Active Control of Rotor Vibration in an Electric Machine by Cascaded Optimal and Convergent Control Methods
2012
This paper presents a method for suppressing radial rotor vibrations in an electric machine by the means of active vibration control. The required control forces are generated by an electro-magnetic actuator implemented as extra windings in the stator slots of the machine. A generic modified optimal LQ-based controller cascaded with a convergent controller is introduced to tackle the problem. The test results obtained by the implementation of the designed control algorithms in a 30 kW squirrel-cage induction motor are presented. The results show that the proposed control strategy is capable of significant vibration suppression.
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