The annulling of the sudden appearance of an unbalance in rotary machines by using active magnetic bearings

The application of magnetic bearings has become more frequent during the last 20 years and represents a significant aspect improvements in construction machines with rotary motion. With advancement technology, number applications which have found their is increasing. In this paper, it shown how effect forces can annul negative influence unbalance, suddenly appeared rotor supported active bearings. Such cases may occur operation due to breakage parts falling off (e.g., fan blades), will lead sudden change mass balance system dislocation centre relation geometric rotor. mathematical model dynamic behaviour rigid was developed. nonlinear five degrees freedom only be solved numerically. Newmark beta method Newton-Raphson were used solve differential equations. results simulation showed advantages using for annulling occurrences unbalance machines.