Development of a Low Speed Linear Generator for use in a Wave Energy Converter

Abstract

One of the main advantages of ocean waves as

resource for electrical energy production is its high energy

density. Several methods have been proposed for the conversion

of ocean wave mechanical energy into electrical energy. One

such method consists in the use of a direct drive linear generator

enclosed inside a floating element. The generator is driven by a

mass-spring system, which oscillates due to the ocean wave’s

movement. In this paper are presented the study, development,

and dynamic simulation of a linear tubular synchronous low

speed permanent magnet generator, for use in a wave energy

conversion system. The generator was dimensioned using a

finite element analysis tool. The wave energy converter

dynamic model, mechanical and electrical, was developed to

evaluate its response. To validate the generator’s dimensioning

and dynamic model, its prototype was built. The dynamic

model simulation results and the prototype’s experimental

results are presented.