正激变换器
谐振器
拓扑(电路)
压电
Ćuk转换器
反激变换器
充电泵
直流电动机
电子工程
材料科学
电气工程
物理
升压变换器
电容器
光电子学
工程类
电压
作者
Valentin Breton,Emile Bigot,Ghislain Despesse,François Costa
标识
DOI:10.1109/tpel.2023.3276478
摘要
This article presents a new isolated topology of dc–dc converter based on piezoelectric resonators. Contrary to most existing topologies, the proposed one uses the natural isolation of piezoelectric resonators to isolate the converter's output from the input and vice-versa. Considering the resonators' constraints, our study focuses on the most efficient isolated conversion cycle with zero-voltage switching (ZVS) operations. The case studied is a highly efficient step-down isolated dc–dc converter with a gain ranging from 0 to 1 and an input voltage up to 360 V. The converter uses two piezoelectric resonators working in series. The conversion principle is validated thanks to a prototype operating at a frequency around 95 kHz. Experimental measurements are made on a wide range of input voltage from 12 to 360 V with a conversion ratio of 0.0165 to 0.95. The output power reaches either 179.1 W with an 89% efficiency at 360 V input voltage and 346 V output voltage, or 4.5 W with a 97.2% peak efficiency for a 48 to 45.8 V conversion, using a 25 mm piezoelectric disc with a thickness of 2 and 1 mm, respectively. An efficiency higher than 80% is measured over a wide range of operating points.
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