Temperature field analysis of an air-water composite cooling high-speed generator

Abstract

With the increase in the power density of the generator, the operation safety and the service life of the generator are increasingly affected by its internal temperature rise. For high-speed hybrid excitation synchronous generators, the stator includes armature windings and annular excitation windings, which makes heat dissipation difficult and requires the design of an efficient heat dissipation structure. An air-water composite cooling structure is proposed for this purpose. The air-cooled section is a cooling structure with inlets at both sides and radial ventilation. The water-cooled section includes cooling water pipes.