Method of modeling the electrical capacity of the measuring transducer

2021 ◽  
pp. 14-18
Author(s):  

To diagnose the eccentricity of the rotor shaft of an electric machine, a device is proposed, the sensitivity of which does not depend on fluctuations in the parameters of the network and the load of the electric machine, since the displacement of the rotor is monitored using capacitive sensors located evenly around the circumference of each end of the shaft. Diagnostic results are assessed according to two valid criteria. The device allows to determine not only the value of the eccentricity of the rotor, but also the direction of the displacement of the rotor. Keywords: electric machine, rotor eccentricity, method for modeling electrical capacity. [email protected]


2019 ◽  
Vol 2019 (6) ◽  
pp. 88-92
Author(s):  
P.I. Borshchov ◽  
◽  
A.S. Levitskyi ◽  


Author(s):  
Joshua A. Lorenz ◽  
Brian T. Murphy

Hydrodynamic journal bearings can exhibit a particular form of Shaft Differential Heating (SDH) sometimes known as the Morton Effect. This paper presents test data of the Morton Effect in the form of synchronous spiral vibration observed in a 4200 rpm rotating electric machine. With its original partial arc bearings, divergent spiral vibration prevented stable operation above 4000 rpm. Subsequent analytical SDH studies of different bearing types are described which led to a switch to 4 lobe sleeve bearings. The 4 lobe bearing retrofit eliminated the unstable spiral vibration behavior. To the authors’ knowledge, this is the first published instance of a verified case of the Morton Effect to be solved exclusively by a change in bearing hardware with no accompanying changes to the rotor, shaft or journal.









2011 ◽  
Vol 131 (8) ◽  
pp. 1029-1035 ◽  
Author(s):  
Ryoichi Takahata ◽  
Shinichi Wakui ◽  
Kenji Miyata ◽  
Keiji Noma ◽  
Masaharu Senoo


2018 ◽  
Vol 138 (9) ◽  
pp. 730-738
Author(s):  
Ryoichi Takahata ◽  
Shinichi Wakui ◽  
Kenji Miyata ◽  
Keiji Noma ◽  
Masaharu Senoo




2015 ◽  
Vol 135 (4) ◽  
pp. 142-143 ◽  
Author(s):  
Daisuke Yamane ◽  
Toshifumi Konishi ◽  
Takaaki Matsushima ◽  
Shota Kamei ◽  
Kazuya Masu ◽  
...  


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