Magnet Generator For Wind Turbine Research Articles

Design optimization with genetic algorithm of open slotted axial flux permanent magnet generator for wind turbines

ABSTRACT In this study, the design parameters of Open Slotted Axial Flux Permanent Magnet (OSAFPM) Generator for wind turbines are presented using Genetic Algorithms (GA), an optimization algorithm based on natural selection and genetic mechanisms. Electromagnetic analysis of Open Slotted Axial Flux Permanent Magnet generator has been performed by using parameters optimized with Genetic Algorithms. The ANSYS Maxwell program, which uses the finite element method (FEM), has been used for electromagnetic analysis. Compared to ANSYS Maxwell, it is observed that the genetic algorithm significantly reduces the computational time required for design optimization. However, initial design and optimization with Genetic Algorithms have resulted by 8.94% increase in power densities. In addition, 12.71%, 38.62%, 62.02%, and 56.39% improvements have been obtained for air gap magnetic flux density, flux linkage, induced voltage, and current waveforms, respectively. This suggests that optimization with a Genetic algorithm improves the Open Slotted Axial Flux Permanent Magnet generator parameters.

An optimal design of coreless direct-drive axial flux permanent magnet generator for wind turbine

Different types of generators are currently being used in wind power technology. The commonly used are induction generator (IG), doubly-fed induction generator (DFIG), electrically excited synchronous generator (EESG) and permanent magnet synchronous generator (PMSG). However, the use of PMSG is rapidly increasing because of advantages such as higher power density, better controllability and higher reliability. This paper presents an innovative design of a low-speed modular, direct-drive axial flux permanent magnet (AFPM) generator with coreless stator and rotor for a wind turbine power generation system that is developed using mathematical and analytical methods. This innovative design is implemented in MATLAB / Simulink environment using dynamic modelling techniques. The main focus of this research is to improve efficiency of the wind power generation system by investigating electromagnetic and structural features of AFPM generator during its operation in wind turbine. The design is validated by comparing its performance with standard models of existing wind power generators. The comparison results demonstrate that the proposed model for the wind power generator exhibits number of advantages such as improved efficiency with variable speed operation, higher energy yield, lighter weight and better wind power utilization.

Review of Superconducting Generator Topologies for Direct-Drive Wind Turbines

Wind energy, as a clean and renewable energy, is now being widely developed to reduce carbon dioxide production and mitigate the energy crisis. The urgent needs for wind energy motivate larger generators with lower cost, lower weight, and higher reliability. A popular solution is the direct-drive generator concept, such as a permanent magnet generator and superconducting (SC) generator. When referring to weight, volume, and cost, SC generators are superior to permanent magnet generators for wind turbines with rated power of 8 MW or more according to a report from the American National Renewable Energy Laboratory. In order to find out the suitable topology for megawatt-class direct-drive wind turbine generators, various designs of SC machines in literatures are carefully reviewed; advantages and disadvantages are discussed and a few ways to benefit from their advantages are pointed out. Electromagnetic, mechanical, and thermal structures, including excitation system, SC support system, cryogenic cooling system etc., are reviewed for wind SC machines. Design challenges and possible solutions are also summarized.