轴向永磁式涡流制动器特性的多物理场仿真分析  

Multi-physics Simulation Analysis of Axial Permanent Magnet Eddy Current Brake

作　　者：金银锡[1] 潘东华[1] 孙芝茵[1] 邹志龙 李立毅[1] JIN Yinxi;PAN Donghua;SUN Zhiyin;ZOU Zhilong;LI Liyi(Institute of Space Environment and Physical Science,Harbin Institute of Technology,Harbin 150001,Heilongjiang Province,China)

机构地区：[1]哈尔滨工业大学空间环境与物质科学研究院,黑龙江省哈尔滨市150001

出　　处：《中国电机工程学报》2020年第22期7469-7479,共11页Proceedings of the CSEE

基　　金：国家自然科学基金(青年科学基金项目)(51807035)。

摘　　要：随着电磁装置的设计面向于小型化和高功率化的趋势,其温升可能引起装置性能衰减甚至是结构损坏。因此,在设计阶段,除电磁场特性之外,温度场以及流体场特性分析也至关重要。该文针对双边轴向永磁式涡流制动器结构,分析其电磁场、流体场和温度场特性以及相互之间的影响机理。首先,通过电磁场有限元法分析涡流制动器的制动特性以及导体板中的涡流损耗变化曲线。其次,通过建立的三维流体场模型,分析涡流制动器气隙中的流体流动规律以及传热特性。最后,基于电磁场和流体场计算结果,建立涡流制动器的热网络模型,分析其温升特性,并通过三维温度场有限元法验证其准确性和有效性。通过上述方法,可以精确估计涡流制动器的运行状态,给设计人员提供理论依据。With the design of electromagnetic device facing the trend of miniaturization and high power, its temperature rise may cause the performance of the device to decay or even structural damage. Therefore, in addition to electromagnetic fields, temperature field and fluid field analysis are critical during the design phase. In this paper, the characteristics of the electromagnetic, fluid and temperature of a double-sided axial permanent-magnet eddy current brake and their interaction mechanisms were analyzed. First, the braking torque and eddy current loss in the conductor plate were calculated using the electromagnetic field finite element method(FEM). Secondly, the fluid flow in the air gap and heat transfer characteristics of the eddy current brake were analyzed using the three-dimensional fluid field FEM. Finally, based on the results of the electromagnetic and fluid fields, a thermal network model of the eddy current brake was established. The temperature rise characteristics were analyzed using the thermal network model, and the accuracy was verified by the three-dimensional temperature field FEM. Through the above method, the operating state of the eddy current brake can be accurately estimated, providing a theoretical basis for the designer.

关 键 词：涡流制动器 有限元法 计算流体动力学 温度场分析 多物理场仿真 

分 类 号：TM359[电气工程—电机]