高速内置式永磁电机转子机械强度研究

发布时间：2018-03-19 14:39

本文选题：内置式永磁电机　切入点：高速　出处：《电机与控制学报》2015年11期 　论文类型：期刊论文

【摘要】：为了研究高速内置式永磁电机转子机械强度,根据受力平衡原理,推导了极端情况下内置式高速永磁电机转子隔磁桥最大应力的解析计算公式。利用该解析公式和有限元方法分别分析了隔磁桥宽度对最大应力的影响规律,得到解析解和有限元计算结果最大偏差在7.5%以内,证明了解析推导的正确性。通过将永磁体沿圆周方向进行分段,增加隔磁桥的数量,将应力分散到多个隔磁桥上,以减小应力最大值。利用有限元方法分析了永磁体不分段、分两段和分三段时转子强度和空载漏磁因数,通过与未分段进行对比,永磁体分两段和分三段时隔磁桥最大应力分别减小58.5%和71.2%,而空载漏磁因数随着分段数增加而增大。
[Abstract]:In order to study the mechanical strength of high speed built-in permanent magnet motor rotor, according to the principle of force balance, The analytical formula for calculating the maximum stress of the rotor magnetic isolation bridge of the built-in high-speed permanent magnet motor in extreme cases is derived. The influence of the width of the magnetic barrier bridge on the maximum stress is analyzed by using the analytical formula and the finite element method, respectively. The maximum deviation between the analytical solution and the finite element calculation results is less than 7.5%, which proves the correctness of the analytical derivation. By dividing the permanent magnet along the circumferential direction, the number of magnetic isolating bridges is increased, and the stress is dispersed over several magnetic isolating bridges. In order to reduce the maximum stress, the rotor strength and no-load flux leakage factor are analyzed by finite element method when the permanent magnet is not segmented, divided into two segments and three sections. The maximum stress of the bridge is reduced by 58.5% and 71.2, respectively, while the no-load flux leakage factor increases with the increase of the number of segments.
【作者单位】：沈阳工业大学国家稀土永磁电机工程技术研究中心;
【基金】：国家自然科学基金(51307111) 国家科技支撑计划项目(2013BAE08B00) 辽宁省教育厅科学技术研究项目(L2013049)
【分类号】：TM351;TG659

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