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公开(公告)号：US12149195B2
公开(公告)日：2024-11-19
申请号：US18087935
申请日：2022-12-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Kerrie M. Spaven , Brent S. Gagas , Brian J. Gallert , Brian A. Welchko
IPC: H02P27/08 , H02M1/12 , H02M1/14 , H02M7/5395
Abstract: The concepts described herein provide a method, apparatus, and system for controlling an inverter by modifying duty cycles of the PWM control signals in a manner that achieves a minimum duration between consecutive switching events in the inverter, which serves to reduce common mode current in the bearing(s) of an attached rotary electric machine. To minimize the effect of additional current and voltage ripple into the system, the minimum switching duration is defined in relation to a modulation index and geometric location near the sector boundaries of the respective inverter voltage space vector diagram.
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公开(公告)号：US12005808B2
公开(公告)日：2024-06-11
申请号：US17318949
申请日：2021-05-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Shiming Duan , Yiran Hu , Shifang Li , Brent S. Gagas
CPC classification number: B60L58/16 , B60L58/12 , B60L2240/423 , B60L2240/429 , B60L2240/547 , B60L2240/549 , B60L2260/167
Abstract: A diagnostic system for a vehicle includes a vehicle system configured to operate the vehicle in a normal operating mode and a boosted mode. In the boosted mode, the vehicle system increases at least one of a maximum motor torque, a maximum engine torque, and a maximum battery power available to the vehicle. A wear estimation module is configured to collect wear data associated with a component of the vehicle while being operated in the boosted mode, estimate, based on the collected wear data, wear of the component caused by being operated in the boosted mode, and generate a prediction of a remaining lifetime of the component based on the estimated wear of the component.
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公开(公告)号：US11926221B2
公开(公告)日：2024-03-12
申请号：US17031052
申请日：2020-09-24
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Xin Jing , Bojian Cao , Brent S. Gagas
IPC: H02P25/10 , B60L15/02 , B60W30/188 , H02P21/20
CPC classification number: B60L15/025 , B60W30/188 , H02P21/20 , B60L2240/423 , B60L2240/429 , B60W2510/083 , B60W2510/085 , B60W2520/40
Abstract: A method for controlling transient operation of a variable flux machine (VFM) includes, during a shunt angle transition, receiving a commanded and measured shunt angle when operating in a predetermined operating region, e.g., maximum torque per ampere or field weakening. The method includes calculating d-axis and q-axis delta current terms (ΔId and ΔIq) required to maintain an output torque level of the VFM through a duration of the shunt angle transition, then applying the required ΔId and ΔId terms as feed-forward terms to adjust a d-axis current (Id) term and a q-axis current (Iq) term from a respective lookup table. In this manner the controller maintains the output torque level of the VFM during the shunt angle transition. An electric powertrain includes the VFM, a TPIM, and the controller. A PM machine may be controlled by substituting temperature for shunt angle.
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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：US11509253B2
公开(公告)日：2022-11-22
申请号：US17185365
申请日：2021-02-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Kerrie M. Spaven , Brent S. Gagas , Brian A. Welchko
Abstract: An electric drive system includes a rechargeable energy storage unit, a power inverter, an electric motor and a controller having a processor and tangible, non-transitory memory on which instructions are recorded. A transfer of electrical power between the rechargeable energy storage unit and the electric motor is governed by a pulse width modulation (PWM) switching frequency. The controller is configured to determine a current switching frequency based in part on a PWM type, a PWM switching frequency style and an inverter direct current voltage. A PWM scalar is determined based in part on the current switching frequency and a maximum value of a control reference frequency. The controller is configured to transmit a command signal to regulate the transfer of electrical power based in part on the PWM scalar, the PWM switching frequency being proportional to a product of the PWM scalar and the control reference frequency.
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Patent Agency Ranking
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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公开(公告)号：US20240396488A1
公开(公告)日：2024-11-28
申请号：US18792789
申请日：2024-08-02
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Tanvi Nagarale , Brent S. Gagas , Brian A. Welchko
Abstract: A control system for a rotary electric machine includes an inverter including a plurality of power switches, a heat exchanger, first temperature sensors arranged to monitor the power switches, a second temperature sensor arranged to monitor the heat exchanger, and a controller. An expected power loss is determined based upon electric current, switching functions, and electrical characteristics of the power switches. A plurality of power capacity terms are determined based upon the expected power loss in the inverter, the temperatures of the power switches, and the temperature of the heat exchanger. The inverter is controlled based upon the aforementioned power capacities.
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公开(公告)号：US12126293B2
公开(公告)日：2024-10-22
申请号：US17971851
申请日：2022-10-24
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Tanvi Nagarale , Brent S. Gagas , Brian A. Welchko
Abstract: A control system for a rotary electric machine includes an inverter including a plurality of power switches, a heat exchanger, first temperature sensors arranged to monitor the power switches, a second temperature sensor arranged to monitor the heat exchanger, and a controller. An expected power loss is determined based upon electric current, switching functions, and electrical characteristics of the power switches. A plurality of power capacity terms are determined based upon the expected power loss in the inverter, the temperatures of the power switches, and the temperature of the heat exchanger. The inverter is controlled based upon the aforementioned power capacities.
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公开(公告)号：US20240072709A1
公开(公告)日：2024-02-29
申请号：US18087935
申请日：2022-12-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Kerrie M. Spaven , Brent S. Gagas , Brian J. Gallert , Brian A. Welchko
IPC: H02P27/08 , H02M1/12 , H02M1/14 , H02M7/5395
CPC classification number: H02P27/08 , H02M1/123 , H02M1/143 , H02M7/5395
Abstract: The concepts described herein provide a method, apparatus, and system for controlling an inverter by modifying duty cycles of the PWM control signals in a manner that achieves a minimum duration between consecutive switching events in the inverter, which serves to reduce common mode current in the bearing(s) of an attached rotary electric machine. To minimize the effect of additional current and voltage ripple into the system, the minimum switching duration is defined in relation to a modulation index and geometric location near the sector boundaries of the respective inverter voltage space vector diagram.
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公开(公告)号：US20220271697A1
公开(公告)日：2022-08-25
申请号：US17185365
申请日：2021-02-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Kerrie M. Spaven , Brent S. Gagas , Brian A. Welchko
Abstract: An electric drive system includes a rechargeable energy storage unit, a power inverter, an electric motor and a controller having a processor and tangible, non-transitory memory on which instructions are recorded. A transfer of electrical power between the rechargeable energy storage unit and the electric motor is governed by a pulse width modulation (PWM) switching frequency. The controller is configured to determine a current switching frequency based in part on a PWM type, a PWM switching frequency style and an inverter direct current voltage. A PWM scalar is determined based in part on the current switching frequency and a maximum value of a control reference frequency. The controller is configured to transmit a command signal to regulate the transfer of electrical power based in part on the PWM scalar, the PWM switching frequency being proportional to a product of the PWM scalar and the control reference frequency.
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