公开(公告)号：US20220416713A1

公开(公告)日：2022-12-29

申请号：US17358147

申请日：2021-06-25

Applicant: Texas Instruments Incorporated

Inventor： Prasad KULKARNI

IPC: H02P27/16 ,  H02M1/12 ,  H02P27/14

Abstract: A motor controller integrated circuit (IC) includes a storage device containing software. The IC also includes a processor core coupled to the storage device. The processor core has an output adapted to be coupled to a motor. The processor core is configured to execute the software to implement a resonant controller at a frequency that is a harmonic of a speed of a motor.

公开(公告)号：US20230134551A1

公开(公告)日：2023-05-04

申请号：US17514804

申请日：2021-10-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Prasad KULKARNI ,  Sameer Pradeep KULKARNI ,  Krushal SHAH

IPC: 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.

公开(公告)号：US20240380343A1

公开(公告)日：2024-11-14

申请号：US18496357

申请日：2023-10-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vikram Dilip DANGE ,  Venkata Naresh KOTIKELAPUDI ,  Prasad KULKARNI

IPC: H02P7/00

Abstract: In some examples, an apparatus includes a filter having first and second inputs, a current signal input, and an output. The apparatus also includes a speed observer having a voltage signal input, a current signal input, and an output, the output of the speed observer coupled to the second input of the filter. The apparatus also includes a ripple counter having an input and an output, the input of the ripple counter coupled to the output of the filter. The apparatus also includes a ripple processor having first and second inputs, and an output, the first input of the ripple processor coupled to the output of the ripple counter, the second input of the ripple processor coupled to the output of the speed observer, and the output of the ripple processor coupled to the first input of the filter.

公开(公告)号：US20240007035A1

公开(公告)日：2024-01-04

申请号：US17852921

申请日：2022-06-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sameer KULKARNI ,  Prasad KULKARNI ,  Ganapathi HEGDE

IPC: H02P21/18 ,  H02P21/22

CPC classification number: H02P21/18 ,  H02P21/22

Abstract: A motor controller adapted to be coupled to a motor having a rotor. The motor controller includes a storage device containing software. The motor controller also includes a processor core coupled to the storage device and adapted to be coupled to the motor. The processor core is configured to operate the motor in an open-loop control in response to determining a speed of the rotor determined based on an inverse exponential function with respect to time.

公开(公告)号：US20230065597A1

公开(公告)日：2023-03-02

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: 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.

公开(公告)号：US20230006576A1

公开(公告)日：2023-01-05

申请号：US17364540

申请日：2021-06-30

Applicant: Texas Instruments Incorporated

Inventor： Prasad KULKARNI ,  Venkata Pavan MAHANKALI ,  Ganapathi HEGDE

IPC: H02P6/182 ,  H02P21/10 ,  H02P21/18 ,  H02P21/00 ,  H02P21/22 ,  H02P27/06

Abstract: A motor controller integrated circuit (IC) includes a storage device containing software, and a processor core. The processor core has an output adapted to be coupled to a motor. The processor core is configured to execute the software to operate the motor in an open-loop control, calculate first and second orthogonal components of a back electromotive force (BEMF), calculate a total BEMF value, and determine that the first orthogonal component is within a threshold of the total BEMF value. The processor core is further configured to, responsive to the first orthogonal component being within the threshold of the total BEMF value, operate the motor in a closed-loop control.