Types of wireless charging:
There are two different types of wireless charging:
- Inductive type
- Resonant type
It requires direct physical contact between the power transmitter (i.e. wireless charger) and power receiver (i.e. smartphones). The charging coils inside the phone or case and the charger must be connected and aligned.
Resonant type charging requires the power receiver (i.e. smartphones), power transmitter (i.e. wireless charger), and charging coil within each, to be specific proximity but do not need to be touching. Here inductor coils (at transmitter and receiver as well) are tuned at a particular frequency to deliver more power.