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1、BRITISH STANDARD BS EN 61185:1997 IEC 61185:1992 (including amendment 1:1995) Magnetic oxide cores (ETD-cores) intended for use in power supply applications Dimensions The European Standard EN 61185:1997 has the status of a British Standard ICS 29.100.10 Licensed Copy: sheffieldun sheffieldun, na, T
2、hu Nov 09 15:28:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61185:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1997 BSI 09-1999 ISBN 0
3、580 27750 X National foreword This British Standard is the English language version of EN 61185:1997. It is identical with IEC 61185:1992 including Amendment 1:1995. The UK participation in its preparation was entrusted to Technical Committee EPL/51, Transformers, inductors, magnetic components and
4、ferrite materials, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developme
5、nts and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of ti
6、me during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their
7、 corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the B
8、SI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summar
9、y of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 14 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front
10、cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 15:28:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61185:1997 BSI 09-1999i Contents Page National forewordInside front cover Foreword2 Text of EN 611853 Licensed Copy: sheffi
11、eldun sheffieldun, na, Thu Nov 09 15:28:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 15:28:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61185 May 1997 ICS 29.100.10 Descriptors: Mag
12、netic oxide cores, ETD-cores, coil formers, pin and base, dimensions, marking English version Magnetic oxide cores (ETD-cores) intended for use in power supply applications Dimensions (IEC 1185:1992 + A1:1995) Noyaux doxydes magntiques (noyaux ETD) destins tre utiliss dans les alimentations Dimensio
13、ns (CEI 1185:1992 + A1:1995) Kerne aus magnetischen Oxiden (ETD-Kerne) fr die Stromversorgung Mae (IEC 1185:1992 + A1:1995) This European Standard was approved by CENELEC on 1997-03-11. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for g
14、iving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three officia
15、l versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committ
16、ees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europ
17、isches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61185:1997 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 15:28:15 G
18、MT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61185:1997 BSI 09-1999 2 Foreword The text of the International Standard IEC 1185:1992 and its amendment 1:1995, prepared by IEC TC 51, Magnetic components and ferrite materials, was submitted to the formal vote and was approved by CENELEC as EN 61185 on
19、1997-03-11 without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex A, Annex B, Annex C and Annex ZA are normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Stand
20、ard IEC 1185:1992 and its amendment 1:1995 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword2 1Scope and object3 2Normative references3 3Conversion system3 4Primary standards3 4.1Dimensions of ETD-cores3 4.2Dimensional limits for coil formers3 4.3Pin loc
21、ations and base outlines3 4.4Pin diameter3 5Marking3 6Mounting4 Annex A (normative) Derived standards9 Annex B (normative) Example of a standard for gauges to check the dimensions of ETD-cores meeting this primary standard11 Annex C (normative) Derivation of formulae for l2and A112 Annex ZA (normati
22、ve) Normative references to international publications with their corresponding European publications14 Figure 1 Pin locations and base outlines viewed from the upper-side of the board (see 4.3)8 Table 1 Dimensions of ETD-cores5 Table 2 Effective parameter and Amin values6 Table 3 Essential dimensio
23、ns of coil formers7 Table A.1 Main dimensions10 Table B.1.1 Gauge dimensions11 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1998-03-01 latest date by which the national standards conflicting with the EN ha
24、ve to be withdrawn(dow) 1998-03-01 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 15:28:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61185:1997 BSI 09-19993 1 Scope and object This International Standard specifies the dimensions that are of importance for mechanical interchangeability fo
25、r ETD-cores made of magnetic oxides, the essential dimensions of coil formers to be used with them, and the effective parameter values to be used in calculations involving them. NOTE 1Whilst this standard mainly applies to magnetic oxide cores, its validity for iron powder cores should not be overlo
26、oked. NOTE 2The cores covered by this standard are designed for use in power transformers and chokes operating at high flux density and generally at frequencies higher than those feasible with EC cores of the same material, due to a core proportioning more suitable for high frequency applications. T
27、hey are generally used in pairs. The use of “derived” standards which give more detailed specifications of component parts whilst still permitting compliance with this standard is discussed in Annex A, which also contains an example of a derived standard for coil formers. 2 Normative references The
28、following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this Intern
29、ational Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents listed below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 205:1966, Calculation of the effective parameters of magnetic piece p
30、arts. IEC 367-1:1982, Cores for inductors and transformers for telecomunications Part 1: Measuring methods. ISO 370:1975, Toleranced dimensions Conversion from inches to millimetres and vice versa. 3 Conversion system 3.1 The original system is the metric system. 3.2 Toleranced dimensions have been
31、converted by applying the rules of method A of ISO 3701). No rule is laid down for the conversion of the nominal value, but in cases where the converted dimensions are given as a nominal dimension with symmetrical tolerance, it is normal practice to state that nominal value with the same number of d
32、ecimal places as the limits. 3.3 Single-limit millimetre dimensions (minimum or maximum) have been converted by applying the appropriate conversion table of ISO 370 and rounding to two more decimal places than the original value in a given column relating to a particular dimension. 4 Primary standar
33、ds Compliance with the following requirements ensures mechanical interchangeability of complete assemblies and coil formers. 4.1 Dimensions of ETD-cores 4.1.1 Principal dimensions The principal dimensions of ETD-cores shall be given in Table 1. NOTEThe dimensions of the cores may be checked by means
34、 of gauges. By way of example, a possible standard for these gauges is given in Annex B. In order to facilitate production it may be necessary to use gauges having dimensions differing from those given in Annex B, although no relaxation of the requirements for the dimensions of the cores given in Ta
35、ble 1 is permitted. 4.1.2 Effective parameter and Amin values The effective parameter values of a pair of cores whose dimensions comply with 4.1.1 shall be as given in Table 2 (see IEC 205 for definitions of these parameters and their calculation; and item 3 of subclause 17.6 of IEC 367-1, for the d
36、efinition of Amin). 4.2 Dimensional limits for coil formers The essential dimensions of coil formers suitable for use with a pair of ETD-cores shall be as given in Table 3. 4.3 Pin locations and base outlines These shall be as shown in Figure 1, in which the base is viewed in the mounting direction,
37、 i.e. from the upper side of the printed wiring board. NOTEThe module, designated as m, shown in the grid plan may be either 2,50 mm or 2,54 mm. 4.4 Pin diameter Coil former terminations (pins) shall be accepted by a gauge having 1,2 mm holes on true position. 5 Marking Where a coil former is fitted
38、 with termination pins conforming to a 2,50 mm module, it shall be clearly and indelibly marked with the letter M, in such a position that it can readily be seen in the completed component. 1) For practical cases, the converted dimensions will normally be given with not more than three decimal place
39、s. The conversion rules may, however, result in more than three decimal places in order to keep the tolerance loss at a minimum. In general, it is left to the users of this standard to apply further rounding, but such further rounding has been introduced where it would not cause the two original mil
40、limetre limits to be exceeded by more than 2,5 % of the tolerance (i.e. the difference between the two limits). Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 15:28:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61185:1997 4 BSI 09-1999 6 Mounting According to their sizes and respective we
41、ights, it is recommended to fix the two largest cores (ETD 54 and ETD 59) on the printed board by means of two screws located at two opposite sides of their coil formers. Concerning smaller sizes such as ETD 19 and ETD 24, no mounting assemblies are defined. It is recommended to fix the two cores by
42、 glue or adhesive tape. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 15:28:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61185:1997 BSI 09-19995 Table 1 Dimensions of ETD-cores SizeETD 19ETD 24ETD 29ETD 34ETD 39ETD 44ETD 49ETD 54ETD 59Units a min. max. 19,1 0,752 20,1 0,791 23,8 0,937 2
43、5,0 0,984 29,0 1,142 30,6 1,205 33,4 1,315 35,0 1,378 38,2 1,504 40,0 1,575 43,0 1,693 45,0 1,772 47,6 1,874 49,8 1,961 53,2 2,094 55,8 2,197 58,4 2,299 61,2 2,409 mm in mm in d2 min. max. 14,4 0,567 15,4 0,606 18,0 0,709 19,2 0,756 22,0 0,866 23,4 0,921 25,6 1,008 27,0 1,063 29,3 1,154 30,9 1,217 3
44、2,5 1,280 34,1 1,343 36,1 1,421 37,9 1,492 40,1 1,579 42,3 1,665 43,6 1,717 45,8 1,803 mm in mm in d3 min. max. 7,2 0,283 7,6 0,299 8,2 0,323 8,8 0,346 9,2 0,362 9,8 0,386 10,5 0,413 11,1 0,437 12,2 0,480 12,8 0,504 14,4 0,567 15,2 0,598 15,9 0,626 16,7 0,657 18,5 0,728 19,3 0,760 21,2 0,835 22,1 0,
45、870 mm in mm in h1 min. max. 13,5 0,531 13,8 0,543 14,3 0,563 14,6 0,575 15,6 0,614 16,0 0,630 17,1 0,6732 17,5 0,6890 19,6 0,7717 20,0 0,7874 22,1 0,8701 22,5 0,8851 24,5 0,9646 24,9 0,9803 27,4 1,079 27,8 1,094 30,8 1,213 31,2 1,228 mm in mm in h2 min. max. 9,2 0,362 9,6 0,378 9,9 0,390 10,3 0,406
46、 10,7 0,421 11,3 0,445 11,8 0,465 12,4 0,488 14,2 0,559 15,0 0,591 16,1 0,634 16,9 0,665 17,7 0,697 18,5 0,728 19,8 0,780 20,6 0,811 22,0 0,866 22,9 0,902 mm in mm in b min. max. 7,2 0,283 7,6 0,299 8,2 0,323 8,8 0,346 9,2 0,362 9,8 0,386 10,5 0,413 11,1 0,437 12,2 0,480 12,8 0,504 14,4 0,567 15,2 0
47、,598 15,9 0,626 16,7 0,657 18,5 0,728 19,3 0,760 21,2 0,835 22,1 0,870 mm in mm in Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 15:28:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61185:1997 6 BSI 09-1999 Table 2 Effective parameter and Amin values Effective parameter and Amin Unit Size
48、 ETD 19ETD 24ETD 29ETD 34ETD 39ETD 44ETD 49ETD 54ETD 59 Core factor mm1 1,253 91,053 70,927 070,814 10,741 60,598 80,542 10,455 010,382 24 Core factor mm328,412 10317,811 10312,139 1038,379 1035,933 1033,458 1032,566 1031,6251 1031,0389 103 Effective magnetic length le mm55,362,370,87993104115127141
49、 Effective cross-sectional area Ae mm2 44,159,276,497125173211280368 Amin (see 17.6.3 of IEC 367-1) mm2 39,555,070,992123172209280366 Effective volume Ve mm3 2 4403 6905 4107 70011 60018 00024 20035 70051 700 NOTE 1The manufacturers may indicate in their catalogues more precise values than those given in the above table. NOTE 2The above values have been calculated using the method given in 3.5 of IEC 205, with the exception of the formula for l2 and A1, where the approximate formulae given in Annex