Invention Grant
- Patent Title: Current regulation in motors
-
Application No.: US14689507Application Date: 2015-04-17
-
Publication No.: US09742329B2Publication Date: 2017-08-22
- Inventor: Sudhir Nagaraj , Anuj Jain
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Lawrence J. Bassuk; Charles A. Brill; Frank D. Cimino
- Main IPC: H02P8/00
- IPC: H02P8/00 ; G05B19/40 ; H02P7/29 ; H02P8/22 ; H02P8/12

Abstract:
A motor controller that includes a processing device and a drive circuit. The drive circuit may include a plurality of switches, a motor winding, and a current sensor coupled together in an H-bridge configuration. The processing device is configured to cause a drive current to drive through the motor winding for a minimum amount of time. The processing device is also configured to compare the current through the current sensor to a threshold value at the minimum amount of time. The processing device is also configured to, based on the current being at or above the threshold value at the minimum amount of time, stop the drive current for an off period of time and cause a first decay of the current for a first percentage of the off period of time and a first slow decay for a second percentage of the off period of time.
Public/Granted literature
- US20150303850A1 CURRENT REGULATION IN MOTORS Public/Granted day:2015-10-22
Information query