30.3 A Bias-Flip Rectifier with a Duty-Cycle-Based MPPT Algorithm for Piezoelectric Energy Harvesting with 98% Peak MPPT Efficiency and 738% Energy-Extraction Enhancement

30.3 A Bias-Flip Rectifier with a Duty-Cycle-Based MPPT Algorithm for Piezoelectric Energy Harvesting with 98% Peak MPPT Efficiency and 738% Energy-Extraction Enhancement

Yue, X. (TU Delft Electronic Instrumentation)
Javvaji, L.S. (TU Delft Electronic Instrumentation)
Tang, Z. (TU Delft Electronic Instrumentation)
Makinwa, K.A.A. (TU Delft Microelectronics)
Du, S. (TU Delft Electronic Instrumentation)

Microelectronics

2023

Synchronized bias-flip rectifiers, such as synchronized switch harvesting on inductor (SSHI) rectifiers, are widely used for piezoelectric energy harvesting (PEH) [1], which can replace the use of batteries in many loT applications, thus reducing both system volume and maintenance cost. However, the output power extracted by such rectifiers strongly depends on the impedance matching between the piezoelectric transducer (PT) and the circuit. To maximize this, two maximum power point tracking (MPPT) algorithms are often used. As shown in Fig. 30.3.1 (left), the Perturb & Observe (P&O) (a.k.a. hill-climbing) algorithm adjusts the rectified output power in a stepwise manner towards the maximum power point (MPP), thus establishing robust and continuous MPPT. However, accurately sensing the rectified output power often requires complex and power-hungry hardware [1], [2]. Another simpler algorithm is based on the fractional open-circuit voltage (FOCV) and involves periodically measuring the PT's open-circuit voltage amplitude (VOC) and regulating the rectified voltage (VREC) to a level (VMPP), which corresponds to the MPP [3-6]. However, the PT must be periodically disconnected from the rectifier to measure VOC, resulting in wasted energy, while the inherent delay in sensing VOC variations reduces the overall tracking efficiency. Furthermore, a calibration step is usually necessary to determine VMPP, since this depends on the actual PT voltage flip efficiency (etaF) of the bias-flip rectifier.

http://resolver.tudelft.nl/uuid:6b0abf48-27db-465d-a7c2-af286c27a711

https://doi.org/10.1109/ISSCC42615.2023.10067284

Institute of Electrical and Electronics Engineers (IEEE)

2023-09-23

9781665428002

2023 IEEE International Solid-State Circuits Conference, ISSCC 2023

2023 IEEE International Solid-State Circuits Conference, ISSCC 2023, 2023-02-19 → 2023-02-23, Virtual, Online, United States

Digest of Technical Papers - IEEE International Solid-State Circuits Conference, 0193-6530, 2023-February

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

conference paper

© 2023 X. Yue, L.S. Javvaji, Z. Tang, K.A.A. Makinwa, S. Du