Conventional and TFPM Linear Generators for Direct-Drive Wave Energy Conversion

Abstract

Abstract-The archimedes wave swing (AWS) is a system that converts ocean wave energy into electric energy. The goal of the research described in this paper is to identify the most suitable generator type for this application. Of the conventional generator types, the three-phase permanent-magnet synchronous generator with iron in both stator and translator is most suitable, because it is cheaper and more efficient than the induction generator, the switched reluctance generator, and the permanent-magnet (PM) generator with an air-gap winding. The paper also proposes a new transverse-flux PM (TFPM) generator topology that could be suitable for this application. This new double-sided moving-iron TFPM generator has flux concentrators, magnets, and conductors on the stator, while the translator only consists of iron.Index Terms-Direct-drive generator, linear machine, permanent-magnet (PM) machine, transverse flux machine, wave energy.

Analysis and Experiments of the Linear Electrical Generator in Wave Energy Farm utilizing Resonance Power Buoy System

“…The moving motion of this system is completely described by the coordinates x 1 (t) and x 2 (t), which define the positions of m 1 and m 2 at any time t from their respective equilibrium positions. The application of Newton's second law of motion to the system gives the matrix below (2) (2) In Eq. (2), [F] is the external force generated by wave energy, which causes the heaving motion of the buoy.…”

“…On the other hand, the linear electrical generator can overcome the drawbacks of rotational motion as it can use linear kinetic motion of the wave straightly without any mechanical mechanism to convert the motion. Therefore, wave power generation system, which uses the linear electrical generator, has been studied in recent years [1][2][3]. As part of the recent research, we have been researching on WRPS (Wave energy farm utilizing Resonance Power buoy System).…”

A Novel Method of Reducing the Cogging Torque in SPM Machine with Segmented Stator

“…However, it needs a large area of raw materials during lamination punching, resulting in more leftover materials with lower material utilization and higher manufacturing cost. Besides, the complicated stator winding process and low copper fill factor also reduce the efficiency of the machines [4][5][6]. In the process of machine design, only when the slot opening is wide enough, can the stator winding be easily winded.…”

Optimization Design of Magnetic Gear Based on Genetic Algorithm Toolbox of Matlab

“…It has a promising prospect in the low-speed and high-torque respects of ships(including submarine) [1], electric locomotives [2], electric vehicle [3], elevators [4], wind power generation [5], tidal power generation [6].…”

“…In this paper, the exact analytical method is adopted to analyze and calculate the electromagnetic fields and the Matlab genetic algorithm is employed to optimize the parameters. Radius of the inner rotor yoke R 2 Outer radius of the inner rotor PMs R 3 Inner radius of the slots R 4 Outer radius of the slots R 5 Inner radius of the outer rotor PMs R 6 Inner radius of the outer rotor yoke β…”