibaprasad Chakrabarti
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Publication number: 20100295500Abstract: Methods and systems are provided for producing a commanded torque in an electric motor in a vehicle. A method comprises obtaining a torque command, obtaining a speed of the electric motor, and operating the inverter based at least in part on a voltage command that corresponds to minimal current through the electric motor for producing the commanded torque at the instantaneous speed of the electric motor.Type: ApplicationFiled: May 22, 2009Publication date: November 25, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: SIBAPRASAD CHAKRABARTI, MENGWEI CAMPBELL