Comparison of Analytical and Numerical Methods for PMSG Design Applied to D-Type Wind Generators

• Published in: Revista IEEE América Latina Vol. 21; no. 1; pp. 79 - 90
• Main Authors: Rodrigues Bruzinga, Gabriel, Filho, Alfeu Joaozinho Sguarezi, Pelizari, Ademir, Oliani, Igor
• Format: Journal Article
• Language: English
• Published: Los Alamitos IEEE 01-01-2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Air gaps; Comparative studies; Current density; Exact solutions; Finite Element Analysis; Finite element method; Flux density; Generators; Magnetism; Numerical analysis; Numerical methods; Permanent magnets; PMSG; Rotors; Stator windings; Synchronous machines; Wind Generators; Wind power generation; Wind turbines; Windings; Windpowered generators
• ISSN: 1548-0992; 1548-0992
• DOI: 10.1109/TLA.2023.10015129

The objective of this work is to perform a comparative study between analytical and numerical methods (implemented via 2-D and 3-D FEM software) in 3.88 MVA, 710 V, 145 Hz permanent magnet synchronous generator (PMSG) design with a focus on wind power generation, for D-Type wind turbines. For this purpose an analytical solving method is proposed using NdFeB surface permanent magnet rotor. After this step the analytical results were compared with the numerical results and showed results with average relative error margin of about 3% (2-D simulation) and average absolute error of 37.3 mT (3-D simulation). In the second part of the design, AlNiCo PM were used in the rotor, however, the analytical and numerical results showed high average error, making the previous method, used for NdFeB PM, not suitable, requiring changes in the method. It is proposed then, a readjustment of the PM volume calculation, through analytical and numerical methodology. For the development of the method the main contributions were the modification of the table of speeds and frequencies from 60 Hz to 145 Hz, the creation of an extension parameter for the tip of the stator tooth to refine the airgap flux density calculation and the analytical solution of the rotor design when using AlNiCo PM. After these changes, the results obtained with a calculated average error margin of about 4% were satisfactory. The analytical and numerical results were commented and presented at the end of this work for the validation of the methodologies for both of PM (NdFeB and AlNiCo).