Study on the influence of frequency splitting of a WPT system on high frequency conducted EMI

With the rapid development of wireless power transfer (WPT) technology, the importance of electromagnetic interference and frequency splitting have attracted enough attention. However, few people link the two problems together. In this paper, based on the establishment of the high frequency equivalent model of the series-series resonant WPT system, the frequency splitting and detuning of the system are considered simultaneously to explore the influence on system conducted electromagnetic interference (EMI). The issue was analyzed and figured out by theoretical calculation, circuit simulation and experimental detection. The common mode (CM) noise of power side is simulated and measured under these conditions.