Failure monitor for motor drive control system

Details Failure monitor for motor drive control system Failure monitor for motor drive control system

2007-07-17

2007-07-17

Goins, Davetta W. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S570000, C340S571000, C318S445000, C318S823000, C701S041000

Reexamination Certificate

active

11017664

ABSTRACT:
A failure monitor designed to monitor a failure in operation of a motor drive control system. The system works to drive a motor-driven member through an output shaft and includes an angular position sensor for determining an angular position of the output shaft for use in controlling the motor. The failure monitor includes a storage device retaining an output shaft stop position that is the angular position of the output shaft, as determined upon a stop of the motor. The failure monitor detect the presence of failure of the angular position sensor based on a comparison between the angular position of the output shaft, as measured upon initiation of a motor start request, with the output shaft stop position.

REFERENCES:
patent: 5869776 (1999-02-01), Vuong et al.
patent: 5896283 (1999-04-01), Usami
patent: 7033303 (2006-04-01), Takasaki et al.
patent: 2002-323127 (2002-11-01), None

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