[目的]齿槽转矩对叶环电驱桨(REDP)的桨盘振动影响很大,为了探究减小REDP齿槽转矩的方法,需要分析槽极数组合、齿槽形状和极弧系数等对齿槽转矩的影响.[方法]首先,根据已有的Ka4-50螺旋桨模型参数及永磁无刷直流电机的设计规范,设计36槽/26极的驱动电机.然后,利用磁路计算软件Maxwell Rmxprt分析不同槽数/极数组合、齿槽形状和极弧系数对齿槽转矩、磁通密度等电机性能的影响.[结果]结果表明:对于分数槽集中绕组电机,槽数与极数的最小公倍数越大,齿槽转矩的幅值越小;在开口槽、闭口槽及半闭口槽等几种齿槽形状中,半闭口槽的齿槽转矩最大,开口槽和闭口槽依次减小;极弧系数对齿槽转矩的影响呈现波动规律,在设计中需要通过具体分析来确定齿槽转矩最小值所对应的极弧系数.[结论]研究成果可为REDP的总体设计提供参考,也可为进一步研究电机对REDP振动噪声的影响提供一定的理论基础.%[Objectives]Cogging torque has an important influence on the blade vibration of a Rim-Elec-tric Driven Propeller(REDP).In order to investigate a method for reducing the cogging torque of REDP, this paper analyzes the combination of slot number,pole number,tooth shape and pole arc coefficient on the influence of cogging torque.[Methods]First,according to the Ka4-50 propeller model parameters and the design standards of the Permanent Magnet Brushless DC Motor,a 36-slot and 26-pole driven mo-tor is designed.The magnetic circuit calculation software Maxwell Rmxprt is then used to analyze the influ-ence of different slot number and pole number combinations,tooth shape and pole arc coefficient on the motor.[Results]The results show that for a frictional slot and concentrated windings motor,the amplitude of the cogging torque is inversely proportional to the lowest common multiple.Among opening slots,closed slots and half-closed slots,half-closed slots have the greatest torque,opening slots have less and closed slots have the least.The influence of pole arc coefficient on cogging torque shows a fluctuation rule.In the design,it is necessary to find the extreme pole arc coefficient corresponding to the minimum value of the cogging torque through specific analysis.[Conclusions]This paper provides references for the overall de-sign of REDP and a theoretical basis for further exploring the influence of the motor on the vibration and noise of REDP.
展开▼
