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：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.