High-Order Parity-Time Symmetry Wireless Power Transfer System and Method
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United States of America Patent
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Jun 20, 2024
app pub date -
Apr 12, 2021
filing date -
Apr 12, 2021
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Abstract
The present invention relates to a high-order parity-time (PT) symmetry wireless power transfer (WPT) system and method. The method includes the following steps: providing an N-order composite coil which includes N resonance circuits, where N is an odd number; providing an M-order composite coil which includes M resonance circuits, where M is an even number; connecting a scattering capacitor to end portions of two adjacent resonance circuits; coupling the first resonance circuits in the two composite coils to realize WPT; connecting a load to an alternating current power supply; and adjusting a capacitor in the resonance circuit symmetrical to the two first resonance circuits according to a change in coupling strength caused by a change in coupling distance in a WPT process to obtain an optimal transfer efficiency. According to the present invention, frequency tracking is not required for WPT by utilizing a unique pure real number eigenfrequency which is unrelated to a coupling distance and is represented by odd-order PT symmetry, and a capacitor size is adjusted according to a change in coupling distance to obtain a better transfer efficiency.
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