Damper co located characteristics of industrial magnetic bearing
YU Zhen jie, HU Xiong xin, LANG Cheng ye, XV Fang
(Key Laboratory of E&M., Ministry of Education & Zhejiang Province, Zhejiang University of 
Technology, Hangzhou 310014, China)

Abstract: Aiming at transient electrical eddy current damping effect of industrial magnetic bearing hard to describe, features of eddy current damper was analysied by us and its effect was quantitatively evaluated. Firstly,a sample model of industrial PWM magnetic bearing with electric damper and motional damper was derived; then, a SDOF magnetic bearing was simulated, contrastive analysised the vibrational characteristics by MatlabSimulink ; finally,co located characteristics, quantitative evaluation of vibration suppression and feature of current was verified by simulation of impact response. The results indicate,because of motional damper and electrical damper in industrial magnetic bearing, self stabilzition existed during transient process, control current was stabilized faster,and the peak value of vibratory displacement decrease 10.23% comparing with the general case.

Key words: industrial magnetic bearing; eddy current; damper; co located characteristics