An Analytical Model for Leakage Effect in the Electrical Generator of Rim-Driven Marine Current Power System

Abstract:

This paper presents an equivalent magnetic circuit model to predict the leakage effect, especially the end leakage effect, of surface-mounted permanent magnet synchronous machine (SPMSM) in rim-driven marine current power (RMCP) system. The end leakage effect is usually neglected in most conventional permanent magnet (PM) machines. However, it is significant in the electrical generator of RPCM due to the short axial length. The idealized path and analytical expressions of end leakage permeance are given in this paper. Finite Element Method (FEM) 3D/2D and experimental values are presented to validate the proposed analytical model. With no need for the time-consuming FEM-3D calculation, a correction factor base on the analytical mode is proposed to adjust the results (e.g. back-EMF, torque) of conventional design when end leakage is ignored in the calculation. The calculation results and experimental values show that the proposed analytical model is accurate to analyze the leakage effects of SPMSM in RMCP system.

• Periodical: Advanced Materials Research (Volumes 860-863)
• Pages: 2244-2251
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.860-863.2244
• Online since: December 2013
• Authors: Song Xu, Hai Feng Wang*, Guo Biao Gu
• Keywords: End Leakage Effect, Equivalent Magnetic Circuit Model, FEM-3D/2D, Rim-Driven Marine Current Power System, Surface-Mounted Permanent Magnet Synchronous Machine

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