Rotor Dynamic Analysis of Ultra-high Speed Switched Reluctance Machines over 1 Million rpm

2018 ◽  
Author(s):  
Cheng Gong ◽  
Sufei Li ◽  
Thomas G. Habetler
Keyword(s):  
Dynamic Analysis ◽  
High Speed ◽  
Switched Reluctance ◽  
Switched Reluctance Machines ◽  
Ultra High Speed ◽  
Rotor Dynamic

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.

scholarly journals Ultra-High Speed Switched Reluctance Motor-Generator for Turbocharger Applications

2019 ◽  
Vol 162 ◽  
pp. 359-368
Author(s):  
Adel El-Shahat ◽  
Austin Hunter ◽  
Mosfequr Rahman ◽  
Yan Wu
Keyword(s):  
High Speed ◽  
Switched Reluctance Motor ◽  
Switched Reluctance ◽  
Ultra High Speed ◽  
Reluctance Motor
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