Optimized design of PM halbach array linear generator for sea wave energy converters operate at maximum power transfer

Abstract

This paper proposes Halbach array PM linear generators for direct conversion of ocean or sea wave energy. This generator is proposed to be directly coupled to a reciprocating wave energy system which may be a valued alternative for pneumatic and hydraulic systems. In this research, air-cored permanent magnet PM linear generator has been optimally designed according to optimal cost and performance indices. The design depends on Halbach array PM arrangement. The design this linear generator is appropriate for direct extraction of energy from sea waves specially at small wave amplitude. The finite element method and the space harmonic analysis are used to develop the electromagnetic design of this topology. In this article, the concept of the extraction of maximum permissible power from sea waves is established according to the direct wave energy converters hydrodynamics model. The dynamic analysis of the Halbach array linear generator is investigated during the state of maximum power extraction.