1. bookVolume 49 (2012): Issue 4 (January 2012)
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18 Mar 2008
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Direct-Drive Contactless Wind Generator with Concentrated Winding

Published Online: 17 Sep 2012
Page range: 14 - 20
Journal Details
License
Format
Journal
First Published
18 Mar 2008
Publication timeframe
6 times per year
Languages
English
Copyright
© 2020 Sciendo

A clear trend has emerged in the field of wind power industry concerning the creation of low-, medium-, and even high-power direct-drive wind turbines without the use of gearboxes. Such generators are usually multipolar and mostly excited from permanent magnets. In the low-speed performance, multipolarity means a higher specific torque and reliability as well as lower operating costs, which in the case of high-speed generators is hindered by gearboxes. Multipolarity with a high specific torque can be achieved mainly through the use of permanent magnets of high-energy materials (such as NdFeB) and through design solutions for the armature winding. The authors compare two most common types of wind generator's armature windings: the distributed one, which contains a coil embracing several teeth, and the concentrated armature winding - with one coil for one stator tooth. The comparison (along with the experience in developing the wind turbines) shows that the con-centrated winding version has a number of advantages, the main of them being the multipolarity. This means that the generator with a concentrated winding can be more acceptable for the direct-drive wind turbines, is easier to make and simpler to operate. Another very important advantage of concentrated windings shown in this work is that they allow achievement of a higher specific electromagnetic torque, which means smaller size and weight of such a generator in the low-speed version.

Keywords

Kopilov, I., & Ljadova, T. (1988). Wind turbine without gearbox. Hydro project, Nr.129, 170-174 (in Russian).Search in Google Scholar

Levin, N., & Serebrjakov, A. (1991). Inductor generator in small power wind turbine. Energy buildings, (3), 53-55 (in Russian).Search in Google Scholar

Dirba, J., Levin, N., & Pugachov, V. (2006). Vēja Energijas elektromehāniskie pārveidotāji. Rīga: RTU, p. 312 (in Latvian).Search in Google Scholar

Spooner, E., & Williamson, A. (1996). Direct coupled permanent magnet generators for wind turbine applications. IEEE proceedings, Electric Power Appl., 143 (1).Search in Google Scholar

Postnikov, I. (1975). Total theory and transiet processes in electrical machines. Moscow: High School, 220 (in Russian).Search in Google Scholar

Kopilov, I. (1987). Mathematical modelling of electrical machine. Moscow: High School, 248 (in Russian).Search in Google Scholar

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