EXAMINATION OF THE MAGNETIC FIELD OF A LINEAR GENERATOR ARRANGED WITH DUAL HALBACH ARRAY STRUCTURE USING IN WAVE ENERGY CONVERTERS

Abstract

Permanent magnet linear devices have wide applications in various fields. In the field of wave energy conversion, the use of linear generator has earlier been regarded as difficult and uneconomicaldue to technical problems. Many studies have been carried out to overcome these difficulties, but the actual results are still limited. In this study, an attempt to improve the magnetic flux density in linear generator was made. A dual Halbach array structure was investigated on parameters of line generator in wave energy converter to enhance flux density in air gap, thereby selecting the appropriate parameters to improve the output performance of linear generator. The numerical results from the finite element method were used to simulate and observe the magnetic flux distribution in the machine. The results also show that the dual Halbach array magnets has increased the magnetic flux density compared to the schema used in linear generator of Direct driven wave energy conversion.