基于流固耦合方法的潜液式低温永磁同步电机温度场计算与分析

doi:10.16411/j.cnki.issn1006-7736.2025.03.011

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大连海事大学学报 ›› 2025, Vol. 51 ›› Issue (3) : 105-112. DOI: 10.16411/j.cnki.issn1006-7736.2025.03.011

基于流固耦合方法的潜液式低温永磁同步电机温度场计算与分析

王发琛,张书宽^*,张淯森,曹方舟,朱景伟

作者信息 +

Calculation and analysis of temperature field of a submerged cryogenic permanent magnet synchronous motor based on fluid-solid coupling method

WANG Fachen,ZHANG Shukuan^*,ZHANG Yusen,CAO Fangzhou,ZHU Jingwei

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摘要

低温永磁同步电机具有效率高、运行稳定的优点，是潜液式液化天然气泵驱动部件的理想选择。驱动电机温升过高会导致LNG气化，影响潜液泵系统的运行安全。为此，本文建立了一台6.5 kW低温永磁同步电机的三维流固耦合传热模型，给出了数学模型及边界条件，在考虑转子旋转对浸没LNG流动状态及转子摩擦损耗的影响后，对该电机的温度场分布进行了计算与分析。结果表明，当入口LNG流速为0.3 m/s时，电机绕组的最高温升为41.3 ℃，永磁体和护套的温升在37.5 ~ 41.7 ℃之间。研究结果为后续低温永磁同步电机的优化设计提供了参考。

Abstract

Cryogenic permanent magnet synchronous motors have the advantages of high efficiency and stable operation, making them an ideal choice for the drive components of submerged liquefied natural gas (LNG) pumps. Excessive temperature rise of the drive motor will lead to LNG gasification and affect the operational safety of the submerged pump system. In this paper, a three-dimensional fluid-solid coupling heat transfer model of a 6.5 kW cryogenic permanent magnet synchronous motor was established, and the mathematical model and boundary conditions were given to calculate and analyses the temperature field distribution of the cryogenic permanent magnet synchronous motor by considering the effect of rotor rotation on the flow state of submerged LNG and rotor friction loss. The result show that,when the inlet LNG flow rate is 0.3 m/s, the maximum temperature rise of the motor winding is 41.3°C, and the temperature rise of the permanent magnet and the sheath is in the range of 37.5 ~ 41.7°C, which provides a reference for the optimal design of the subsequent cryogenic permanent magnet synchronous motor.

导出引用

王发琛, 张书宽, 张淯森, 曹方舟, 朱景伟. 基于流固耦合方法的潜液式低温永磁同步电机温度场计算与分析[J]. 大连海事大学学报. 2025, 51(3): 105-112 https://doi.org/10.16411/j.cnki.issn1006-7736.2025.03.011

WANG Fachen, ZHANG Shukuan, ZHANG Yusen, CAO Fangzhou, ZHU Jingwei. Calculation and analysis of temperature field of a submerged cryogenic permanent magnet synchronous motor based on fluid-solid coupling method[J]. Journal of Dalian Maritime University. 2025, 51(3): 105-112 https://doi.org/10.16411/j.cnki.issn1006-7736.2025.03.011

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