Selective harmonic elimination method of radiation noise from automotive wireless power transfer system using active rectifier

Because wireless power transfer (WPT) systems used in automotive vehicles are likely to cause electromagnetic interference (EMI) with sensors, antennas, and controllers, the magnetic near-field spectrum from a WPT system has to be investigated and controlled properly. In this paper, we propose a selective harmonic elimination (SHE) method of the radiation noise from an automotive WPT system to reduce EMI caused by fast switching transitions of a resonant inverter and rectifier used for WPT systems. The simulated EMI spectra show that the significant reduction up to 30 dB in the harmonic components can be achieved by using the proposed SHE method.