Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1989-08-16
1992-01-14
MacDonald, Allen R.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
31856816, 31856824, 901 49, 395 90, G05B 19407
Patent
active
050815938
ABSTRACT:
A technique for preventing a stalled linear motor device from damage including monitoring accelerometer servos which generate signals representative of the difference between a command acceleration signal controlling the linear motor and the actual acceleration experienced by the linear motor device which signal represents the acceleration error and the direction of the error. The different signal is compared against programmed limits to develop a break-loose signal when the programmed limit (positive or negative) is exceeded. The break-loose signal is monitored as to duration, which duration is preprogrammed according to the dynamics of the system specifications presently in use. In the event that the break-loose signal exceeds the preprogrammed time limit, a latch is set, generating an interrupt signal applied to the computer control which immediately removes all motive power from the system and tests the latch to determine the source of the error, the latch remaining in the set state awaiting the computer test and being reset only after recognition by the computer.
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Lammineur, P., and Cornillie, O.: Industrial Robots, 1984, pp. 8-9.
Joyner Roger S.
MacDonald Allen R.
Megamation Incorporated
Weinstein Louis
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