Overload detector for servo driven machines

Details Overload detector for servo driven machines Overload detector for servo driven machines

1994-07-14

1998-08-18

Cabeca, John W.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

318465, 318 46, 318 60, 361 51, H02P 546

Patent

active

057962219

ABSTRACT:
A controller for detecting abnormal operating conditions of a continuous motion machine such as a packaging machine. The acceleration and velocity of motors for the various axes of the machine are examined by the controller and rapid deceleration or a more gradual deceleration to a lower velocity relative to a machine velocity are employed for stopping the machine when overloads in the form of jams or mechanical faults occur in moving parts of the machine. By using this system, machine overloads can be detected much earlier than by using conventional techniques, and as a result, damage resulting from overloads and nuisance tripping can be eliminated or greatly reduced.

REFERENCES:
patent: 3791037 (1974-02-01), DiCiaccio et al.
patent: 4518899 (1985-05-01), Wolf
patent: 4878333 (1989-11-01), Sommerfield
patent: 5130748 (1992-07-01), Tanaka
patent: 5166582 (1992-11-01), Jaeger et al.
patent: 5183144 (1993-02-01), Francioni
patent: 5299343 (1994-04-01), Tomoto et al.
patent: 5375098 (1994-12-01), Malone et al.

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