EMI in Wireless Power Transfer Designs (.PDF Download)

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Wireless power transfer (WPT) technology, an excellent technology for easier and safer battery charging, doesn’t use a wired electrical contact that can cause an unwanted electric spark or even deliver dangerous electric current to users. When transferring power from a source to a battery or other load, strong electromagnetic fields (EMFs) will be generated. The vehicle power inverter charger output will have a wide range of harmonics.

Designers are tasked with reducing the electromagnetic fields (EMFs) and electromagnetic interference (EMI) in WPT systems. What follows are some methods that will help designers create a robust and safe WPT design while minimizing EMI.