高速永磁同步电机流固耦合仿真与性能分析  

Fluid-solid coupling simulation and performance analysis of high-speed permanent magnet synchronous motor

作　　者：丁树业[1] 申淑锋 杨智[2] 陈少先 戴瑶[1] DING Shu-ye;SHEN Shu-feng;YANG Zhi;CHEN Shao-xian;DAI Yao(School of NARI Electrical and Automation,Nanjing Normal University,Nanjing 210023,China;No.704 Research Institute,CSIC,Shanghai 200031,China)

机构地区：[1]南京师范大学南瑞电气与自动化学院,南京210023 [2]中国船舶重工集团公司第七〇四研究所,上海200031

出　　处：《电机与控制学报》2021年第10期112-121,共10页Electric Machines and Control

基　　金：国家自然科学基金(51977112);江苏省自然科学基金(BK20191370);江苏省青蓝工程项目(2019)。

摘　　要：为了探讨冷却系统设计对高速永磁同步电机散热效果的影响,提出了一种轴向强迫通风的冷却结构。以一台200kW船用高速永磁同步电机为研究对象,基于流体动力学以及流固耦合传热理论,根据电机冷却结构特点,合理简化模型并给出基本假设与边界条件,建立了三维整机求解域模型。采用有限体积法对具有空冷和水冷集成冷却系统的高速永磁电机进行数值分析运算,分析了冷却水速对永磁电机温升的影响,揭示了最优水速方案下电机流变特性与温升分布规律。基于此,提出一种强迫空气通过气隙沿轴向流动的通风结构,通过对比不同通风结构下电机内流体场与温度场的仿真结果,证实轴向通风结构能够优化电机流温分布特性,提升电机冷却性能,对船用高速永磁同步电机冷却系统设计提供借鉴意义。In order to explore the influence of the cooling structure design on the heat dissipation performance of high-speed permanent magnet synchronous motor(HSPMSM),a cooling structure with axial forced ventilation is proposed.The research object is a 200 kW marine permanent magnet motor.According to the actual cooling structure of the motor,a three・dimensional solution domain model of the whole machine was established.Combining the theory of fluid dynamics and fluid-solid coupling heat transfer,the model was simplified and basic assumptions were given.By imposing boundary conditions,the finite volume method was used to perform numerical analysis calculations on the motor.The influence of water flow on the rheological characteristics and temperature rise distribution of the motor was analyzed.Based on this,a ventilation structure optimization scheme that forces air to flow along the axial direction is proposed.By comparing the distribution of the flow field and temperature field of the motors in different structures,the rationality of the axial ventilation scheme is verified.This research provides reference for the design of the cooling system of marine HSPMSM.

关 键 词：高速永磁同步电机 冷却系统 有限体积法 流固耦合 温度场 流体场 

分 类 号：TM351[电气工程—电机]