Seeing the typology of Axial-Flux Permanent-Magnet Generator, doctoral student at Faculty of Engineering UGM has done research to obtain the best topology of generator’s rotor-stator that produces highest power.
Axial-Flux Permanent-Magnet Generator is a generator used for wind turbine application as a renewable energy resource.
“Electricity energy using wind turbine needs low rotation and is directly coupled to make it efficient. This type of turbine would need many installments of magnet generators, hence, Axial-Flux Permanent-Magnet Generator,” said Prih Sumardjati Mulyaseputra when doing his doctoral promotion on Thursday (25/1) at Faculty of Engineering.
This generator, has various types of topology that are a set of rotor and stator plates, arranged alternatingly with multi-rotors and multi-stators. In other words, various types of topology is shown by the amount of air gap that limits the interstator and rotor.
Researchers designing generators with air core have used two rotors-one stator topology but they did not explain why using such topology. Prih therefore wanted to find out the best topology to create high power, to get magnetic material in coil core to increase the capacity of the Axial-Flux Permanent-Magnet Generator through flux flow engineering.
“The optimum topology of rotor-stator is 2 rotors-1 stator as it has biggest power in each disc,” he said,” said the lecturer of Politeknik Negeri Bandung.
He also found out the most optimum core coil is of Fe3O4 magnetite with relative permeability 6 π .10-6 H/m, and with 99,8% content back iron having magnetic permeability 2 π.10-3 H/m/ the generator will have power as much as 1,900 VA.
The research started with analysis of FEM of the generator and calculated the power of generator, variations of rotor-stator 1-1 up to 5-6 topology, followed by preparation of FEM analysis of generator, geometry, topology, parameters and variables, simulation and calculation of power with variations of core material, and optimalising of various power as magnetic material function.
Lastly, he maximised the generator power as magnetic flux flow engineering with generator simulation by adding back iron ring, flux density B in simulation of generator having air core with back iron ring material, and calculation simulation of output towards back iron ring material.