Traction Motor Cooling Systems: A Literature Review and Comparative Study

More efficient cooling systems are an enabler for the increase in power density electric traction motor. Contemplating to existing reviews, this article presents a comprehensive collection of heat transfer mechanisms different removal techniques used motors. In article, overview various concepts and future motors is presented, approaches compared. The following literature review compiles geometry-based calculation formulas applied motor technology. Furthermore, general phenomena appearing reviewed compiled easy access. Various specifically relevant aspects, including rotor shaft cooling, spray concepts, air convection phenomena, bearing transfer, stator-housing contact, examined more detail. For validation result, based on well-known design, thermal analysis comparison methods carried out. Modeling done with lumped parameter network (LPTN). This concludes by demonstrating advantages disadvantages modeling data.