Review of Generator Systems for Direct-Drive Wind Turbines
نویسندگان
چکیده
The objective of this paper is to review direct-drive and geared generator systems and to identify suitable generator concepts for direct-drive wind turbines. The comparison of different generator systems in literature is discussed with the criteria based on the energy yield, cost, and weight. Different promising permanent-magnet (PM) machines proposed in literature are also discussed to find suitable generator type, because direct-drive PM machines are more superior in terms of the energy yield, reliability and maintenance problem. Finally, suitable concepts to overcome the disadvantages of direct-drive are suggested considering both electromagnetic and mechanical structure.
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