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11.发明申请公开(公告)号：US20190049517A1
公开(公告)日：2019-02-14
申请号：US15674804
申请日：2017-08-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Gilsu Choi , Anno Yoo , Dwarakanath V. Simili
Abstract: A method in a motor controller for an electric motor is disclosed. The method includes receiving a motor current measurement, a motor reference voltage or measured voltage, and an estimated temperature from the electric motor, determining a reference flux linkage estimate (λpm,ref) from a lookup table based on the motor current measurement and the estimated temperature, determining a back-EMF (electromotive force) estimate based on the motor current measurement, the motor voltage and the estimated temperature, determining an observed flux linkage estimate (λpm,obs) from the back-EMF estimate, determining a magnetic strength as a ratio of the observed flux linkage estimate to the reference flux linkage estimate, and determining that a rotor magnet has been demagnetized to an unacceptable level when the magnetic strength is below a threshold level.
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公开(公告)号：US20250145015A1
公开(公告)日：2025-05-08
申请号：US18504454
申请日：2023-11-08
Applicant: GM Global Technology Operations LLC
Inventor： Anno Yoo , Sangyeop Kwak , Nikhil Deshpande , Brent Steven Gagas , Vinod Chowdary Peddi
Abstract: A system performs a method for operating a vehicle. A cable is attached between an inverter of the vehicle and a motor of the vehicle, the cable having a resistance. The inverter is operated using a first direct current (DC) reference voltage. A processor obtains a current from the motor, calculates a power factor at the inverter, obtains a resistance of the cable, determines a voltage drop between the inverter and the motor from the current, the resistance and the power factor due to a presence of the cable, determines a DC compensation voltage from the voltage drop, and adjusts the first DC reference voltage to a second DC reference voltage using the DC compensation voltage.
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13.发明申请公开(公告)号：US20250112582A1
公开(公告)日：2025-04-03
申请号：US18479365
申请日：2023-10-02
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Anno Yoo , Cheng Gong
Abstract: Methods, systems, and vehicles are provided for determining a stator resistance value of an electric motor. The systems may include the electric motor including a stator and a rotor; a sensor system including configured to generate sensor data indicative of sensed operating conditions of the electric motor including a current magnitude, a current angle, a motor speed, a temperature of the stator, and a temperature of the rotor; and a controller operably coupled with the sensor system and the electric motor. The controller is configured to: determine an initial stator resistance value based on a stator reference temperature and either estimated data sensor data received from the sensor system; determine a stator temperature coefficient based on the sensor data and a stator nonlinear resistance ratio curve; and determine the stator resistance value based on the initial stator resistance value and the stator temperature coefficient.
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14.发明申请公开(公告)号：US20220131490A1
公开(公告)日：2022-04-28
申请号：US17078346
申请日：2020-10-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Vinod Chowdary Peddi , Anno Yoo , Brent S. Gagas , Song He
Abstract: A method for controlling operation of a rotary electric machine includes receiving, via a bandwidth-partitioning harmonic compensation regulator (HCR) of a controller, a commanded torque and rotational speed of the electric machine, and calculating, via the HCR in response to enabling conditions, a dq harmonic compensation current and a dq harmonic compensation voltage for one or more predetermined harmonic orders using the commanded torque and the rotational speed. The harmonic compensation current and voltage cancel torque ripple and current ripple in the one or more predetermined harmonic orders. The method may include injecting an acoustic tone at a predetermined harmonic order. The method additionally includes adding the dq harmonic compensation current and voltage to a dq current and voltage command, respectively, to generate adjusted dq current and voltage commands. The electric machine is then controlled using the adjusted dq current and voltage commands.
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公开(公告)号：US20210021219A1
公开(公告)日：2021-01-21
申请号：US16515695
申请日：2019-07-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Siddharth Ballal , Anno Yoo
Abstract: A propulsion system having an electric motor and corresponding method. A controller is configured to receive a torque request and selectively command the electric motor. The controller has a processor and tangible, non-transitory memory on which instructions are recorded for a method of generating an auxiliary power. The controller is configured to obtain a desired auxiliary power and a delta factor (δ). The delta factor is set as a speed modifier (Δω=δ) when the cosine of an angle (θ), between a constant torque unit vector and a decreasing voltage ellipse unit vector, is less than a predefined threshold. A modified rotor speed is obtained as a sum of an original rotor speed and a speed modifier (Δω).The controller is configured to obtain modified stator current commands based on the modified rotor speed and torque request. The auxiliary power is generated by commanding the modified stator current commands.
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Patent Agency Ranking
公开(公告)号：US10461678B2
公开(公告)日：2019-10-29
申请号：US15924823
申请日：2018-03-19
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Anno Yoo , Siddharth Ballal
Abstract: Methods and systems for applying adaptive thermal compensation when operating a rotor of a motor are provided. The method includes: receiving a plurality of parameter data of torque and temperature of the rotor and current and voltage of the motor by a region determination module; calculating, by the region determination module from the set of parameter data, a cosine value to determine a region for applying the adaptive thermal compensation wherein the cosine value is calculated from a constant torque direction vector and a voltage limit eclipse vector derived from a functional relationship of the one or more parameter data; and applying, by a reference modification module, a modification value to incrementally modify the motor current when the motor is operating within the region determined by the region determination module for the adaptive thermal compensation.
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公开(公告)号：US20190229653A1
公开(公告)日：2019-07-25
申请号：US15879633
申请日：2018-01-25
Applicant: GM Global Technology Operations LLC
Inventor： David S. OCHS , Anno Yoo , Kibok Lee
Abstract: A switching module switches between receiving a first output from a sensor and a second output from a sensor-less position detection module each indicating a rotor position error of a motor. A position determining module determines a rotor position of the motor based on an output of the switching module and generates a control signal to control a parameter of the motor. A sample and hold module operates on a sum of the output of the switching module and an output of the sample and hold module from a prior instance of switching between the first and second outputs. The position determining module scales the output of the sample and hold module using first and second gains to generate first and second scaled outputs, and generates the control signal based on the output of the switching module and the first and second scaled outputs.
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公开(公告)号：US20230347744A1
公开(公告)日：2023-11-02
申请号：US17731988
申请日：2022-04-28
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael Duncan Swartz , Young Joo Lee , Brian J. Gallert , Anno Yoo
CPC classification number: B60L3/0061 , G01P3/44 , G01D5/24485 , B60L2240/12
Abstract: A method and system are contemplated for determining a final speed and position of a motor used in an electric vehicle. The final speed and position is calculated as a function of a sensed position when a resolver of a position system is available and as a function of a sensorless position when the resolver is unavailable.
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公开(公告)号：US20230331094A1
公开(公告)日：2023-10-19
申请号：US17719819
申请日：2022-04-13
Inventor： Anno Yoo , Seung-Ki Sul , Hyung-June Cho
Abstract: A propulsion system for a device includes an electric motor configured to generate torque to propel the device. A position sensor is adapted to determine a rotor position of the electric motor. The system includes a controller having instructions recorded for determining the rotor position when a sensor fault condition is detected. The controller is adapted to selectively command injection of a voltage signal in a direct magnetic axis in a synchronous reference frame when a motor speed of the electric motor is below a predefined motor speed threshold and the sensor fault condition is detected. The rotor position is estimated based in part on a motor current response to the voltage signal. The voltage signal is defined by an alternating periodic shape having respective constant segments in each of a plurality of control periods, the respective constant segments being discontinuous between the control periods.
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公开(公告)号：US11752878B2
公开(公告)日：2023-09-12
申请号：US17034445
申请日：2020-09-28
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Min-Joong Kim , Debanjan Deep , Jinming Liu , Anno Yoo , Daniel J. Berry
CPC classification number: B60L15/20 , B60K1/02 , B60K1/04 , B60L7/10 , B60L53/20 , B60R16/03 , G07C5/0808 , B60L1/003
Abstract: A vehicle is described that includes a multi-mode powertrain system having a first drive unit and a second drive unit. A controller is arranged to monitor the high-voltage DC power bus and is in communication with and operatively connected to first and second inverters. The controller is able to detect operation of one of the first inverter or the second inverter in an uncontrolled generating (UCG) mode, determine a driveline torque associated with the operating of the one of the first inverter or the second inverter in the UCG mode, and determine a compensating torque that is needed to counteract the driveline torque associated with the operating of the one of the first inverter or the second inverter in the UCG mode. The controller can further operate to detect a fault that may induce unintended lateral motion (ULM), and control torque outputs of the inverters based thereon.
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