IEC 63182-2:20 20规定了由磁粉制成的环芯（也称为环形）的优选范围对机械互换性很重要的尺寸、在涉及它们的计算中使用的有效参数值，并给出了适用于涂层环芯的表面不规则性允许极限的指南。 本文档核心尺寸的选择基于包括工业标准尺寸的理念，这意味着它们在行业内广泛使用。本文件被认为是在磁粉芯制造商和用户之间关于表面不规则性的谈判中有用的部分规范。

IEC 63182-2:2020 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of ring-cores (also called toroids) made of magnetic powder, the effective parameter values to be used in calculations involving them, and gives guidelines on allowable limits of surface irregularities applicable to coated ring-cores.
The selection of core sizes for this document is based on the philosophy of including those sizes which are industrial standards, meaning that they are in broad-based use within the industry. This document is considered as a sectional specification useful in the negotiations between magnetic powder core manufacturers and users about surface irregularities.