Research on the Self-Exciting Vibration of Thrust-Type Magnetic Bearing : Cylindrical Mode

Publisher Website
Google Scholar
Abstract
This report is related to the self-exciting whirling of a rotor that is suspended in the space without any mechanical contact by a servo-controlled magnetic force in the axial direction. How to fix a magnetic core to the apparatus greatly affects the character of whirling and whirling threshold speed, and there exists the optimum condition in order to obtain a stable high-speed rotation. Here a mathematical model is built considering the internal damping which is due to magnetic properties or control circuits, and it is solved by a perturbation method. Then the same model is simulated on an analog computer and its solutions obtained. Those results are compared with experiments. The experimental whirl behaviors are in good agreement with two solutions if a damping ratio(h) is limited. The analyses give good criteria in the design of the bearing.

This publication has 0 references indexed in Scilit: