학술논문
A Novel Rectifier-Less Synchronous Electric Charge Extraction and Inversion Interface Circuit for PE Energy Harvesters
Document Type
Periodical
Source
IEEE Transactions on Power Electronics IEEE Trans. Power Electron. Power Electronics, IEEE Transactions on. 39(3):3749-3759 Mar, 2024
Subject
Language
ISSN
0885-8993
1941-0107
1941-0107
Abstract
A novel rectifier-less synchronous electric charge extraction and inversion (ReL-SECEI) interface circuit for Piezoelectric energy harvesters is proposed in this article. At the peak voltages of the Piezoelectric Transducer (PZT), a portion of electric charges is inverted on the clamped capacitance C p , so that the PZT is automatically regulated at a higher output voltage state to improve extracted energy from the PZT. In addition, the self-powered implementation of the ReL-SECEI circuit is presented. It reduces the number of components by optimizing the positive and negative synchronous switches. The rectifier-less and simplified designs reduce the internal power loss and, hence, improve the energy harvesting efficiency. The ReL-SECEI circuit is verified by the experiment, the harvested power is load-dependent and the peak output power is obtained with the optimum load, which reaches 4.2 times that of the standard energy harvesting circuit.