电动车用永磁同步电机转子温度估算  

Evaluation on Rotor Temperature of Permanent Magnet Synchronous Motor Used in Electric Vehicle

作　　者：彭志远 杜长虹 陈健 马永泉 周安健 任勇 PENG Zhiyuan;DU Changhong;CHEN Jian;MA Yongquan;ZHOU Anjian;REN Yong(Chongqing Changan New Energy Vehicle Technology Ltd., Chongqing401120, China;Changan-Ford-Mazda Engine Ltd., Nanjing 211100, China)

机构地区：[1]重庆长安新能源汽车科技有限公司,重庆401120 [2]长安福特马自达发动机公司,南京211100

出　　处：《重庆理工大学学报（自然科学）》2019年第9期11-16,72,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51305472);一体化电驱动总成关键技术研究(67612)

摘　　要：电动车用永磁同步电机转子温度精确估算可以防止磁钢永久退磁,同时发挥电机使用潜能,增加电机峰值转矩持续时间,实现电机定子成本降低。首先分析电机不同工作状态下各个热节点热量产生及传导机理,构建了电机转子温度模型,然后针对电机系统在不同环境温度、不同工作状态下的使用需求,提出一种基于系统等效热模型的转子温度实施迭代算法,同时分析台架试验数据获得环境温度对电机转子温度的影响规律,建立算法中转子温度特性数值模型。最后通过变化运行工况验证控制算法的正确有效性。实验结果表明:所提出的控制算法与实测转子温度误差在10℃以内,满足估算精度要求。High accuracy calculation of rotor temperature can avoid serious demagnetization and improve operation performance( e. g. increase operation time of motor peak torque) as well as decrease stator cost for permanent magnet synchronous motor used in electric vehicle. Firstly,we analyze the principle of heat generation and transfer for each thermal-node under different motor operation modes and design thermal model of rotor temperature,then propose real-time control arithmetic based on the equivalent heat model of iterativearithmetic for motor system requirement under different environment temperature and operation modes. Meanwhile we obtain affective rule of rotor temperature from environment temperature and build numeric models of rotor temperature performance by analyzing motor test data. Finally,the arithmetic validation is confirmed by variable operation condition on motor test bench,the result shows that the maximal deviation between actual and online rotor temperature is within 10 ℃,and it meets requirement of arithmetic accuracy.

关 键 词：电动车 永磁同步电机 转子温度 试验 

分 类 号：TM623.3[电气工程—电力系统及自动化]