Circulating Current Analysis for High-Speed Motors with Stranded Windings by Considering End and Temperature Effect

2018 ◽  
Vol 23 (4) ◽  
pp. 659-664
Author(s):  
Yapeng Jiang ◽  
Junquan Chen ◽  
Xuan Teng ◽  
Dong Wang
Keyword(s):  
Temperature Effect ◽  
High Speed ◽  
Current Analysis ◽  
Circulating Current

scholarly journals Dark current analysis in high-speed germanium p-i-n waveguide photodetectors

2016 ◽  
Vol 119 (21) ◽  
pp. 213105 ◽  
Author(s):  
H. Chen ◽  
P. Verheyen ◽  
P. De Heyn ◽  
G. Lepage ◽  
J. De Coster ◽  
...  
Keyword(s):  
Dark Current ◽  
High Speed ◽  
Current Analysis

scholarly journals Inter-strand Circulating Current Analysis of End-region Transposed Coil of Power Generator using 3D Multi-layer FEM

2017 ◽  
Vol 6 (6) ◽  
pp. 449-455
Author(s):  
Masafumi Fujita ◽  
Takaaki Hirose ◽  
Takashi Ueda ◽  
Hiroyuki Ishizuka ◽  
Masashi Okubo ◽  
...  
Keyword(s):  
Current Analysis ◽  
Power Generator ◽  
Circulating Current

Residual Unbalanced Mass Determination of an AMBs Controlled Rotor Based on Control Current Analysis of the Feedback Loop

2018 ◽  
Author(s):  
Tianpeng Fan ◽  
Zhe Sun ◽  
Xiaoshen Zhang ◽  
Xunshi Yan ◽  
Jingjing Zhao ◽  
...  
Keyword(s):  
High Speed ◽  
High Performance ◽  
Feedback Loop ◽  
Image Data ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Current Analysis ◽  
Unbalanced Mass ◽  
Control Current

Active magnetic bearing technology is used more and more for its high performance, such as high speed and frictionless operation. But the rotor vibrates sometimes during operation due to the existence of residual unbalanced mass, which may affect the security of the whole system. In order to determine the distribution of residual unbalanced mass, this paper proposes a method based on frequency response, control current analysis, and image data processing. The theoretical and calculated results show the validity of the method.

Circulating current analysis and suppression in bipolar DC-DC converters

2017 ◽  
Author(s):  
Han Qiu ◽  
Wenlong Ding ◽  
Tao Wang ◽  
Bin Duan ◽  
Chenghui Zhang
Keyword(s):  
Current Analysis ◽  
Circulating Current

Temperature effect on service performance of high-speed railway concrete bridges

2016 ◽  
Vol 20 (6) ◽  
pp. 865-883 ◽  
Author(s):  
Y Tian ◽  
N Zhang ◽  
H Xia
Keyword(s):  
Temperature Effect ◽  
High Speed ◽  
Low Frequency ◽  
Numerical Approach ◽  
Service Performance ◽  
Dynamic Responses ◽  
Temperature Fields ◽  
Coupled Analysis ◽  
Element Analysis ◽  
High Speed Railway

Non-uniform temperature fields induced by time-varying solar position and heat exchange are of great significance for the bridge safety. The accurate identifications of these changes are necessary to avoid unexpected deformations and the loss of service performance. This article presents a numerical approach to determine temperature effects on train–bridge-coupled dynamics. Heat flux density of different components of a 32-m simply supported concrete bridge on high-speed railway is calculated, in which a section segmentation method is adopted for simplifications of boundary conditions. Based on heat–stress-coupled technology, temperature fields and deformation fields of the bridge are then computed via finite element analysis. Combining track irregularities and its thermal deformation as external excitations, the train–bridge-coupled analysis is solved by an inter-system iteration method. Dynamic responses of bridge and train are compared to those obtained neglecting the temperature effect. Comparative studies illustrate that temperature effect has major impacts on the bridge displacement due to the increase in low-frequency components of excitations. For the train, lateral responses are more obvious. Maximum derail factor and lateral wheel–rail force occur when the train leaves from the bridge.

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