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GB/T 38775.5-2021 English PDF (GBT38775.5-2021)

GB/T 38775.5-2021 English PDF (GBT38775.5-2021)

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GB/T 38775.5-2021: Electric vehicle wireless power transfer -- Part 5: Electromagnetic compatibility requirements and test methods

This document specifies the general requirements, test schemes, immunity requirements and emission requirements of electromagnetic compatibility of the electric vehicle wireless power transfer system. This document is applicable to the wireless power transfer system composed of the ground devices and on-board devices, and the ground devices and electric vehicles. It is also applicable to the ground devices, on-board devices and electric vehicles (or vehicles for short) in the wireless power transfer system. The radiated emission requirements specified in this document do not apply to intentional emissions generated by radio transmitters defined by the ITU, nor do they apply to spurious emissions related to these intentional emissions.
GB/T 38775.5-2021
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.020
CCS T 09
Electric Vehicle Wireless Power Transfer - Part 5:
Electromagnetic Compatibility Requirements and Test
Methods
ISSUED ON: OCTOBER 11, 2021
IMPLEMENTED ON: MAY 1, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
Introduction ... 4
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 8
4 General Requirements ... 9
4.1 Off-board Supply Device and On-board Supply Device ... 9
4.2 Off-board Supply Device and Vehicle ... 9
5 Test Scheme ... 9
5.1 General Rules ... 9
5.2 Test Scheme of Component Device ... 10
5.3 Vehicle-related Test Scheme ... 11
6 Immunity ... 12
6.1 Immunity of Off-board Supply Device ... 12
6.2 Immunity of On-board Supply Device ... 18
6.3 Radiated Immunity of Vehicle ... 24
7 Emission ... 25
7.1 Emission of Off-board Supply Device and On-board Supply Device ... 25 7.2 Emission of Off-board Supply Device ... 30
7.3 Emission of On-board Supply Device ... 32
7.4 Emission of Off-board Supply Device and Vehicle ... 34
7.5 Emission of Vehicle ... 37
Appendix A (normative) Requirements for AC Power Supply ... 39
Bibliography ... 40
Electric Vehicle Wireless Power Transfer - Part 5:
Electromagnetic Compatibility Requirements and Test
Methods
1 Scope
This document specifies the general requirements, test schemes, immunity requirements and emission requirements of electromagnetic compatibility of the electric vehicle wireless power transfer system.
This document is applicable to the wireless power transfer system composed of the ground devices and on-board devices, and the ground devices and electric vehicles. It is also applicable to the ground devices, on-board devices and electric vehicles (or vehicles for short) in the wireless power transfer system.
The radiated emission requirements specified in this document do not apply to intentional emissions generated by radio transmitters defined by the ITU, nor do they apply to spurious emissions related to these intentional emissions.
NOTE: ITU refers to International Telecommunication Union.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document through normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.
GB 4824-2019 Industrial, Scientific and Medical Equipment - Radio-frequency Disturbance Characteristics - Limits and Methods of Measurement
GB 17625.1 Electromagnetic Compatibility - Limits - Limits for Harmonic Current Emissions (equipment input current ??? 16 A)
GB/T 17625.2 (TRANSLATOR NOTE: it should be GB 17625.2) Electromagnetic Compatibility (EMC) - Limits - Limitation of Voltage Changes, Voltage Fluctuations and Flicker in Public Low-voltage Supply Systems, for Equipment with Rated Current ??? 16 A per Phase and not Subject to Conditional Connection
GB/T 17625.7 Electromagnetic Compatibility - Limits - Limitation of Voltage Changes, Voltage Fluctuations and Flicker in Public Low-voltage Supply Systems for Equipment Current Injection (BCI)
GB 34660 Road Vehicles - Requirements and Test Methods of Electromagnetic Compatibility
GB/T 38775.1-2020 Electric Vehicle Wireless Power Transfer - Part 1: General Requirements
IEC 61000-4-3 Electromagnetic Compatibility (EMC) - Part 4-3: Testing and Measurement Techniques - Radiated, Radio-frequency, Electromagnetic Field Immunity Test
CISPR 32:2015 Electromagnetic Compatibility of Multimedia Equipment - Emission Requirements
3 Terms and Definitions
What is defined in GB/T 18655, GB/T 19596, GB/T 29259 and GB/T 38775.1-2020, and the following terms and definitions are applicable to this document. 3.1 Primary Device
Primary device refers to an energy transmitting terminal, a device that is coupled to the secondary device to convert electrical energy into an electromagnetic field and directionally transmit it.
[source: GB/T 38775.1-2020, 3.1]
3.2 Secondary Device
Secondary device refers to an energy receiving terminal, a device that is coupled to the primary device to receive the alternating electromagnetic field and convert it into electrical energy.
[source: GB/T 38775.1-2020, 3.2]
3.3 Off-board Supply Device
Off-board supply device is a collective term for ground-side devices of the electric vehicle wireless power transfer system.
[source: GB/T 38775.1-2020, 3.7]
3.4 On-board Supply Device
On-board supply device is a collective term for on-board devices of the electric vehicle wireless power transfer system.
[source: GB/T 38775.1-2020, 3.8]
3.5 Off-board Power Components
Off-board power components refer to power conversion unit that converts the electrical energy of the power grid into the electrical energy required by the primary device. [source: GB/T 38775.1-2020, 3.5]
4 General Requirements
4.1 Off-board Supply Device and On-board Supply Device
4.1.1 The wireless power transfer system composed of off-board supply device and on-board supply device shall satisfy the emission requirements of 7.1.
4.1.2 The off-board supply device shall satisfy the immunity requirements of 6.1 and the emission requirements of 7.2.
4.1.3 The on-board supply device shall satisfy the immunity requirements of 6.2 and the emission requirements of 7.3.
4.2 Off-board Supply Device and Vehicle
4.2.1 The wireless power transfer system composed of off-board supply device and vehicle shall satisfy the emission requirements of 7.4.
4.2.2 The vehicle shall satisfy the immunity requirements of 6.3 and the emission requirements of 7.5.
5 Test Scheme
5.1 General Rules
5.1.1 Before the test, a test scheme shall be formulated, which includes at least the operating status, excitation function, monitoring function, determination criteria and intentional emissions, etc.
5.1.2 During the test, the test scheme shall be set in accordance with the actual plan of the wireless power transfer system. It may be adjusted in accordance with the manufacturer?€?s regulations, unless otherwise specified.
5.1.3 The test arrangement, ground clearance, size offset, tilt angle, power supply and device parameter configuration, cable connection and other test conditions shall be recorded in the test report in detail.
5.1.4 When performing a radiated emission test, in accordance with the actual continuous charging power; the maximum transmitted charging power
determined by the pre-scanning is considered as the final test charging power. At above 50% of the maximum continuous charging power, perform the
immunity test.
5.2.2.3 If the wireless power transfer system has a large number of similar ports or connector ports, then, a sufficient number of ports shall be selected to simulate the actual operating conditions. In addition, it shall be ensured that the test can cover all different types of terminals (for example, 20% of all ports or at least 4 ports). 5.2.2.4 The AC power supply specified in Appendix A shall be used. The test shall be carried out within the specified working range of the charging device, unless otherwise specified.
5.2.3 Load conditions
The test load shall make the wireless power transfer system work at 20% ~ 80% of the maximum continuous power. All other ports shall be connected to typical loads, for example, electronic load or resistive load.
5.3 Vehicle-related Test Scheme
5.3.1 Charging state
5.3.1.1 When performing the immunity test of 6.3, the charging power of the wireless power transfer system shall be not less than 20% of the maximum continuous charging power of the system.
5.3.1.2 When performing the emission test of 7.4 and 7.5, the charging power of the wireless power transfer system shall be not less than 80% of the maximum continuously charging power of the system.
5.3.1.3 The charging power at the beginning and the end of the test shall be recorded in the test report.
5.3.2 Vehicle state
5.3.2.1 Before the start of the test, the state of charge of the vehicle?€?s rechargeable power storage system shall be at a relatively low level. During the test, the state of charge of the vehicle?€?s rechargeable power storage system shall be between 20% and 80%.
5.3.2.2 During the test, the vehicle shall be stationary, and the engine (if possible) shall be turned off. All devices that are not related to the test function and can be turned off for a long time by the driver or occupant shall be turned off.
5.3.2.3 During the immunity test, the vehicle?€?s parking brake system shall satisfy: a) If the vehicle?€?s parking brake system can be manually or automatically released, then, the parking brake system shall be in a non-parking state. b) If the vehicle?€?s parking brake system cannot be manually or automatically released, then, the parking brake system can be in the parking state.
5.3.2.4 During the immunity test, the vehicle shall be monitored to check the compliance of the vehicle. Except for the necessary test devices, the vehicle shall be no-load.
5.3.2.5 The state of charge of the vehicle?€?s rechargeable power storage system at the beginning and the end of the test shall be recorded in the test report. 5.3.2.6 The state of the vehicle driving system and the state of the parking brake system during the immunity test shall be recorded in the test report.
5.3.3 State of off-board supply device
5.3.3.1 The ground clearance of the wireless power transfer system shall comply with the typical requirements of test vehicle and off-board supply device. Within the range of ground clearance, there shall be no metal or other foreign objects that may affect the normal operation of the system.
5.3.3.2 The off-board power components of the off-board supply device shall use the AC power supply specified in Appendix A.
5.3.3.3 During the radiated emission test of the vehicle, the off-board supply device shall be able to simulate the actual working state and be reasonably installed in the test site. The length of the cable assembly of the primary device and the off-board power components shall comply with the actual product state, and electromagnetic shielding measures may be adopted. The frame or panel used for the arrangement of the off-board supply device shall not affect the test results.
5.3.3.4 The installation status and arrangement of the off-board supply device shall be recorded in the test report.
5.3.3.5 The relative position of the off-board supply device and the vehicle, the gap height, the size and position deviation shall be recorded in the test report. 6 Immunity
6.1 Immunity of Off-board Supply Device
6.1.1 Performance criteria
6.1.1.1 Performance criterion A
range of 150 kHz ~ 30 MHz are to be determined.
7.1.3.6 Enclosure port (30 MHz ~ 1 GHz)
7.1.3.6.1 The measurement shall be conducted in accordance with GB 4824-2019, using the test instrument specified in GB 4824-2019.
7.1.3.6.2 In the frequency band range of 30 MHz ~ 1 GHz, the radiated disturbance limits shall respectively satisfy Table 10 (Type A equipment) and Table 12 (Type B equipment) in GB 4824-2019.
7.1.3.6.3 If the wireless power transfer system can satisfy the radiated disturbance requirements of Type B equipment, then, the warning (or alert) in 7.1.1.1.1 is not required.
7.1.3.7 Test layout of radiated emission
7.1.3.7.1 When testing in the frequency band of 9 kHz ~ 30 MHz, it is recommended to use a loop antenna with a diameter of 60 cm for testing; the antenna shall respectively be in the X-axis, Y-axis and Z-axis polarization directions; 7.1.3.7.2 When testing in the frequency band of 30 MHz ~ 1 GHz, a biconical antenna and a logarithmic antenna shall respectively be used for testing; the antenna shall respectively be in the horizontal polarization and vertical polarization directions. 7.1.3.7.3 After the antenna is tested on one side of the system under test; rotate the turntable by 180??, and the antenna is tested on the other side of the system. 7.1.3.7.4 The test layout (floor-standing equipment) is shown in Figure 8. 12---receiver;
13---receiving antenna;
14---high-quality double-shielded coaxial cable (50 ???);
15---RF absorbing material;
16---artificial power supply network;
17---battery;
a---3 m;
b---0.8 m ~ 1 m;
c---0.2 m ~ 0.4 m;
d---1.3 m.
Figure 9 -- Test Layout of Radiated Disturbance of Off-board Supply Device 7.3 Emission of On-board Supply Device
7.3.1 During the test, the on-board power components in the on-board supply device shall be considered as the test object.
7.3.2 During the radiated disturbance test, if the on-board power components can be separated from other parts of the wireless power transfer system, then, the other parts should be placed outside the test site. When the other parts are located in the test site, they should be placed beyond the lobe range of the receiving antenna. The on-board power components shall satisfy the electric field emission requirements specified in GB/T 18655; the test layout may comply with GB/T 18655.
7.3.3 The on-board power components shall receive a magnetic field emission test. The test method may refer to GB/T 18387; the field strength shall comply with the requirements of the product technical documents. See the test layout in Figure 10. 12---receiver;
13---receiving antenna;
14---high-quality double-shielded coaxial cable (50 ???);
15---RF absorbing material;
16---artificial power supply network;
17---battery;
a---3 m;
d---1.3 m.
Figure 10 -- Test Layout of Radiated Emission of On-board Supply Device 7.4 Emission of Off-board Supply Device and Vehicle
7.4.1 Harmonic current
7.4.1.1 The harmonic current of the off-board supply device and vehicle shall comply with the requirements of 7.1.2.2.
7.4.1.2 The measurement of harmonic current shall be performed at the AC power input port of the off-board power components.
7.4.2 Voltage changes, voltage fluctuations and flicker
7.4.2.1 The voltage changes, voltage fluctuations and flicker of the off-board supply device and vehicle shall comply with the requirements of 7.1.2.3.
7.4.2.2 The measurement of voltage changes, voltage fluctuations and flicker shall be performed at the AC power input port of the off-board power components. 7.4.3 Radio-frequency conducted emission
7.4.3.1 The radio-frequency conducted emission of the off-board supply device and vehicle shall respectively comply with the requirements of 7.1.3.2 and 7.1.3.3. 7.4.3.2 The measurement of radio-frequency conducted emission shall respectively be performed at the AC power input port and the communication line port of the off-board power components.
7.4.4 Radiated emission
7.4.4.1 The magnetic field strength limit of the off-board supply device and vehicle in the frequency band of 9 kHz ~ 30 MHz is to be determined.

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