1、BS ISO 7637-3:2016 Road vehicles Electrical disturbances from conduction and coupling Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 7637-3:2016
2、BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 7637-3:2016. It supersedes BS ISO 7637-3:2007 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AUE/16, Data Communication (Road Vehicles). A list of organizations
3、represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN
4、978 0 580 78592 4 ICS 43.040.10 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2016. Amendments/corrigenda issued since publication Date T e x t a f f
5、e c t e dBS ISO 7637-3:2016 ISO 2016 Road vehicles Electrical disturbances from conduction and coupling Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines Vhicules routiers Perturbations lectriques par conduction et par couplage Partie 3:
6、 Transmission des perturbations lectriques par couplage capacitif ou inductif le long des lignes autres que les lignes dalimentation INTERNATIONAL STANDARD ISO 7637-3 Third edition 2016-07-01 Reference number ISO 7637-3:2016(E)BS ISO 7637-3:2016ISO 7637-3:2016(E)ii ISO 2016 All rights reserved COPYR
7、IGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, wi
8、thout prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.i
9、so.orgBS ISO 7637-3:2016ISO 7637-3:2016(E)Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Test methods . 2 4.1 General . 2 4.2 Standard test conditions . 3 4.3 Ground plane 3 4.4 General test setup conditions . 3 4.5 CCC method 3 4.5.1 General 3 4.5.2 G
10、enerator verification . 3 4.5.3 Transient pulses level adjustment 4 4.5.4 DUT test . 4 4.6 DCC method . 5 4.6.1 General 5 4.6.2 Generator verification . 6 4.6.3 Transient pulses level adjustment 6 4.6.4 DUT test . 7 4.7 ICC method 11 4.7.1 General.11 4.7.2 Generator verification 11 4.7.3 Transient p
11、ulses level adjustment .11 4.7.4 DUT test 12 5 T est instrument description and specification 14 5.1 Power supply .14 5.2 Oscilloscope 15 5.3 Transient pulses generator .15 5.3.1 General.15 5.3.2 Slow transient pulses test 2a 15 5.3.3 Fast transient pulses 3a and 3b test .16 5.4 CCC fixture .18 5.5
12、DCC fixture .20 5.6 ICC fixture .20 Annex A (normative) Calibr ation fixtur e used for the IC C t est method 21 Annex B (informative) Example of test severity levels associated with functional performanc e status classification .22 Annex C (informative) Estimation of the inductive coupling factor 24
13、 ISO 2016 All rights reserved iii Contents PageBS ISO 7637-3:2016ISO 7637-3:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out thro
14、ugh ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collabor
15、ates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval
16、criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subje
17、ct of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade
18、 name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Tec
19、hnical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information. The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 32, Electrical and electronic components and general system aspects. This third edition cancels and replaces the second
20、 edition (ISO 76373:2007), which has been technically revised. ISO 7637 consists of the following parts, under the general title Road vehicles Electrical disturbances from conduction and coupling: Part 1: Definitions and general considerations Part 2: Electrical transient conduction along supply lin
21、es only Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines The following parts are under preparation: Part 4: Electrical transient conduction along shielded high voltage supply lines only Part 5: Enhanced definitions and verification meth
22、ods for harmonization of pulse generators according to ISO 76372 Technical Report Annex A forms an integral part of this part of ISO 7637. Annex B and Annex C are informative.iv ISO 2016 All rights reservedBS ISO 7637-3:2016ISO 7637-3:2016(E) Introduction The fast transient pulse test uses bursts co
23、mposed of a number of fast transient pulses, which are coupled into lines (I/O lines in particular) of electronic equipment. The fast rise time, the repetition rate and the low energy of the fast transient bursts are significant to the test. The slow transient pulse test applies a number of single p
24、ulses, as used for conducted transient pulse test, to the DUT. ISO 2016 All rights reserved vBS ISO 7637-3:2016BS ISO 7637-3:2016Road vehicles Electrical disturbances from conduction and coupling Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supp
25、ly lines 1 Scope This part of ISO 7637 defines bench test methods to evaluate the immunity of devices under test (DUTs) to transient pulses coupled to lines other than supply lines. The test pulses simulate both fast and slow transient disturbances caused by the switching of inductive loads and rela
26、y contact bounce. The following three test methods are described in this part of ISO 7637: capacitive coupling clamp (CCC) method; direct capacitive coupling (DCC) method; inductive coupling clamp (ICC) method. This part of ISO 7637 applies to road vehicles fitted with nominal 12 V or 24 V electrica
27、l systems. For transient pulses immunity, Annex B provides recommended test severity levels in line with the functional performance status classification (FPSC) principle described in ISO 7637-1. 2 Normative references The following documents, in whole or in part, are normatively referenced in this
28、document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7637-1, Road vehicles Electrical disturbances from conduction and coupling Part 1: D
29、efinitions and general considerations ISO 7637-2, Road vehicles Electrical disturbances from conduction and coupling Part 2: Electrical transient conduction along supply lines only ISO 11452-4, Road vehicles Component test methods for electrical disturbances from narrowband radiated electromagnetic
30、energy Part 4: Harness excitation methods 3 T erms a nd definiti ons For the purposes of this document, the terms and definitions given in ISO 7637-1 apply. INTERNATIONAL ST ANDARD ISO 7637-3:2016(E) ISO 2016 All rights reserved 1BS ISO 7637-3:2016ISO 7637-3:2016(E) 4 Test methods 4.1 General This C
31、lause describes bench test methods for testing the immunity of electrical system components or devices under test (DUTs) against coupled transient pulses. These tests shall be performed in the laboratory. The defined transient pulses represent the characteristics of most of the known transient pulse
32、s which may occur in the vehicle. Some transient pulse tests may be omitted if a device, depending on its function or its configuration, is not subjected to comparable transient pulses in the vehicle. It is part of the vehicle manufacturers responsibility to define the transient pulse tests needed f
33、or specific components. A test plan shall be written to define the following: the test methods to be used; the transient pulses tests to be applied; the transient pulses levels; the number of transient pulses to be applied; the DUT operating modes; the wiring harness (test versus production); the le
34、ads to be included in the capacitive coupling clamp, if used; the leads to be tested using the direct coupling capacitor method, if used; the capacitance values to be used, if the direct coupling capacitor method is used for specific communication lines; the leads to be included in the inductive cou
35、pling clamp, if used; and the type of inductive coupling clamp, if the inductive coupling method is used. Suggested transient pulse test severity levels for the evaluation of immunity of DUTs can be chosen from Table B.1 and Table B.2. The transient pulse test severity levels should be mutually agre
36、ed upon between the vehicle manufacturer and the supplier prior to the test. The applicability of the three different test methods is indicated in Table 1. It is sufficient to select one test method for slow transient pulses and one test method for fast transient pulses. Table 1 Test method applicab
37、ility Transient pulses type CCC method DCC method ICC method Slow transient pulses 2a (5.3.2) Not applicable Applicable Applicable Fast transient pulses 3a and 3b (5.3.3) Applicable Applicable Not applicable2 ISO 2016 All rights reservedBS ISO 7637-3:2016ISO 7637-3:2016(E) 4.2 Standard test conditio
38、ns Standard test conditions shall be according to ISO 7637-1 for the following: test temperature; supply voltage. Unless otherwise defined in this part of ISO 7637, the tolerance on test severity levels is %. 4.3 Ground plane The ground plane shall be made of 0,5 mm thick (minimum) copper, brass or
39、galvanized steel. Unless otherwise specified in the test plan, the minimum width of the ground plane shall be 1 000 mm, or underneath the entire setup width (excluding power supply and transient pulse generator) plus 200 mm, whichever is larger. Unless otherwise specified in the test plan, the minim
40、um length of the ground plane shall be 2 000 mm, or underneath the entire setup length (excluding power supply and transient pulse generator) plus 200 mm, whichever is larger. 4.4 General test setup conditions The DUT is arranged and connected according to its requirements. The DUT should be connect
41、ed to the original operating devices (loads, sensors, etc.) using the test setup described in 4.5.4, 4.6.4 and 4.7.4, unless otherwise agreed between the vehicle manufacturer and the supplier. If the actual DUT operating signal sources are not available, they may be simulated. The DUT shall be place
42、d on a non-conductive, low relative permittivity material ( r 1,4), at (50 5) mm above the ground plane. If the DUT is locally grounded (maximum length of 200 mm), then the DUTs ground supply line shall be connected to the ground plane as defined in the test plan. Grounding of the DUT case to the gr
43、ound plane shall reflect the vehicle installation and shall be defined in the test plan. All harnesses shall be placed on a non-conductive, low relative permittivity (dielectric-constant) material ( r 1,4), at (50 5) mm above the ground plane. Unless otherwise specified in the test plan, all loads,
44、sensors, etc. grounds (lines, metallic cases) are connected to the ground plane using the shortest possible length. To minimize extraneous capacitive coupling to the DUT, it is advisable that the minimum distance between the DUT and all other conductive structures, such as walls of a shielded enclos
45、ure (with the exception of the ground plane underneath the test setup), should be more than 0,5 m. 4.5 CCC method 4.5.1 General The CCC method is suitable for coupling the fast transient pulses, particularly for DUTs with a moderate or large number of leads to be tested. It will not couple the slow
46、transient pulses. 4.5.2 Gener at or v erification The transient pulse parameters (see Figure 10 and Figure 11) shall be verified prior to the test according to ISO 7637-2. Verification shall be performed with the 50 load condition only. ISO 2016 All rights reserved 3BS ISO 7637-3:2016ISO 7637-3:2016
47、(E) 4.5.3 Transient pulses level adjustment The transient pulse generator shall be connected as shown in Figure 1. The transient pulse level is adjusted with a 50 input oscilloscope connected through a 50 coaxial cable to a 50 attenuator which is directly connected to the output of the CCC (no inter
48、mediate cable connections) as shown in Figure 1. There shall be no lines routed through the coupling clamp during adjustment. Examples of test severity levels are listed in Annex B. NOTE The open circuit voltage of the transient pulses generator is approximately twice the value of the specific test
49、voltage, due to 50 loading of the attenuator and the oscilloscope. Key 1 transient pulses generator 2 50 coaxial cable (1 m) 3 CCC 4 50 attenuator 5 oscilloscope (50 input) Figure 1 Setup for transient pulses level adjustment CCC method 4.5.4 DUT test Ensure that the general test setup conditions defined in 4.4 are applied. The test setup using the CCC is shown in Figure 2. The coupling circuit consists of a CCC through which lin
