Large capacity non-salient pole synchronous generator is the core equipment for energy conversion in the power system. Its high electromagnetic load bring severe thermal management challenges

especially the design and optimization of cooling systems

which have become a key bottleneck for improving equipment performance. This review systematically elaborates on the latest research progress in the field of thermal management systems for large capacity non-salient pole synchronous generator in recent years. First

an in-depth exploration is conducted on the loss and heating mechanisms of large capacity non-salient pole synchronous generator

revealing the mechanisms and laws of heat generation. Secondly

from the three dimensions of the stator winding

rotor winding

and stator core of a large capacity non-salient pole synchronous generator

combined with efficient electromagnetic and heat transfer analysis methods

the internal heat distribution and transfer process of the generator are deeply analyzed

and the characteristics and technical limitations of the existing cooling technology for large capacity non-salient pole synchronous generators are pointed out. Finally

the paper discusses key technical challenges that demand urgent resolution in the thermal management system of large capacity non-salient pole synchronous generators

and further explores the development trends of relevant cooling technologies.