A High Efficiency Self-Powered Rectifier for Piezoelectric Energy Harvesting Systems

2016 ◽  
Vol 25 (12) ◽  
pp. 1650164 ◽  
Author(s):  
Jingmin Wang ◽  
Zheng Yang ◽  
Zhangming Zhu ◽  
Yintang Yang
Keyword(s):  
Energy Harvesting ◽  
Power Efficiency ◽  
High Efficiency ◽  
Supply Voltage ◽  
Voltage Drop ◽  
Current Source ◽  
Power Extraction ◽  
Piezoelectric Energy ◽  
Harvesting Systems ◽  
Self Powered

A high efficiency self-powered rectifier for piezoelectric (PE) energy harvesting systems is proposed. The rectifier in this paper increases the harvested power from the PE transducer by using two switches to reset the transducer capacitor when appropriate. The control circuit for the proposed rectifier is simple and does not require an external supply voltage. Furthermore, the passive diode of the conventional full-bridge (FB) rectifier is replaced by active diode to reduce the voltage drop along the conduction path and thereby increases the power extraction and conversion capability. Based on SMIC 0.18[Formula: see text][Formula: see text]m standard CMOS technology, the simulation results show the voltage conversion efficiency can reach up to 98.9% and the maximum power efficiency is 93.1% when the input current source [Formula: see text]A in parallel with internal capacitor [Formula: see text][Formula: see text]nF and internal resistor [Formula: see text][Formula: see text]M[Formula: see text].

Embedded Metamaterial Subframe Patch for Increased Power Output of Piezoelectric Energy Harvesters

2021 ◽  
pp. 1-9
Author(s):  
Saman Farhangdoust ◽  
Gary Georgeson ◽  
Jeong-Beom Ihn ◽  
Armin Mehrabi
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Renewable Energy Sources ◽  
Piezoelectric Element ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Harvesting Systems ◽  
Host Structure ◽  
Self Powered ◽  
Low Efficiency

Abstract These days, piezoelectric energy harvesting (PEH) is introduced as one of the clean and renewable energy sources for powering the self-powered sensors utilized for wireless condition monitoring of structures. However, low efficiency is the biggest drawback of the PEHs. This paper introduces an innovative embedded metamaterial subframe (MetaSub) patch as a practical solution to address the low throughput limitation of conventional PEHs whose host structure has already been constructed or installed. To evaluate the performance of the embedded MetaSub patch (EMSP), a cantilever beam is considered as the host structure in this study. The EMSP transfers the auxetic behavior to the piezoelectric element (PZT) wherever substituting a regular beam with an auxetic beam is either impracticable or suboptimal. The concept of the EMSP is numerically validated, and the COMSOL Multiphysics software was employed to investigate its performance when a cantilever beam is subjected to different amplitude and frequency. The FEM results demonstrate that the harvesting power in cases that use the EMSP can be amplified up to 5.5 times compared to a piezoelectric cantilever energy harvester without patch. This paper opens up a great potential of using EMSP for different types of energy harvesting systems in biomedical, acoustics, civil, electrical, aerospace, and mechanical engineering applications.

scholarly journals Resonant Rectifier ICs for Piezoelectric Energy Harvesting Using Low-voltage Drop Diode Equivalents

2017 ◽  
Author(s):  
Amad Ud Din ◽  
Seneke Chamith Chandrathna ◽  
Jong-Wook Lee
Keyword(s):  
Energy Harvesting ◽  
Integrated Circuits ◽  
Low Voltage ◽  
Voltage Drop ◽  
Power Conversion ◽  
Cmos Process ◽  
Power Extraction ◽  
Piezoelectric Energy ◽  
Bridge Rectifier ◽  
External Power

Herein, we present the design technique of a resonant rectifier for piezoelectric (PE) energy harvesting. We propose two diode equivalents to reduce the voltage drop in the rectifier operation, a minuscule-drop-diode equivalent (MDDE) and a low-drop-diode equivalent (LDDE). The diode equivalents are embedded in resonant rectifier integrated circuits (ICs), which use symmetric bias-flip to reduce the power wasted for charging and discharging the internal capacitance of a PE transducer. The self-startup function is supported by synchronously generating control pulses for the bias-flip from the PE transducer. Two resonant rectifier ICs, using both MDDE and LDDE, are fabricated in a 0.18 μm CMOS process and their performances are characterized under external and self-power conditions. Under the external-power condition, the rectifier using LDDE delivers an output power POUT of 564 μW and a rectifier output voltage VRECT of 3.36 V with a power conversion efficiency (PCE) of 90.1%. Under self-power conditions, the rectifier using MDDE delivers a POUT of 288 μW and a VRECT of 2.4 V with a corresponding PCE of 74.6%. The result shows that the power extraction capability of the proposed rectifier is 5.9 and 3.0 times higher than that of a conventional full-bridge rectifier.

An Efficient Interface Circuit for Miniature Piezoelectric Energy Harvesting with P-SSHC

2019 ◽  
Vol 29 (08) ◽  
pp. 2020004
Author(s):  
Lianxi Liu ◽  
Yu Shang ◽  
Jiangwei Cheng ◽  
Zhangming Zhu
Keyword(s):  
Energy Harvesting ◽  
High Efficiency ◽  
Piezoelectric Energy Harvesting ◽  
Cmos Process ◽  
Two Stage ◽  
Zero Crossing ◽  
Interface Circuit ◽  
Power Extraction ◽  
Piezoelectric Energy ◽  
Synchronous Rectifier

A miniature and high-efficiency interface circuit based on parallel synchronous switch harvesting on capacitors (P-SSHC) for piezoelectric energy harvesting (PEH) is proposed in this paper. This interface circuit consists of a two-stage synchronous rectifier and the P-SSHC circuit. The two-stage synchronous rectifier, composed of a negative voltage converter (NVC) and an active diode (AD), achieves higher efficiency compared with the full-bridge rectifier (FBR). In addition, the two-stage synchronous rectifier detects the zero-crossing moment of the input current; therefore, an extra current zero-crossing detection circuit is eliminated, which simplifies the structure of the interface circuit, reduces power consumption and improves peak converting efficiency. The P-SSHC circuit aims to improve the power extraction capability of the rectifier. The P-SSHC achieves considerable voltage flipping efficiency with very small volume compared to the parallel synchronized switch harvesting on inductor (P-SSHI), which is more suitable for volume sensitive applications. The proposed interface circuit is designed in SMIC 0.35[Formula: see text][Formula: see text]m CMOS process. Simulation results show that it achieves a [Formula: see text] output power improvement compared with FBR for the case of a 3.4[Formula: see text]V open-circuit voltage, the voltage flipping efficiency is as high as 83.6% and the peak power converting efficiency is up to 91.5%. The overall volume of the capacitors used in this paper is only 0.6[Formula: see text]mm3, which is much smaller than the inductor used by conventional P-SSHI interface circuit.

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