Electricity: motive power systems – Positional servo systems – 'reset' systems
Reexamination Certificate
2006-10-12
2008-08-19
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Positional servo systems
'reset' systems
C318S561000, C388S906000
Reexamination Certificate
active
07414379
ABSTRACT:
A servo control system having a proportional (P) or a proportional plus integral (PI) position controller, which output signal represents an input speed reference signal for a speed close loop system with a speed controller detecting a speed deviation, derived from a speed feedback loop, which output signal represents an input current reference signal for a current close loop system with a current controller detecting a current deviation, derived from a current feedback loop, which controls an amount of the current flowing through a motor. The position controller detects the position deviation between a position reference signal and a position feedback signal separately for the P part controller, to produce a P part speed reference signal, and for the I part controller, to produce an I part speed reference signal, as a “two parallel-position outer loop feedback control system” and includes a position reference reduction circuit with scale coefficient less than one for the close loop with the P part controller. The P part controller and the I part controller connect to the summing unit, which sums the P part speed reference signal and I part speed reference signal, and its an output signal represents the speed reference signal for the speed close loop system.
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Burns & Levinson LLP
Cambridge Technology, Inc.
Cohen Terry
Ro Bentsu
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