摘要
磁力同步耦合器能够通过磁场以非接触的方式实现力矩的传递,具有天然的过载保护和隔振功能,但同时,内外永磁转子的软连接,使得内磁转子易于受到负载的波动而产生振动,影响到了磁力同步耦合器工作的平稳性及可靠性。针对这一问题,采用层模型法将磁力同步耦合器分为了内、外永磁体区域及气隙区域等3个子区域,基于Maxwell方程组建立各区域的二维解析模型,采用分离变量法求解出了各区域内磁场分布,结合Maxwell应力张量法建立了磁力矩及扭转刚度方程,考察磁力同步耦合器负载端受到恒定力矩激励下,磁极对数及负载载荷对内磁转子运动的影响。结果表明,随着磁极对数的增加,耦合器初始扭转刚度先增大后减小,内磁转子振动幅值先减小后增大;同时随着负载增大扭转刚度逐步下降,负载到达最大工作转矩时扭转刚度趋于0,内磁转子振动幅值逐步达到最大。
The permanent magnet synchronous coupling(PMSC)can transmit torque through a magnetic field without physical contact.Thus,it has the natural characteristics of overload protection and vibration isolation.However,at the same time,the soft connection between the inner and outer permanent magnet rotor makes it easy for the inner magnetic rotor to be subjected to load fluctuations and vibration,affecting the stability and reliability of the PMSC.Aiming at this problem,A layer model method was adopted to divide the PMSC into three subdomains:the inner permanent magnet subdomain,the outer permanent magnet subdomain and the air gap subdomain.A two-dimensional analytic model in each subdomain was composed based on Maxwell equations,and the magnetic field distribution in each subdomain was calculated by the separation of variables method,and the magnetic torque and torsional stiffness equations were obtained by the Maxwell stress tensor method.The influence of the magnetic pole number and torque load on the motion of the inner magnetic rotor under constant torque excitation was studied.The results show that with the increase of magnetic pole pair number,the initial torsional stiffness of the PMSC increases at first and then decreases,and the vibration amplitude of the inner magnetic rotor changes on the contrary.At the same time,with the increase in torque load,the torsional stiffness gradually decreases.When the torque load reaches the maximum working torque,the torsional stiffness tends to 0,and the vibration amplitude of the inner magnetic rotor gradually increases to the maxim.
作者
刘锟
崔翃彪
高寒阳
胡国新
LIU Kun;CUI Hong-biao;GAO Han-yang;HU Guo-xin(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Mechanical Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)
出处
《磁性材料及器件》
2025年第3期77-85,共9页
Journal of Magnetic Materials and Devices
基金
国家自然科学基金面上项目(51876052)。
关键词
磁力同步耦合器
磁感应强度
磁力矩
扭转刚度
力学性能
permanent magnet synchronous coupling(PMSC)
magnetic flux density
magnetic torque
torsional stiffness
mechanical performance
