Fluid and thermal effect on temperature-dependent power increase of electric vehicle's permanent magnet synchronous motor using compound water cooling method

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2024-11-29 DOI:10.1016/j.csite.2024.105543

Zichao Zhang, Qiang Song, Bilal Ahmed, Yuecheng Han

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Abstract

Taking advantage of compound housing water jacket (HWJ) and hollow-shaft water jacket (SWJ) cooling based on the temperature-dependent power of permanent magnet synchronous motor (PMSM) is a solution for enhanced electric vehicle (EV) performance. The fluid and temperature field of a 40 kW PMSM at three typical continuous working points were studied, covering low to high speeds of EVs. The influence of different coolant flowrates on power of motor was obtained by multi-physics field coupling analysis method. The impact of current control modes was also investigated. 3D computational fluid dynamics (CFD) conjugate heat transfer calculation combined with 3D lumped parameter thermal network (LPTN) was adopted to calculate the flow and temperature. Temperature-dependent material properties were taken into consideration in electromagnetic finite element analysis (FEA). The models were modified and validated by experiments. Once compounding SWJ on the basis of a strong HWJ cooling, the PM temperature can continue to decrease over 20 degC. The insensitive characteristic of PM temperature towards SWJ flow rate was observed. Under constant current control mode, 3.8 %, 6 % and 4 % PMSM power enhancement by compound cooling were proved at three typical working points. Under current open-loop, 7 %, 16 %, and 10 % increases with compound cooling were confirmed.

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采用复合水冷却方法的电动汽车永磁同步电机的流体和热效应对温度相关功率增加的影响

利用复合外壳水套（HWJ）和空心轴水套（SWJ）基于永磁同步电机（PMSM）的温度相关功率进行冷却，是提高电动汽车（EV）性能的一种解决方案。研究了40kw永磁同步电动机在三个典型连续工作点下的流体和温度场，涵盖了低速和高速电动汽车。采用多物理场耦合分析方法，得到了不同冷却液流量对电机功率的影响。研究了电流控制方式的影响。采用三维计算流体力学（CFD）共轭传热计算结合三维集总参数热网络（LPTN）计算流量和温度。电磁有限元分析中考虑了材料的温度相关特性。通过实验对模型进行了修正和验证。一旦复合SWJ在一个强大的HWJ冷却的基础上，PM温度可以继续降低超过20摄氏度。观察到PM温度对SWJ流量的不敏感特性。在恒流控制模式下，复合冷却在三个典型工作点的功率增益分别为3.8%、6%和4%。在当前开环条件下，复合冷却能提高7%、16%和10%。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.