摘要
针对高速电机转子易出现共振、断裂、高温产生不可逆退磁等问题,基于转子动力学设计、机械强度设计及流固耦合理论,对一台20 kW,20 000 r/min的高速永磁电机分别进行了电机转子的模态分析、强度分析和整个电机的温度场分析。在自由状态、轴承状态、实际工作状态3种情况下,分析了电机转子的临界转速;结合抗拉极限要求,综合考虑温升和转速影响,分析了转子护套强度;对电机进行了温度场分析。结果表明所设计电机转子无论在临界转速、转子强度还是在温升上都满足设计要求。
The high speed machine rotor was prone to resonance, fracture and high temperature to produce irreversible demagnetization. Based on rotor dynamics design, mechanical strength design and fluid-solid coupling theory, a high- speed permanent magnet machine with 20 kW and 20 000 r/min was used for the modal analysis of the rotor of the ma- chine, the strength analysis and the temperature of the whole machine field analysis. In the free state, bearing state and the actual working state, the critical speed of the rotor of the machine was analyzed. Combined with the tensile limit require- ment, the strength of the rotor jacket was analyzed considering the influence of temperature rise and speed. The temperature field analysis. The results show that the design of the machine rotor in terms of critical speed, rotor strength or temperature rise to meet the design requirements.
出处
《微特电机》
北大核心
2017年第12期1-4,13,共5页
Small & Special Electrical Machines
基金
国家科技支撑计划项目(2014BAF10B00/2014-BAZ04784)
关键词
高速永磁电机
转子强度
碳纤维
温度场
临界转速
high speed permanent magbet machine
rotor strength
carbon fiber
temperature field
critical speed
