Thermal Assessment of Outer Rotor Direct Drive Gearless Small-Scale Wind Turbines

Authors: Yusuf Yasa, Erkan Mese

Abstract:

This paper investigates the thermal issue of permanent magnet synchronous generator which is frequently used in direct drive gearless small-scale wind turbine applications. Permanent Magnet Synchronous Generator (PMSG) is designed with 2.5 kW continuous and 6 kW peak power. Then considering generator geometry, mechanical design of wind turbine is performed. Thermal analysis and optimization is carried out considering all wind turbine components to reach realistic results. This issue is extremely important in research and development (R&D) process for wind turbine applications.

Keywords: Direct drive, gearless wind turbine, permanent magnet synchronous generator (PMSG), small-scale wind turbine, thermal management.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1108889

References:

[1] Energy efficiency & renewable energy, Renewable Energy Data Book, 2013, U.S. Department of Energy.
[2] Florence Libert, “Design, optimization and comparison of permanent magnet motors for a low-speed direct-driven mixer” Master thesis, Royal Institute of Technology, Departement of Electrical Machines and Power Electronics, 2004.
[3] George Robert Katsanis, “Transient small wind turbine tower structural analysis with coupled rotor dynamic interaction” Master thesis, The faculty of California Polytechnic State University, 2013.
[4] Chad Van der Woude and Sriram Narasimhan “Dynamic Structural Modelling of Wind Turbines Using Comsol Multiphsics”, COMSOL conference Boston, 2010.
[5] J. Peeters, D. Vandepitte and P. Sas, “Structural Analysis of a Wind Turbine and its Drive Train Using Flexible Multibody Simulation Technique”, International Conference on Noise and Vibration Engineering (ISMA), 2006.
[6] L. Jian, G. Xu, Y. Gong, J. Song, J. Liang and M. Chang, “Electromagnetic Design and Analysis of a Novel Magnetic-Gear- Integrated Wind Power Generator using Time-Stepping Finite Element Method”, Progress in Electromagnetics Research, Vol. 113, 351-367, 2011.
[7] Y. Yasa and E. Mese, “Design and Analysis of Generator and Converters for Outer Rotor Direct Drive Gearless Small-scale Wind Turbines”, International Conference on Renewable Energy Research and Application (ICRERA), 2014.
[8] Wind Turbine Power Calculations, Technical Paper, The Royal Academy of Engineering.