Design Optimization of a Permanent-Magnet Flux-Switching Generator for Direct-Drive Wind Turbines

Vladimir Dmitrievskii, Vladimir Prakht and Vadim Kazakbaev
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Vladimir Dmitrievskii: Department of Electrical Engineering and Electric Technology Systems, Ural Federal University, 620002 Yekaterinburg, Russia
Vladimir Prakht: Department of Electrical Engineering and Electric Technology Systems, Ural Federal University, 620002 Yekaterinburg, Russia
Vadim Kazakbaev: Department of Electrical Engineering and Electric Technology Systems, Ural Federal University, 620002 Yekaterinburg, Russia

Energies, 2019, vol. 12, issue 19, 1-15

Abstract: Due to the increasing need for direct-drive wind turbines, a large number of papers are dedicated to the optimization of low-speed wind generators. A permanent-magnet flux-switching machine can be a valuable option to use in such applications. This paper describes the optimization procedure of a direct-drive flux-switching wind generator. The average losses, the required converter power, and the cost of permanents magnets were chosen as the optimization objectives. To reduce the calculation efforts during the optimization, a method to construct the substituting load profiles is proposed. Two-mode and three-mode substituting profiles were constructed on the basis of the nine-mode initial profile. The losses calculated under the two-mode, three-mode, and nine-mode profiles accurately coincided, which supported the use of the low-mode substituting profiles instead of the initial one. During the optimization, the average losses decreased by 30%, which corresponded to an increase in the average efficiency by almost 6%. The required converter power was decreased by 10%. The total active material mass, cogging torque, and torque ripple were also slightly decreased.

Keywords: annual energy production; direct-driven wind generator; electric machine design; gearless machines; flux-switching machine; machine modelling; permanent-magnet machines; special electric machines; wind generators (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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