Analisis Perancangan Prototipe Generator dengan Kombinasi Flywheel dan Bearing Levitasi Magnetik

Abstract

A generator is an electric machine that can convert mechanical power into electrical power. There are two types: the AC generator and the DC generator. There are two types of DC generators, namely DC generators without field reinforcement and DC generators with field reinforcement. In using a DC generator, there will definitely be losses. The losses that occur are divided into three, namely: copper or electrical losses, iron or magnetic losses, mechanical losses. To reduce mechanical losses in the generator, Bearings or Bearings with low frictional forces are needed. The friction that occurs between the moving parts of the Bearings results in the loss of a large amount of energy occurring in the generator. Ball Bearings on Bearings can be replaced by using magnetic Bearings that utilize levitasi magnetik technology which can generate a floating lift on the rotor by utilizing magnetic pole repulsion so that it can eliminate almost all frictional losses. In this study the authors will conduct an experiment regarding the combination of the use of a flywheel and magnetic Bearing levitation on a generator. The use of a flywheel serves to maintain the fluctuating prime mover on the generator and the use of levitasi magnetik Bearings serves to reduce mechanical losses in the generator. Based on the results of the analysis in this study, the use of a flywheel with a mass of 3 kg and a diameter of 18 cm can maintain the duration of the turbine rotation after the wind is off, the highest is around 44.33 seconds at a wind speed of 7 m/s and the lowest is around 17.33 seconds at a wind speed of 4 m/s, the use of levitasi magnetik Bearings can improve the performance of the system, there is an increase of around 3.10% in the rotational speed of the turbine, an increase of around 4.41% in the starting duration, an increase of around 5.08% in duration after the wind is off and there is an increase of around 6.77% in the electric power generated.