期刊
IEEE TRANSACTIONS ON ENERGY CONVERSION
卷 37, 期 1, 页码 505-514出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TEC.2021.3103879
关键词
Capacitors; Rectifiers; Partial discharges; Inductors; Power generation; Switches; Switching circuits; AC; DC conversion; low power energy conversion; boost; buck-boost conversion; switching circuit; piezoelectric energy harvesting
资金
- Southern Cross University, Lismore, Australia
In this paper, a rectifier-less boost converter circuit for piezoelectric energy harvesting was proposed. The circuit could extract energy from a low amplitude AC voltage and achieve high output power. It has the potential to be applied in low power demand applications such as sensors, quartz watches, and portable charging devices.
In this paper, a single-stage rectifier-less boost converter circuit (SSRBC) for piezoelectric energy harvesting from ambient vibration was proposed. The proposed rectifier-less circuit acted as a boost converter to extract energy from a piezoelectric device (PD). It combined the conventional boost, buck-boost methods using two split inductors and single filter capacitor. The proposed integrated circuit topology functioned in both positive and negative half cycles generated by the PD. In the proposed topology, inductors were invigorated by being enveloped with the current, which was produced by the PD through the switches. This facilitated active rectification of ultra-low AC (amplitude < 0.5 V-P). Theoretical analysis, control strategies, simulation and experimental study were presented. The proposed circuit was capable of converting a low amplitude AC voltage of 0.5 V-P into 5.1 V-dc. The highest output power extracted by the proposed circuit was 281.1 mu W, which outperformed existing circuits. It could potentially facilitate the advancement of vibration-based energy harvesting systems for low power demand applications such as sensors, quartz watches and portable charging devices.
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