混合电动汽车用磁通切换型永磁电机冷却结构分析

本文的研究对象为三相10kW的磁通切换永磁电机(FSPM),该电机主要用作电动汽车的起动发电机。本文基于有限元法(FEM)计算磁通切换永磁电机的损耗值,并进行实验验证;其次本文利用AnsysFluent仿真磁通切换永磁电机稳态温度场分布和暂态温度场分布,进行实验验证;最后本文基于磁通切换永磁电机的温度场数值模型和计算流体力学(CFD)仿真对电机现有的水冷结构进行优化分析,提升水冷结构的冷却性能。

Analysis of Cooling System for a Flux-switching Permanent Magnet Machine in Hybrid Electric Vehicles

This paper investigates the losses and the thermal performance of a three-phase 10kW flux-switching permanent magnet(FSPM)machine used as an integrated starter generator(ISG)for hybrid electric vehicles,where the transient and steady thermal simulations of the FSPM machine were performed in the Ansys Fluent and the temperature rise experiments were conducted under different operating conditions for the verification.Also,the thermal analytical model of the FSPM machine was simplified into one-dimensional steady heat conduction model with two heat sources in cylindrical coordinates.In addition,an analytic equation for temperature distribution of the FSPM machines was proposed and verified by temperature rise experiments.Finally,optimizations on the cooling jacket were conducted by analytical calculations and verified by computational fluid dynamics(CFD)predictions.