Design of a single-phase flux radial generator with opposite poles (U-S) using permanent Neodymium magnet (NdFeB)

Abstract

Nowadays, the energy crisis is one of the main problems in Indonesia. The depletion of fossil fuels is the most dominant factor. Therefore, new energy solutions are needed. Generators are an essential factor in renewable energy in generating electricity.Further research is required to create a generator that may work at low rotational speeds. Electricity supply service from year to year continues to increase in any hemisphere due to the needs of the community that separated from the demand for electrical energy, especially in Indonesia. There are still many regions of Indonesia that have not to be electrified, especially remote areas, borders, and outer islands. Thus, alternative energy sources are needed, such as new and renewable energy, as electricity producers. One effort to overcome the scarcity of electrical power is the use of water and wind energy in electricity generation both on a large scale and on a small scale. Indonesia has considerable wind potential related to the energy sector, but this system also requires batteries or energy storage media. Innovations on energy conversion technology, especially in permanent magnet NdFeB permanent radial and axial flux generators have been developed. An electric generator is a device that can convert mechanical energy (motion) into electrical energy. In designing radial flux generators with opposite poles, they have 24 coils on the stator and 12 magnets on each rotor, where each coil has 450 windings connected in series with 24 Neodymium Iron Boron (NdFeB) magnets on the rotor. The diameter of the email wire used in this generator is 0.3 mm. Tests carried out using a resistive load of 3000 Ω, which is paralleled as much as 1, 2, and 3 as a load. Tests carried out on the voltage, current, and rotational speed of the rotor to determine the power and efficiency of the generator. The test results show that this magnetic flux change produces a voltage of 101 volts without load.