Active Magnetic Bearings Unbalance Compensation

Active Magnetic Bearing (AMB) is one of typical mechatronic products and a new type high performance bearing piece. It has the properties of no friction, no fray, dispense with lubricate, lasting life, all extrude excellence above which can't be seen in traditional roll bearing and sliding bearing. With the technology of AMB is known and mastered gradually, AMB will be applied to these fields far and wide: aviation and spaceflight, vacuum technology, machine tool and tail-wagging engine, energy source and traffic, and so on. AMB is one of the advanced technology, and the research come down to Electromagnetism, Control Theory, Mechanics, Rotor Dynamics and Computer Science, and so on.This thesis makes base on the analyses of AMB working principium, gives two approaches for the unbalance compensation of AMB. Through emulation, these two approaches can reduce or eliminate the vibrations caused by unbalance forces. In this thesis, we also use DSP to achieve these two approaches. But the result is not perfect. So we analyze the reason of failure and give some solutions. We combine the merits of two approaches and propose a novel unbalance compensation method, notch filter based on coordinate transformations. At last, we carry out careful emulation and DSP realizations. This thesis has founded good base for development of AMB.