Bench Test Validation of Wireless Power Transfer up to 7.7kW Based on SAE J2954

Paper #:
  • 2017-01-2448

  • 2017-10-08
Wireless Power Transfer (WPT) is to be commercialized in the very near future. There are however many technology challenges. The SAE J2954 Taskforce published a guideline or Technical Information Report in 2016 to help in the harmonization in the first phase of this technology. SAE J2954 is a performance-based approach for WPT by specifying ground and assembly coils to be used in a test stand (per Z-Height) to validate interoperability. However, there were two types of technologies used for the topologies of these coils in SAE J2954. The main goal of this SAE J2954 testing campaign was to prove interoperability and the guideline contained within. The main challenge is that this type of testing had not been done before on such a scale with real automaker and supplier systems. Automakers, suppliers and government employees worked together to create this test plan and resuts. In order to validate the interoperability, performance, and EMC & EMF of this technology, a bench test was created by the SAE J2954 team with the US Department of Energy's Idaho National Lab and TDK North America. To add complexity, he tests were done between two different power classes (between 3.7 to 7.7kW) and two different topologies (circular and double-D). This report describes the testing and gives the results for these different WPT systems. This testing validates the first stage of SAE J2954 standardization and proves that WPT is not only possible over an air gap of 25cm but interoperable over power classes and technologies with high efficiencies (many tests were above 90%).
Also in:
  • SAE International Journal of Passenger Cars - Electronic and Electrical Systems - V127-7
  • SAE International Journal of Passenger Cars - Electronic and Electrical Systems - V127-7EJ
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