WPT for EVs and the Effect on AM Radio Broadcasts

As more and more electric vehicles (EVs) continue to be utilized both by the public and by government agencies to help reduce our carbon footprint and reduce greenhouse emissions, the infrastructure used to power these vehicles continues to grow.

An un-welcome side effect of this, is that Wireless Power Transfer Systems (which relies on switching frequencies that generate interference in the AM radio bands), can interrupt AM radio broadcasts in several frequency ranges. 

EMI interference can be mitigated by using shieled cables, installing filters, and perhaps utilizing ferrite beads as required, however because of the nature of wireless charging technology (which transmits power through the air as a magnetic field), these mitigation efforts cannot be utilized.

If you are the manufacturer of equipment and need assistance with EMI/EMC testing for either wired or wireless platforms, reach out today.  F2 Labs can assist with many compliance needs for FCC, Industry Canada, as well as CE Mark evaluations


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