T17.9 - High-Efficiency Isolated Piezoelectric Transformers for Magnetic-Less DC-DC Power Conversion

Wednesday, March 19, 2025

4:40 PM – 5:00 PM ET

Location: Level Three, A301

Technical Lecture Presenter(s)

Sourav Naval (he/him/his)

University of California, Berkeley

Presentation Paper

Co-Author(s)

WX

Wentao Xu

University of California, Berkeley
MT

Mustapha Touhami

University of California, Berkeley
JB

Jessica Boles

University of California, Berkeley

Piezoelectric components are promising alternative passive components for power conversion, offering high efficiency and high energy densities at small scales. In this paper, we model, design, and demonstrate isolated piezoelectric transformers to be capable of high efficiencies as primary passive components in magnetic-less dc-dc converters. The proposed PT design is validated in a dc-dc converter prototype that demonstrates a peak efficiency of 97.5 %, which represents a 17x reduction in loss ratio compared to previous isolated magnetic-less PT-based dc-dc converter designs.