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    OPEN-LOOP CONTROL FOR TRANSIENT OPERATION OF A ROTARY ELECTRIC MACHINE
    3.
    发明申请
    OPEN-LOOP CONTROL FOR TRANSIENT OPERATION OF A ROTARY ELECTRIC MACHINE 有权

    公开(公告)号：US20220089034A1

    公开(公告)日：2022-03-24

    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: B60L15/02 ,  B60W30/188

    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.

    Integrated fault isolation and prognosis system for electric drive system
    4.
    发明授权
    Integrated fault isolation and prognosis system for electric drive system 有权

    公开(公告)号：US11133771B2

    公开(公告)日：2021-09-28

    申请号：US16702877

    申请日：2019-12-04

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jiyu Zhang ,  Siddharth Ballal ,  Lei Hao ,  Wesley G. Zanardelli ,  Bojian Cao ,  Mutasim Salman

    IPC: H02P29/028 ,  B60W10/08 ,  H02P29/024

    Abstract: An electric drive system of a vehicle comprises a motor, a position sensor, an inverter, sensors to sense current and voltage supplied to the motor, and a controller to control the motor by controlling the inverter based on data from the position sensor and the sensors and a torque command. The controller estimates a motor torque using a motor model, calculates the motor torque, and generates a first state of health for the electric drive system based on a difference between the estimated and calculated motor torques. The controller generates, in response to the first state of health being less than or equal to a first threshold, a second state of health for at least one of the position sensor, the sensors, and the motor, and determines whether one of the position sensor, the sensors, and the motor is faulty based on the first and second states of health.

    Systems and methods for detecting stator winding faults and degradation
    7.
    发明授权
    Systems and methods for detecting stator winding faults and degradation 有权

    公开(公告)号：US11489471B2

    公开(公告)日：2022-11-01

    申请号：US16715102

    申请日：2019-12-16

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jiyu Zhang ,  Siddharth Ballal ,  Lei Hao ,  Wesley G. Zanardelli ,  Bojian Cao

    IPC: H02P9/10 ,  H02P27/08 ,  H02P21/22 ,  H02P27/12 ,  H02P21/20 ,  H02P21/18

    Abstract: A diagnostic system includes: a current command module configured to, based on a motor torque request, a motor speed, a direct current (DC) bus voltage, generate a d-axis current command for an electric motor and a q-axis current command for the electric motor; a voltage command module configured to, based on the d-axis current command and the q-axis current command, generate a d-axis voltage command and a q-axis voltage command; a switching control module configured to control switching of an inverter module based on the d-axis voltage command and the q-axis voltage command, where the inverter module is configured to apply power to stator windings of the electric motor from the DC bus; and a fault module configured to selectively indicate that the stator windings of the electric motor are degraded when the d-axis voltage command is less than a predetermined nominal d-axis voltage of the electric motor.

    CLOSED-LOOP CONTROL FOR TRANSIENT OPERATION OF VARIABLE FLUX AND PERMANENT MAGNET ELECTRIC MACHINES
    8.
    发明申请
    CLOSED-LOOP CONTROL FOR TRANSIENT OPERATION OF VARIABLE FLUX AND PERMANENT MAGNET ELECTRIC MACHINES 有权

    公开(公告)号：US20210273505A1

    公开(公告)日：2021-09-02

    申请号：US16806354

    申请日：2020-03-02

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xin Jing ,  Bojian Cao ,  Brent S. Gagas

    IPC: H02K1/27 ,  H02K1/24 ,  H02M7/48

    Abstract: A method for controlling transient operation of a rotary electric machine in an electric powertrain or other electrical system includes, during a shunt angle transition occurring during a maximum torque per ampere (MTPA) control region, determining an estimated output torque of the electric machine via a torque estimation block using d-axis and q-axis current commands and an additional value, i.e., an actual shunt angle or a machine temperature. The method includes subtracting the estimated output torque from a commanded output torque to derive an adjusted commanded torque value or torque error, and calculating, from the torque error, a delta d-axis current command and a delta q-axis current command. The method includes adjusting d-axis and q-axis current commands using the delta commands to produce adjusted d-axis and q-axis current commands, which are then used as closed-loop feedback control terms by the torque estimation block.

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