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This paper proposes a specific hybrid 2-D simulation model of magnetic field distribution accounting for magnet skew in the case of a linear permanent magnet generator (LPMG). The proposed methodology is based on a hybrid numerical technique implementing standard finite elements for the analysis of stator and rotor parts combined with an analytical solution in the Cartesian coordinate system in the air-gap area specified for magnet skew consideration. The developed technique has been incorporated in a coupled field-circuit model for the overall simulation of the performance of an electrical generating unit for sea-wave energy extraction using LPMG. The derived model has been implemented in the control subsystem aiming to tune the movement of the wave energy absorber to the system resonance frequency enabling to optimize its performance. Simulation results have been validated by measurements on a sea-wave energy extraction demonstration plant. [ABSTRACT FROM PUBLISHER]

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. [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]