1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication BS ISO 7637-2:2011 Road vehicles Electrical disturbances from conduction and coupling Part 2: Electrical transient conduction along supply lines onlyBS ISO 7637-2:2011 BRITISH
2、 STANDARD National foreword This British Standard is the UK implementation of ISO 7637-2:2011. The UK participation in its preparation was entrusted to Technical Committee AUE/16, Electrical and electronic equipment. A list of organizations represented on this committee can be obtained on request to
3、 its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 61196 4 ICS 33.100.10; 43.040.10; 43.080.01 Compliance with a British Standard cannot confer immunity from legal obligat
4、ions. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2011. Amendments issued since publication Date Text affectedBS ISO 7637-2:2011Reference number ISO 7637-2:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 7637-2 Third edition 2011-03-0
5、1 Road vehicles Electrical disturbances from conduction and coupling Part 2: Electrical transient conduction along supply lines only Vhicules routiers Perturbations lectriques par conduction et par couplage Partie 2: Perturbations lectriques transitoires par conduction uniquement le long des lignes
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9、ntral Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permissi
10、on in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights reserved
11、BS ISO 7637-2:2011 ISO 7637-2:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Test procedure.1 4.1 General .1 4.2 Test temperature and supply voltages2 4.3 Voltage transient emissions test .2 4.4 Transient immunity test6
12、 5 Test instrument description and specifications 9 5.1 Artificial network .9 5.2 Shunt resistor R s 10 5.3 Switch S10 5.4 Power supply .11 5.5 Measurement instrumentation .12 5.6 Test pulse generator for immunity testing .12 Annex A (informative) Example of test pulse severity levels associated wit
13、h function performance status classification 17 Annex B (normative) Transient emissions evaluation Voltage waveform .19 Annex C (normative) Test pulse generator verification procedure .23 Annex D (informative) Determination of pulse generator energy capability 26 Annex E (informative) Origin of tran
14、sients in the electric system of road vehicles 30 Annex F (informative) Alternative transient testing technique using electromechanically switched inductive loads 33 Bibliography43 BS ISO 7637-2:2011 ISO 7637-2:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for S
15、tandardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the ri
16、ght to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take Part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Internationa
17、l Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as
18、an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO
19、 7637-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. This third edition cancels and replaces the second edition (ISO 7637-2:2004), which has been technically revised. It also incorporates the Amendment ISO 7637-2:2004/Amd.1:200
20、8. It does not specify test pulses 4, 5a, and 5b, which are now specified in ISO 16750-2 and ISO 21848. 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: Electri
21、cal transient conduction along supply lines only Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines BS ISO 7637-2:2011 INTERNATIONAL STANDARD ISO 7637-2:2011(E) ISO 2011 All rights reserved 1Road vehicles Electrical disturbances from cond
22、uction and coupling Part 2: Electrical transient conduction along supply lines only 1 Scope This part of ISO 7637 specifies test methods and procedures to ensure the compatibility to conducted electrical transients of equipment installed on passenger cars and commercial vehicles fitted with 12 V or
23、24 V electrical systems. It describes bench tests for both the injection and measurement of transients. It is applicable to all types of road vehicles independent of the propulsion system (e.g. spark ignition or diesel engine, electric motor). Function performance status classification for immunity
24、to transients is given in Annex A. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)
25、applies. ISO 7637-1, Road vehicles Electrical disturbances from conduction and coupling Part 1: Definitions and general considerations 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 7637-1 apply. 4 Test procedure 4.1 General Methods for measuring th
26、e transient emission on supply lines and test methods for the immunity of devices against such transients are given. These tests, called “bench tests”, are performed in the laboratory. The bench test methods, some of which require the use of the artificial network, will provide comparable results be
27、tween laboratories. A bench test method for the evaluation of the immunity of a device against supply line transients may be performed by means of a test pulse generator. This may not cover all types of transients which can occur in a vehicle; therefore, the test pulses described in 5.6 are characte
28、ristic of typical pulses. In special cases, it may be necessary to apply additional test pulses. However, some test pulses may be omitted if a device, depending on its function or its connection, is not influenced by comparable transients in the vehicle. It is part of the vehicle manufacturers respo
29、nsibility to define the test pulses required for a specific device. BS ISO 7637-2:2011 ISO 7637-2:2011(E) 2 ISO 2011 All rights reserved4.2 Test temperature and supply voltages The ambient temperature during the test shall be (23 5) C. The supply voltages shall be as shown in Table 1 unless other va
30、lues are agreed upon by the users of this part of ISO 7637, in which case such values shall be documented in the test reports. U Ais the supply voltage defined in Table 1, which shall be measured at the output of the pulse generator. Table 1 Supply voltages Supply voltage Nominal 12 V system V Nomin
31、al 24 V system V U A13,5 0,5 27 1 4.3 Voltage transient emissions test 4.3.1 General This clause defines a test procedure to evaluate automotive electrical and electronic components for conducted emissions of transients along battery fed or switched supply lines of a device under test (DUT). A DUT w
32、hich is considered a potential source of conducted disturbances should be tested according to the procedure described in this clause. Care shall be taken to ensure that the surrounding electromagnetic environment does not interfere with the measurement set-up. The test method applies to DUT with or
33、without internal mechanical or electronic switch driving inductive loads. Voltage transients from the disturbance source, the DUT, are measured using the artificial network to standardize the impedance loading on the DUT (see 5.1). All wiring connections between the artificial network, switch, and t
34、he DUT shall be spaced (50 5) mm above the metal ground plane. The cable sizes shall be chosen in accordance with the real situation in the vehicle, i.e. the wiring shall be capable of handling the operating current of the DUT, and as agreed between vehicle manufacturer and supplier. Grounding of th
35、e DUT case to the ground plane shall reflect the vehicle installation and shall be defined in a test plan. If no requirements are specified in the test plan, then the DUT shall be placed on a non-conductive material (50 5) mm above the ground plane. The supply voltage U Aand the disturbance voltage
36、shall be measured (see 4.3.2 and 4.3.3 for measurement guidance) using a voltage probe (see 5.5) and an oscilloscope or waveform acquisition equipment. For values, see Annex B. DUT operating conditions of particular interest in the measurements are the switch-off and the exercising of the various op
37、erating modes of the DUT. Exact operating conditions of the DUT shall be specified in the test plan. NOTE Measurements at turn-on can be of interest in some instances. BS ISO 7637-2:2011 ISO 7637-2:2011(E) ISO 2011 All rights reserved 3The sampling rate and trigger level shall be selected to capture
38、 a waveform displaying the complete duration of the transient, and with sufficient resolution to display the highest positive and negative portions of the transient. Utilising the proper sampling rate and trigger level, the voltage amplitude shall be recorded by actuating the DUT according to the te
39、st plan. Other transient parameters, such as rise time, fall time, transient duration, etc. may also be recorded. Unless otherwise specified, ten waveform acquisitions are necessary. It is necessary to report only the waveforms with the highest positive and negative amplitude (with their associated
40、parameters). The measured transient shall be evaluated in accordance with Annex B. All pertinent information and test results shall be reported. If required per test plan, include transient evaluation results with respect to the performance objective as specified in the test plan. The test applies t
41、o an inductive load (such as power window, power seat, relay, electric mirror, etc.) with a large inductance or a high load current, which connects to the vehicle power supply, or a DUT which switches such an inductive load. If an inductive load has a small inductance or a low load current and is dr
42、iven by an internal regulated voltage (e.g. 5 V), which is isolated from the vehicle power supply, the test is not applicable unless specified in a test plan. 4.3.2 Test set-up for slow pulses The test set-up is described in Figure 1 a). The disturbance source is connected via the artificial network
43、 to the shunt resistor R s(see 5.2), the switch S (see 5.3) and the power supply (see 5.4). The switch S represents the main switch (e.g. ignition switch, relay, etc.) which supplies the DUT and could be located at several metres from the DUT. In the case of a DUT having an internal mechanic and/or
44、electronic switch driving inductive load, the test set- up described in Figure 1 a) is applicable with the DUT internal switch closed (DUT inductive loads powered when opening switch S). Depending on the DUT internal switch type (relay, electronic switches, IGBT, etc.) it may not be possible to ensu
45、re a controlled closure of the internal switch. The detail state of the internal switch(es) shall be recorded in the test report. Transients generated by the supply disconnection of the DUT are measured at the moment of opening the switch S (the switch S is operated in order to generate transient di
46、sturbance). BS ISO 7637-2:2011 ISO 7637-2:2011(E) 4 ISO 2011 All rights reservedDimensions in millimetres Drawing not to scale a) Transient emission test set-up to measure slow pulses (ms-range or slower) Figure 1 Transient emission test set-up to measure pulses (continued) 4.3.3 Test set-up for fas
47、t pulses The test set-up is described in Figure 1 b) for DUT without internal switch. The disturbance source is connected via the artificial network to the shunt resistor R s(see 5.2), the switch S (see 5.3) and the power supply (see 5.4). Transients generated by the supply disconnection of the DUT
48、are measured at the moment of opening the switch S (the switch S is operated in order to generate transient disturbance). BS ISO 7637-2:2011 ISO 7637-2:2011(E) ISO 2011 All rights reserved 5Dimensions in millimetres Drawing not to scale b) Transient emission test set-up to measure fast pulses (ns to
49、 s range) for DUT without internal switch Figure 1 Transient emission test set-up to measure pulses (continued) The test set-up is described in Figure 1 c) for DUT with internal switch. The disturbance source is connected via the artificial network to the shunt resistor R s(see 5.2) and the power supply (see 5.4). In this case the internal switch shall be operated in order to generate transient disturbance (there is no need for the switch S). Transients generated by the supply disconnection of the DU
