关键词: 永磁直驱电机, 集中绕组, 分布式绕组, 冷却设计

Abstract: Taking the locomotive permanent magnet direct drive motor as an example,the two cooling structures of water cooling and forced air cooling were analyzed,due to the size limitation,there was no cooling air duct at the bottom of the stator of the forced air cooled motor,resulting in the increase of local temperature and uneven temperature distribution of the winding. In order to solve this problem,the integrated water-cooling structure of the base and the end cover was adopted, which significantly improves the heat dissipation effect of the rotor and bearing. The advantages and disadvantages of centralized winding and distributed winding schemes were compared,and experimental verification was carried out to prove
the feasibility of the calculation method. The conclusions obtained had certain reference value for the cooling design of permanent magnet direct-drive traction motors of high-power locomotives.

Key words: permanent magnet direct drive motor,centralized windings,distributed windings,cooling design