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GB/T 38775.3-2020: Electric Vehicle Wireless Power Transfer - Part 3: Specific Requirements Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 38775.3-2020: Electric Vehicle Wireless Power Transfer - Part 3: Specific Requirements---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/GBT38775.3-2020NATIONAL 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 ContentsForeword... 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... 281 ScopeThis 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 ReferencesThe 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 Phase3 Terms and DefinitionsWhat is defined in GB/T 38775.1-2020, and the following terms and definitions are applicable to this document. 3.1 Stationary Magnetic Field Wireless Power Transfer; MF-WPT Stationary magnetic field wireless power transfer refers to a power transfer mode which uses magnetic field as a medium to transfer wireless power from a power source to a power load through magnetic coupling; the physical position of the power source and the power load is in the stationary state. 3.2 System Frequency System frequency refers to the frequency range of wireless power transfer system for power transmission. 3.3 Nominal Frequency Nominal frequency refers to the operating frequency of system design. In terms of systems with an adjustable frequency, when the primary device and the secondary device are aligned, and all components are stably operating with the designed parameters, the system will operate at the nominal frequency. 3.4 Secondary Device Ground Clearance Secondary device ground clearance refers to the minimum vertical distance between the lower surface of the secondary device and the ground. 3.5 Automatic Charging Mode During the charging process, the wireless power transfer system, in accordance with the data provided by the electric vehicle, dynamically adjusts the charging parameters and executes corresponding operations to complete the charging process. 3.6 Wireless Charging Control and Management System; WCCMS Wireless charging control and management system is responsible for charging coordination control, operation and maintenance monitoring management, business operation management and system management functions of one of multiple electric vehicle wireless power transfer systems.4 Classification4.1 By Magnetic Pole In accordance with magnetic pole, the classification of MF-WPT is shown in Figure 1. 4.2 By Resonance Compensation Topology The resonance circuit of MF-WPT system is shown in Figure 2.The primary device and the secondary device may adopt these resonance topologies. 4.3 By Input Power Level The classification by input power level shall comply with the stipulations of 6.2 in GB/T 38775.1-2020. 4.4 By Service Environment The classification by service environment shall comply with the stipulations of 6.3 in GB/T 38775.1-2020. 4.5 By Installation Mode The classification by installation mode shall comply with the stipulations of 5.4.1 in GB/T 38775.1-2020.5 General Requirements5.1 System Efficiency At the rated operating point, system efficiency shall be not lower than 85%. When the system is output at the rated power, under the condition of all allowable deviations in the vertical and the horizontal directions, system efficiency shall be not lower than 80%. 5.2 System Frequency System frequency of MF-WPT system shall satisfy the requirements in Table 1. 5.3 Mechanical Air Gap Mechanical air gap of primary and secondary devices of MF-WPT system shall satisfy the requirements in Table 2. 5.4 Ground Clearance Ground clearance of secondary devices of MF-WPT system shall satisfy the requirements in Table 3. 5.5 Offset Range Within the offset range shown in Table 4, primary and secondary devices of MF-WPT system shall satisfy the requirements of 7.6 in GB/T 38775.1-2020. 5.6 System Structure MF-WPT system structure shall take Appendix A of GB/T 38775.1-2020 as a reference. 5.7 Primary Devices 5.7.1 Installation mode Installation mode of primary devices is shown in the stipulations of 5.4 in GB/T 38775.1-2020. 5.7.2 Installation location Installation location of coil of primary devices shall take A.1 of Appendix A as a reference. 5.8 System Functions 5.8.1 Charging mode MF-WPT system shall be equipped with the mode of automatic charging. 5.8.2 Standby awaken When MF-WPT system is in standby state, it shall be able to be awaken by the off- board devices. 5.8.3 Parameter detection In accordance with information exchanged during the initialization stage, detect interoperability parameters between the primary devices and the secondary devices, 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. 5.8.9 Abnormality protection The off-board devices and on-board devices of MF-WPT system shall all be equipped with a function of abnormality protection. See the specific requirements below.6 Communication Requirements6.1 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. 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.7 Technical Requirements7.1 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. 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. 7.4 Electromagnetic Environment Limits Electromagnetic environment limits of MF-WPT system shall satisfy the requirements of Chapter 5 in GB/T 38775.4-2020. 7.5 Protection against Electric Shock The requirements for protection against electric shock of MF-WPT system shall comply with the stipulations of 10.2 in GB/T 38775.1-2020. 7.6 Dielectric Strength Characteristics The requirements for dielectric strength characteristics of MF-WPT system shall comply with the stipulations of 10.2.3 and 10.2.4 in GB/T 38775.1-2020. 7.7 Overcurrent Protection and Short-circuit Protection The overcurrent protection and short-circuit protection function of MF-WPT system shall satisfy the requirements of 10.3 in GB/T 38775.1-2020. 7.8 Temperature Rise and Overheating Prevention Temperature rise and overheating protection function of MF-WPT system shall satisfy the requirements of 10.4 in GB/T 38775.1-2020.8 Test Methods8.1 Test Conditions and Environment 8.1.1 Test system A schematic diagram of wireless charging test system is shown in Figure 3. Figure 3 -- Schematic Diagram of Wireless Charging Test System 8.1.2 Test platform Test platform can accommodate. 8.1.3 Ambient conditions The test shall be conducted under the following ambient conditions. 8.1.4 Power source conditions During the test, the power source conditions are as follows. 8.1.5 Test instrument requirements Unless it is otherwise stipulated, the precision of the instruments used in the test shall satisfy the following requirements. 8.1.6 Test load The load described in the test shall select resistance load or electronic load. 8.2 System Efficiency 8.2.1 System efficiency test of MF-WPT system without offset Under the rated input conditions, the system efficiency test of MF-WPT system under the conditions of no offset under different power sections and different mechanical air gaps is shown in Table B.1 in Appendix B. 8.2.2 System efficiency test of MF-WPT system with offset The system efficiency test points are shown in Figure 4. The requirements and recording of system efficiency test points with offset are shown in Table B.2. 8.2.3 System efficiency test of MF-WPT system with Deflection Test the system efficiency under the condition that the secondary coil deflects around the Z axis. During the test, the deflection angle is 10°; the selection of test points is shown in 8.2.2. 8.3 Power Factor Under the rated input conditions, the power factor test of MF-WPT system under the conditions of no offset under different power sections and different mechanical air gaps is shown in Table B.4. 8.4 Harmonic Current Under the rated input and rated output conditions, the harmonic current limit test of MF-WPT system under the conditions of nominal air gap and no offset is shown in Table B.6. 8.5 Electromagnetic Environment Limits The test method of electromagnetic environment limits of MF-WPT system shall comply with the requirements of Chapter 6 in GB/T 38775.4-2020. 8.6 Protection against Electric Shock 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 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. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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