摘要
低温电机是潜液式液化天然气(liquefied natural gas,LNG)泵的核心部件。该文主要讨论了潜液式LNG泵用变频低温异步电机的设计方案。首先研究了电机电磁材料的低温特性,结合低温异步电机温升情况确定了电机的电磁负荷。建议从转子开始设计变频低温异步电机,并认为变频低温异步电机的槽形特别是转子槽,应设计为"矮胖"形以减少该类电机的漏抗和转子摩擦损耗。仿真分析了11 k W设计样机在LNG(-161℃)及液氮(-196℃)的运行性能,并进行了液氮低温试验,试验数据与仿真分析相吻合,验证了理论分析的正确性,该文的研究成果可为变频低温异步电机的设计提供参考。
Cryogenic electrical motors are the key component of submerged liquid natural gas （LNG） pumps. In this paper, some design aspects of an inverter-driven cryogenic electrical motor for a submerged LNG pump were presented. First of all, the characteristics of conductive material and magnetic material in the motor were discussed to determine the electric and magnetic loadings of the cryogenic induction motor by combining with the thermal analysis. Secondly, this paper proposed to design the motor starting with its rotor. And its slots, especially the rotor slots should be designed as short and fat shape to decrease leakage inductances and friction losses. Finally, the designed 11 kW prototype was simulated to analyze its performance in-161℃ LNG and-196℃ liquid nitrogen. And we tested the prototype in liquid nitrogen. The experimental results matched the simulation data so that the theoretical analysis was validated. Therefore, the proposed design aspects can serve as a designing reference for ainverter-driven cryogenic induction motor.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第20期5317-5326,共10页
Proceedings of the CSEE
关键词
潜液式液化天然气泵
低温异步电机
变频
电机
设计
submerged LNG pumps
cryogenic inductionmotors
inverter-driven
electrical motor design
