Charger topology selection for group charging of volume tablet scale devices through wireless power transfer
In group activities, tablet scale devices are convenient in applications, such as for trip group message broadcast/communication. This work is to provide proper charger topologies, and the targeted chargers charge all devices in the same time before given to users. The number of devices is from low tens to high tens. We analyze possible scenarios and propose two charger topologies. One is tube-shape for up to twenty devices, and the other is cubic-shape for more devices up to high tens. Corresponding coil placements are designed, magnetic flux and phases of driving current are discussed.