磁性元件有效参数计算

[中文适用范围]： IEC 60205:2026（CMV版）同时收录了该标准的正式文本及其带有注释的版本。注释版提供便捷、直观的方式，用于对比2026年版（第5.0版）与2016年版（第4.0版）之间的全部修订内容。此外，还汇集了IEC TC 51领域专家的意见，用以阐明重大修订的原因，或对内容中某些部分进行澄清。 本标准规定了铁磁材料闭合电路有效参数计算的统一规则。与前一版相比，本版主要技术变更包括：a）在第5.1条中增加矩形 - 圆形截面U型磁芯（URS-cores）的图示及计算公式；b）在第5.9、5.10、5.11和5.13条中，原采用含"B1‑D"的传统计算公式仅适用于x-x型磁芯（x可为EL、ER、PQ或E），并新增针对x-PLT型磁芯的计算公式，将"B1-D"替换为"(B1-D+B2)/2"；c）在第5.9、5.10、5.11和5.13条中，新增x-PLT型磁芯（x可为EL、ER、PQ或E）的l1和l3计算公式，该公式不同于x-x型磁芯的相应参数；d）在第5.2.1至5.14各子条款中新增最小有效截面积Amin的计算公式。 [外文原描述]： IEC 60205:2026 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60205:2026 edition 5.0 and the previous IEC 60205:2016 edition 4.0. Furthermore, comments from IEC TC 51 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content. 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.