Electricity: motive power systems – Positional servo systems – With stabilizing features
Reexamination Certificate
2006-04-11
2006-04-11
Duda, Rina (Department: 2837)
Electricity: motive power systems
Positional servo systems
With stabilizing features
C318S611000, C318S001000, C318S002000, C318S003000, C318S004000, C318S005000, C318S006000, C318S007000, C318S008000, C318S009000, C318S010000, C318S011000, C318S012000, C318S013000, C318S014000, C318S015000, C187S292000, C212S272000, C212S284000, C212S275000
Reexamination Certificate
active
07026780
ABSTRACT:
The invention concerns a method for stabilizing the motion of an articulated chain of a chain block, especially to prevent the formation of resonance oscillation of the chain, in which an articulated chain is led across a polygonal chain wheel with non-uniform pitch, which is driven by an electric motor.In order to create a method to prevent the formation of a resonance oscillation of the articulated chain, it is proposed that a periodic and/or stochastic and dampening actuating variable is superimposed on the velocity of the chain wheel (4) and the dampening actuating variable produces a change in the chain velocity so as to prevent a formation of a resonance oscillation.The chain drive with reduced polygon effect is characterized in that an electronic damper (8) is hooked up in front of the electric motor (2), which produces a control of the electric motor (2) such that a formation of a resonance oscillation of the articulated chain (5) is prevented.
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Search Report from corresponding European Application No. EP 04 00 6657, dated Sep. 14, 2004.
Persico Giuliano
Schröder Eberhard
Demag Cranes & Components GmbH
Duda Rina
Hiruy Elias
Van Dyke Gardner, Linn & Burkhart, LLP
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