SAE J2954_201711

1. SCOPE
2. REFERENCES
3. DEFINITIONS
4. ABBREVIATIONS
5. WPT CLASSIFICATIONS
6. GENERAL SYSTEM REQUIREMENTS AND INTERFACE
7. PHYSICAL DIMENSIONS AND PARAMETERS
8. INTEROPERABILITY
9. ELECTROMAGNETIC COMPATIBILITY-ELECTROMAGNETIC
    EMISSIONS
10. EMF EXPOSURE TO HUMANS and IMPLANTED MEDICAL DEVICES
11. THERMAL CONSIDERATIONS - HEATING OF OBJECTS
12. WPT UL 2750 and SAE J2954, NATIONAL ELECTRIC CODE
13. COMMUNICATION AND ALIGNMENT
14. PEFORMANCE TESTING
15. SAFETY TESTING
16. DURABILITY
17. HEAVY DUTY WIRELESS POWER TRANSFER OVERVIEW
18. NOTES
APPENDIX A (INFORMATIVE) - M-VA-WPT1/Z1 SPECIFICATION
           TEST STAND VA SPECIFICATIONS
APPENDIX B (INFORMATIVE) - EXAMPLE PRODUCT VA
           SPECIFICATIONS
APPENDIX C (NORMATIVE) - TEST STAND ABOVE GROUND
           MOUNT GA SPECIFICATION
APPENDIX D (INFORMATIVE) - AN EXAMPLE OF AN ABOVE
           GROUND PRODUCT GA SPECIFICATION
APPENDIX E (INFORMATIVE) - PROPOSALS FOR WPT3 TEST
           STAND VA AND GA
APPENDIX F - PROPOSALS FOR FLUSH MOUNT GA WPT3
APPENDIX G (INFORMATIVE) - IMPEDANCE PLANE CAPABILITY
APPENDIX H (INFORMATIVE) - MAGNETIC FLUX REQUIREMENTS
APPENDIX I (INFORMATIVE) - ALIGNMENT
APPENDIX J (INFORMATIVE) - PARKING BAY DEFINITION AND
           DECISION
APPENDIX K (INFORMATIVE) - DETERMINING COUPLING
           FACTORS AND OPTIMAL POSITION
APPENDIX L (INFORMATIVE) - QUANTIFYING POWER LOSS
           UNDER VARYING ASSUMPTIONS
APPENDIX M (INFORMATIVE) - EMF LIMITS GRAPHS AND
           SPECIFICATIONS
APPENDIX N (INFORMATIVE) - UL REFERENCE STANDARDS FOR
           GROUND ASSEMBLY TESTING
APPENDIX O (INFORMATIVE) - GUIDELINES FOR ASSESSMENT
           OF EMF COMPLIANCE WITH THE GENERAL
           PUBLIC BASIC RESTRICTION LEVELS
APPENDIX P (INFORMATIVE) - EMI GUIDELINES FROM VARIOUS
           REGIONS
APPENDIX Q (INFORMATIVE) - LIVE OBJECT PROTECTION
APPENDIX R (INFORMATIVE) - ADDITIONAL TESTING
           SPECIFICATIONS AND OPEN ITEMS

Provides an industry-wide specification that defines acceptable criteria for interoperability, electromagnetic compatibility, EMF, minimum performance, safety and testing for wireless charging of light duty electric and plug-in electric vehicles.

The SAE Recommended Practice J2954 establishes an industry-wide specification that defines acceptable criteria for interoperability, electromagnetic compatibility, EMF, minimum performance, safety and testing for wireless charging of light duty electric and plug-in electric vehicles. The current version addresses unidirectional charging, from grid to vehicle, but bidirectional energy transfer may be evaluated for a future standard. The specification defines various charging levels that are based on the levels defined for SAE J1772 conductive AC charge levels 1, 2, and 3 with some variations. A standard for wireless power transfer (WPT) based on these charge levels will enable selection of a charging rate based on vehicle requirements, thus allowing for better vehicle packaging, and ease of customer use. The specification supports home (private) charging and public wireless charging.In the near term, vehicles that are capable to be charged wirelessly under Recommended Practice should also be able to be charged by SAE J1772 plug in chargers.This Recommended Practice is planned to be standardized after the 2018 timeframe after receiving vehicle data. The contents, including frequency, parameters, specifications, procedures and other contents of this Recommended Practice are to be re-evaluated at that time to allow for additional developments and future innovations.SAE Recommended Practice J2954 is intended to be used for stationary applications (charging while vehicle is not in motion). Dynamic applications may be considered in the future based on industry feedback. This document covers above-ground surface mounted GAs. Flush mounted reference designs have been proposed in the taskforce and it is anticipated that these will be specified in the next version of the Recommended Practice planned for publication in 2018.SAE Recommended Practice J2954 is meant to be used for interoperability, performance and emissions testing, where a single standard coil-set has been chosen for the WPT Power Class 1 and 2 to 7.7kW, per Z-Classes (1 through 3) which is circular topology. However, there are two reference options for WPT 3 to 11kW per Z-classes (1 through 3) with two topologies. The next revision of the Recommended Practice in 2018 is slated to have one standard coil set for WPT 3. This SAE J2954 Test Station is meant to provide a baseline where compatibility with the content of the Recommended Practices is to be demonstrated.The future standard, will use this -performance based- J2954 Standard Testing Station to establish a uniform way to demonstrate design for both the electrified vehicle (VA) and WEVSE (GA) components safety, interoperability, performance and EM emissions -through testing-. The goal is to have a common methodology to validate Wireless Power Transfer and Alignment, production designs between different power classes and topologies for both the vehicle and infrastructure.