Wen Ting Lin

US Patent:

20200266740, Aug 20, 2020

Filed:

May 8, 2020

Appl. No.:

16/869617

Inventors:

- Dallas TX, US
Rakesh Raja - Allen TX, US
Wen Pin Lin - Allen TX, US
Sudhir Nagaraj - Dallas TX, US

International Classification:

H02P 8/38
H02P 8/34
H02P 8/12

Abstract:

In one embodiment, a method includes detecting, by a stall detection sensor in a driver coupled to a stepper motor, a first set of time-off periods in a rising commutation phase of motor current during current regulation. The stall detection sensor further detects a second set of time-off periods in a falling commutation phase of motor current during current regulation. Next, the stall detection sensor compares the first set of time-off periods with the second set of time-off periods and determines whether the stepper motor is stalled based on the comparison of the first set of time-off periods with the second set of time-off periods.