A Bias-Flip Rectifier With Duty-Cycle-Based MPPT for Piezoelectric Energy Harvesting

Journal article (2024)

Authors

X. Yue Electronic Instrumentation - EEMCS
L.S. Javvaji Electronic Instrumentation - EEMCS
Z. Tang Electronic Instrumentation - EEMCS , Vango Technologies Inc., Hangzhou
K.A.A. Makinwa Microelectronics
S. Du Electronic Instrumentation - EEMCS
Research Group
Electronic Instrumentation (EEMCS) (TU Delft)
Energy harvesting Energy harvesting Vibrations Power generation Maximum power point tracking (MPPT) Capacitors Rectifiers Voltage measurement Bias-flip rectifier Maximum power point trackers Synchronized switch harvesting on inductor (SSHI) Duty-cycle-based (DCB) Piezoelectric energy harvester
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Published Date

2024

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

Abstract

Bias-flip rectifiers are commonly employed for piezoelectric energy harvesting (PEH). This article proposes a synchronized switch harvesting on an inductor (SSHI) rectifier with a duty-cycle-based (DCB) maximum power point tracking (MPPT) algorithm. The proposed DCB MPPT algorithm is based on the mathematically derived relation between the MPPT efficiency and the duty cycle of the bridge rectifier. The resulting equation shows that the MPPT efficiency only depends on the rectifier duty cycle, and is independent of any other system variables, such as voltage bias-flipping efficiency, the open-circuit voltage from the harvester, vibration frequency, etc. As a result, MPPT can be achieved by regulating the duty cycle, simplifying circuit implementation, and achieving self-regulating and continuous MPPT. This design was fabricated in a 180-nm BCD process. The measured results show 98% peak MPPT efficiency and up to 738% output power enhancement.