永磁同步电机分数槽集中绕组磁动势.pdfVIP

20 10 年 10 月 电 工 技 术 学 报 Vol.25 No. 10 第 25 卷第 10 期 TRAN SACTION S OF CHINA ELECTROTECHNICAL SOCIETY Oct . 20 10 永磁同步电机分数槽集中绕组磁动势 陈益广 潘玉玲 贺鑫 （天津大学电气与自动化工程学院 天津 300072） 摘要 对单元电机的单个线圈、线圈组、相绕组和三相绕组的磁动势进行 分析。当定子 槽数为奇数时，除3 的整倍数之外其他极对数的磁动势都存在，其中与基波绕组系数相同、转 向相反、幅值最大的谐波极对数仅与基波相差 1 对极。当定子槽数为偶数时,除偶数和3 的整倍 数之外其他极对数的磁动势都存在,其中与基波绕组系数相同、转向相反、幅值最大的谐波极对 数仅与基波相差2 或者4 对极。电机内部还存在幅值较大的次谐波以及绕组系数与基波相同的 高次谐波，它们会对电机造成不良影响。电机高速运行时，这些谐波磁动势产生的磁场会在永 磁体内感应出涡流，产生损耗，造成永磁体温升增加，甚至去磁。 关键词：永磁同步电机 分数槽 集中绕组 磁动势 谐波分析 中图分类号：TM340 Magnetomotive Force in Permanent Magnet Synchronous Machine With Concentrated Fractional-Slot Winding Chen Yig uang Pan Yuling H e X in （Tianj in University Tianj in 300072 China ） Abstract An analysis is carried out on magnetomotive force (MMF) of the single coil, coil group , phase winding and the three-phase winding of cell permanent magnet synchronous machine with fractional-slot concentrated winding. When the stator slot number is odd, all the MMF exist besides the pole-pairs number is 3 multiple, which have the same fundamental wave winding coefficient, reverse rotatining, and the pole-pairs number corresponding to the harmonic with the largest amplitude misses only one with that of the fundamental wave. And when the stator slot number is even, all the MMF exist besides the pole-pairs number is even or 3 multiple, which have the same fundamental wave winding coefficient, reverse rotatining, and the pole-pairs number corresponding to the harmonic with the largest amplitude misses only 2 or 4 with that of the fundamental wave. Both the subharmonics with bi