Dynamic Response and Stability Margin Improvement of Wireless Power Receiver Systems via Right-Half-Plane Zero Elimination

The series-series compensation topology is widely adopted in many wireless power transfer applications. For such systems, their receiver part typically involves a dc–dc converter with front-stage full-bridge diode rectifier, to process the high-frequency transmitted ac into dc output voltage for load. It recently reported that current source nature of will introduce right-half-plane (RHP) zeros small-signal functions receiver, which severely affect stability and dynamic response system. To resolve this issue, article, it proposed adopt different rectifier configuration system input becomes controllable eliminate presence RHP This can be applied receivers using buck, buck-boost, or boost converters. As compared original receivers, modified ones feature minimum-phase characteristics hence ease design compensator. Theoretical experimental results are provided. comparative verify elimination zero, improved responses reference tracking against load disturbances, larger margin.