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An Efficient Inductor-less Dynamically Configured Interface Circuit for Piezoelectric Vibration Energy Harvesting
Du, Sijun Jia, Yu Seshia, Ashwin A.
Du, Sijun
Jia, Yu
Seshia, Ashwin A.
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2016-07-07
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Abstract
Vibration energy harvesting based on piezoelectric materials is of interest in several applications such as in powering remote distributed wireless sensor nodes for structural health monitoring. Synchronized Switch Harvesting on Inductor (SSHI) and Synchronous Electric Charge Extraction (SECE) circuits show good power efficiency among reported power management circuits; however, limitations exist due to inductors employed, adaption of response to varying excitation levels and the Synchronized Switch Damping (SSD) effect. In this paper, an inductor-less dynamically configured interface circuit is proposed, which is able to configure the connection of two piezoelectric materials in parallel or in series by periodically evaluating the ambient excitation level. The proposed circuit is designed and fabricated in a 0:35 μm HV CMOS process.The fabricated circuit is co-integrated with a piezoelectric bimorph energy harvester and the performance is experimentally validated. With a low power consumption (0:5 μW), the measured results show that the proposed rectifier can provide a 4.5 boost in harvested energy compared to the conventional full-bridge rectifier without employing an inductor. It also shows a high power efficiency over a wide range of excitation levels and is less susceptible to SSD.
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Du., S., Jia, Y., & Seshia, A. A. (2016). An Efficient Inductor-less Dynamically Configured Interface Circuit for Piezoelectric Vibration Energy Harvesting. IEEE Transactions on Power Electronics, PP(99). DOI: 10.1109/TPEL.2016.2587757
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IEEE
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IEEE Transactions on Power Electronics
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Article
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en
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(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
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0018-9200