大容量潜水式永磁同步电机冷却结构优化与空冷效果分析

微特电机 ›› 2025, Vol. 53 ›› Issue (10): 17-24.

大容量潜水式永磁同步电机冷却结构优化与空冷效果分析

李元斌¹,丁树业¹,瞿腾超²,张　琦¹

1. 南京师范大学电气与自动化工程学院,南京 210023; 2. 国网台州供电公司,台州 318001

出版日期:2025-10-28 发布日期:2025-10-28
作者简介:李元斌( 1999—) ,男,硕士研究生,研究方向为伺服电机多工况多物理场耦合研究。

Optimization of Cooling Structure of Large-Capacity Submersible Permanent Magnet Synchronous Motor and Analysis of Air-Cooling Effect

LI Yuanbin¹,DING Shuye¹,QU Tengchao²,ZHANG Qi¹

1. School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210023,China;
2. State Grid Taizhou Power Supply Company,Taizhou 318001,China

Online:2025-10-28 Published:2025-10-28

摘要/Abstract

摘要： 为了研究冷却系统对电机散热性能的影响并对电机的冷却结构进行优化,本文采用有限体积法,针对一台功率为 10MW 潜水式永磁同步电机的流体场和温度场进行耦合求解。基于计算结果,提出一种改进的转子环形通风道结构,改进后空冷风压从 53 768. 88Pa 变为 2 934. 89Pa,降低了 94. 54%,电机温升略有增加但仍满足要求,有效降低了系统的运行成本。进一步分析了冷却风量和风温度对电机温度的影响,并进行了响应面法分析,揭示了空冷系统对电机整体冷却效果的作用规律,提高空冷流量比降低空冷温度能带来更好的冷却效果,为潜水式电机的热设计提供了重要的参考依据。

关键词: 潜水式永磁同步电机, 流热耦合, 温度场, 流体场, 冷却系统

Abstract: In order to study the influence of the cooling system on the thermal performance of the motor and optimize the cooling structure of the motor,this paper uses the finite volume method to solve for the fluid field and temperature field of a power 10MW submersible permanent magnet synchronous motor. Based on the calculation results, an improved rotor annular ventilation channel structure is proposed. After the improvement, the air-cooling air pressure is changed from 53 768. 88 Pa to 2 934. 89 Pa,which is reduced by 94. 54%,and the temperature rise of the motor increases slightly but still meets the requirements,which effectively reduces the operating cost of the system. The influence of cooling air volume
and air temperature on the motor temperature was further analyzed, and the response surface method was carried out to reveal the role of the air-cooling system on the overall cooling effect of the motor,and it was found that increasing the aircooling flow rate can bring better cooling effect than lowering the air-cooling temperature, which provides an important reference for the thermal design of submersible motors.

Key words: permanent magnet synchronous motor submerged underwater,fluid-solid coupling,temperature field,fluid field,cooling system

李元斌, 丁树业, 瞿腾超, 张　琦. 大容量潜水式永磁同步电机冷却结构优化与空冷效果分析[J]. 微特电机, 2025, 53(10): 17-24.

LI Yuanbin, DING Shuye, QU Tengchao, ZHANG Qi. Optimization of Cooling Structure of Large-Capacity Submersible Permanent Magnet Synchronous Motor and Analysis of Air-Cooling Effect[J]. Small & Special Electrical Machines, 2025, 53(10): 17-24.

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