Laboratory WPT3 11kW Wireless Power Transfer System compliant to IEC 61980 Class B H-Field Limits based on Reference Designs

In this paper we present a laboratory-style 11 kW Wireless Power Transfer (WPT) system based on the IEC 61980/SAE J2954 reference designs for coils and system architecture. To the knowledge of the authors, it is the first of its kind that’s H-Field emissions were measured to be below the IEC 61980 Class B limits in the range of 9 kHz to 30 MHz. We present different approaches to reduce emissions and analyze emission measurement results illustrating their influence. We discuss the applicability to product designs and limits of the presented system.