Stepper motor jam detection circuit

Details Stepper motor jam detection circuit Stepper motor jam detection circuit

H - Electricity

02

P

H02P 8/34 (2006.01) G08B 21/18 (2006.01) H02P 8/36 (2006.01)

Patent

CA 2435754

Methods, devices and circuits for detecting malfunctions in stepper motors. A signal from a driver circuit to a stepper motor that is proportional to the current in the windings of the stepper motor is detected. This signal is then amplified and integrated for ease of comparison. The resulting signal is then compared to a specific entry in a table of values with each entry in the table corresponding to an operating profile of the stepper motor. If the resulting signal does not correspond to the operating profile for which the motor a configured, the stepper motor is jammed. A suitable alarm and a corresponding sequence of actions may then be triggered.

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