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http://dx.doi.org/10.3795/KSME-A.2013.37.4.511

Comparative Study of Performance of Switching Control and Synchronous Notch Filter Control for Active Magnetic Bearings  

Yoo, Seong Yeol (Institute of Advanced Transportation and Vehicle Research, Chungnam Nat'l Univ.)
Noh, Myounggyu (Dept. of Mechatronics Engineering, Chungnam Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.4, 2013 , pp. 511-519 More about this Journal
Abstract
Switching controllers for active magnetic bearings are claimed to minimize the copper losses because they do not use bias currents. In this study, we compare the performances of the switching controller with those of the widely used proportional-derivative (PD) controller. The PD controller is combined with a synchronous notch filter to reduce the effect of the unbalance disturbance. For a fair and objective comparison, the PD controller is designed systematically. The switching controller is designed so that the dynamics of the two controllers are almost identical. A system model is developed. This model includes the flexible modes of the rotor and the dynamics of the sensors and amplifiers. The simulation results show that the switching controller indeed reduces the copper loss at lower speeds. However, it fails to operate around the speed close to the bending mode of the rotor.
Keywords
Active Magnetic Bearing; Power Minimization Control; Switching Control; Synchronous Notch Filter;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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