Design and analysis of different cooling schemes of a flux‐modulated permanent magnet in‐wheel motor for electric vehicle applications

The flux-modulated permanent magnet (FMPM) in-wheel motor has provided a promising solution to drive electric vehicles (EVs) because of its salient features such as tight structure, high power (torque) density, and transmission efficiency. But it easily causes excessive temperature rise limits the torque output due poor heat dissipation capacity inside cavity. In this regard, 3D fluidic-thermal coupled model integrating computational fluid dynamics numerical transfer is proposed validated by experimental results on 2.1 kW, 1800 rpm PM prototype. distribution 22.6 600 FMPM under an existing natural cooling structure then numerically investigated. It revealed that difficult satisfy thermal requirements using only approach. Consequently, self-ventilated system non-contact lead-in (NCLI) are used maintain rise. addition, further improve capacity, NCLI modified with water channels separated orifice plates limit rises different schemes analyzed verify effectiveness structures.