The operating principle of a radial-passive axial-active controlled magnetic bearing is presented in this papeer. According to the zero damping characteristic of magnetic bearing, we provide the compensating strategy of the magnetic bearing. The regulator circuit and the effects of time constant and amplifier gain on the system are also discussed. We find out the regulator gain by analyzing the root locus and draw the Bode plots of the regulated system. It can be proved from the experimental results that our design is right. The compensating idea described in this paper provides a theoretical basis for selecting reasonable parameters for compensating device in magnetic bearing control system.
展开▼
