Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Synchronizing or phasing control
Reexamination Certificate
2005-10-18
2005-10-18
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Synchronizing or phasing control
C318S077000, C254S292000, C254S362000
Reexamination Certificate
active
06956339
ABSTRACT:
A hoist synchronization apparatus and method using a master controller operating software that provides a pulse reference to a slave controller. The slave commands its motor to rotate at the speed conveyed by that pulse reference. The slave controller monitors the pulse feedback from both the master encoder and the slave's encoder and compensates for any position error by adjusting its motor output speed. In addition, the slave controller includes the capability to automatically resynchronize the hoists. Resynchronization is accomplished by storing position error generated when either the master or the slave is run independently and correcting for the error when both units are operated at a later time.
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Kureck Aaron S.
Schlevensky Eric L.
Bayless Howard H.
Brantley Larry W.
Magnetek Inc.
Ro Bentsu
Waddey & Patterson , P.C.
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