Electricity: motive power systems – Positional servo systems – With stabilizing features
Reexamination Certificate
2005-08-09
2005-08-09
Ip, Paul (Department: 2837)
Electricity: motive power systems
Positional servo systems
With stabilizing features
C318S609000, C318S610000, C318S623000, C318S629000, C310S090500, C342S401000, C073S660000
Reexamination Certificate
active
06927550
ABSTRACT:
To eliminate unwanted vibrations caused by synchronous disturbances, such as synchronous disturbances caused by an imbalance, for example, the invention proposes a compensation device for closed loop compensation of a synchronous disturbance in a rotating machine comprising a rotor (64) magnetically suspended by at least one radial magnetic bearing (63) comprising electromagnets (631, 632) driven by amplifiers (61, 62), a radial detector device (633, 634) for sensing the axial position of the rotor, and a closed loop servocontrol circuit connected to said detector device and to said electromagnets and comprising a control circuit (5) for controlling the energization of the electromagnets that supplies a control signal (u) to said amplifiers in response to signals supplied by the detector device to maintain the rotor in a predetermined axial position. The compensation device comprises means (100; 200; 300) for generating a signal for compensating the synchronous disturbance. Said means are inserted into the servocontrol circuit ahead of the energization control circuit (5) to minimize variation of the control signal in relation to the disturbances.
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Carrere François
Font Stéphane
Tamisier Vincent
Ip Paul
Societe de Mecanique Magnetique
Weingarten Schurgin, Gagnebin & Lebovici LLP
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