摘要
磁场调制型磁力齿轮可以有效避免振动、噪声、润滑等问题。为提高传动稳定性,提出一种采用偏心磁极的新型磁场调制型磁力齿轮。首先,用解析法分析了加入调磁极片前、后的磁场调制作用,得到了永磁磁场经过调制后的气隙磁密表达式;其次,对偏心磁极的主要结构参数进行定义,推导了偏心磁极磁化厚度的函数表达式;然后,利用有限元软件仿真分析磁力齿轮采用偏心磁极前、后对气隙磁场的影响,对气隙磁密波形进行傅里叶分解并计算谐波畸变率;最后,对调磁极片极弧系数、永磁体偏心距、永磁体极弧系数与气隙磁密和最大静态转矩之间的关系进行参数分析,并制作了偏心距为0的磁力齿轮样机,进行理论与仿真分析验证。结果表明,偏心磁极结构能够有效改善气隙磁密波形,提高传动稳定性。
Field modulated magnetic gears can effectively avoid vibration,noise,lubrication and other problems.In order to improve the transmission stability,a new type of field modulated magnetic gear using eccentric poles was proposed.Firstly,the magnetic field modulation effect before and after adding the magnetic field modulating pole piece was analyzed by analytical method,and the expression of the air-gap magnetic density was obtained after the modulation of the permanent magnetic field.Secondly,the main structural parameters of the eccentric pole were defined,and the functional expression of the magnetization thickness of the eccentric pole was deduced.Then,the effect of the magnetic field on the air-gap magnetic gear before and after adopting the eccentric magnetic pole was analyzed by using the simulation of the finite element software,and applied Fourier decomposition to the waveform of the air-gap magnetic density for calculating total the harmonic distortion.Finally,the parametric analysis of the relation between the pole-arc coefficient of the modulating pole piece,the eccentricity of the permanent magnet,the pole-arc coefficient of the permanent magnet and the air gap magnetic density and the maximum static torque was carried out,and a prototype of the magnetic gear with an eccentricity of 0 was fabricated to validate the theoretical and simulative analyses.The results show that the structure of the eccentric poles can improve the waveform of air-gap magnetic density effectively and improve the stability of the transmission.
作者
杨超君
郭亚飞
阮孙意
YANG Chaojun;GUO Yafei;RUAN Sunyi(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China;State Key Laboratory of Mechanical Transmission for Advanced Equipment,Chongqing University,Chongqing 400044,China)
出处
《机械强度》
北大核心
2025年第11期10-18,共9页
Journal of Mechanical Strength
基金
高端装备机械传动全国重点实验室开放基金项目(SKLMT-MSKFKT-202331)。
关键词
偏心磁极
磁力齿轮
气隙磁密
谐波畸变率
Eccentric pole
Magnetic gear
Air gap magnetic density
Total harmonic distortion
