Configurable Hybrid Energy Synchronous Extraction Interface With Serial Stack Resonance for Multi-Source Energy Harvesting

• Published in: IEEE journal of solid-state circuits 2023-02, Vol.58 (2), p.451-461
• Main Authors: Wang, Xiudeng, Xia, Yinshui, Zhu, Zhangming, Shi, Ge, Xia, Huakang, Ye, Yidie, Chen, Zhidong, Qian, Libo, Liu, Lianxi
• Format: Article
• Language: English
• Subjects: Capacitors; Circuits; Energy harvesting; Inductors; Integrated circuit modeling; multi-source; photovoltaic (PV) cell; Photovoltaic cells; piezoelectric transducer (PZT); Piezoelectric transducers; Resonance; RLC circuits; serial stack resonance (SSR); thermoelectric generator (TEG); Thermoelectric generators; Time division multiplexing; Voltage
• ISSN: 0018-9200; 1558-173X
• DOI: 10.1109/JSSC.2022.3182118

Conventional multi-source energy harvesters use the time-division multiplexing (TDM) scheme, where the inductor operates in discontinuous current mode (DCM) and fails to perform well in continuous current mode (CCM). This article presents a single-inductor hybrid energy synchronous extraction circuit with serial stack resonance (SSR) for multi-source energy harvesting. The proposed circuit incorporates a synchronous electric charge extraction (SECE) circuit for ac energy and two buck-boost circuits for dc energy with a single inductor, which can operate either in a TDM mode to harvest energy from different sources separately or in an SSR mode to extract energy from multiple sources synchronously. The proposed harvester is fabricated in a 0.18- \mu \text{m} CMOS process. It is configured with a photovoltaic (PV) cell, a thermoelectric generator (TEG), and two piezoelectric transducers (PZTs), where the number of PZTs is flexible to meet different application needs.