改变定子铁芯面积对分数槽集中绕组永磁同步电机铁耗的影响

为研究改变定子铁芯面积对分数槽集中绕组永磁同步电机中铁耗的影响,针对定子槽提出了两组研究方案.在8极9槽永磁电机的基础上使用有限元软件,搭建了保证定子槽数不变仅增加定子槽宽整数倍和不改变每个定子槽尺寸仅增加定子槽数的两组电机.介绍了铁耗计算原理并通过仿真对比了两组电机谐波含量、定子轭部磁通密度和在不同转速下的铁耗与永磁...

Influence of changing stator core area on iron loss of FSCW permanentmagnet synchronous machine*

To study the effect of reducing the core area of the stator on the iron loss in the fractional slot concentrated winding (FSCW) permanent magnet (PM) synchronous machine, two sets of research schemes are proposed for the stator slots, which are based on the 8-pole/9-slot PM machine, including only increase integer multiple of the stator slot width and the number of stator slots without changing the stator slot size by finite element analysis (FEA). Then, the principle of iron loss calculation and detailed comparisons of the performance characteristics of the machines are presented that include important issues such as the harmonic of Back EMF, stator yoke flux density, iron loss and eddy current losses in the magnets. With this result, an optimization is carried out to determine the width of stator slot, which reduce the iron loss, magnet eddy current loss and harmonic content without significant decreases in the performance. It is found that properly increasing the width of the stator slot to reduce the influence of iron loss is better than increasing the number of stator slots of the machine. In addition, the torque ripple is affected by the number of slots, it has nothing to do with the area of each slot when the number of stator slots is constant.