Method and apparatus for high speed stepper motor stall...

Details Method and apparatus for high speed stepper motor stall... Method and apparatus for high speed stepper motor stall...

2008-01-03

2010-10-12

Masih, Karen (Department: 2837)

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

C318S696000, C318S282000

Reexamination Certificate

active

07812562

ABSTRACT:
A detector device and a method for detecting a stall condition in a stepper motor, wherein the accumulated value of the back EMF is compared to a stall threshold when the stepper motor has exceeded a pre-determined rotational velocity threshold, the accumulated value of the back EMF representing a condition of the stepper motor, specifically a failure of the accumulated back EMF value to exceed the stall threshold indicating a stall condition of the stepper motor.

REFERENCES:
patent: 4496892 (1985-01-01), Bugatto, Jr.
patent: 6861817 (2005-03-01), Pigott et al.
patent: 7170254 (2007-01-01), Yamada

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