Refine design parameters for permanent magnet shape modification of the direct-drive generator

Abstract

The high cost associated with operation has promoted the progress of wave energy conversion and has higher power output and larger size. However, many countries are bordered by the sea, and the possible area for using wave energy is very small which can generate peak power generation systems with a power output of less than 100 W. The purpose of this article is to introduce the refined parameters of new design of the permanent magnet shape of with tubular longitudinal direct-drive generator. Three designs proposed, which different shapes of permanent magnets with same topology. The parameter optimization process was analysed using finite element analysis to determine the best main parameters of the design, namely the length of the stator length to translation ratio (𝐿𝑠/𝐿𝑟), pitch ratio (𝜏𝑚𝑟/𝜏𝑝.), and split ratio (𝑅𝑚/𝑅𝑒). To evaluate design performance, electrical losses from the proposed design were also evaluated. The optimization results show these designs generator can produce 100 W of peak level output power with higher efficiency at rated current and optimal load.

Optimal load management of autonomous power systems in conditions of water shortage

“…by combining the relations (18) and ( 20) into one matrix inequality, the matrix 𝐴 𝑖𝑛𝑒𝑞 and vector 𝑏 𝑖𝑛𝑒𝑞 will be formed: (23) Equalities ( 16), (17), and ( 19) make it possible to form vectors 𝑋 𝑚𝑖𝑛 and 𝑋 𝑚𝑎𝑥 :…”

“…Existing research in this area can be divided into several categories. A significant part of the work is aimed at development, optimization and integration of individual elements or devices of the power system such as multi terminal interlinking converters (ILCs) [11], [12], maximum power point tracker controllers [13]- [15], different other types of battery controllers [14], controller of six pulse three phase rectifier [15], maximum power point tracking [16], generators [17]. Another area of research is the optimization of placement from the modes of work of various elements, for example, reactive power compensation units [18].…”