Moving Towards the Reliability-oriented Design of Hairpin Winding for EV Traction Machines Driven by SiC Inverter  

作　　者：Xiaowei Ju Yue Zhang Zhiwei Xue Yuan Cheng Shumei Cui 

机构地区：[1]the School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China 1 [2]Shandong University,Jinan 250100,China [3]the School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China

出　　处：《CES Transactions on Electrical Machines and Systems》2025年第1期26-35,共10页中国电工技术学会电机与系统学报(英文)

基　　金：supported by the Project of National Natural Science Foundation of China under Grant 52407060 and 52422704;supported by Liaoning Province science and technology plan doctoral project under Grant 2023-BSBA-255.

摘　　要：With the development of high-frequency and highvoltagetraction machines(TM)incorporating hairpin windings(HW)and SiC inverters for electric vehicles(EV),both theinterturn voltage stress and temperature within HW are rising,increasing the risk of partial discharge(PD),and presentingsignificant challenges to insulation safety.Therefore,this paperaddresses this issue and proposes potential solutions.Firstly,thepaper examines an 8-pole,48-slot,6-layer HW TM to highlightthe unique characteristics of this winding structure,and explainsthe uneven distribution of interturn voltage stress andtemperature.Subsequently,a high-frequency equivalent circuitmodel of the HW TM prototype is developed.The error ofsimulation and experiment is only 5.7%,which proves theaccuracy of the model.Then,an improved HW scheme isproposed to lower the maximum voltage stress by 29.3%.Furthermore,the temperature distribution of HW TM isanalyzed to facilitate a detailed examination of the impact oftemperature on insulation PD.Finally,the partial dischargeinception voltage(PDIV)of interturn insulation,consideringtemperature effects,is calculated and verified throughexperiment.The paper proposes a reliability-oriented designmethod and process for HW TM.It demonstrates that thereliability-oriented design can achieve PD-free performance inthe design stage of HW.

关 键 词：Hairpin winding INSULATION Electric-thermal stress Partial discharge Si C inverter 

分 类 号：TN3[电子电信—物理电子学]