近极槽数表贴式永磁同步电机齿顶漏磁分析与计算

Analysis and Calculation of Zigzag Leakage Flux in Surface-Mounted PM Synchronous Machines with Similar Number of Poles and Slots

近极槽数表贴式永磁同步电机的齿顶漏磁比较大,凭传统经验选取齿顶漏磁系数,再利用有限元软件仿真的方法延长了电机设计周期,即齿顶漏磁的快速、准确计算十分必要。根据半单元电机内每个齿的齿顶漏磁各自不同的特点,提出了平均每极齿顶漏磁的计算方法。将半单元电机内的所有齿的齿顶漏磁规算到每个磁极下,推导出了平均每极齿顶漏磁和齿顶漏磁系数的解析表达式。在此基础上进一步研究了电机极数和极弧系数的变化对齿顶漏磁系数的影响。平均每极齿顶漏磁解析法计算结果与有限元软件仿真结果一致,验证了平均每极齿顶漏磁计算方法的正确性和准确性。

The zigzag leakage flux of surface-mounted permanent magnetic synchronous machines（PMSM） with similar pole and slot number is bigger than other kinds of electric machines.The traditional method,which chooses the zigzag leakage coefficient with experience and then is verified with finite element software,prolonged the design period of motor in general.Therefore,the method to calculate the zigzag leakage flux promptly and accurately is necessary.The method to calculate the average zigzag leakage flux per pole is proposed according to the different characteristics of the zigzag leakage flux per tooth in the semi-cell electric machine.Analytic expression of the average zigzag leakage flux of per pole and the zigzag leakage coefficient is deduced by converting the zigzag leakage flux of all teeth in semi-cell electric machine to per pole.And based on analytic expressions,the further study of the influences to the zigzag leakage coefficient when the pole number and pole-arc coefficient of the electric machine are changed is done.The results of analytic calculation of the average zigzag leakage flux per pole are accordant with the simulation ones.These results prove that the method to calculate the average zigzag leakage flux of per pole is correct and accurate.