In this work the investigation and design of a Direct Drive Wave Energy Conversion System for the Seaquest Concept is presented. It involves all the steps of the project, from the marine environment analysis to the problems linked to the connection to the grid, passing through the sizing procedure of an innovative arc-shaped electrical generator, in which the flux-switching principle has been applied, then through its analysis, optimization and performance verification by FEA, and then the study of the most suitable control strategies. Particular attention has been given to all the specificities this new particular generator presents: non-constant rotational speed, reciprocating motion, border effects. This arch-shaped generator has then been compared to a traditional rotating machine directly coupled with the shaft and moved by the pendulum (C) 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of the Centre for Renewable Energy.