Enhancing the Power Adaptability of PT-Symmetric Wireless Power Transfer System Using a Buck-Boost Converter

In recent years, with the development of the intelligent era, wireless power transfer (WPT) has become a mature electric power transfer technology, and the principle of Parity-Time symmetry (PT) is applied to WPT in order to ensure the stability of wireless power transfer. Although PT-WPT performs very stably under PT symmetry, variations in load can still affect the stability of its output power. By adding a buck-boost converter on the receiver side, constant power output can be achieved by adjusting the duty cycle D when the load resistance changes. Similarly, when the load resistance remains constant, adjusting the duty cycle D enables different power levels to accommodate diverse application scenarios.