Design considerations for electromagnetic couplers in contactless power transmission systems for deep-sea applications

Autor:	Lin Lin, Ying Chen, Dejun Li, Ze-song Li
Rok vydání:	2010
Předmět:	Power transmission Materials science business.industry Magnetic reluctance Acoustics High pressure Salt water General Engineering Electric power Underwater Fixed frequency Telecommunications business
Zdroj:	Journal of Zhejiang University SCIENCE C. 11:824-834
ISSN:	1869-196X 1869-1951
DOI:	10.1631/jzus.c0910711
Popis:	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.
Databáze:	OpenAIRE
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