公开(公告)号：US20230268855A1

公开(公告)日：2023-08-24

申请号：US17676610

申请日：2022-02-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Venkata Naresh KOTIKELAPUDI ,  Laxman SREEKUMAR ,  Anand YADAV

IPC: H02P8/38 ,  H02P8/12

CPC classification number: H02P8/38 ,  H02P8/12

Abstract: In accordance with at least one example of the description, a circuit is adapted to be coupled to a coil of a motor via an H-bridge circuit. The circuit includes a duty sensor, a subtractor, and a comparator. The duty sensor is coupled to the coil of the motor and is configured to provide raw run duty data responsive to a coil current through the coil. The subtractor is coupled to the duty sensor and is configured to provide a differential duty signal responsive to a stall duty signal and a run duty signal obtained using the raw run duty data. The comparator is coupled to the subtractor and is configured to provide a stall signal indicative of a stall condition for the motor responsive to the differential duty signal and a threshold value.

公开(公告)号：US20230097035A1

公开(公告)日：2023-03-30

申请号：US17489269

申请日：2021-09-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Venkata Naresh KOTIKELAPUDI ,  Ganapathi Shankar KRISHNAMURTHY ,  Laxman SREEKUMAR ,  Siddhartha GOPAL KRISHNA

IPC: H02P8/12 ,  H02P8/34 ,  H02P7/03 ,  G01R19/165 ,  H03K5/24

Abstract: A method for controlling a stepper motor includes calculating a duty cycle of a current provided to the stepper motor and comparing a difference, between the calculated duty cycle and a base duty cycle of current provided to the stepper motor under a base load condition, to a reference duty cycle value. The method also includes adjusting a peak current level of the current provided to the stepper motor responsive to the comparison.