关键词: 无刷同步发电机, 计算流体力学, 磁热耦合, 流固耦合, 电枢绕组温升, 平均温度

Abstract: In order to analyze the temperature rise of the armature winding during the operation of the 30 kVA aircooled brushless synchronous generator, based on the basic theoretical knowledge of fluid mechanics and heat transfer, the fluid-solid coupling model of the main generator was established, and the magnetothermal coupling method was used to analyze the temperature rise of the armature winding. The temperature of the pivot winding was numerically calculated and simulated. On the basis of the overall winding analysis method, a winding segment analysis method considering the temperature difference in different intervals was proposed, and a comparative study was made on the two-segment winding and four-segment winding methods, and the steady-state temperature rise of the winding under the three methods was obtained by fitting. The temperature rise test experiment in verified that the two-stage winding method can save simulation time and greatly improve the temperature rise accuracy.

Key words: brushless synchronous generator, computational fluid dynamics ( CFD), magnetothermal coupling, fluidsolid coupling, armature winding temperature rise, average temperature