基于计算流体力学的非晶合金轴向磁通永磁电机冷却系统设计  

Design of Cooling System for Amorphous Alloy Axial Flux Permanent Magnet Motor Based on Computational Fluid Dynamics

作　　者：韩雪岩[1] 张华伟[1,2] 徐昕 兰玉华[3] Han Xueyan;Zhang Huawei;Xu Xin;Lan Yuhua(Nation Engineering Research Center for REPM Electrical Machines Shenyang University of Technology Shenyang 110870 China;Xi’an Aerospace Precision Electromechanical Institute Xi’an 710100 China;Hebei Electric Motor Limited by Share Ltd Shijiazhuang 051430 China)

机构地区：[1]沈阳工业大学国家稀土永磁电机工程技术研究中心,沈阳110870 [2]西安航天精密机电研究所,西安710100 [3]河北电机股份有限公司,石家庄051430

出　　处：《电工技术学报》2017年第20期189-197,共9页Transactions of China Electrotechnical Society

基　　金：国家科技支撑计划(2013BAE08B00;2015BAF06B04);国家自然科学基金(51307111)资助项目

摘　　要：采用一种新型材料——非晶合金作为轴向磁通永磁(AFPM)电机的定子铁心。研制非晶合金和硅钢片两种材料的定子铁心,对其损耗特性进行对比,实验数据显示非晶合金替代常规硅钢片作为电机铁心,能够降低电机的铁耗,但是同时由于高频率的选择使得电机转子部分等损耗有所增加。为进一步提高非晶合金轴向磁通永磁电机冷却效率,优化电机设计保证电机的安全运行,对该类电机的冷却系统进行设计。研究四种冷却结构并建立相应的三维流体场数学模型和物理模型,基于计算流体力学(CFD)理论基础,通过有限体积法,在相同的计算条件、网格划分前提下,研究四种冷却结构的热特性和流动特性。优选出螺旋型结构并对其进行具体尺寸参数设计,最后对无隔水板和螺旋结构进行温升试验。试验结果表明,螺旋结构的绕组和转子冷却效率高出无隔水板结构33.1%和26.5%,为该类新型材料的永磁电机冷却结构设计及电磁方案优化提供了指导。In this paper,a new type of material amorphous alloy is used as the stator of axial flux permanent magnet(AFPM)motor.The stator core of amorphous alloy and silicon steel sheet are developed,and their loss characteristics are compared.The test data show the iron core using amorphous alloy instead of silicon steel can decrease the loss of motor.However,due to the selection of high frequency,the loss in the rotor increases.In order to further improve the cooling efficiency of amorphous alloy AFPM motor and optimize the motor design to ensure the safe operation of the motor,the cooling system is designed in this paper.Four kinds of cooling structures are studied.The corresponding mathematical and physical models of3D fluid field are established based on computational fluid dynamics(CFD).Under the same calculation and meshing conditions,the thermal and flow characteristics of these four kinds of cooling structures are studied by the finite volumemethod.The spiral structure is optimized and the specific size parameters are designed.Finally,the temperature rise tests of the parallel and spiral structure are carried out.The results show that,the cooling efficiencies of spiral structure in windings and rotor are increased33.1%and26.5%respectively,much higher than those of parallel structure.It provides guidance for using this new material to design cooling structure and optimize electromagnetic scheme of permanent magnet motors.

关 键 词：非晶合金 轴向磁通永磁电机 冷却结构 有限体积法 温度场 

分 类 号：TM315[电气工程—电机]