Approachable Modeling of Multi-port Piezoelectric Components for Power Conversion

Piezoelectric components have emerged as compelling alternative passive components for power electronics, with single-port piezoelectric resonators having demonstrated both high efficiency and high power density. However, numerous power electronics applications will require multi-port piezoelectric components, such as piezoelectric transformers, but modeling of multi-port components is complex and requires cumbersome derivations. In this paper, we derive a circuit model for multi-port piezoelectric components and provide multiple straightforward strategies for obtaining its model parameters. The proposed modeling strategy for multi-port piezoelectric components is validated experimentally for a 3-port radial-mode piezoelectric component.