The vibration control of rotors is often performed using elastomeric or fluid dampers together with rolling element or hydrodynamic type bearings. Electromagnetic dampers seem a valid alternative to conventional solutions and also to active magnetic bearings (AMBs) because their simpler architecture, size and, if of transformer type, also for the absence of power electronics, position sensors, and any fast feedback loop. However, transformer eddy current dampers require a constant voltage power supply than can be provided by an embedded generator to reduce cost and improve the reliability. The present paper proposes a self-powered damper to fulfill these requirements. A three-phase permanent magnet electric generator (connected to the rotating shaft) generates the required power for the damping device. The generator is connected to the damping circuit by means of tuned impedance and a three-phase rectifier.
Self-Powered Eddy Current Damper for Rotordynamic Applications
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received March 31, 2014; final manuscript received July 21, 2014; published online November 12, 2014. Assoc. Editor: Ryan L. Harne.
- Views Icon Views
- Share Icon Share
- Search Site
Silvagni, M., Tonoli, A., and Bonfitto, A. (February 1, 2015). "Self-Powered Eddy Current Damper for Rotordynamic Applications." ASME. J. Vib. Acoust. February 2015; 137(1): 011015. https://doi.org/10.1115/1.4028228
Download citation file: