Optimal Design of a 5MW Double Stator Single Rotor Permanent Magnet Synchronous Generator for Offshore Direct Drive Wind Turbines Using the Genetic Algorithm
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Publication Details
Author list: Gul W., Gao Q., Lenwari W.
Publisher: Hindawi
Publication year: 2018
Start page: 149
End page: 155
Number of pages: 7
ISBN: 9788986510201
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
This paper investigates the optimal design of a double stator single rotor permanent magnet synchronous generator (DSSR PMSG) with simulation validation. This scheme of generator is obtained by mechanically combining an interior rotor PMSG and an exterior rotor PMSG. Design of a 5MW radial flux DSSR surface mounted PMSG is developed with the second generation double layered fractional slot concentrated winding (FSCW), which reduces large initial investment, size and weight, in contrast to the usual massive direct drive (DD) generators for wind farms. Considering analytically calculated performance of generator, the Genetic Algorithm (GA) is applied to achieve lightest weight machine with adequate efficiency. To show advantages of proposed strategy, methodically computed magnetic flux distribution in air gaps, synchronous inductance of windings, electromagnetic torque, copper losses and core losses are compared with Finite Element Method (FEM) results and they reveal satisfactory enhanced solutions. Furthermore, usefulness of optimal DSSR PMSG is assured by comparing its total active weight with conventional radial flux surface mounted PMSG. ฉ 2018 KIEE EMECS (KIEE Electrical Machinery and Energy Conversion Systems).
Keywords
DSSR PMSG, FSCW, GA
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