Cogging Force Minimization in a Permanent Magnet Linear Generator for Sea Wave Energy Extraction Applications

This paper analyses the stator teeth geometry effects on cogging force of permanent magnet linear generators. The method making translator adjacent sides´ permanent magnet allotropic is proposed to minimize the cogging force of four sided permanent magnet linear generators. The dynamic modeling of the generator´s performance is based on finite element method. The generator is coupled to a particular mechanical system for sea wave energy extraction applications. The methodology involves minimization of cogging force through analysis the relationship between cogging force and relative position of permanent magnet on adjacent sides.