Dynamic Wireless Power Transfer for both Light and Heavy Duty Vehicles (SAE RP J2954/3)
J2954/3
The SAE J2954 standard establishes an industry-wide specification that defines acceptable criteria for Light Duty EVs and SAE RP J2954/2 establishes the same for Heavy Duty. SAE RP SAE J2954.
SAE RP J2954/3 establishes interoperability, electromagnetic compatibility, EMF, minimum performance, safety, and testing for dynamic wireless power transfer (D-WPT) of both light and heavy duty plug-in electric vehicles. The specification defines various charging levels that are based on the levels defined for SAE J1772 conductive AC charge levels as SAE J2954/1 & SAE J2954/2 with some variations. A standard for WPT based on these charge levels enables selection of a charging rate based on vehicle requirements, thus allowing for better vehicle packaging and ease of customer use.
SAE J2954/3 addresses unidirectional charging, from grid to vehicle; bidirectional energy transfer may be evaluated for a future standard. This recommended practice is intended to be used in exclusively for dynamic applications may be considered in the future. In this version, level with grade (flush) and below grade installations are covered.
Rationale: Electrified powertrains, specifically battery electric and plug-in electric (BEV/PHEV) vehicles, are projected to become more prevalent in production internationally due to environmental factors (such as GHG, CO2 emissions), regulations (such as the EU, China, U.S. EPA regulations, and the California ZEV mandates), as well as the increasing price of fossil fuels. The main benefits of electrified powertrains are eliminating or significantly reducing local emissions while increasing the overall well-to-wheels efficiency. In addition, automated are soon to be more co mmonplace to allow more convenient and safer transportation, especially in traffic settings and long-distance driving.
Standardized dynamic wireless power transfer (WPT, also called wireless charging) allows the BEV/PHEV customer an automated, seamless, and more convenient alternative to plug-in (conductive) charging while the vehicle is in motion. Essentially, the customer simply drives upon an SAE J2954/3 -compatible road/ surface. D-WPT offers the additional advantage to automated enabling autonomous parking with alignment assistance and automated charging (in all weather conditions, such as rain or snow).
This standard is an evolution of SAE J2954, which is based on actual bench testing and vehicle interoperable data taken around the world. SAE J2954 is meant to harmonize with standards developing organizations in order to make a world-wide WPT standard to 11.1 kVA, useful for commercial applications. The SAE Wireless Power Transfer Task Force (WPT-TF) harmonized with numerous standard organizations (AAMI, ANSI, CISPR, GB, ISO, IEC, UL, VDA) towards these goals and specifically the documents produced in ISO and IEC. The SAE WPT TF has planned to test actual systems both in government laboratories and private.
