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公开(公告)号：US11611304B1
公开(公告)日：2023-03-21
申请号：US17685884
申请日：2022-03-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Jeffrey S. Piasecki , Brian A. Welchko , Anno Yoo
Abstract: A propulsion system for a device includes an electric motor configured to generate torque to propel the device. The electric motor includes a stator and a rotor with one or more permanent magnets. A controller is in communication with the electric motor and has recorded instructions for a method for minimizing demagnetization in the one or more permanent magnets. The controller is adapted to select a starting point and an intermediate point on a current trajectory in a stator current graph. The controller is adapted to obtain a final point on the stator current trajectory based on a comparison of the intermediate point and a predetermined voltage limit. A demagnetized torque capability is generated based on the final point on the current trajectory.
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22.发明授权公开(公告)号：US11264936B2
公开(公告)日：2022-03-01
申请号：US16589594
申请日：2019-10-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Anno Yoo , Daniel J. Berry , Young J. Kim
Abstract: A method, system, and apparatus for controlling and regulating operation of a permanent magnet rotary electric machine including a stator and a rotor includes determining a first reactive power term associated with the electric machine based upon voltage, and determining a second reactive power term associated with the electric machine based upon flux. A first motor temperature associated with the electric machine is determined based upon the first and second reactive power terms, and power output from the permanent magnet electric machine is controlled based upon the first motor temperature.
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公开(公告)号：US11209291B2
公开(公告)日：2021-12-28
申请号：US16506387
申请日：2019-07-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Young Joo Lee , Anno Yoo , Milan A. Vadera , Daniel J. Berry
Abstract: A resolver disposed to monitor a rotatable member is described, along with an associated method for evaluating an output signal therefrom. The method for monitoring the resolver includes supplying an excitation signal to the resolver, and monitoring, at an oversampling rate, first and second output signals from the resolver. An oversampling routine is executed to determine averages of the first and second output signals from the resolver. A demodulation angle error is determined based upon the first and second output signals from the resolver, and provided as feedback. A position of the resolver is also determined based upon the first and second output signals from the resolver.
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公开(公告)号：US20210067075A1
公开(公告)日：2021-03-04
申请号：US16559742
申请日：2019-09-04
Inventor： Daniel J. Berry , Anno Yoo , Seung Ki Sul , Hyun-Sam Jung
Abstract: A method for estimating a magnet temperature of a rotor magnet within a rotary electric machine includes, while a rotor of the electric machine is stationary, injecting a high-frequency voltage component onto a control voltage of the electric machine, via a controller, to generate an adjusted voltage command, and extracting a high-frequency component of a resulting current as an extracted high-frequency component. The method also includes calculating an inductance value of the electric machine using the extracted high-frequency component of the resulting current. The magnet temperature is estimated using the calculated inductance value and an angular position of the rotor. The method includes controlling an operation of the electric machine using the estimated magnet temperature. An electric powertrain uses the electric machine and controller noted above.
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公开(公告)号：US10601348B2
公开(公告)日：2020-03-24
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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Patent Agency Ranking
26.发明申请公开(公告)号：US20190288625A1
公开(公告)日：2019-09-19
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：US20180302018A1
公开(公告)日：2018-10-18
申请号：US15485293
申请日：2017-04-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Anno Yoo , Sung-Yoon Jung
IPC: H02P27/08
CPC classification number: H02P27/08 , H02M7/53875
Abstract: A method of controlling an alternating current (AC) motor includes following steps: (a) providing a voltage to the AC motor, wherein the voltage is a pulse-width modulation (PWM) signal, which is represented by a voltage reference vector; (b) determining that the voltage reference vector is in a distortion region; and (c) in response to determining that the voltage reference vector is in the distortion region, modifying, via a controller, the PWM signal by updating the voltage reference vector every half switching period to avoid the distortion region.
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28.发明授权公开(公告)号：US11611305B2
公开(公告)日：2023-03-21
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：US20200228049A1
公开(公告)日：2020-07-16
申请号：US16245402
申请日：2019-01-11
Applicant: GM Global Technology Operations LLC
Inventor： Anno Yoo , Yo Chan Son , Dwarakanath V. Simili
Abstract: An electric motor control system of a vehicle includes a temperature module configured to, based on a motor torque request, (i) determine a plurality of stator current values based on a plurality of temperatures and (ii) generate a maximum stator current based on a lowest value of the plurality of stator current values. A torque module configured to, based on the maximum stator current, the motor torque request, and a maximum allowable flux, generate a maximum torque output. A current command module configured to, based on a speed of a rotor of the electric motor and the maximum torque output, generate a d-axis current adjustment and a q-axis current adjustment. A switching control module configured to, based on the d- and q-axis current adjustments, control switching of an inverter module and apply power to stator windings of the electric motor from an energy storage device.
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公开(公告)号：US10333448B2
公开(公告)日：2019-06-25
申请号：US15482935
申请日：2017-04-10
Applicant: GM Global Technology Operations LLC
Inventor： Anno Yoo , Yo Chan Son , Sangyeop Kwak
Abstract: An electric motor control system of a vehicle includes a current command module configured to, based on a motor torque request for an electric motor of the vehicle, generate a first d-axis current command for the electric motor and a first q-axis current command for the electric motor. An adjustment module is configured to, based on a speed of a rotor of the electric motor and the motor torque request, selectively determine at least one of a d-axis current adjustment and a q-axis current adjustment based on a temperature of the rotor of the electric motor. An adjusting module is configured to produce a second d-axis current command for the electric motor by adjusting the first d-axis current command based on the d-axis current adjustment and to produce a second q-axis current command for the electric motor by adjusting the first q-axis current command based on the q-axis current adjustment.
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