Electricity: motive power systems – Positional servo systems – 'reset' systems
Reexamination Certificate
2005-09-06
2005-09-06
Nappi, Robert (Department: 2837)
Electricity: motive power systems
Positional servo systems
'reset' systems
C318S432000, C318S400260, C318S560000, C318S567000, C318S610000, C318S700000
Reexamination Certificate
active
06940247
ABSTRACT:
The PDT2filtering element (PDT2) and a Cauer filter (C2) are employed for use in control tasks of automation engineering, in particular for a filter connected downstream of a rotational speed controller. For tasks in control engineering, these have the advantage of a higher level of robustness, since a large frequency range is filtered, and a substantially smaller phase drop than conventional lowpass filters (PDT2). Consequently, by comparison with the known prior art a loss in dynamics is substantially minimized with these phase-saving lowpass filters, and an optimum is achieved in robustness and dynamics.
REFERENCES:
patent: 10056199 (2001-07-01), None
Schaefers Elmar
Troendle Hans-Peter
Baker & Botts LLP
Nappi Robert
Siemens Aktiengesselschaft
Smith Tyrone
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