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1. Finite Element Analysis of the MICE Coupling Coil during the Pretension Winding Process | |||
XU Fengyu,CHEN Anbin | |||
Dynamic and Electronic Engineering 26 September 2014 | |||
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Abstract:Totally five finite element (FE) models are presented, they are used to analyze the stress and strain within the first MICE coupling coils during the pretension winding process. The FE models are built based on the principle of nested thin wall cylinder, and advanced FE technologies such as the "birth and death" and the contact. By comparing the computation results of the first three models, the deformation at the bobbin flanges for the first MICE coupling coil does not be predicted by the original FE model. Moreover, the limitation of the "birth and death" technology is revealed when it is applied to stress analysis for the pretension winding process. Because of its limitation, by mean of "birth and death" technology can only draw an approximate result. In order for the numerical simulation is as closely as possible to the real winding process, it is necessary to minimize the radial displacement. As the result, a new FE model is established, where roles of the coil bobbin support and coil fabrication process is taken into account. The process includes winding coil, welding cover plate, and removing bobbin support. In addition, the bobbin support is modified to satisfy the application condition for the "birth and death" element. By exploring the improved method, the computation results predict the actual stess and strain status of the finished superconducting coil more accurately. | |||
TO cite this article:XU Fengyu,CHEN Anbin. Finite Element Analysis of the MICE Coupling Coil during the Pretension Winding Process[OL].[26 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4611044 |
2. Control of low frequency oscillation in one-cycle-controlled Boost converter with the current feedback | |||
Wang Faqiang,Zhang Hao,Ma Xikui | |||
Dynamic and Electronic Engineering 24 June 2008 | |||
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Abstract:In this paper, the current feedback method is presented to control the low frequency oscillation in one-cycle-controlled Boost converter to operate in period-1 state. The stroboscopic map of the one-cycle-controlled Boost converter with current feedback is obtained by using the data-sampling method. Based on the presented stroboscopic map and the help of the loci of eigenvalues of the Jacobian matrix, the stable range of feedback gain is obtained. Finally, the results of simulation and experiment confirm the correctness of the theoretical analysis and the validity of the proposed method. | |||
TO cite this article:Wang Faqiang,Zhang Hao,Ma Xikui. Control of low frequency oscillation in one-cycle-controlled Boost converter with the current feedback[OL].[24 June 2008] http://en.paper.edu.cn/en_releasepaper/content/22475 |
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