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Comparative design of radial and transverse flux PM generators for direct-drive wind turbines

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4 Author(s)
Deok-je Bang ; Electrical Power Processing / DUWIND, Delft University of Technology, Mekelweg 4, 2628CD, The Netherlands ; Henk Polinder ; Ghanshyam Shrestha ; Jan Abraham Ferreira

The aim of this paper is to assess the radial flux permanent magnet (RFPM) and transverse flux permanent magnet (TFPM) generators for large direct-drive wind turbines. For the assessment, the electromagnetic design of RFPM and TFPM generators is done. The analytical design result of a TFPM generator is compared with the experimental result. A RFPM machine concept and four different TFPM machine concepts are designed electromagnetically for 5 MW direct-drive wind turbines. These machines are assessed with criteria such as the cost, the mass, the copper loss, the power/mass ratio, the power/cost ratio, the cost/mass ratio and the mass/torque ratio.

Published in:

Electrical Machines, 2008. ICEM 2008. 18th International Conference on

Date of Conference:

6-9 Sept. 2008