scholarly journals An Efficient CMOS Dual Switch Rectifier for Piezoelectric Energy-Harvesting Circuits

Electronics ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 66 ◽  
Author(s):  
Amad Ud Din ◽  
Muhammad Kamran ◽  
Waqar Mahmood ◽  
Khursheed Aurangzeb ◽  
Abdulaziz Saud Altamrah ◽  
...  
Keyword(s):  
Threshold Voltage ◽  
Power Conversion ◽  
Research Work ◽  
Piezoelectric Energy Harvesting ◽  
Energy Scavenging ◽  
Cmos Process ◽  
Power Extraction ◽  
Active Rectifier ◽  
Piezoelectric Energy ◽  
Bridge Rectifier

In this research work, we investigated a dual switch (DS) active rectifier for the piezoelectric (PE) energy scavenging system. In the proposed DS active rectifier configuration, two extra switches are shunted across the PE transducer which helps the PE transducer’s capacitor in charging and discharging which results in maximum power extraction from the PE transducer. Moreover, in the proposed rectifier configuration comparator controlled active diodes are used instead of conventional/passive diodes to minimize the threshold voltage V T H drop. The proposed DS active rectifier design is fabricated in a 1-poly 6-metal 180-nm standard CMOS process. The simulation and measured results of the proposed DS active rectifier design have the better power conversion efficiency (PCE) of 91.5 %, which definitely helps in extracting more power than the conventional full bridge rectifier (FBR).

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.

scholarly journals A Self-Powered Hybrid SSHI Circuit with a Wide Operation Range for Piezoelectric Energy Harvesting

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 615
Author(s):  
Liao Wu ◽  
Peidong Zhu ◽  
Minghua Xie
Keyword(s):  
Energy Harvesting ◽  
Output Voltage ◽  
Power Conversion ◽  
Piezoelectric Energy Harvesting ◽  
Half Cycle ◽  
Voltage Range ◽  
Piezoelectric Energy ◽  
Capacitor Voltage ◽  
Bridge Rectifier ◽  
Self Powered

This paper presents a piezoelectric (PE) energy harvesting circuit, which integrates a Synchronized Switch Harvesting on Inductor (SSHI) circuit and a diode bridge rectifier. A typical SSHI circuit cannot transfer the power from a PE cantilever into the load when the rectified voltage is higher than a certain voltage. The proposed circuit addresses this problem. It uses the two resonant loops for flipping the capacitor voltage and energy transfer in each half cycle. One resonant loop is typically used for the parallel SSHI scheme, and the other for the series SSHI scheme. The hybrid SSHI circuit using the two resonant loops enables the proposed circuit’s output voltage to no longer be limited. The circuit is self-powered and has the capability of starting without the help of an external battery. Eleven simple discrete components prototyped the circuit. The experimental results show that, compared with the full-bridge (FB) circuit, the amount of power harvested from a PE cantilever and the Voltage Range of Interest (VRI) of the proposed circuit is increased by 2.9 times and by 4.4 times, respectively. A power conversion efficiency of 83.2% is achieved.

Bridgeless active rectifier for piezoelectric energy harvesting

2019 ◽  
Vol 13 (7) ◽  
pp. 1078-1085 ◽  
Author(s):  
Raghavendran Srinivasan ◽  
Umapathy Mangalanathan ◽  
Uma Gandhi ◽  
Lakshmi Ravikularaman Karlmarx
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Energy Harvesting ◽  
Active Rectifier ◽  
Piezoelectric Energy
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