公开(公告)号：US09628006B2

公开(公告)日：2017-04-18

申请号：US14613937

申请日：2015-02-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： David Hernandez ,  Gregory Charles Amidon ,  David John Baldwin ,  Brandon J. Beckham

IPC: H02P7/00

CPC classification number: H02P7/0094

Abstract: An apparatus includes a motor driver configured to drive a motor across a pair of input terminals to the motor and a current sense unit configured to sense the motor's electrical current amplitude. Further, an angular frequency extractor is operatively coupled to the motor driver and the current sense unit and configured to detect discontinuities in the motor's electrical current amplitude. The angular frequency extractor also is configured to determine a time period for one complete revolution of a rotor of the motor and to generate a feedback signal based on the determined period to control an angular frequency of the motor. The feedback signal may be used to adjust how the motor is being driven (e.g., to slow the motor down or speed it up).