High-efficiency piezoelectric transformers for magnetic-less DC-DC power conversion
Radial-mode piezoelectric transformers with optimized geometry and material properties address inefficiencies in existing DC-DC converters, achieving high efficiency and zero-voltage switching, enhancing power conversion capabilities.
WO2026107470A1 Publication Date: 2026-05-21RGT UNIV OF CALIFORNIA
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Patent Information
- Application Number
- PCT/US2025/055846
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-11-18
- Filing Date
- 2025-11-18
- Publication Date
- 2026-05-21
AI Technical Summary
Technical Problem
Magnetic components in power converters limit miniaturization due to low power densities and inefficiencies, and existing piezoelectric transformer-based DC-DC converters achieve only modest efficiencies and power densities, especially in isolated configurations.
Method used
Designing radial-mode piezoelectric transformers with specific geometry and material properties to maximize efficiency and ensure zero-voltage switching, using a full-bridge/full-bridge DC-DC converter topology.
Benefits of technology
Achieves peak efficiency of 98.3% in isolated DC-DC converters, significantly reducing loss ratios and expanding the utility of piezoelectric transformers to a broader range of power conversion applications.
✦ Generated by Eureka AI based on patent content.
Abstract
A power converter includes a piezoelectric transformer comprising a piezoelectric material and metalized electrodes that form two or more ports, at least one of the two or more ports being an input port having an input port surface area, at least one of the at least two ports being an output port having an output port surface area, wherein, the piezoelectric transformer has a physical characteristic of a geometry term H comprised of piezoelectric transformer dimensions at least one of input port and output port measurements, including and a voltage swing across the input port, a voltage swing across the output port, a charge utilization at the input port, a charge utilization at the output port, an input voltage, an output voltage, and a transformation ratio.
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