This part of IEC 63093 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of PQ-cores and low-profile PQI-cores made of ferrite, and the locations of their terminal pins on a 2,54 mm printed wiring grid in relation to the base outlines of the cores. It also gives guidance on allowable limits of surface irregularities applicable to PQ-cores in accordance with the relevant generic specification.<\/p>\n
The selection of core sizes for this document is based on the philosophy of including those sizes which are industrial standards, either by inclusion in a national standard, or by broad-based use in industry.<\/p>\n
This document is a specification useful in the negotiations between ferrite core manufacturers and customers about surface irregularities.<\/p>\n
The general considerations that the design of this range of cores is based upon are given in Annex A.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4 Primary dimensions 4.1 General 4.2 Dimensions of PQ-cores 4.2.1 Principal dimensions 4.2.2 Effective parameter and Amin values 4.3 Dimensional limits for coil formers 4.4 Pin locations and base outlines 4.5 Pin diameter Figures Figure 1 \u2013 Dimensions of PQ-cores <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Tables Table 1 \u2013 Dimensions of PQ-cores <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Figure 2 \u2013 Dimensions of low-profile PQI-cores Table 2 \u2013 Dimensions of low-profile PQI-cores <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Table 3 \u2013 Effective parameter and Amin values for PQ-cores Table 4 \u2013 Effective parameter and Amin values for low-profile PQI-cores <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Figure 3 \u2013 Main dimensions of coil formers for PQ-cores Table 5 \u2013 Dimensional limits for coil formers for PQ-cores <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5 Mounting Figure 4 \u2013 Pin locations and base outlines viewed from the upper side of the board <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 6 Definitions and limits of surface irregularities 6.1 General 6.2 Examples of surface irregularities 6.3 Chips and ragged edges 6.3.1 General 6.3.2 Chips and ragged edges located on the mating surface Figure 5 \u2013 Examples of surface irregularities <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 6.3.3 Chips and ragged edges located on the other surfaces Figure 6 \u2013 Chips and ragged edges locations <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Table 6 \u2013 Area and length reference of irregularities for visual inspection <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.4 Cracks Figure 7 \u2013 Cracks locations Table 7 \u2013 Limits for cracks <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6.5 Pull-out 6.6 Crystallites 6.7 Flash Figure 8 \u2013 Pull-out location Figure 9 \u2013 Crystallite location <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6.8 Pores Figure 10 \u2013 Flash location Figure 11 \u2013 Pore location <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Annex A (informative)PQ-cores design <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Annex B (informative)Examples of allowable areas of chips Table B.1 \u2013 Allowable areas of chips in mm2 <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Annex C (normative)Example of a gauge to check the dimensions of PQ-coresmeeting the primary dimensions C.1 General Figure C.1 \u2013 Gauge dimensions Table C.1 \u2013 Gauge dimensions <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | C.2 Procedure and requirements <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Ferrite cores. Guidelines on dimensions and the limits of surface irregularities – PQ-cores<\/b><\/p>\n |