GB/T 18387-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 18387-2017 | English | 70 |
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Limits and test method of magnetic and electric field strength from electric vehicles
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| GB/T 18387-2008 | English | 70 |
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Limits and test method of magnetic and electric field strength from electric vehicles, broadband, 9kHz to 30MHz
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| GB/T 18387-2001 | English | 439 |
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Limits and methods of measurement of electromagnetic field radiation intensity broadband electric vehicles 9kHz ~ 30MHz
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GB/T 18387-2017: Limits and test method of magnetic and electric field strength from electric vehicles
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18387-2017
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
T 09
Replacing GB/T 18387-2008
Limits and test method of magnetic and
electric field strength from electric vehicles
Issued on: MAY 12, 2017
Implemented on: DECEMBER 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Limit requirements... 6
5 Test site... 7
6 Test instruments... 7
7 Test arrangement... 8
8 Test procedures... 10
Annex A (Informative) Limit derivation... 12
Annex B (Informative) Preliminary observation... 15
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 18387-2008 Limits and test method of magnetic
and electric field strength from electric vehicles, broadband, 9kHz to 30MHz.
Compared with GB/T 18387-2008, the major technical changes in this Standard
are as follows.
— MODIFY the standard name;
— MODIFY the test frequency band (SEE Chapter 1);
— MODIFY the electromagnetic field emission intensity limit (SEE Chapter
4);
— DELETE the limit requirements for conducted emission and relevant test
contents (SEE Subclause 4.2 in 2008 edition);
— MODIFY the layout height of the loop antenna (SEE Subclause 7.3);
— DELETE the magnetic field measurement in a vertical direction (SEE
Subclause 5.4.3 in 2008 edition);
— MODIFY the operating mode of the test vehicles (SEE Subclause 8.1).
This Standard was proposed by the Ministry of Industry and Information
Technology of the People’s Republic of China.
This Standard shall be under the jurisdiction of the National Technical
Committee for Standardization of Motor Vehicles (SAC/TC 114).
Drafting organizations of this Standard. China Automotive Technology &
Research Center, Beijing New Energy Automobile Co., Ltd, Anhui Ankai
Automobile Co., Ltd, SAIC Motor Corporation Limited, Zhengzhou Yutong Bus
Co., Ltd, BYD Auto Industry Co., Ltd, China Automotive Engineering Research
Institute Co., Ltd, SAIC-GM-Wuling Automobile Co., Ltd, Great Wall Motor
Company Limited, Xiangyang Da’an Automobile Test Center, Dongfeng Motor
Corporation, Pan Asia Technical Automotive Center Co., Ltd, Shanghai Motor
Vehicle Inspection Center, Beiqi Foton Motor Co., Ltd, BMW Brilliance
Automotive Ltd, Zhejiang Geely Automobile Research Institute Co., Ltd, and
SAIC Volkswagen Automotive Co., Ltd.
Main drafters of this Standard. Ding Yifu, Zhou Rong, Liu Haiming, Li Bo, Ge
Fei, Huang Xuemei, Cheng Jinhua, Liu Xin, He Yuntang, Li Zhenshan, Zhou
Yukui, Deng Fuqi, Chu Yangang, Wang Jun, Xie Huan, Wang Ye, Gao Xinjie,
Yin Yue, Ma Conghai, Liu Xinliang, Yang Shuo, Xiang Yunxiu and Ai Longcai.
The previous released editions of the standards substituted by this Standard
are as follows.
— GB/T 18387-2001, GB/T 18387-2008.
Limits and test method of magnetic and
electric field strength from electric vehicles
1 Scope
This Standard specifies the limits of the electric field and magnetic field
emission intensity and the test methods for the vehicles. The test frequency
shall be within the range of 150kHz to 30MHz.
This Standard is applicable to the blade electric vehicles, hybrid electric
vehicles, fuel cell electric vehicles and other types of electric vehicles.
2 Normative references
The following documents are essential to the application of this document. For
dated references, only the editions with the dates indicated are applicable to
this document. For undated references, only the latest editions (including all the
amendments) are applicable to this document.
GB/T 6113.101 Specification for radio disturbance and immunity measuring
apparatus and methods of measurement - Part 1-1.Radio disturbance and
immunity measuring apparatus - Measuring equipment
GB/T 6113.104 Specification for radio disturbance and immunity measuring
apparatus and methods - Part 1-4.Radio disturbance and immunity
measuring apparatus - Radiated disturbance measuring antenna and test
site
GB 14023-2011 Vehicles, boats and internal combustion engine - Radio
disturbance characteristics - Limits and methods of measurement for the
protection of off-board receivers
GB/T 29259 Road vehicle - Electromagnetic compatibility terminology
3 Terms and definitions
The terms and definitions defined in GB/T 29259 are applicable to this
document.
4 Limit requirements
The emission limits of electric field intensity are shown in Table 1 and Figure 1.
5 Test site
The test site is an absorber lined shielded enclosure (ALSE). An outdoor test
site (OTS) can be selected for testing. The site shall comply with the
6 Test instruments
6.1 General
The measuring instrument shall meet the requirements of GB/T 6113.101.The
background noise of the measuring instrument shall be at least 6dB lower than
the limit.
Note. When using a passive antenna, a preamplifier can be added between the antenna and the scanning
receiver for the realization of 6dB background noise. PAY attention to the overload characteristics of the
amplifier and receiver. It is recommended to use an antenna with an active matching unit. No additional
preamplifier is required.
6.2 Parameters of the scanning receiver
The parameter settings of the scanning receiver’s bandwidth, step size and
dwell time are shown in Table 3.
6.3 Antenna
The antenna shall meet the requirements of GB/T 6113.104.The following
antennas apply to this Standard.
a) electric field antenna. 1m long monopole antenna, installed perpendicular
to the ground, and equipped with an antenna matching unit;
b) magnetic field antenna. electrostatically-shielded loop antenna with a
diameter of 60cm.
Note. Monopolar antenna and loop antenna products with known antenna correction factors can be used.
The attenuation / gain between the antenna and the receiver shall be properly corrected.
7 Test arrangement
7.1 Electric field antenna grounding
The matching unit shall be mounted on the ground plane to minimize the ground
inductance. If an outdoor test site (OTS) is used, the grounding grid
recommended by the manufacturer shall be placed on the ground and
connected to a ground rod with a length of at least 2m to ensure that the
inductance is minimal. It is not permissible to use a floating grounding grid that
is grounded at the receiver end via an antenna cable.
7.2 Position of the electric field antenna
The monopole antenna is placed on the ground, 3m ± 0.03m from the nearest
part of the vehicle. As shown in Figure 3, the four positions of the antenna are
as follows.
— Front and rear positions of the vehicle, and located on the center line of
the vehicle;
— Left and right sides of the vehicle, and located on the center line between
the front and rear axles.
7.3 Position of the magnetic field antenna
The center of the loop antenna is 1.3m ± 0.05m from the ground and 3m ±
0.03m from the nearest part of the vehicle. The support of the loop antenna
shall be able to realize the two polarization directions of the loop antenna. The
direction of polarization (also the direction of the maximum response of the loop
antenna) is expressed in the direction of the magnetic field vector perpendicular
to the plane of the loop. As shown in Figure 4, the direction of the loop antenna
is.
8 Test procedures
8.1 Default operating conditions
The operating modes of the vehicle are shown in Table 4.In all operating modes,
the electric drive system shall be in drive mode. Deviations from the operating
modes shall be documented in details in the test report.
8.2 Test steps
Preliminary observations can be made before the test. REFER to Annex B for
specific methods. The test steps are as follows.
a) SET the road load according to the full load conditions of the vehicle. RUN
the vehicle at a stable speed of 40km/h.
b) ARRANGE the monopole antenna according to the requirements of
Subclause 7.2.RECORD the electric field measurement data.
c) ARRANGE the loop antenna according to the requirements of Subclause
7.3.RECORD the measurement data in two directions of the magnetic field.
d) DETERMINE the maximum emission direction based on the maximum
result of measurement relative to the limits in Steps b) and c). If the highest
level of the two different sides of the vehicle is substantially equal, then one
of the sides may be selected as the maximum radiation direction.
e) RUN the vehicle in accordance with the operating mode in Table 4.
f) SCAN the peaks of the electric field and magnetic field on the maximum
emission side of the vehicle.
8.3 Test report
The test report shall record the instrument settings, the maximum emission side
of the vehicle, the operating modes of the vehicle, etc.
Annex A
(Informative)
Limit derivation
A.1 Information on the electric field limits
The recommended limit for the electric field intensity of the broadband peak
pulse is initially defined as the limit of the 10m measurement distance. The
bandwidth is normalized to 1kHz at 20MHz. The limit is 12dB (μV/m) and is
inversely proportional to the frequency. SEE Formula (A.1) for fundamental
research.
Annex B
(Informative)
Preliminary observation
Before the emission measurement on the dynamometer, the electric vehicle can
be operated on the road surface, and the relationship between the
electromagnetic radiation and the operating mode of the electric vehicle is
preliminarily subjectively observed by the listening of the weak medium-wave
signal channel (long-wave signals can be used if the vehicle can listen for long-
wave signals). Preliminary observations can be performed by using the
vehicle’s built-in antenna and radio, or a temporary reception system consisting
of a monopole antenna and a radio receiver mounted on the roof. When using
the temporary receiving system, PAY attention to the grounding of antenna and
car body. It is advisable to operate the radio receiver by using a separate battery.
Preliminary observations shall be made during the day, with at least three weak
signal channels selected throughout the band.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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