摘要
多自由度永磁同步电机含有球壳型转子,电机额定转速接近临界转速时,电机会产生多重共振,影响电机正常运行;电机转子转速需穿越1阶模态的临界转速,工作在1阶模态临界转速和2阶模态临界转速之间的安全范围。根据转子系统动力学特性,建立自由状态下的转子数学模型,对有限元法与解析法进行对比分析;分析了转子陀螺效应对临界转速的影响,并进行了转子轴承刚度对临界转速是否有影响的有限元验证;测试了不同转子轴承刚度情况下,弯曲模态与形变位移之间的关系;通过实验验证球形转子的转速与振幅之间的关系,总结出相应的规律,为该类电机的优化设计和控制提供了理论依据和数据。
the spherical shell rotor is contained in the multi-degrees-of-freedom permanent magnet synchronous motor.When the rated speed of motor is close to the critical speed,the motor will generate multiple resonances,which will affect the normal operation of the motor.The rotor must pass through the first-order critical speed and work at the safety range between 1-order and 2-order critical speed.According to the dynamic characteristics of rotor system,a mathematical model of rotor under free state is established,and the results of the finite element method and the analytic method are compared and analyzed.The influence of rotor gyroscope effect on critical speed is analyzed,and the finite element verification of whether the rigidity of rotor material affects the critical speed,which is also carried out.The relationship between bending modal and deformation displacement is tested under different rigidity conditions.The relationship between the rotational speed and the vibration amplitude of the spherical rotor is verified by experiments,and the corresponding rules are summarized,which provides the theoretical reference and data for the optimal design and control of this kind of motors.
作者
李争
陈秋蒴
王群京
Li Zheng;Chen Qiushuo;Wang Qunjing(School of Electrical Engineering Hebei University of Science and TechnologyShijiazhuang 050018 China;National Engineering Laboratory of Energy-Saving Motor & Control TechniqueAnhui University Hefei 230601 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2019年第11期2269-2276,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目(51577048,51877070,51637001)
河北省自然科学基金项目(E2018208155)
河北省高等学校科学技术研究项目(ZD2018228)
高节能电机及控制技术国家地方联合工程实验室开放课题(KFKT201804)
河北省留学人员科技活动择优项目(C2015003044)资助
关键词
多自由度
永磁同步电机
临界转速
陀螺效应
模态
Multi-degrees-of-freedom
permanent magnet synchronous motor
critical speed
gyroscopic effect
modal
作者简介
通信作者:李争,男,1980年生,博士,教授,硕士生导师,研究方向为特种电机及其控制、新型电力传动装置。E-mail:Lzhfgd@163.com;陈秋蒴,男,1993年生,硕士研究生,研究方向为新型多自由度电机及其控制技术。E-mail:chenqiushuo@yeah.com.
