Impedance matching range extension method for maximum power transfer tracking in IPT system

Impedance matching is a common method to realize maximum power transfer. It's usually implemented by using a power electronics converter such as Buck converter. However, the impedance transformation range is limited by the Buck converter characteristics, and the range has not been discussed in previous papers. This paper proposes a novel impedance matching method for maximum power transfer tracking. The method can extend the impedance matching range by switching CCM and DCM mode in a Buck converter. With this method, load impedance varying range can be extended greatly than classical CCM running mode.