Finite-Element Modeling and Measurements of Flux and Eddy Current Distribution in Toroidal Cores Wound From Electrical Steel
Finite-Element Modeling and Measurements of Flux and Eddy Current Distribution in Toroidal Cores Wound From Electrical Steel
复制标题
电工钢绕制环形磁芯中磁通和涡流分布的有限元建模和测量
DOI：
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发表时间：
2008
影响因子：
2.1
通讯作者：
A. J. Moses
中科院分区：
文献类型：
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作者：
Stan Zurek;Faris Al;A. J. Moses
尽管缠绕环形几何形状明显相对简单，但由于对层压铁芯或螺旋几何形状进行建模所需的固有网格尺寸较大，因此数值建模技术非常难以实施。计算能力的最新进步使得此类设备的模拟和研究变得更加可行。对由晶粒取向电工钢缠绕的环形磁芯进行有限元建模，以准确地表示其磁路，从而计算内部磁通量分布、其与磁芯几何形状的相互作用，并能够预测相关的磁损耗。总体磁通分布趋势与相同磁芯的测量结果一致。还计算了层间通量和相关的感应平面涡流。测量是使用一系列每五匝环绕的搜索线圈进行的。在每种情况下，磁芯均在高达 1.5 T 的受控正弦磁通密度下以 50 和 400 Hz 的频率进行磁化。
Despite the apparent relative simplicity of the wound toroidal geometry, numerical modeling techniques are very difficult to implement due to the inherent large mesh size required to model a laminated core or spiral geometry. Recent advancements in computing capabilities have made the simulation and the study of such devices more feasible. Finite-element modeling of toroidal cores wound from grain-oriented electrical steel was conducted to accurately represent their magnetic circuits in order to calculate the internal magnetic flux distribution, its interaction with core geometry, and to be able to predict the associated magnetic losses. The general flux distribution trends agree with measured results from identical cores. The interlaminar flux and the associated induced planar eddy currents were also calculated. The measurements were performed using a series of search coils enclosing every five turns. In each case, the core was magnetized at 50 and 400 Hz under controlled sinusoidal flux density up to 1.5 T.