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    Motor controller and a method for controlling a motor
    1.
    发明授权
    Motor controller and a method for controlling a motor 有权

    公开(公告)号：US12212270B2

    公开(公告)日：2025-01-28

    申请号：US17369000

    申请日：2021-07-07

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sameer Pradeep Kulkarni ,  Prasad Kulkarni ,  Ganapathi Hegde

    IPC: H02K29/12 ,  H02P6/182 ,  H02P6/28

    Abstract: A motor controller that is operable to control a motor includes drive current generation circuitry having an output coupled to the motor. The motor controller further includes a velocity control path. The velocity control path includes angular velocity estimation circuitry having an input adapted to be coupled to the motor, a velocity comparator having first input coupled to a target velocity input and a second input coupled to an output of the angular velocity estimation circuitry, and an adaptive velocity controller having a first input coupled to an output of the velocity comparator and having an output coupled to a first input of the drive current generation circuitry. The motor controller further includes controller parameter determination circuitry having a first input coupled to the output of the angular velocity estimation circuitry and having an output coupled to a second input of the adaptive velocity controller.

    Dual window watchdog timer
    3.
    发明授权
    Dual window watchdog timer 有权

    公开(公告)号：US09740236B2

    公开(公告)日：2017-08-22

    申请号：US14982200

    申请日：2015-12-29

    Applicant: Texas Instruments Incorporated

    Inventor： Ganapathi Hegde

    IPC: G06F1/12 ,  G06F1/06

    CPC classification number: G06F1/12 ,  G06F1/06

    Abstract: Systems and methods for a Dual Window Watchdog Timer (DWWDT) are described. In some embodiments, a method may include running a first counter in a first clock domain and a second counter in a second clock domain; generating an interrupt to a controller during a window open period, wherein the window open period begins in response to the first counter having reached a predetermined threshold; and at least one of: restarting the first counter if the controller restarts the second counter in response to the interrupt before the window open period ends; or issuing a system reset if the controller does not restart the second counter in response to the interrupt before the window open period ends.

    DUAL WINDOW WATCHDOG TIMER
    4.
    发明申请
    DUAL WINDOW WATCHDOG TIMER 有权
    双窗口看门狗定时器

    公开(公告)号：US20160266605A1

    公开(公告)日：2016-09-15

    申请号：US14982200

    申请日：2015-12-29

    Applicant: Texas Instruments Incorporated

    Inventor： Ganapathi Hegde

    IPC: G06F1/12

    CPC classification number: G06F1/12 ,  G06F1/06

    Abstract: Systems and methods for a Dual Window Watchdog Timer (DWWDT) are described. In some embodiments, a method may include running a first counter in a first clock domain and a second counter in a second clock domain; generating an interrupt to a controller during a window open period, wherein the window open period begins in response to the first counter having reached a predetermined threshold; and at least one of: restarting the first counter if the controller restarts the second counter in response to the interrupt before the window open period ends; or issuing a system reset if the controller does not restart the second counter in response to the interrupt before the window open period ends.

    Abstract translation: 描述了双窗口看门狗定时器（DWWDT）的系统和方法。 在一些实施例中，一种方法可以包括在第一时钟域中运行第一计数器，在第二时钟域中运行第二计数器; 在窗口打开期间向控制器产生中断，其中所述窗口打开周期响应于所述第一计数器已经达到预定阈值而开始; 以及至少一个：如果在窗口打开期间结束之前控制器响应于中断重新启动第二计数器，则重新启动第一计数器; 或者如果控制器在窗口打开期间结束之前不响应于中断而重新启动第二计数器，则发出系统复位。

    Degauss time detection in electric motors
    6.
    发明授权
    Degauss time detection in electric motors 有权

    公开(公告)号：US11594987B1

    公开(公告)日：2023-02-28

    申请号：US17514171

    申请日：2021-10-29

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Venkata Pavan Mahankali ,  Ganapathi Hegde ,  Krushal Shah

    IPC: H02P6/182 ,  H02P6/21

    Abstract: Example systems and processes compare sampled values of a floating phase voltage and/or outgoing phase current of an electric motor with a corresponding reference to identify a degauss time period. Post degauss time period identification, sampled values are compared with a threshold to identify a settling time period following the degauss time period. The threshold used to identify the settling time period depends on a slope of a floating phase voltage after the degauss time period, a modulation scheme being used, and a pulse width modulation ON/OFF state of the electric motor. When the threshold comparison test is not met, it is determined whether the slope of the floating phase voltage has inverted. Based on such processing, a back-electromotive force (BEMF) zero-crossing (ZC) is detected or estimated with respect to a floating phase voltage of the electric motor.

    Systems and Methods for Regulation of Propagation Delay in DC Motor Drivers
    7.
    发明申请
    Systems and Methods for Regulation of Propagation Delay in DC Motor Drivers 有权

    公开(公告)号：US20230039198A1

    公开(公告)日：2023-02-09

    申请号：US17397133

    申请日：2021-08-09

    Applicant: Texas Instruments Incorporated

    Inventor： Ashish Ojha ,  Krishnamurthy Shankar ,  Siddhartha Gopal Krishna ,  Priyank Anand ,  Ganapathi Hegde

    IPC: H03K17/687 ,  H02P23/00 ,  H03K5/24

    Abstract: A control circuit regulates the propagation delay of a field effect transistor (FET) before the FET transitions to the Miller region by applying a pre-charge current for a fixed duration to the gates of the FET. After the fixed duration, the current is reduced to a lower drive current level which is based on a desired output voltage slew rate. After the FET transitions to the Miller region, the output voltage slews down in accordance with the output voltage slew rate. By regulating the slew-rate of the output voltage in the Miller region and regulating the propagation delay of the FET prior to the Miller region, the control circuit reduces electromagnetic interference (EMI) caused by the switching of the FET, thereby improving electromagnetic compatibility (EMC) of switch mode driver systems without increasing the propagation delay of the FET.

    Inductance-based, high-torque start up of electric motor
    9.
    发明授权
    Inductance-based, high-torque start up of electric motor 有权

    公开(公告)号：US11894795B2

    公开(公告)日：2024-02-06

    申请号：US17731389

    申请日：2022-04-28

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Venkata Pavan Mahankali ,  Prasad Kulkarni ,  Ganapathi Hegde ,  Sameer Kulkarni

    IPC: H02P6/185 ,  H02P6/21 ,  H02P6/18

    CPC classification number: H02P6/21 ,  H02P6/186

    Abstract: Example systems and processes use three-phase vector mutual inductance analysis to detect zero-crossing (ZC) locations of back-electromotive force (BEMF) of an electric motor and to detect its commutation points during start-up or low-speed operation. For each sector of rotation of the rotor, two pairs of three-phase vectors are applied, along with current for the corresponding driving phase. The first pair is alternately applied to move the rotor, and the mutual inductances resulting from such application are compared to detect the zero-crossing (ZC) location in the BEMF of the electric motor in that sector. The second pair is then alternately applied within the same sector to continue to move the rotor, and the mutual inductances from such application are compared to detect the commutation point of the electric motor in that sector. The process may be repeated for each successive sector, changing the driving current at each new sector.

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