GB/T 38775.4-2020 PDF EnglishUS$200.00 · In stock · Download in 9 seconds
GB/T 38775.4-2020: Electric Vehicle Wireless Power Transfer - Part 4: Limits and Test Methods of Electromagnetic Environment 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 38775.4-2020: Electric Vehicle Wireless Power Transfer - Part 4: Limits and Test Methods of Electromagnetic Environment---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/GBT38775.4-2020 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.99 K 81 Electric Vehicle Wireless Power Transfer - Part 4. Limits and Test Methods of Electromagnetic Environment 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... 5 2 Normative References... 5 3 Terms and Definitions... 5 4 Overview... 7 5 Limits... 8 6 Test Methods... 11 7 Evaluation of Test Result... 20 Appendix A (informative) Test Record Form... 22 Bibliography... 26ForewordGB/T 38875 Electric Vehicle Wireless Power Transfer is divided into several parts as follows. ---Part 1.General Requirements; ---Part 2.Communication Protocols between On-board Charger and Wireless Power Transfer Device; ---Part 3.Specific Requirements; ---Part 4.Limits and Test Methods of Electromagnetic Environment. This Part is Part 4 of GB/T 38775. This Part was drafted in accordance with the rules in GB/T 1.1-2009. This Part was proposed by and shall be under the jurisdiction of China Electricity Council. The drafting organizations of this Part. China Electric Power Research Institute; State Grid Jiangsu Electric Power Company Limited; China Electricity Council; ZX NECORPORATION; China Automotive Technology and Research Center Co., Ltd.; Zhejiang VIE Science & Technology Co., Ltd.; Zongcharge Wireless Power Technology Co., Ltd.; XJ Power Co., Ltd.; State Grid Jiangxi Electric Power Co., Ltd. Research Institute; State Grid Hebei Electric Power Research Institute; State Grid Shanghai Electric Power Research Institute; Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd.; NARI Group Corporation; SAIC MOTOR; Zhejiang GEELY Auto Group; BAIC BJEV; Tsinghua University; TIANGONG University; Southeast University. The main drafters of this Part. Li Ni, Wang Yanzhao, Liu Yongdong, Wan Baoquan, Ge Dehui, Zhai Xuefeng, Zhang Jiangong, Wei Bin, Ma Jianwei, Wang Yang, Wang Chengliang, Hu Chao, Wang Chuanqi, Zhong KAI, Wang Wenbin, Liu Xiangli, Chen Feng, Xu Baohua, Xu Chong.1 ScopeThis Part of GB/T 38775 specifies limits and test methods of electromagnetic environment inside and outside electric vehicles during wireless power transfer. 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); primary devices shall adopt the mode of buried installation or above-ground installation.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 2900.60-2002 Electrotechnical Terminology - Electromagnetism GB/T 12113-2003 Methods of Measurement of Touch Current and Protective Conductor Current GB/T 38775.1-2020 Electric Vehicle Wireless Power Transfer - Part 1.General Requirements GB/T 38775.3-2020 Electric Vehicle Wireless Power Transfer - Part 3.Specific Requirements3 Terms and DefinitionsWhat is defined in GB/T 2900.60-2002 and GB/T 38775.1-2020, and the following terms and definitions are applicable to this document. 3.1 Occupational Exposure Occupational exposure refers to all electromagnetic field exposure that individuals are subject to due to the engagement in fixed or designated occupational activities. Under the conditions of receiving appropriate instructions and trainings, workers are already informed, and voluntarily experience the effects of the electromagnetic fields. 3.3 Medical Exposure Medical exposure refers to electromagnetic field exposure to patients undergoing medical diagnosis or approved medical treatment, or volunteers in medical researches. 3.4 Active Implantable Medical Device Active implantable medical device refers to active medical devices implanted in the human body. 3.5 Touch Current Touch current refers to the current flowing through the human body or animal when they touch one of more accessible parts of devices or equipment. 3.6 Basic Restriction Basic restriction refers to a limit determined for human tissue that may cause harmful health effects. It strictly conforms to all the already-known biophysical interaction mechanisms and is usually difficult to measure. 3.7 Reference Level Reference level refers to a physical quantity introduced for the convenience of actual exposure assessment that are convenient for actual measurement.4 Overview4.1 Protection Areas The following four protection areas are defined, see Figure 1. 4.2 Limit Compliance Requirements Comply with the following limit compliance requirements.5 Limits5.1 Electromagnetic Field Limits 5.1.1 Human exposure limits Electromagnetic field limits of human exposure include basic limits and reference levels, which are respectively shown in Table 1 and Table 2.The compliance with the reference levels in Table 2 can ensure the compliance with the basic limits in Table 1. 5.1.2 Exposure limits of active implantable medical devices In this Chapter, the corresponding frequency band of the limit requirements is. 79 kHz ~ 90 kHz. 5.2 Contact Current Limits Contact current limits are shown in Table 4.6 Test Methods6.1 Test Conditions 6.1.1 Temperature, humidity and atmospheric pressure The environmental requirements of the laboratory are as follows. °C 6.1.2 Test point Within a 1.5 m horizontal range around the test point, there shall be no objects that would affect the test. Primary devices shall be placed on non-metallic ground. The environmental background value shall be not higher than 5% of the limit value in Chapter 5. 6.2 Test Instruments 6.2.1 Test instruments of magnetic field A three-axis isotropic low-frequency field strength probe shall be used. In addition, the circular sensor area shall be not more than 100 cm2.The probe shall use peak detection. 6.2.2 Test instruments of contact current 6.2.2.1 Overview Test instrument is constituted of test impedance network and test electrodes. The bandwidth should be more than 100 MHz. 6.2.2.2 Test impedance network The perceptual or reactive current test impedance network shown in Figure 2 shall be used for testing. 6.2.2.3 Test electrodes Unless it is otherwise specified in the test instrument standard, the test electrodes shall be one of the following two modes. 6.4 Test Method of Magnetic Field 6.4.1 Test range Conduct electromagnetic field test for Protection Area 3, Protection Area 4 and off- board power components. 6.4.2 Test point of Protection Area 3 The electromagnetic test shall be conducted in four test areas. the front, the rear, the left and the right of the vehicle. 6.4.3 Test point of Protection Area 4 Before the test, open the door; adjust the seat to the middle position, as it is shown in Figure 5.If the seat cannot be adjusted to this position, then, in accordance with the seat position declared by the manufacturer, adjust the seat.7 Evaluation of Test Result7.1 Electromagnetic Field Test Result Evaluation In terms of four test areas. Protection Area 3a, Protection Area 3b, Protection Area 4 and off-board power components, respectively evaluate the electromagnetic field test result. See the evaluation procedure below. 7.2 Contact Current Test Result Evaluation The evaluation procedure for contact current test result is as follows. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 38775.4-2020 be delivered?Answer: The full copy PDF of English version of GB/T 38775.4-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 38775.4-2020_English with my colleagues?Answer: Yes. 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