Review on Thermal Behavior and Cooling Aspects of Axial Flux Permanent Magnet Motors–A Mechanical Approach

With the increasing demand for high-energy density motors applications such as electric vehicles and aircraft propulsion, axial flux permanent magnet are promising. However, utmost care should be taken when designing an motor with a higher torque because of thermal effects. To enhance reliability overall performance motor, efficient management is important, restricted by maximum temperature. Therefore, this study comprehensively reviews different techniques used modeling motors. Computational fluid dynamics, lumped parameter method, finite element analysis were to calculate total heat transfer inside motor. Various enhancement have been presented, including core cooling (water jacket cooling, air oil cooling) winding (direct slot end fins). Finally, two case studies 8kW AFPM 65kW arrangement discussed.