Self-Powered Dual-Inductor MI-PSSHI-VDR Interface Circuit for Multi-PZTs Energy Harvesting

Vibration energy harvesting using multiple piezoelectric transducers (multi-PZTs) can increase its output power and environmental adaptability. At present, there are still few research articles on multi-input interface circuits for multi-PZTs, especially those using the parallel synchronized switching harvesting on inductor (PSSHI) technique. Therefore, this article presents a self-powered dual-inductor MI-PSSHI voltage doubler rectifier (VDR) interface circuit. It can process multi-PZT voltages with arbitrary phases input. The measurements demonstrate that the prototyped MI-PSSHI-VDR circuit can extract a peak power of 1.93x00A0;mW from four PZTs under an excitation of 1.5x00A0;g and 77.5x00A0;Hz. The energy integration efficiency and energy extraction efficiency of the prototyped circuit are 93.2x0025; and 75.1x0025;. Compared with a multi-input full-bridge rectifier, the proposed circuit can achieve 3.22x00D7; power improvement and 3.58x00D7; voltage improvement, which grasps a good balance between the indices of peak output power and load voltage range. Additionally, the MI-PSSHI-VDR circuit is easy to implement and shows a good scalability, which can be an alternative solution for multi-PZTs energy harvesting.

Automated summary

This study presents a self-powered dual-inductor MI-PSSHI voltage doubler rectifier (VDR) interface circuit for processing multi-PZT voltages with arbitrary phases input. The measurements demonstrate that the prototyped circuit can extract a high peak power from multiple PZTs, achieving a good balance between peak output power and load voltage range. Additionally, the proposed circuit is easy to implement and shows good scalability, making it an alternative solution for multi-PZTs energy harvesting.