A method for compensating for a low frequency interference - force of a rotor with active magnetic bearings, an active magnetic bearings with compensation as a rule, - - circuit for carrying out of the compensating and use of the magnetic bearing

摘要

The invention relates to a method for compensating for at least of a low-frequency mechanical interference - oscillation, which, in a rotor of an active magnetic bearing by the action of an undesired - force on the rotor is caused. The mechanical interference - oscillation has a disturbing - vibration attenuator - frequency below of a rotary - frequency of the rotor to. The method has the following method steps: a) analyzing the low-frequency mechanical interference - oscillation, which leads to a disturbance force - - - analysis result, b) determining a compensation - force on the basis of the disturbing force - - - analysis result for generating a of the mechanical interference - oscillation counteracting mechanical compensation - force in the rotor and c) introduction of the compensation - force in the rotor, whereby the method steps a), b) and c) with the aid of at least one of a magnetic bearing - rule - circle to the rules of the active magnetic bearing decoupled compensation as a rule, - - circle of the active magnetic bearing are carried out. In addition, a corresponding active magnetic bearing with a rotor, at least one magnetic bearing - rule - circle to the rules of the active magnetic bearing and at least one of the magnetic bearings - - circle usually decoupled compensation - - circle as a rule, to compensate for at least of a low-frequency mechanical interference - oscillation is specified. The active magnetic bearings are used as well as the method for compensating for the mechanical interference - oscillation in a turbo-compressor.