GB/T 38775.3-2020 English PDF (GBT38775.3-2020)

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GB/T 38775.3-2020: Electric vehicle wireless power transfer -- Part 3: Specific requirements
GB/T 38775.3-2020
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.99
K 81
Electric Vehicle Wireless Power Transfer -
Part 3: Specific Requirements
ISSUED ON: APRIL 28, 2020
IMPLEMENTED ON: NOVEMBER 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
Introduction ... 4 
1 Scope ... 6 
2 Normative References ... 6 
3 Terms and Definitions ... 7 
4 Classification ... 8 
5 General Requirements ... 9 
6 Communication Requirements ... 14 
7 Technical Requirements ... 14 
8 Test Methods ... 15 
Appendix A (informative) Primary and Secondary Devices ... 24 
Appendix B (informative) Test Record ... 28 
Electric Vehicle Wireless Power Transfer -
Part 3: Specific Requirements
1 Scope
This Part of GB/T 38775 specifies the specific requirements for electric vehicle wireless
power transfer system, including the classification, general requirements,
communication requirements, technical requirements and test methods, etc.
This Part is applicable to stationary magnetic coupling wireless power transfer system
of electric vehicles, with the maximum rated voltage of power supply of 1,000 V (AC)
or 1,500 V (DC); the maximum rated output voltage of 1,000 V (AC) or 1,500 V (DC).
2 Normative References
The following documents are indispensable to the application of this document. 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/T 4208-2017 Degrees of Protection Provided by Enclosure (IP code)
GB/T 14048.2 Low-voltage Switchgear and Control-gear - Part 2: Circuit-breakers
GB/T 16895.3-2017 Low-voltage Electrical Installations - Part 5-54: Selection and
Erection of Electrical Equipment - Earthing Arrangements and Protective Conductors
GB/T 16916.1 Residual Current Operated Circuit-breakers without Integral
Overcurrent Protection for Household and Similar Uses (RCCB) - Part 1: General
Rules
GB/T 17625.1 Electromagnetic Compatibility - Limits - Limits for Harmonic Current
Emissions (equipment input current ≤ 16 A per phase)
GB/T 17625.8 Electromagnetic Compatibility - Limits - Limits for Harmonic Currents
Produced by Equipment Connected to Public Low-voltage Systems with Input Current >
16 A and ≤ 75 A per Phase
GB/T 22794 Type F and Type B Residual Current Operated Circuit-breakers with and
without Integral Overcurrent Protection for Household and Similar Uses
GB/T 38775.1-2020 Electric Vehicle Wireless Power Transfer - Part 1: General
Requirements
which shall at least include:
a) Input power level;
b) System frequency;
c) Coil type;
d) Resonance compensation topology;
e) Alignment detection result;
f) Mechanical air gap or ground clearance.
5.8.4 Alignment detection
The on-board devices of MF-WPT system shall have a function of alignment detection,
which can offer feedback about whether the secondary devices are within the offset
range specified by the device manufacturer. If it is detected that the offset range is
exceeded, then, MF-WPT system sends out a warning, and stops charging, or, does
not initiate charging.
5.8.5 Foreign object detection
The off-board devices of MF-WPT system shall have a function of foreign object
detection, which can identify foreign objects that affect the wireless power transmission
above the primary devices. See Table 7 for conventional foreign objects. If a foreign
object is detected, then, MF-WPT system sends out a warning, and stops charging, or,
does not initiate charging.
5.8.6 Protection of living body
The off-board devices of MF-WPT system should have a function of living body
protection, which can judge whether a living body exists in Protection Area 1 and 2 in
GB/T 38775.4-2020. If a living body is detected, then, MF-WPT system sends out a
warning, and stops charging, or, does not initiate charging.
5.8.7 Safety interlocking
The state of being charged and the vehicle’s driving mode shall be in an interlocking
relationship.
5.8.8 Man-machine interaction function
MF-WPT system shall display the following information or state:
a) System operation state indication: standby, charging, abnormality; in the
abnormal state, the cause for the abnormality should be displayed;
6 Communication Requirements
6.1 Command and Control Communication
MF-WPT system shall be equipped with the capability of wireless communication
between the off-board devices and the on-board devices. Through signaling, the
control of the wireless power transmission process and the interaction of relevant and
necessary information can be implemented, so as to ensure the safe and reliable
operation of MF-WPT system.
6.2 High-level Communication
In high-level communication, MF-WPT system shall be equipped with the capability of
wireless communication among the off-board devices, the on-board devices and the
wireless charging control and management system. Through signaling, the wireless
power transmission control, and the interaction of operation data and other relevant
and necessary information can be implemented.
7 Technical Requirements
7.1 System Efficiency
MF-WPT system efficiency shall comply with the stipulations of 5.1. This Clause is
applicable to power level: MF-WPT1, MF-WPT2 and MF-WPT3.
NOTE: the test of other power levels will be determined in the subsequent versions.
7.2 Power Factor
Under the rated input and rated output conditions, MF-WPT system’s input power
factor shall be not lower than 0.98.
7.3 Input Harmonic Current
Merely applicable to the following categories of wireless charging devices:
a) Rated voltage 220 V; connection mode: single-phase three-wire system;
b) Rated voltage 380 V; connection mode: three-phase four-wire system or
three-phase five-wire system;
c) Rated frequency: 50 Hz.
When the input current per phase is less than or equals to 16 A, the power supply
devices connected to the public low-voltage AC distribution system shall comply with
relevant stipulations of GB/T 17625.1. All power supply devices are Type-A devices.
than 0.1 . There shall be not less than 3 measurement points. If the measurement
points are coated with anti-corrosion paint, the anti-corrosion paint shall be scraped off
to expose the non-insulating material, then, conduct the test. The grounding terminal
shall have an obvious sign.
8.6.2 IP level of enclosure
The IP protection level of the enclosure of charging cabinet and cold-source cabinet
shall comply with the requirements of 10.2.5.2 in GB/T 38775.1-2020. The test method
shall comply with the stipulations of Chapter 13 and Chapter 14 in GB/T 4208-2017.
The IP protection level of the various modules of the on-board devices shall comply
with the requirements of 10.2.5.4 in GB/T 38775.1-2020. The test method shall comply
with the stipulations of Chapter 13 and Chapter 14 in GB/T 4208-2017.
8.6.3 IP level of primary devices
The IP protection level of primary devices shall comply with the requirements of
10.2.5.3 in GB/T 38775.1-2020. The test method shall comply with the stipulations of
Chapter 13 and Chapter 14 in GB/T 4208-2017.
8.6.4 IP level of secondary devices
The IP protection level of secondary devices shall comply with the requirements of...