| 摘要 |
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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