International Journal of Scientific & Technology Research

Home About Us Scope Editorial Board Blog/Latest News Contact Us
SCImago Journal & Country Rank

Scopus coverage:
Nov 2018 to May 2020


IJSTR >> Volume 7 - Issue 2, February 2018 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Optimal Generator Design For Gearless Wind Turbine

[Full Text]



Jamal Hussain



wind turbine; optimal design ; generator; PMSG



Synchronous generators are being extensively used in Wind Turbine Generator Systems (WTGS) and have slightly better advantage over induction generator. There are different types of synchronous generators, but the multi-pole Permanent Magnet Synchronous Generator (PMSG) with specific configuration is conclusively shown in this research, to be a better option for most systems including gearless wind turbine. It offers better performance due to higher efficiency and requires less maintenance since it does not have rotor current and can be used without a gearbox, which also implies a reduction of the weight of the nacelle and a reduction of costs. Paper discusses a new method for design of cost-efficient generator which is suitable for a large number of systems especially wind turbines. It uses Permanent Magnet Synchronous Generator (PMSG) in a direct-driven topology. PMSGs are preferable for energy systems, where input power is always fluctuating like wind energy. A very unique configuration of Generator design has been chosen amongst various configurations. A simple prototype built on this research is capable of reaching 6.7% of Betz’s limit, but this generator can be easily scaled which will result in better extraction of wind energy to meet the requirements.



[1] M. Yin, G.Li, M. Zhou and C. Zhao. "Modeling of the wind turbine with permanent magnet synchronous generator for integration". IEEE Power Engineering Society General Meeting, Tampa, Florida, 2007, pp. 1-6.

[2] Lee, R. W., E. G. Brewer, and N. Schaffel. "Processing of neodymium-iron-boron melt-spun ribbons to fully dense magnets." Magnetics, IEEE Transactions on 21, no. 5 (1985): 1958-1963.

[3] Ramtharan and N. Jenkins. "Modeling and Control of Synchronous Generators for Wide-Range Variable-speed Wind Turbines". Wind Energy, Wiley Interscience, vol. 10, pp. 231-246, March 2007.

[4] Meier, “Permanent-magnet synchronous machines with non-overlapping concentrated windings for low-speed direct-drive applications,” Doctoral Thesis, Royal Inst. Technol., Stockholm, Sweden, 2008.
[5] S. Meier, “Theoretical design of surface-mounted permanent magnet motors with field weakening capability,” Master Thesis, Royal Inst. Technol., Stockholm, Sweden, 2002.

[6] Asaf Ali, A.B. “Low Speed Permanent Magnet Synchronous Motor Comparison—Concentrated and Distributed Windings”; Annual Report of the Technical University Carolo-Wilhelmina; Brunswick, Germany, 2006.

[7] Toliyat, H.A.; Lipo, T.A. “Analysis of Concentrated Winding Induction Machines for Adjustable Speed Drive Applications-Experimental Results”. IEEE Trans. Energy Convers. 1994, 9, 695–700

[8] Mashimo, A., Hoshi M., Umeda, M., “Permanent Magnet Synchronous Generator for Wind-Power Generation” Fuji Electr. Rev. 2013, 59, 130-134