전기자동차용 구동모터 오일 냉각 순시해석

Abstract

Typical traction motors of electric vehicles utilize water jacket-based or air-based cooling. Currently, lightweight traction motors are preferred to extend the range of electric vehicles. As a result, direct cooling techniques have garnered significant attention from researchers. Direct coil-based cooling methods are of two types: oil injection type and oil spraying type. Direct oil-based cooling methods exhibit high cooling capacities. In this study, we investigate the transient increments in temperature in 160 KW traction motors. To this end, the power losses of motors were estimated using JMAG software . Using two-phase computational fluid dynamics (CFD) simulation over a duration of 18 s, the transient increase in temperature was predicted . The CFD predictions agreed well with the experimental observations, with an error less than 5%. We expect that the conclusions of this study will contribute to the improvement of the cooling performance of 160 KW traction motors.