摘要
为克服解析法和有限元法在电磁力波计算中的缺点,提出一种电磁力波的快速准确计算方法。利用有限元软件中静磁场求解器对电机的有、无齿槽结构模型进行2次有限元仿真,快速准确地得到永磁体磁动势和气隙磁导,进而求得特定阶次、特定频率下各电磁力波幅值。此外,考虑定子齿刚度的影响,对多个定子铁心的固有频率进行计算,总结定子铁心等效圆环的快速等效公式。以6极36槽调速永磁同步电机为例,采用定子铁心等效圆环对其固有频率进行解析计算,并用有限元法和锤击法验证计算结果的准确性。基于此,将电磁激振力波施加到定子铁心等效圆环内表面,得到电磁力波作用下的定子原型和各阶模态的定子加速度频谱,对其叠加准确得到了电机的振动响应。
Overcoming the shortcomings of the analytical method and the finite element method in the calculation of electromagnetic force waves, this paper proposed a fast and accurate calculation method for electromagnetic force waves. The static field solver in the finite element software was used to determine the magnetomotive force and air-gap permeance with two finite element simulations, and then obtain the amplitude of each electromagnetic force wave with specific order and frequency. In addition, considering the influence of the stiffness of the stator teeth, this paper calculated the natural frequencies of multiple stator cores, and summarized the fast and accurate equivalent formula for the stator cores. Taking a 6-pole 36-slot variable-speed permanent magnet synchronous motor as an example, the natural frequencies corresponding to its radial modals were analyzed, and the finite element method and the hammer method were used to verify the accuracy of the calculation results. Based on this, this paper predicted the vibration characteristics of the stator with enclosure and verified it by the finite element method. Using the fast and accurate calculation method of electromagnetic force wave and the fast equivalent formula of stator core established in this paper can quickly and accurately predict the vibration characteristics of the stator, which provides convenience for the weakening of electromagnetic vibration in the motor design stage.
作者
邢泽智
王秀和
赵文良
马冠群
XING Zezhi;WANG Xiuhe;ZHAO Wenliang;MA Guanqun(School of Electrical Engineering,Shandong University,Jinan 250061,Shandong Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2021年第14期5004-5013,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51737008)。
关键词
永磁同步电机
电磁激振力波
固有频率
定子振动特性
有限元法
解析法
permanent magnet synchronous motors
electromagnetic force wave
natural frequencies
stator vibration characteristics
finite element method
analytical method
