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Performance Analysis of Conical Permanent Magnet Couplings for Underwater Propulsion

1
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
2
Key Laboratory for Unmanned Underwater Vehicle, Northwestern Polytechnical University, Xi’an 710072, China
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2019, 7(6), 187; https://doi.org/10.3390/jmse7060187
Received: 27 May 2019 / Revised: 14 June 2019 / Accepted: 15 June 2019 / Published: 18 June 2019
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Abstract

Permanent magnet couplings (PMCs) are widely used in underwater propulsion because it can solve the deep-sea sealing problem effectively. In this paper, a new type of conical permanent magnet coupling (CPMC) is proposed, which is able to match the tail shape of the underwater vehicle and make full use of the tail space to increase pull-out torque capability. Based on the three-dimensional finite element method (3D-FEM), the electromagnetic characteristics of an initial model for CPMC are analyzed. In order to facilitate the design and optimization of CPMC, an equivalent three-dimensional (3D) analytical method for the pull-out torque calculation is presented, and its accuracy is verified by comparison with the 3D finite element results. Finally, the influence of design parameters such as half-cone angle, pole pair, pole arc coefficient and permanent magnet thickness on maximum pull-out torque and torque density of CPMC is analyzed, and a preliminary optimization model is obtained. View Full-Text
Keywords: underwater propulsion; conical permanent magnet coupling; equivalent three-dimensional analytical method; pull-out torque; influence of design parameters underwater propulsion; conical permanent magnet coupling; equivalent three-dimensional analytical method; pull-out torque; influence of design parameters
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Li, Y.; Hu, Y.; Song, B.; Mao, Z.; Tian, W. Performance Analysis of Conical Permanent Magnet Couplings for Underwater Propulsion. J. Mar. Sci. Eng. 2019, 7, 187.

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