Structure design and simulation research of active magnetic bearing for helium centrifugal cold compressor

被引：6
作者：
Zhang, S. Y. [1 ,2 ]
Pan, W. [1 ]
Wei, C. B. [1 ,2 ]
Wu, J. H. [1 ]
机构：
[1] Chinese Acad Sci, Tech Inst Phys & Chem, State Key Lab Technol Space Cryogen Propellants, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
ADVANCES IN CRYOGENIC ENGINEERING | 2017年 / 278卷
关键词：
D O I：
10.1088/1757-899X/278/1/012162
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Helium centrifugal cold compressors are utilized to pump gaseous helium from saturated liquid helium tank to obtain super-fluid helium in cryogenic refrigeration system, which is now being developed at TIPC, CAS. Active magnetic bearing (AMB) is replacing traditional oil-fed bearing as the optimal supporting assembly for cold compressor because of its many advantages: free of contact, high rotation speed, no lubrication and so on. In this paper, five degrees of freedom for AMB are developed for the helium centrifugal cold compressor application. The structure parameters of the axial and radial magnetic bearings as well as hardware and software of the electronic control system is discussed in detail. Based on modal analysis and critical speeds calculation, a control strategy combining PID arithmetic with other phase compensators is proposed. Simulation results demonstrate that the control method not only stables AMB system but also guarantees good performance of closed-loop behaviour. The prior research work offers important base and experience for test and application of AMB experimental platform for system centrifugal cold compressor.
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页数：8
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