Volume 29 Issue 1
Jan.  2014
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LONG Ya-wen, XIE Zhen-yu, XU Xin, WANG Xiao, ZHOU Hong-kai. Control strategy of active magnetic bearing system based on variable bias current control[J]. Journal of Aerospace Power, 2014, 29(1): 118-124. doi: 10.13224/j.cnki.jasp.2014.01.015
Citation: LONG Ya-wen, XIE Zhen-yu, XU Xin, WANG Xiao, ZHOU Hong-kai. Control strategy of active magnetic bearing system based on variable bias current control[J]. Journal of Aerospace Power, 2014, 29(1): 118-124. doi: 10.13224/j.cnki.jasp.2014.01.015

Control strategy of active magnetic bearing system based on variable bias current control

doi: 10.13224/j.cnki.jasp.2014.01.015
  • Received Date: 2013-01-17
  • Publish Date: 2014-01-28
  • The experiment setup of five degree-of-freedom active magnetic bearing (AMB) system was built up. The working principle of variable bias current control was presented. H control strategy was adopted for the digital controller design. Weight functions were selected according to the vibration amplitudes of the rotor operating at the natural frequency of the system. The signal of the rotation speed was introduced into the digital controller. The dynamic performance of the system with variable bias current was investigated, and also compared with the result of the system with fixed bias current. The results show the variable bias current control will not deteriorate dynamic performance of the system and it reduces the total currents of AMBs more than 25%.

     

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