scholarly journals Very-High-Speed Miniaturized Permanent Magnet Motors: Design and Optimization

2019 ◽  
Author(s):  
Guillaume Burnand ◽  
Yves Perriard
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnet Motors ◽  
Design And Optimization ◽  
Very High

Design and Optimization of Multi-ring Permanent Magnet Bearings for High-speed rotors- A Computational Framework

2021 ◽  
Author(s):  
Raghavendra Kamath C ◽  
◽  
Ritesh Bhat ◽  
Siddappa I. Bekinal ◽  
Vijay G. S. ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Computational Framework ◽  
Design And Optimization

scholarly journals Rotor dynamic experimental investigation of an ultra-high-speed permanent magnet synchronous motor supported on a three-pad bidirectional gas foil bearing

2019 ◽  
Vol 11 (9) ◽  
pp. 168781401987536
Author(s):  
Wenjie Cheng ◽  
Zhikai Deng ◽  
Ling Xiao ◽  
Bin Zhong ◽  
Wenbo Duan
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Rotor System ◽  
Permanent Magnet Motors ◽  
Foil Bearings ◽  
Foil Bearing ◽  
Ultra High Speed ◽  
Rotor Dynamic

With a 10-kW, 120,000-r/min, ultra-high-speed permanent magnet synchronous motor taken as a prototype, experimental research is conducted on the rotor dynamic behaviours of a three-pad bidirectional gas foil bearing high-speed motor rotor system. Load-carrying properties of the three-pad bidirectional gas foil bearing are analysed, and natural frequencies of conical and parallel whirling modes of the elastically supported rotor are calculated based on an appropriate simplification to the stiffness and damping coefficients of the gas foil bearings. The prototype passes through a 90,000-r/min coast-down experiment. Experiments show that there are violent subsynchronous whirling motions that are evoked by the gas foil bearing–rotor system itself. The cause of shaft orbit drift is analysed, and the corresponding solution is put forward. The theoretical analysis and experimental results can offer a useful reference to the bearing–rotor system design of ultra-high-speed permanent magnet motors and its subsequent dynamic analysis.

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