磁性元件部分有效参数的计算

[中文适用范围]： IEC 60205:2026 规定了铁磁材料闭合回路有效参数计算的统一规则。与上一版本相比，本版包含以下重要技术变更：a) 在5.1节中增加了一组矩形 - 圆形截面的 URS 磁芯的图形及其公式；b) 在5.9、5.10、5.11和5.13节中，采用包含“B1‑D"的传统计算公式时，仅限于 x‑x 型磁芯（x 为 EL、ER、PQ 或 E），并新增针对 x‑PLT 型磁芯的公式，将原"B1‑D"替换为"(B1‑D+B2)/2"；c) 在5.9、5.10、5.11和5.13节中，新增 x‑PLT 型磁芯（x 为 EL、ER、PQ 或 E）的 l1 和 l3 计算公式，该公式不同于 x‑x 型磁芯的 l1 和 l3；d) 在5.2.1至5.14节各子条款中增加最小有效截面积 Amin 的计算公式。 [外文原描述]： IEC 60205:2026 specifies uniform rules for the calculation of the effective parameters of closed circuits of ferromagnetic material. This edition includes the following significant technical changes with respect to the previous edition: a) addition, in 5.1, of the drawing and the formulae of pair of URS-cores of rectangular-circular section; b) using, in 5.9, 5.10, 5.11 and 5.13, the conventional calculation formula that includes "B1‑D" is limited for the x-x cores (x is EL, ER, PQ or E) and addition new formulae for x‑PLT cores that replaces "B1-D" with "(B1-D+B2)/2"; c) addition, in 5.9, 5.10, 5.11 and 5.13, of formulae of l1 and l3 for x-PLT cores (x is EL, ER, PQ or E) which is different from the l1 and l3 of x-x cores; d) addition of formula Amin in each subclause from 5.2.1 to 5.14.