摘要
为了解决低速大转矩永磁电机铜损耗大、局部温升过高的问题,以一台630 kW、37.5 r/min的低速大转矩永磁同步电机为研究对象,提出一种风自循环冷却方式,并对其可行性进行了计算分析。首先建立自循环强迫通风计算结构模型和数学模型,并用有限元法确定电机各部分的损耗及生热率;基于流固耦合分析方法对通风孔尺寸进行了优化设计,得到最优通风结构尺寸参数;分析了不同入口风量变化对电机温升的影响规律,同时保证入口风量相同,分析了绕组浸漆和不浸漆状态下的温升规律。在此基础上,为了解决冷却气体分布不均匀导致电机温升分布不均的问题,对机壳与风罩之间的距离进行优化设计,总结了保证气体流动均匀性的方法,为低速大转矩永磁电机的冷却系统设计提供了参考。
In order to solve the problem of high copper loss and high local temperature rise of low-speed high-torque permanent magnet motor,taking a 630 kW,37.5 r/min low-speed high-torque permanent magnet synchronous motor as an example,a wind self-circulation cooling method was proposed,and the feasibility of the method was calculated and analyzed.Firstly,the calculation structure model and mathematical model of self-circulation forced ventilation were established,and the loss and heat generation rate of each part of the motor were determined by finite element method.Secondly,based on the fluid-solid coupling analysis method,the optimization design of the ventilation hole size was carried out,and the optimal size parameters were obtained.Thirdly,the influence of different inlet air volume changes on the motor temperature rise was analyzed,and the temperature of windings under the condition of lacquer immersion and non-lacquer immersion was also analyzed.In order to solve the problem that the uneven distribution of cooling gas leads to the uneven distribution of temperature rise of the motor,the distance between the casing and the air cover was optimized,and the methods to ensure the uniformity of gas flow were summarized.The design experience was accumulated for the research of low-speed high-torque permanent magnet motor.
作者
高俊
韩雪岩
王勇
王世伟
李宏浩
GAO Jun;HAN Xue-yan;WANG Yong;WANG Shi-wei;LI Hong-hao(National Engineering Research Center for Rare-earth Permanent Magnet Machines,Shenyang University of Technology,Shenyang 110870,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2022年第11期58-64,共7页
Electric Machines and Control
基金
辽宁省教育厅面上项目(LJKZ0104)。
关键词
低速大转矩
流固耦合
冷却系统
自循环
温度场
流体均匀性
low-speed and high-torque
fluid-solid coupling
cooling system
self-circulation
temperature field
fluid uniformity
