A New Topology of DC-DC Converter Based On Piezoelectric Resonator
Mustapha Touhami, Ghislain Despesse, François Costa
Abstract
This paper presents a new topology of DC-DC converter based on a piezoelectric resonator (PR). We introduce the principle conversion and an analytical model in steady state operating. A prototype was fabricated for experimental validation, and the first results demonstrate the conversion principle. The proposed prototype, operating initially in radial mode, achieved an efficiency higher than 95% for power conversion up to 10 W at 120 - 48 V input-output voltage, and an efficiency of 93% was measured for 16 W. Furthermore, an efficiency of 85 % at output power of 38 W was achieved by parallelizing 3-PRs. In addition, the thickness operating mode is demonstrated at 1 MHz, and exhibited an output power of 40 W with an efficiency of 85 % for 120 - 48 V input-output voltage, and a peak output power is obtained at 80 W. A peak output power of 100 W is reached for input-output voltage of 200- 60 V with an efficiency of 83.5 %. These first results showed good performances for DC-DC converter based on a PR well matched for high-to-low voltage conversion and low power conversion.