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公开(公告)号：US20200247389A1
公开(公告)日：2020-08-06
申请号：US16266799
申请日：2019-02-04
Applicant: GM Global Technology Operations LLC
Inventor： Caleb W. Secrest
Abstract: A method for controlling an electric machine in a powertrain system in which a driven load is connected to a rotor of the electric machine includes measuring phase currents at a starting point of a sample period using current sensors connected to phase windings of the electric machine. The individual phase currents also are determined at a midpoint of the previous sample period. An angular position of the rotor is determined at the starting point and previous midpoint before calculating synchronous reference frame currents of the electric machine at the starting and previous midpoint using the phase currents and angular position. The method includes calculating average synchronous reference frame currents over the sample period and regulating operation of the electric machine using the average. An electrical system includes the electric machine, a power inverter module, and a controller that executes the method.
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公开(公告)号：US20190260319A1
公开(公告)日：2019-08-22
申请号：US15900828
申请日：2018-02-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Brent S. Gagas , Dwarakanath V. Simili , Caleb W. Secrest
Abstract: A current regulator is provided for an electric machine drive system for driving an electric machine. The current regulator includes an adjustable damping module that has a value of virtual damping resistance that is applied at the current regulator. The value of virtual damping resistance is adjustable as a function of sampling frequency. A controller can control the current regulator by determining whether the sampling frequency has changed since a previous execution cycle of the current regulator, and when the sampling frequency has changed since the previous execution cycle, the controller can modify the damping value as a function of the sampling frequency to allow the damping value to change with the sampling frequency. The damping value has a new value of virtual damping resistance that is applied at the current regulator after modifying the damping value. The controller can then execute the current regulator in accordance with the modified damping value to generate the voltage commands.
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公开(公告)号：US10326390B2
公开(公告)日：2019-06-18
申请号：US15658132
申请日：2017-07-24
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David S. Ochs , Yo Chan Son , Caleb W. Secrest
Abstract: Systems and method for operating motors are provided. In an exemplary embodiment, a method for operating a motor includes receiving a first output corresponding to a motor angular position. The method further includes synthesizing a synthesized second output from the first output and from an estimated motor angular velocity. The method also includes calculating the motor angular position from the first output and the synthesized second output. The method includes estimating the motor angular velocity from the motor angular position. Further, the method includes operating the motor to produce torque based on the motor angular position and the motor angular velocity.
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公开(公告)号：US10156462B2
公开(公告)日：2018-12-18
申请号：US15344743
申请日：2016-11-07
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David S. Ochs , Caleb W. Secrest , Yo Chan Son
Abstract: A system includes a rotary device, a vector-based position sensor outputting raw sine and cosine signals indicative of an angular position of the rotary device, and a controller. The controller executes a method by receiving the raw sine and cosine signals from the sensor, generating corrected sine and cosine signals by applying an amplitude error input signal to a first integrator block using a first predetermined trigonometric relationship, and executing a control action for the rotary device via output signals using the corrected signals. The first predetermined trigonometric relationship is SC2−CC2, with SC and CC being the respective corrected sine and cosine signals. The controller may use a second predetermined trigonometric relationship, SC·CC, to apply an orthogonality error input signal to a second integrator block.
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公开(公告)号：US10396696B1
公开(公告)日：2019-08-27
申请号：US15900828
申请日：2018-02-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Brent S. Gagas , Dwarakanath V. Simili , Caleb W. Secrest
Abstract: A current regulator is provided for an electric machine drive system for driving an electric machine. The current regulator includes an adjustable damping module that has a value of virtual damping resistance that is applied at the current regulator. The value of virtual damping resistance is adjustable as a function of sampling frequency. A controller can control the current regulator by determining whether the sampling frequency has changed since a previous execution cycle of the current regulator, and when the sampling frequency has changed since the previous execution cycle, the controller can modify the damping value as a function of the sampling frequency to allow the damping value to change with the sampling frequency. The damping value has a new value of virtual damping resistance that is applied at the current regulator after modifying the damping value. The controller can then execute the current regulator in accordance with the modified damping value to generate the voltage commands.
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Patent Agency Ranking
公开(公告)号：US20180128658A1
公开(公告)日：2018-05-10
申请号：US15344743
申请日：2016-11-07
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David S. Ochs , Caleb W. Secrest , Yo Chan Son
CPC classification number: G01D18/002 , G01D5/16 , G01D5/208 , G01D5/2448
Abstract: A system includes a rotary device, a vector-based position sensor outputting raw sine and cosine signals indicative of an angular position of the rotary device, and a controller. The controller executes a method by receiving the raw sine and cosine signals from the sensor, generating corrected sine and cosine signals by applying an amplitude error input signal to a first integrator block using a first predetermined trigonometric relationship, and executing a control action for the rotary device via output signals using the corrected signals. The first predetermined trigonometric relationship is SC2-CC2, with SC and CC being the respective corrected sine and cosine signals. The controller may use a second predetermined trigonometric relationship, SC·CC, to apply an orthogonality error input signal to a second integrator block.
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7.发明授权公开(公告)号：US10319360B1
公开(公告)日：2019-06-11
申请号：US15913412
申请日：2018-03-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Song He , Yo Chan Son , Gilsu Choi , Caleb W. Secrest , Aja Anjilivelil , Scott M. Reilly , John P. Miller
IPC: G10K11/175
Abstract: In various embodiments, methods, systems, and vehicles are provided for masking a tonal noise of a motor. In certain embodiments, a vehicle includes a drive system and an active masking acoustic signal generator (AMAG). The drive system includes a motor generating a tonal noise. The AMAG is configured to at least facilitate masking the tonal noise, by introducing a complementary harmonic tone, injecting dithering into the motor, or both.
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8.发明申请公开(公告)号：US20190031046A1
公开(公告)日：2019-01-31
申请号：US15659209
申请日：2017-07-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Caleb W. Secrest , David S. Ochs
Abstract: A rotary system includes a rotor, a vector-based position sensor, and a controller executing a method to eliminate fundamental harmonic position measurement error. The sensor measures angular position of the rotor and outputs raw sine and cosine signals representative of the angular position. The raw signals have a fundamental harmonic position measurement error at the frequency of the sensor signals. The controller receives the raw signals, adaptively adds or subtracts sensor signal offsets to or from the raw signals to generate offset sine and cosine signals, calculates a corrected position of the rotor using the offset sine and cosine signals eliminating the fundamental error, and controls an action or state of the rotary system using the corrected position. The rotor may be part of an electric machine, such as in a vehicle.
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公开(公告)号：US10889285B2
公开(公告)日：2021-01-12
申请号：US16266799
申请日：2019-02-04
Applicant: GM Global Technology Operations LLC
Inventor： Caleb W. Secrest
Abstract: A method for controlling an electric machine in a powertrain system in which a driven load is connected to a rotor of the electric machine includes measuring phase currents at a starting point of a sample period using current sensors connected to phase windings of the electric machine. The individual phase currents also are determined at a midpoint of the previous sample period. An angular position of the rotor is determined at the starting point and previous midpoint before calculating synchronous reference frame currents of the electric machine at the starting and previous midpoint using the phase currents and angular position. The method includes calculating average synchronous reference frame currents over the sample period and regulating operation of the electric machine using the average. An electrical system includes the electric machine, a power inverter module, and a controller that executes the method.
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10.发明授权公开(公告)号：US10668822B2
公开(公告)日：2020-06-02
申请号：US15659209
申请日：2017-07-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Caleb W. Secrest , David S. Ochs
Abstract: A rotary system includes a rotor, a vector-based position sensor, and a controller executing a method to eliminate fundamental harmonic position measurement error. The sensor measures angular position of the rotor and outputs raw sine and cosine signals representative of the angular position. The raw signals have a fundamental harmonic position measurement error at the frequency of the sensor signals. The controller receives the raw signals, adaptively adds or subtracts sensor signal offsets to or from the raw signals to generate offset sine and cosine signals, calculates a corrected position of the rotor using the offset sine and cosine signals eliminating the fundamental error, and controls an action or state of the rotary system using the corrected position. The rotor may be part of an electric machine, such as in a vehicle.
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