ISO_7637-2-2011.pdfROAD VEHICLES -- ELECTRICAL DIS

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详细说明：ROAD VEHICLES -- ELECTRICAL DISTURBANCES FROM CONDUCTION AND COUPLING -- PART 2: ELECTRICAL TRANSIENT CONDUCTION ALONG SUPPLY LINES ONLYso7637-2:2011(E PDF disclaimer This pdf file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISo Central Secretariat accepts no liability in this area Adobe is a trademark of Adobe Systems Incorporated Details of the software products used to create this Pdf fife can be found in the general Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below ber bodies. In parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by iso memb △ COPYRIGHT PROTECTED DOCUMENT |sO2011 All rIghts reserved. Unless otherwise specifled. no part of this publication may be reproduced or utillzed In any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISo at the address below or ISO's member body in the country of the requester. ISo copyright office Case postale 56. CH-1211 Geneva 20 Te.+41227490111 Fax+41227490947 E-mail copyrightiso. org Webwww.iso.org Published in Switzerland so7637-2:2011(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 through 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 collaborates closely with the International Electrotechnical Commission(IEC)on all matters of electrotechnical standardization International Standards are drafted in accordance with the rules given in the isonEc 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 an nternational 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 7637-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equjpment 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: 2008. 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: Electrical transient conduction along supply lines only Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines INTERNATIONAL STANDARD lso7637-2:2011(E Road vehicles- Electrical disturbances from conduction and coupling Part 2 Electrical transient conduction along supply lines only 1 S cope 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 24V 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 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) 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 the 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 between 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 characteristic of typical pulses n 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 manufacturer's responsibility to define the test pulses required for a specific device so7637-22011(E 4.2 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 values are agreed upon by the users of this part of iso 7637, in which case such values shall be documented in the test reports Ua is the supply voltage defined in Table 1, which shall be measured at the output of the pulse generator Table 1- Supply voltages Nominal 12 V system Nominal 24 V system Supply voltage 135±05 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 Which 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 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 the 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 the 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 UA and the disturbance voltage 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 operating modes of the DUT. Exact operating conditions of the dUT shall be specified in the test Note Measurements at turn-on can be of interest in some instances so76372:2011(E The sampling rate and trigger level shall be selected to capture 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 test 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 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 to 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 driven by an internal regulated voltage (e.g. 5), 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 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 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 ensure 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 disturbance so7637-2:2011(E Dimensions in millimetres Drawing not to scale 3 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 fast 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 Rs(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 are measured at the moment of opening the switch S( the switch S is operated in order to generate transient disturbance) lso7637-2:2011(E Dimensions in millimetres Drawing not to scale 6( 200±50 200±50 b) Transient emission test set-up to measure fast pulses (ns to us 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 Rs (see 5. 2 ) and the power upply( 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 dUT are measured at the moment of opening the internal switch(the switch is operated in order to generate transient disturbance), with the probe connected as close to the dut terminals as possible So7637-2:2011(E) Dimensions in millimetres Drawing not to scale 5 Rs A B 200±50 200±50 c)Transient emission test set-up to measure fast pulses(ns to us range) for dUt with internal switch Key 1 oscilloscope or equivalent 2 voltage probe 3 artificial network 4 DUT(source of transient und plane 6 power supply 7 ground connection; length <100 mm Rs shunt resistance, as specified in 5.2 s switch, as specified in 5. 3 UA supply voltage NOTE For A, B, and P, see Figure 3 a Optionally with internal switch driving inductive load b With internal load and switch Figure 1- Transient emission test set-up to measure pulses 4.4 Transient immunity test 4. 4.1 Location of the dut The dUt shall be placed on a non- conductive low relative permittivity( 1, 4)support with a thickness of (50±5)mm Grounding of the dUT case to the ground plane shall reflect the vehicle installation and shall be defined in a test plan

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