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Front. Inform. Technol. Electron. Eng.  2010, Vol. 11 Issue (10): 824-834    DOI: 10.1631/jzus.C0910711
    
Design considerations for electromagnetic couplers in contactless power transmission systems for deep-sea applications
Ze-song Li, De-jun Li, Lin Lin, Ying Chen*  
State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Design considerations for electromagnetic couplers in contactless power transmission systems for deep-sea applications
Ze-song Li, De-jun Li, Lin Lin, Ying Chen*
State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
 全文: PDF 
摘要： In underwater applications of contactless power transmission (CLPT) systems, high pressure and noncoaxial operations will change the parameters of electromagnetic (EM) couplers. As a result, the system will divert from its optimum performance. Using a reluctance modeling method, we investigated the gap effects on the EM coupler in deep-sea environment. Calculations and measurements were performed to analyze the influence of high pressure and noncoaxial alignments on the coupler. It was shown that it is useful to set a relatively large gap between cores to reduce the influence of pressure. Experiments were carried out to verify the transferring capacity of the designed coupler and system for a fixed frequency. The results showed that an EM coupler with a large gap can serve a stable and efficient power transmission for the CLPT system. The designed system can transfer more than 400 W electrical power with a 2-mm gap in the EM coupler, and the efficiency was up to 90% coaxially and 87% non-coaxially in 40 MPa salt water. Finally, a mechanical layout of a 400 W EM coupler for the underwater application in 4000-m deep sea was proposed.
关键词： Contactless power transmission (CLPT);  EM coupler;  Deep sea;  Gap effects    
Abstract: In underwater applications of contactless power transmission (CLPT) systems, high pressure and noncoaxial operations will change the parameters of electromagnetic (EM) couplers. As a result, the system will divert from its optimum performance. Using a reluctance modeling method, we investigated the gap effects on the EM coupler in deep-sea environment. Calculations and measurements were performed to analyze the influence of high pressure and noncoaxial alignments on the coupler. It was shown that it is useful to set a relatively large gap between cores to reduce the influence of pressure. Experiments were carried out to verify the transferring capacity of the designed coupler and system for a fixed frequency. The results showed that an EM coupler with a large gap can serve a stable and efficient power transmission for the CLPT system. The designed system can transfer more than 400 W electrical power with a 2-mm gap in the EM coupler, and the efficiency was up to 90% coaxially and 87% non-coaxially in 40 MPa salt water. Finally, a mechanical layout of a 400 W EM coupler for the underwater application in 4000-m deep sea was proposed.
Key words: Contactless power transmission (CLPT)    EM coupler    Deep sea    Gap effects
收稿日期: 2009-11-17 出版日期: 2010-09-30
CLC:  TM131.4+1  
基金资助: Project supported by the National High-Tech R & D Program (863) of China  (No.  2007AA091201),  the  Natural  Science  Foundation  of
Zhejiang Province, China (No. Y5090117), and the Qianjiang Excel-lence Project of Zhejiang Province, China (No. 2009R10036)
通讯作者: Ying CHEN     E-mail: ychen@zju.edu.cn
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引用本文:

Ze-song Li, De-jun Li, Lin Lin, Ying Chen. Design considerations for electromagnetic couplers in contactless power transmission systems for deep-sea applications. Front. Inform. Technol. Electron. Eng., 2010, 11(10): 824-834.

链接本文:

http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C0910711    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2010/V11/I10/824

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