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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.

    Motor controller and a method for controlling a motor
    4.
    发明授权
    Motor controller and a method for controlling a motor 有权

    公开(公告)号：US11916496B2

    公开(公告)日：2024-02-27

    申请号：US17363571

    申请日：2021-06-30

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Prasad Kulkarni ,  Venkata Pavan Mahankali

    IPC: H02P21/00 ,  H02P21/18 ,  H02P21/22

    CPC classification number: H02P21/18 ,  H02P21/22 ,  H02P2207/05

    Abstract: A motor controller is operable to control a motor. The motor has a first terminal and the motor controller includes an angular velocity transmission path having an input and an output. A current generator includes a velocity-torque input, an angular position input, and a motor drive output. The velocity-torque input is coupled to the output of the angular velocity transmission path. An angular velocity feedback path is coupled between a first terminal and a first location on the angular velocity transmission path. The first location is between the input and the output of the angular velocity transmission path. A current feedback path is coupled between the first terminal and a second location on the angular velocity transmission path. The second location is disposed between the first location on the angular velocity transmission path and the velocity-torque input of the current generator.

    Inductance-based, high-torque start up of electric motor
    5.
    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.

    Brushless motor control
    9.
    发明授权
    Brushless motor control 有权

    公开(公告)号：US11817805B2

    公开(公告)日：2023-11-14

    申请号：US17514804

    申请日：2021-10-29

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Prasad Kulkarni ,  Sameer Pradeep Kulkarni ,  Krushal Shah

    IPC: H02P21/00 ,  H02P21/22

    CPC classification number: H02P21/22

    Abstract: In some examples, an apparatus operable to drive a motor includes driver circuitry adapted to be coupled to the motor and processing logic coupled to the driver circuitry. The processing logic is operable to determine an expected current for controlling the motor, reduce a reference current upon which the motor is controlled from a first value to a second value at an exponential rate, determine that a measured current of the motor is approximately equal to the expected current, and responsive to determining that the measured current of the motor is approximately equal to the expected current, provide a control signal to the driver circuitry based on the expected current to the motor to control the motor to operate according to closed loop control.

    Resynchronization of brushless DC motors
    10.
    发明授权
    Resynchronization of brushless DC motors 有权

    公开(公告)号：US11728751B2

    公开(公告)日：2023-08-15

    申请号：US17463349

    申请日：2021-08-31

    Applicant: TEXAS INSTRUMENTS INCORPORATED

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

    IPC: H02P25/03 ,  H02P6/182 ,  H02P25/026

    CPC classification number: H02P6/182 ,  H02P25/026 ,  H02P25/03

    Abstract: A controller is adapted to be coupled to a brushless direct current (DC) motor and includes an analog-to-digital converter (ADC), a computing device, and a driver. The ADC is configured to receive an analog back electromotive force (BEMF) waveform from the brushless DC motor and sample the analog BEMF waveform to produce a digital BEMF waveform. The computing device is coupled to the ADC and is configured to receive the digital BEMF waveform and determine a position and a speed of the rotor based on the digital BEMF waveform. The driver is coupled to the ADC and the computing device and is configured to receive the position and the speed of the rotor and provide a drive signal based on the position and the speed of the rotor of the brushless DC motor.

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