GB/T 44069.4-2024 English PDF

US$654.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 44069.4-2024: Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 44069.4-2024	654	Add to Cart	5 days	Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores	Valid

Similar standards

GB/Z 40842   GB/T 36103.1   SJ/T 10410   GB/T 43795   GB/T 44058   

Basic data

Standard ID: GB/T 44069.4-2024 (GB/T44069.4-2024)
Description (Translated English): Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L19
Word Count Estimation: 32,384
Date of Issue: 2024-05-28
Date of Implementation: 2024-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 44069.4-2024: Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 29.100.10 CCSL19 National Standards of People's Republic of China Replaces GB/T 9634.2-2002 Guidelines for ferrite core dimensions and surface defect limits Part 4.RM cores Part 4.RM-cores (IEC 63093-4.2019,IDT) Released on 2024-05-28 2024-12-01 implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Main dimensions 1 4.1 General 1 4.2 Dimensions of RM cores 2 4.3 Main dimensions of the coil frame 2 4.4 Pin location and bottom outline 2 4.5 Circlip groove 2 4.6 Stud slot 2 5 Installation14 6 Limits of surface defects 14 6.1 Overview 14 6.2 Surface Defect Examples 14 6.3 Chipped blocks and irregular edges 14 6.4 Cracks 17 6.5 Sticking mold 19 6.6 Crystal Spots 19 6.7 Flash 20 6.8 Air hole 20 Appendix A (Informative) Design of RM-type core 22 A.1 General 22 A.2 Pin location and bottom outline 22 A.3 Design considerations and dimensions 22 A.4 Practical considerations 22 Appendix B (normative) Guidelines for clamping force related to RM core measurements 23 B.1 Measurement conditions and clamping force 23 B.2 Clamping Step 23 Appendix C (Informative) Example of allowable block drop area 25 Reference 26 Figure 1 Dimensions of RM core Figure 2 Dimensions of low profile RM core 4 Figure 3 Dimensions of the circlip groove 6 Figure 4 Dimensions of stud slot 7 Figure 5 Main dimensions of RM core coil frame 8 Figure 6 Pin positions and bottom contour lines seen from the bottom of the printed circuit board 10 Figure 7 Frame size for specific models 12 Figure 8 Pin positions and bottom contour lines seen from the bottom of the printed circuit board 13 Figure 9 Surface defect example Figure 14 Figure 10 Blocks falling off the mating surface 15 Figure 11 Crack location (top view) 17 Figure 12 Crack location (bottom view) 17 Figure 13 Dimension W 19 Figure 14 The location of the mold sticking 19 Figure 15.Sticking mold 19 in the circlip groove area Figure 16 The location of the crystal spot 20 Figure 17 The position of the flash edge 20 Figure 18 The location of the pores 21 Figure B.1 Clamping device 23 Table 1 Dimensions of RM cores 3 Table 2 Dimensions of low profile RM cores 4 Table 3 Effective parameters and Amin values of RM cores 5 Table 4 Effective parameters and Amin values of low profile RM cores 5 Table 5 Dimensions of circlip groove 7 Table 6 Dimensions of stud slots 8 Table 7 Main dimensions of RM core coil frame 9 Table 8 Main dimensions of low profile RM core coil frame 9 Table 9 Frame sizes for specific models 12 Table 10 Reference area and length of visual defects 16 Table 11 Crack limit 18 Table 12 Dimensions W 18 Table B.1 Inner diameter and recommended clamping force 24 Table C.1 Example of allowable block drop area 25

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is Part 4 of GB/T 44069 "Guidelines for Dimensions and Surface Defect Limits of Ferrite Cores". GB/T 44069 has been The following parts were published. --- Part 4.RM type core. This document replaces GB/T 9634.2-2002 "Guidelines for surface defect limits of ferrite cores Part 2.RM cores" and Compared with GB/T 9634.2-2002, in addition to structural adjustments and editorial changes, the main technical changes are as follows. --- Changed the scope of the document (see Chapter 1, Chapter 1 of GB/T 9634.2-2002); ---Added important dimensions related to mechanical interchangeability for the preferred series RM cores and low-profile RM cores made of ferrite dimensions, and the coil bobbin lead pin locations relative to the core bottom contour on a 2.54 mm PCB grid. (See Chapter 4); --- Added the installation of RM type core (see Chapter 5); --- Added defect limits for crystal spots and pores (see 6.6, 6.8). This document is equivalent to IEC 63093-4.2019 "Guidelines for dimensional and surface defect limits of ferrite cores Part 4.RM type core". The following minimal editorial changes were made to this document. --- Added introductory words for the items (see 6.3.3, 6.6, 6.8); ---Change a column item with only one item to a segment (see 6.7); --- IEC 63093-2 replaces the obsolete IEC 61317-2 (see A.3). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This document is under the jurisdiction of the National Technical Committee for Standardization of Magnetic Components and Ferrite Materials (SAC/TC89). This document was drafted by. Hengdian Group Dongmei Co., Ltd., China Electronics Technology Standardization Institute, Maanshan Xinkangda Magnetics Co., Ltd. Co., Ltd., Tiantong Holdings Co., Ltd., Zhejiang Institute of Metrology, Hai'an Yingqiu Magnetic Components Co., Ltd., Shandong Chun Opto-Magnetic Technology Co., Ltd. The main drafters of this document are. Zhang Aiguo, Cui Ying, Zhao Guang, Song Yanyan, Yu Zhishu, Yin Jinxi, Song Xinglian, Zhang Xiaohang, Bao Daxin, Zhu Dongmei, Jia Junchao. The previous versions of this document and the documents it replaces are as follows. ---GB/T 9634.2-2002.

Introduction

Due to the manufacturing method and the physical characteristics of the product, ferrite cores will have a certain degree of physical defects, such as falling pieces, irregular edges, Cracks, flash and sticking. The tolerance of these surface defects depends mainly on the defect type, location and size and the structure of the core. GB/T 44069 "Guidelines for the Limits of Ferrite Core Sizes and Surface Defects" mainly specifies the core series (such as RM cores, pot cores, E GB/T 44069 is intended to consist of fifteen parts. --- Part 1.General specifications. The purpose is to establish general principles for the dimensional description and surface defect limitation of ferrite cores. --- Part 2.Pot cores for communications, power supplies and filters. The purpose is to establish the dimensions and surface defect tolerances of pot cores. limit. --- Part 3.Ferrite half-pot cores for inductive proximity switches. The purpose is to establish the dimensions and surface defects of half-pot cores. Allowable limit. --- Part 4.RM type core. The purpose is to establish the size and surface defect tolerance limits of RM type core. --- Part 5.EP cores and accessories for inductors and transformers. The purpose is to establish the dimensions and surface defects of EP cores. The permissible limit. --- Part 6.ETD type cores for power supplies. The purpose is to establish the dimensions and surface defect tolerances of ETD type cores. --- Part 7.EER type core. The purpose is to establish the size and surface defect tolerance limits of EER type core. --- Part 8.E-type core. The purpose is to establish the size and surface defect tolerance limits of E-type cores. --- Part 9.Planar magnetic cores. The purpose is to establish the dimensions and surface defect tolerances of planar magnetic cores. --- Part 10.PM cores and their accessories. The purpose is to establish the size and surface defect tolerance limits of PM cores. --- Part 11.EC cores for power supplies. The purpose is to establish the permissible limits for dimensions and surface defects of EC cores. --- Part 12.Toroidal cores. The purpose is to establish the dimensions and surface defect tolerances of toroidal cores. --- Part 13.PQ type core. The purpose is to establish the size and surface defect tolerance limits of PQ type core. --- Part 14.EFD core. The purpose is to establish the size and surface defect tolerance limits of EFD core. --- Part 15.U-shaped core. The purpose is to establish the size and surface defect tolerance limits of U-shaped core. After years of development and improvement, the RM core has an optimized structure and size and is the preferred component for electronic transformers, inductors, etc. However, the core has many specifications, which is not conducive to manufacturing management and optimization of the design process. Surface defects such as cracks, falling blocks, and pores generated during the production process The trap will affect its final electromagnetic performance, thus affecting the final use effect of the magnetic device. This document mainly specifies the dimensions of the RM type magnetic core and surface defect tolerance limits, helping companies in this field to improve technical specifications, improve product quality, standardize production and trading behaviors, and promote The healthy development of the industry and even the industry. Guidelines for ferrite core dimensions and surface defect limits Part 4.RM cores

1 Scope

This document specifies the important aspects of mechanical interchangeability of a preferred range of RM cores and low profile RM cores made of ferrite. dimensions, and the position of the coil bobbin lead pins relative to the core bottom contour on a 2.54 mm PCB grid, and According to relevant general specifications, guidelines for the permissible limits of surface defects on RM cores are also given. The selection of core specifications in this document is based on the principle that these specifications are standard specifications commonly used in the industry or have been included in national standards. It is accurate or has a broad industrial application base. This document is intended to be used as a guideline in negotiations between core manufacturers and users concerning surface defects. Appendix A gives general considerations for designing this type of core.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. parts) Note. GB/T 20874-2007 Calculation of effective parameters of magnetic parts (IEC 60205.2001, IDT) IEC 60401-1 Soft ferrite cores - Terms and definitions - Part 1.Terms and no- Note. GB/T 28864.1-2012 Definitions of terms for soft ferrite cores Part 1.Terms for physical defects (IEC 60401-1.2002, IDT) IEC 63093-11) Ferrite cores - Guidelines for dimensions and surface imperfection limits - Part 1.General specifications 1) IEC 60424-1 has been replaced by IEC 63093-1.The references in this document are still applicable. Note. GB/T 9634.1-2002 Guidelines for surface defect limits of ferrite cores Part 1.General (IEC 60424-1.1999, IDT)

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in IEC 60401-1 and IEC 63093-1 apply. ISO and IEC maintain terminology databases for use in standards at the following addresses.

4 Main dimensions

4.1 General The following requirements shall be met to ensure mechanical interchangeability of the complete core assembly and the coil former. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 44069.4-2024_English be delivered?

Answer: Upon your order, we will start to translate GB/T 44069.4-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 44069.4-2024_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 44069.4-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.