A Wide Power Range Segment Control and Soft-Switching Implementation Method Based on AVC-VF Control

When EV-WPT system outputs in a wide range, the inverter runs in the non-soft switching region and the control stability is poor. Aiming at this problem, this paper studies the soft-switching control strategy of inverter under wide power range output, gives a segment control method based on asymmetric voltage cancellation-variable frequency (AVC-VF) control, establishes the model of EV-WPT system and analyzes its characteristics. A segment control method to realize wide-range output is given, and the conditions for the inverter to realize ZVS under the control of this method are given. According to this condition, a segment control method based on AVC-VF control is proposed, which can realize the widerange output of the system and keep the soft-switching operation of the inverter, effectively reduce the energy loss of the inverter, thus improving the system efficiency. In addition, the method is verified by simulation.