WIRELESS POWER TRANSMISSION SYSTEM ADAPTED FOR MULTILOAD DYNAMIC SWITCHING

摘要

A wireless power transmission system adapted for multiload dynamic switching comprises a primary module for transmitting electric energy and a second module for picking up electric energy. The primary module transmits electric energy to the secondary module by using electromagnetic coupling resonance, and when the secondary module switches different power loads, the secondary module gradually changes, by using soft switching, a secondary reflected impedance by using a mode of gradually increasing voltages on two sides of a load, so that changes of a resonance frequency and a phase of the primary module are kept in a self-adaptive range of frequency tracking and control. The primary module can make stable adjustment according a dynamic change of the load, making the primary module stably work; in addition, for an output voltage of a system, because soft switching is used to change the load in load switching, the impact of a load change on the system resonance is reduced, and the stability of a secondary output voltage is ensured.