Portable Pico Linear Generator Design with Different Magnet Shapes for Wave Energy Conversion System

Abstract

There are abundant of wave energy converter technologies available to convert wave energy into useable energy. However, most of them are huge and suitable for large application. Thus, this paper aimed to propose portable pico generator designs for small scale application. Investigation on the performance of designs with varying halbach magnet shapes was mainly focused and discussed. Two designs of different magnet shape i.e. triangular and trapezoid were proposed. Open-circuit simulation and optimization results were obtained using Finite Element Method. From the results, it was found out that Trapezoid Magnet Design produced better performance and lower material cost compared to another proposed design, Triangular Magnet as well as conventional Rectangular Magnet shape.

Designing of a generator for wave energy conversion for outdoor activities

“…Furthermore, the design will come up with a combination of axial and radial to form the Halbach magnetization. The process of the Halbach magnetization will be implemented by moving magnet with a longitudinal flux path because moving magnet has a small working magnetic air gap [14] that yields to the higher forces via a higher magnetic field. It also has higher efficiency as requiring less amount of permanent magnet compare to moving coil, which needs more coil for the same output [27].…”

“…Thus, based on the classification of the working principle, WAB is the most suitable device principle due to the small size and simple design of WAB. The device, according to this principle, precisely, point absorber, has the potential to be developed as portable pico-scale electricity [13,14]. Point absorber is a floating structure device that has fixed buoy inside a cylinder that rises and falls with the differences in wave height [15] and has horizontal dimensions that are smaller than the wavelength of the wave.…”

“…The basic concept of the linear generator requires a translator with the magnet, which reacts like a rotor [21]. The translator is attached to the heaving buoy with the winding stator, mounted in a structure that is fairly presented in [14]. When the heaving buoy oscillates, the stator induces an electric current.…”

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

“…The buoy rises and falls according to the movement of the waves to drive the permanent magnet linear generator (PMLG) [14], [15]. No field windings in the moving parts of the machine, resulting in adequate low power induction to generate peak level power [16], [17] and the use of permanent magnet has been considered a good choice in moving part where high performance drives are required to generate high performance of pico-scale output power [18]. Thus, this paper discusses the refined parameters of new design of the permanent magnet shape of with tubular longitudinal direct-drive generator.…”

Losses Computation in Reciprocating Tubular Permanent Magnet Generator with SMC Core

“…For this reason, the mechanical loss is low in the reciprocating PMTG. These electric machines can be used in hybrid electric vehicles [3] and for electricity generation from sea waves [4], [5].…”