Title :
A new concept for weight reduction of large direct drive machines
Author :
Shrestha, G. ; Polinder, H. ; Bang, D.J. ; Ferreira, J.A. ; McDonal, A.S.
Author_Institution :
Electr. Power Process./ DUWIND, Delft Univ. of Technol., Delft
Abstract :
This paper looks into a new concept for reducing the structural weight of large direct drive generators used in wind turbines. The concept uses magnetic bearings to position the rotor of the machine. The weight of the rotor using the new concept is compared to a rotor designed with conventional methods. The comparison of a 5 MW generator rotor structural material shows about 45% reduction of weight of the rotor.
Keywords :
finite element analysis; machine bearings; magnetic bearings; permanent magnet generators; rotors; turbogenerators; wind turbines; direct drive generators; large direct drive machines; magnetic bearings; permanent magnet radial flux machine; power 5 MW; rotor weight; weight reduction; wind turbine generator; wind turbines; Magnetic levitation; Permanent magnets; Rails; Rotors; Stators; Thermal force; Thermal stresses; Torque; Wheels; Wind turbines;
Conference_Titel :
Electrical Machines, 2008. ICEM 2008. 18th International Conference on
Conference_Location :
Vilamoura
Print_ISBN :
978-1-4244-1735-3
Electronic_ISBN :
978-1-4244-1736-0
DOI :
10.1109/ICELMACH.2008.4800206
