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

Separated magnet yoke for permanent magnet linear generator for marine wave energy converters

“…On the other hand, heavy saturation in the magnetic core has been reported. Furthermore, observations on the cogging forces [14,15] and the generated voltage harmonics [16] have also been performed on similar structure as structure presented in this paper.…”

“…Additionally, constant speeds or speeds having sinusoidal shapes are common approximations for simulating PMLGs [14,[16][17][18][19].…”

Investigation of Multi-phase Tubular Permanent Magnet Linear Generator for Wave Energy Converters

“…As one of main objectives is to reduce cogging, modifications have been applied to the magnet profile. Influenced by [19], the square profile has been modified to include to bevelled bottom profile with a 30⁰ angle, which has been chosen based on the findings in [19].…”

“…A different approach for cogging force reduction shown, in [19], is manipulating the profile shape of the permanent magnets. The results are obtained by means of FEM and reveal that could bevelled bottom profile reduce the cogging forces compared with square profile.…”

Analysis and Minimization of Detent End Force in Linear Permanent Magnet Synchronous Machines

“…However, the larger skewed length will increase the axial force and reduce the reciprocating range for the LPMSM with short stroke. Meanwhile, some Analysis and Minimization of Detent End Force in Linear Permanent Magnet Synchronous Machines L other methods have been investigated, such as shape optimization of the exterior teeth [18], current compensation [6], [19], and PM optimization [20], and each has both the advantages and disadvantages. For the LPMSM with short stroke, the secondary end effect is also non-negligible, while only limited literature has considered this problem [21].…”