A5091616308- Wireless Power Transfer Systems
- Innovative Energy Harvesting Technologies
- Acoustic Wave Resonator Technologies
- Advanced Sensor and Energy Harvesting Materials
- Advanced DC-DC Converters
Massachusetts Institute of Technology
2021-2022
Piezoelectric components offer several potential advantages to power conversion including high density and efficiency capabilities compared magnetics at small scales. Converter architectures have been developed for efficient utilization of piezoelectrics, but without fundamental criteria designing the piezoelectric themselves. In this article, we derive figures merit achievable efficiencies handling densities materials vibration modes based on realistic in a converter. These are likewise...
Piezoelectric components hold promise for realizing power conversion with unprecedented levels of handling density at small size scales. Dc-dc converter topologies and operating modes have recently been established high-efficiency utilization piezoelectrics, strategies piezoelectric material selection component design likewise identified high-performance conversion. In this letter, we apply these developments to experimentally demonstrate the extraordinary capabilities piezoelectrics. This...
Pursuits of miniaturization, greater performance, and lower cost for power electronics necessitate advancement passive component technologies. While wide-bandgap semiconductor devices advanced control techniques have enabled substantial size performance improvements, miniaturizing remains bottlenecked by the components dominating their sizes, particularly magnetics (i.e., inductors transformers). Magnetic pose fundamental handling efficiency challenges at small scales, amounting to densities...
With high efficiency and power density at small scales, piezoelectric resonators (PRs) are promising alternatives to magnetic components for miniaturized conversion. PRs have been demonstrated be capable of in dc-dc converters with favorable scalability sizes. In this work, we analytically show that augmenting mass layers additional inertial energy storage can further reduce component size while improving efficiency. We model the effects augmentation on behavior a PR as well its...
This paper describes emerging approaches in the design of power electronics aiming to address twin challenges miniaturization and efficiency through use piezoelectric-based energy storage elements. Piezoelectric components, including piezoelectric resonators transformers, store mechanical inertia compliance, with densities that are orders magnitude higher than those achievable magnetics at small scales. Piezoelectrics can potentially enable radical improvements size converters for some...