Cooling Enhancement of an Axially Forced Air-Cooled Motors Using Axial Air Deflector

This paper presents a proposal for the implementation of an axial air deflector in order to enhance the cooling capabilities of an axially forced air-cooled motor. The prediction of global fluid-thermal characteristics is carried out using the numerical analysis method. The obtained calculations are validated using experiments, with a relative error of 4.4% observed between the simulated and measured values. The present study focuses on investigating the cooling enhancement mechanism of the axial air deflector through numerical analysis and subsequently validating its effectiveness in enhancing cooling. Furthermore, an analysis was conducted to examine the correlation between the geometric parameters of the axial air deflector and its ability to enhance cooling. Upon the installation of the axial air deflector, notable enhancements are observed in the fluid flow condition within the end space. Consequently, the stator winding experiences a reduction in both the maximum temperature rise and average temperature rise, amounting to 2.5 K and 1.7 K, respectively.