Выбор конструкции электрического ветрогенератора мегаваттного диапазона мощности

Abstract

The paper deals with an analysis of possible designs of megawatt power range wind generators for wind turbines of mainland and offshore wind farms of low-speed and gearless drive. Synchronous generators with both radial and tangential magnetization of permanent magnets with classical distributed and concentrated windings are considered. Electromagnetic calculations were carried out for generators with rated speeds of 150 rpm and 12 rpm with a maximum power of 8000 kW at a linear voltage of 6300 V. The possibility of using electromagnetic calculation data for analysis was confirmed by numerical calculation of the two-dimensional electromagnetic field by finite element method using the ELCUT software. It is found that tangential magnetization increases the machine operating ratio for both types of windings. At tangential magnetization it is necessary to give preference to the choice of the concentrated winding at which generators with rated speeds of 150 rpm and 12 rpm will have higher efficiency, smaller masses of active materials and the smallest mass of magnets.