CAJ | 학술논문

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 kW 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.
저온전궤시잠액식액화천연기(liquefied natural gas, LNG)빙적핵심부건.해문주요토론료잠액식LNG빙용변빈저온이보전궤적설계방안.수선연구료전궤전자재료적저온특성,결합저온이보전궤온승정황학정료전궤적전자부하.건의종전자개시설계변빈저온이보전궤,병인위변빈저온이보전궤적조형특별시전자조,응설계위"왜반"형이감소해류전궤적루항화전자마찰손모.방진분석료 11 kW 설계양궤재LNG(?161℃)급액담(?196℃)적운행성능,병진행료액담저온시험,시험수거여방진분석상문합,험증료이론분석적정학성,해문적연구성과가위변빈저온이보전궤적설계제공삼고.
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 11kW 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.