High-Order Parity-Time Symmetry Wireless Power Transfer System and Method

A high-order parity-time (PT) symmetry wireless power transfer (WPT) system, comprising:

• an N-order composite coil, comprising N resonance circuits, wherein N is an odd number greater than or equal to 1, and when N is greater than or equal to 3, a scattering capacitor is connected to connection end portions of two adjacent resonance circuits in the N-order composite coil;
• an M-order composite coil, comprising M resonance circuits, wherein M is an even number greater than or equal to 2, and a scattering capacitor is connected to connection end portions of two adjacent resonance circuits in the M-order composite coil, and the first resonance circuit in the N-order composite coil is coupled to the first resonance circuit in the M-order composite coil to realize WPT;
• a first port connected to the N-order composite coil, where the first port is connectable to a load or an alternating current power supply;
• a second port connected to the M-order composite coil, where the second port is connectable to an alternating current power supply or a load;
• and
• a processing module connected to the N-order composite coil or the M-order composite coil, the processing module being configured to adjust capacitors in resonance circuits symmetrical to the first resonance circuit in the N-order composite coil and the first resonance circuit in the M-order composite coil among the N+M resonance circuits according to a change in coupling strength between the first resonance circuit in the N-order composite coil and the first resonance circuit in the M-order composite coil to obtain an optimal power transfer efficiency of the system.