圆弧边界单元及其在旋转电机磁场计算中的应用

Arc Boundary Elements and Their Application to the Calculation of Magnetic Field in Rotary Electric Machines

本文提出圆弧边界单元和扇形内部单元的新的剖分方法,从而更准确地描述电机类旋转电气设备中电磁场场域几何形状,提高数值计算精度。在计算圆弧单元的奇异积分中采用级数展开方法。对大型汽轮发电机空载磁场的实例计算表明,圆弧边界单元具有剖分简单、精度高等优点。

The paper presents a new discretization way with arc boundary elements and sector inner elements,to express more accurately the boundary geometry of electromagnetic fields in rotating devices of electric machines and to increase accuracy of calculation value.Series expansion is used for calcuting the singular integral of arc elements.The example of calculating the excitation field at no-load for a large turbogenerator shows that the advantages of arc elements are highly accurate and easy to use.