Magnetic bearing controllers
Akira Chiba
In the previous chapter, electromagnetic designs and mathematical expressions for magnetic bearings and related actuators were described. The magnetic bearings were modelled as two simple force constants, which were defined with respect to displacement and current. The transfer function is inherently unstable so that the controller design is important.
In this chapter, the basic controller design strategy of a magnetic suspension system is described and discussed in detail. Based on a simple one-axis magnetic suspension system, the design of a proportional-derivative (PD) controller is explained in order to realize simple magnetic suspension. Designs with good frequency and time domain responses are ...
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