Effects of stress on iron loss and flux distribution of an induction motor stator core
Effects of stress on iron loss and flux distribution of an induction motor stator core
复制标题
应力对感应电机定子铁心铁损和磁链分布的影响
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
H. Rahmatizadeh
中科院分区：
文献类型：
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作者：
A. Moses;H. Rahmatizadeh
比较了两种无取向低硅铁芯。叠片被磁化，如在感应电动机定子芯中一样，并且使用安装在各个叠片上的搜索线圈和晶闸管阵列在各种磁通密度下测量磁通密度和局部功率损耗。施加到芯外部的高达4 MPa的均匀静态径向应力增加了所有测量点的局部损耗。最大增幅约为35%，紧随插槽之后。通常，在2MPa左右出现急剧增加。功率损耗的变化可能与所施加的应力有关，这导致磁通密度的切向分量在齿后减小而在槽后增大。因此，施加的应力使空间磁通密度的轨迹在齿后更圆，在槽后更椭圆。局部谐波分量的磁通密度普遍增加，在两个核心时，施加应力。>
Two nonoriented low-silicon iron cores were compared. The laminations were magnetized as in an induction motor stator core, and the flux density and localized power loss measured at various flux densities using arrays of search coils and thermistors mounted on individual laminations. A uniform static radial stress of up to 4 MPa applied to the outside of the core increased the local loss at all measurement points. The maximum increase was around 35% immediately behind the slots. Generally, a sharp increase occurred at around 2 MPa. The change in power loss can be related to the applied stress, which causes the tangential component of flux density to decrease behind teeth and increase behind slots. As a result, the applied stress makes the loci of spatial flux density more circular behind the teeth and more elliptical behind the slots. Localized harmonic components of flux density were generally increased in both cores when stress was applied. >