1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J1113/26_201404 SURFACE VEHICLE RECOMMENDED PRACTICE J1113-26 APR2014 Issued 1995
5、-09 Revised 2014-04 Superseding J1113-26 MAY2006 Electromagnetic Compatibility Measurement Procedure for Vehicle Components - Immunity to AC Power Line Electric Fields RATIONALE Appendix A - Function Performance Status Classifications (FPSC) of this document has been revised to be consistent with th
6、e referenced Appendix in SAE J1113-1. FOREWORD This is a test which is being documented in this SAE Recommended Practice. There is no known comparable SAE or ISO test method. It is expected that this method will be used for field experimentation to verify the techniques and the field intensity level
7、s proposed. The committee would appreciate comments relevant to this document. Vehicles often negotiate areas crossed by high voltage (up to 1 000 000 V) power transmission lines. During operation the vehicle electronics will be exposed to intense AC electric fields. The field intensity from power l
8、ines is expected to be higher for off road vehicles than on road vehicles. This test method is most applicable to off road vehicle use, however road vehicles have also seen disruptive fields in service. Field levels measured during testing have reached as high as 15 000 V/m. Laboratory testing for t
9、hese conditions should always be performed for vehicle electronics for vehicles which routinely encounter off road driving. Such vehicles would include agricultural and timber harvesting equipment as well as earth moving and construction vehicles. 1. SCOPE This SAE Recommended Practice covers the re
10、commended testing techniques for the determination of electric field immunity of an automotive electronic device when the device and its wiring harness is exposed to a power line electric field. This technique uses a parallel plate field generator and a high voltage, low current voltage source to pr
11、oduce the field. 2. REFERENCES For general references, see SAE J1113-1. For AC Power Line magnetic field testing, see SAE J1113-22. SAE INTERNATIONAL J1113-26 Revised APR2014 Page 2 of 6 2.1 Applicable Documents The following publications form a part of this specification to the extent specified her
12、ein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1113-1 Electromagn
13、etic Compatibility Measurement Procedures and Limits for Vehicle Components of Vehicles, Boats (up to 15 m), and Machines (Except Aircraft) (16.6 Hz to 18 GHz) SAE J1113-22 Electromagnetic Compatibility Measurement Procedure for Vehicle Components - Part 22 - Immunity to Radiated Magnetic Fields 3.
14、DEFINITIONS For general definitions, see SAE J1113-1. 4. TEST APPARATUS The test apparatus shall consist of the following: 4.1 VOLTAGE SOURCE Any voltage source capable of supplying approximately 15 000 V of AC (50 or 60 Hz as appropriate) at a current of at least 1 mA can be utilized. 4.2 HIGH VOLT
15、AGE VOLTMETER A high impedance voltmeter capable of measuring at least 15 000 Vrms. NOTE: An example of the construction of a parallel plate field generator is shown in Appendix B. 5. TEST SETUP NOTE: Hazardous voltage and fields exist on and near the parallel plate field generator when the equipmen
16、t is energized. Test personnel should ensure that no one is in contact with the field generator during a test. 5.1 Test setup should be as shown in Figure 1. The device under test is installed central to and midway between the field plates of the parallel plate field generator. The resistors used in
17、 this fixture are glass, high voltage resistors. SAE INTERNATIONAL J1113-26 Revised APR2014 Page 3 of 6 FIGURE 1 - EQUIPMENT SETUP EXAMPLE 5.2 The DUT and wire harness shall be placed in a non-conductive support midway between the plates. The harness shall leave the field area parallel to the field
18、generating plates for at least m beyond the outer edge of the plates. Note that the primary function of the fixture is to fix the positions of the harness and DUT to ensure the most repeatable results and should be constructed with this in mind. This non-conductive fixture shall be constructed of ma
19、terial with a low dielectric constant (e.g., polystyrene or equivalent). When peripheral devices are used for operating or monitoring the device under test, they should be the original vehicle devices, where possible. 5.3 The AC Field shall be generated as required. The plate voltage, Ev, may be mea
20、sured by using a high voltage voltmeter at the voltage generator. Since the plates are spaced 1 m apart, the field between the plates will equal the excitation voltage per meter. NOTE: If field intensities higher than 15 000 V/m are desired, the height of the parallel plate antenna could be reduced
21、in order to generate higher field intensities. The antenna height shall not be reduced to less than 0.5 meters and care should be taken that the DUT height does not exceed 1/3 the antenna height (unless otherwise approved in the test plan). When an antenna with a reduced height is used, the resultan
22、t field intensity in V/m is calculated by: Field Levels (V/m) = Voltage Applied (Vrms) x 1/antenna height (in meters). 6. TEST PROCEDURE Three test configurations are feasible, and are represented by the three orthogonal axes through the DUT. Each of the three axes should be oriented to the primary
23、field of the parallel plate field generator and the module exposed to the AC field in that position for the required dwell time. 6.1 The test fixture may be used in the following manner: Slowly increase the voltage gradient between the plates to the upper immunity limit noting any malfunctions, thei
24、r nature and the field strength levels. The dwell time shall be long enough to detect any malfunction of the DUT. When completed, set the excitation voltage to 0 V and allow the system to bleed off the charge before allowing personnel to come in contact with the fixture or with the DUT. CAUTION: Aft
25、er removing power from the text fixture, monitor the voltage to ensure that the voltage has fallen to a safe level before personnel are allowed to approach. SAE INTERNATIONAL J1113-26 Revised APR2014 Page 4 of 6 7. TEST SEVERITY LEVELS 7.1 A full description and discussion of the Function Performanc
26、e Status Classification including Test Severity Levels are given in SAE J1113-1 Appendix A. Please review it prior to using the suggested Test Severity Levels presented in Appendix A of this part. 8. NOTES AND SPECIAL CONSIDERATIONS 8.1 For most designs of a parallel plate field generator, the field
27、 strength is uniform to within approximately 150 mm of the edge of either plate. Closer to the edge, the field rolls off. For this reason, it is recommended that the DUT be placed as close to the center of the space between the plates as can be arranged. 8.2 If a conductive DUT exceeds more than 1/3
28、 of the spacing between the plates, the test field will be perturbed resulting in a stronger field than indicated by the measured voltage. 8.3 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial ch
29、anges, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only.
30、 PREPARED BY THE SAE EMC STANDARDS COMMITTEE SAE INTERNATIONAL J1113-26 Revised APR2014 Page 5 of 6 APPENDIX A (NORMATIVE) FUNCTION PERFORMANCE STATUS CLASSIFICATION (FPSC) A.1 FUNCTION PERFORMANCE STATUS CLASSIFICATION .IS DESCRIBED IN TABLE A.1 (SEE SAE J1113-1 FOR ADDITIONAL INFORMATION) TABLE A.
31、1 - FUNCTION PERFORMANCE STATUS CLASSIFICATIONS Category (i) 1 2 3 Status IV (Status I, II, III allowed) Status IV (Status I, II, III allowed) Status IV (Status I, II, III allowed) Status III (Status I, II allowed) Status III (Status I, II allowed) Status III (Status I, II allowed) Status II (Status
32、 I allowed) Status II (Status I allowed) Status II (Status I allowed) Status I Status I Status I A.2 AN EXAMPLE OF TEST SEVERITY LEVELS IS SHOWN IN TABLE A.2 TABLE A.2 - EXAMPLE OF TEST SEVERITY LEVELS Status Category 1 Category 2 Category 3 IV L41 = 15,000 V/m Not Allowed Not Allowed III L31 = 10,0
33、00 V/m L32 = 15,000 V/m Not Allowed II L21 = 5,000 V/m L22 = 10,000 V/m L23 = 15,000 V/m I L11 5,000 V/m L12 = 5,000 V/m L13 = 10,000 V/m Severity Levels L4i L3iL2iL1iSAE INTERNATIONAL J1113-26 Revised APR2014 Page 6 of 6 APPENDIX B (INFORMATIVE) FIELD GENERATOR CONSTRUCTION B.1 An example of the co
34、nstruction of a parallel plate field generator is shown in in Figure B1. The plates in the present devices have been constructed of aluminum sheet. All edges and corners should be rounded to reduce the possibility of developing corona discharges. FIGURE B1 - PARALLEL PLATE FIELD GENERATOR EXAMPLE B.
35、2 The supporting structure elements should be constructed of material which provides enough electrical isolation while maintaining a low current (less than 1 ma) leakage between the plates. PVC and fiberglass tubing are both suitable. B.3 The function of the field distribution wires is to ensure uni
36、formity of the field throughout the test volume. The field distribution wires should be equally spaced between the parallel plates and the corners of the squares rounded. The 5 mw resistors should be high voltage glass types to prevent arcing, leakage and corona. Make sure that the ends of the wires are twisted back onto the main wire and covered with solder with smooth edges to prevent corona discharge from sharp points.
