Wireless Power Coil Array Switching for Thin Efficient Charging

The power transmission device divides the coil array into multiple independently controllable coil groups. Instead of using a single large coil with many turns, the system segments the magnetic field generation into multiple smaller coil units that can be selectively activated based on the position of the power receiving device, thereby maintaining transmission efficiency without increasing overall device thickness.

The system dynamically selects and activates specific coil groups based on the real-time position of the power receiving device. This dynamic adaptation allows the power transmission device to maintain high coupling efficiency with the receiver without requiring all coils to be permanently active or densely packed, thus reducing the required device thickness.

The coil array is segmented into multiple independent coil groups that can be individually controlled. This segmentation simplifies the control logic by allowing the system to activate only the relevant coil groups based on receiver position, rather than managing a single complex array, thereby reducing overall system complexity while maintaining ease of operation.

The control circuitry continuously monitors the position of the power receiving device and provides feedback to dynamically adjust which coil groups are active. This feedback mechanism automates the positioning adaptation, eliminating the need for manual alignment while keeping the control system relatively simple through rule-based selection of active coils.