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The paper analyzes permanent magnet geometry effects on cogging force of permanent magnet linear generators. The dynamic modeling of the generator's performance is based on sensitivity analysis technique and finite-element representation. The generator is coupled to a particular mechanical system for sea wave energy extraction applications. The proposed methodology involves minimization of cogging force through parametric sensitivity analysis on alternative magnet profile configurations. Index Terms--Cogging force, linear generator, permanent magnets, power generation from sea waves.

This paper presents the design procedure and modeling methodology for a four sided linear permanent magnet generator used in sea wave energy extraction applications. Appropriate coupled magnetic-electric-mechanical models for the analysis of the linear permanent magnet (LPM) generator and the hydraulic system have been developed. The effects of permanent magnet configuration on the overall system performance have been investigated. The proposed models suitability has been checked through measurements in a 16 kW prototype power plant. Index Terms--Coupled subsystems modeling, finite element method (FEM), permanent magnet linear generator, power generation from sea waves.