Low Speed Permanent Magnet Generator Research Articles

3D-printed materials based low-speed permanent magnet generator for energy harvesting applications

Abstract This work presents the study about the practicability of building a low-speed permanent magnet generator suitable for energy harvesting applications using 3D-printed structures. 3D-printer is used to prepare phototype of proposed generator. The major parts of the proposed device are fabricated through Polylactic Acid and permanent magnet materials. The prototype permanent magnet generator is tested with rotational speed under low speed condition. The experimental results have been shown that the construction generator can generate the electrical energy to charges the battery with maximum voltage at battery terminal of 1,136 mV

Analytical and Numerical Deflection Study on the Structure of 10 kW Low Speed Permanent Magnet Generator

Analytical and numerical studies of the deflection in the structure of 10 kW low speed permanent magnet generator (PMG) have been discussed in this paper. This study is intended to prevent failure of the structure when the prototype is made. Numerical analysis was performed with the finite-element method (FEM). Flux density, weight and temperature of the components are the required input parameters. Deflection observed were the movements of the two main rotor components, namely the rim and shaft, where the maximum deflection allowed at the air gap between rotor and stator should be between 10% to 20% of the air gap clearance or 0.1000 mm to 0.2000 mm. Base on the analysis, total deflection of the analytic calculation was 0.0553 mm, and numerical simulation was 0.0314 mm. Both values were in the acceptable level because it was still below the maximum allowed deflection. These results indicate that the structure of a permanent magnet generator (rim and shaft) can be used safely.

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

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.