车用永磁同步电机的铁耗与瞬态温升分析  

Iron losses and transient temperature analysis of the permanent magnet synchronous motor for electric vehicles

作　　者：郭伟[1] 张承宁[1] 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081

出　　处：《电机与控制学报》2009年第1期83-87,92,共6页Electric Machines and Control

基　　金：国家"八六三"高技术基金项目(2007AA11A105)

摘　　要：为了提高车用永磁同步电机的短时过载能力和功率密度,利用有限元方法进行了综合考虑电磁、热和控制策略的损耗和瞬态温升的非线性仿真分析。损耗分析指出了铁耗由于弱磁的原因在基速附近就达到了最大;峰值工况下的铜耗在整个速度范围内基本不变;连续工况下的铜耗最大值也同样因弱磁的需要而出现在最大工作转速。瞬态温升分析表明绕组端部温度最高而成为薄弱环节;短时工作时永磁体的温度比绕组低但连续或循环工作时两者温度相差不大;增加水流量对绕组温升的影响有限,特别是短时峰值工作的影响就更小,水冷电机加强散热能力的方法在于加强材料应用和工艺改进。To extremely improve short-term overload capability and high power density of the motors for electric vehicles, the losses and transient temperature rise were thoroughly simulated with finite element method considering the electro-magnetic, thermal and control strategy. Losses analysis indicated that the max.;mum iron loss occurred at the base speed due to the field-weakening. The copper losses were almost constant for peak power operation. The maximum copper loss for continuous operation mode occurred at maximum operation speed because of the field-weakening requirement as well. The temperature rise analysis showed that the winding end was the vulnerable area where the highest temperature occurred. The temperature in the perement magnet was lower than in the winding at short-term operation and there was few difference between the two at continuous operation or power loop. Increasing water flow has very limited impact on winding temperature, especially at short-term peak power operation. The key techniques to enhance the heat dissipation ability of water-cooled motor were the improvement of material and processing technologies.

关 键 词：永磁同步电机 铁耗 温升 

分 类 号：TM35[电气工程—电机]