计及退磁分析的电驱重构型车载充电系统  

Electric-drive-reconstructed onboard charger with demagnetization analysis

作　　者：仇琳皓 於锋[1] 张宇豪 Qiu Linhao;Yu Feng;Zhang Yuhao(School of Electrical Engineering and Automation,Nantong University,Nantong 226019,China)

机构地区：[1]南通大学电气与自动化学院,南通226019

出　　处：《电子测量技术》2024年第17期23-30,共8页Electronic Measurement Technology

基　　金：国家自然科学基金(52177051)项目资助。

摘　　要：电驱重构型车载充电(EDROC)系统通过将驱动系统组件复用为充电系统,分时执行电驱和充电功能,能够有效降低成本和充电设备的体积占用。然而,在高温工况下EDROC系统中的永磁同步电机(PMSM)存在不可逆退磁的风险。鉴于此,本文通过分析电机在不同条件下退磁程度,进而提出电机在充电工况下安全运行边界。首先,分析EDROC系统在直流充电和边跑边充模式下的绕组电流;其次,建立电机不可逆退磁模型;然后,针对不同充电模式,详细分析不同温度和充电电流下电机退磁程度,并以此建立电机在充电工况下的安全运行边界;最后,基于一台2 kW实验样机开展实验,验证本文不可逆退磁模型的准确性以及安全运行边界对EDROC系统安全运行的必要性。The electric-drive-reconstructed onboard charger(EDROC)can effectively reduce costs and occupy the volume of charging equipment by reusing the drive system components into charging system and executing the electric drive and charging functions in a time-sharing manner.However,there is a risk of irreversible demagnetization of permanent magnet synchronous motors in EDROC systems at high temperatures.In view of this,this paper analyzes the degree of demagnetization of the motor under different conditions,and proposes the safe and stable operating conditions of the motor under charging conditions.Firstly,the winding currents of the EDROC system under DC charging mode and in-motion charging mode are analyzed.And then,the irreversible demagnetization model of the motor is established.Moreover,for different charging modes,detailed analysis is conducted on the demagnetization degree of the motor under different temperatures and charging currents.Based on this,the indispensable conditions for safe and stable operation of motor under charging conditions is established.Finally,experiments were carried out based on a 2 kW laboratory prototype to verify the accuracy of the irreversible demagnetization model and the necessity of the conditions for safe and stable operation of the EDROC system.

关 键 词：电驱重构型车载充电系统 退磁分析 电动汽车 六相电机 

分 类 号：TN701[电子电信—电路与系统]