scholarly journals Impedance matching for broadband piezoelectric energy harvesting

2013 ◽  
Vol 476 ◽  
pp. 012083 ◽  
Author(s):  
F Hagedorn ◽  
J Leicht ◽  
D Sanchez ◽  
T Hehn ◽  
Y Manoli
Keyword(s):  
Energy Harvesting ◽  
Impedance Matching ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy

scholarly journals Study of a Low-Power-Consumption Piezoelectric Energy Harvesting Circuit Based on Synchronized Switching Technology

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3166
Author(s):  
Jianfeng Hong ◽  
Fu Chen ◽  
Ming He ◽  
Sheng Wang ◽  
Wenxiang Chen ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Theoretical Analysis ◽  
Power Consumption ◽  
Low Power ◽  
Impedance Matching ◽  
Maximum Energy ◽  
Low Power Consumption ◽  
Piezoelectric Energy Harvesting ◽  
Interface Circuit ◽  
Piezoelectric Energy

This paper presents a study of a piezoelectric energy harvesting circuit based on low-power-consumption synchronized switch technology. The proposed circuit includes a parallel synchronized switch harvesting on inductor interface circuit (P-SSHI) and a step-down DC-DC converter. The synchronized switch technology is applied to increase the conversion efficiency of the circuit. The DC-DC converter is used to accomplish the impedance matching for different loads. A low-power-consumption microcontroller and discrete components are used to build the P-SSHI interface circuit. The study starts with theoretical analysis and simulations of the P-SSHI interface circuit. Simulations and experiments were conducted to validate the theoretical analysis. The experimental results show that the maximum energy harvested by the system with a P-SSHI interface circuit is 231 μW, which is 2.89 times that of a system without the P-SSHI scheme. The power consumption of the P-SSHI interface circuit can be as low as 10.6 μW.

Self-Start Piezoelectric Energy Harvesting Circuit With Adjustable UVLO Converter for Wireless Sensor Network

2017 ◽  
Author(s):  
Hyun Jun Jung ◽  
Soobum Lee ◽  
Hamid Jabbar ◽  
Se Yeong Jeong ◽  
Tae Hyun Sung
Keyword(s):  
Wireless Sensor Network ◽  
Energy Harvesting ◽  
Sensor Network ◽  
Energy Harvester ◽  
Impedance Matching ◽  
Wireless Sensor ◽  
Experimental Result ◽  
Piezoelectric Energy Harvesting ◽  
Wireless Sensor Node ◽  
Piezoelectric Energy

This paper proposes a self-start piezoelectric energy harvesting circuit with an undervoltage-lockout (UVLO) converter for a wireless sensor network (WSN). First, a self-start circuit with mini piezoelectric energy harvester (PEH) is designed to supply the power for operation of the oscillator without battery. The experimental results show that a batteryless self-start circuit successfully operates the oscillator with mini-PEH, and self-starting time is 0.45 s. Second, this paper proposes an adjustable UVLO converter that can supply the power even if a power consumption of a wireless sensor node is higher than generated power from PEH. The experimental result shows the adjustable UVLO converter supplies 45 mW for 0.12 s after charging the output power of an impedance matching circuit (1.7 mW) for 10 s. This paper shows that the proposed circuit successfully overcomes challenging issues — self-start and lower power generation — for powering WSN.

Piezoelectric Energy Harvesting Improvement with Complex Conjugate Impedance Matching

2008 ◽  
Vol 20 (5) ◽  
pp. 597-608 ◽  
Author(s):  
J. Brufau-Penella ◽  
M. Puig-Vidal
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Transducer ◽  
Impedance Matching ◽  
Resonant Mode ◽  
Electrical Circuit ◽  
Impedance Match ◽  
Complex Conjugate ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy ◽  
Harvesting Systems

One way to enhance the efficiency of energy harvesting systems is complex conjugate impedance matching of its electrical impedance. In Piezoelectric energy Harvesting systems the match is done to increment the energy flows from a vibration energy source to an energy storage electrical circuit. In this article, we compare the power generated using the modulus impedance matching with the power generated using the complex conjugate impedance matching. We present the power ratio between both types of matching methods. The novelty of this article consists of a piezoelectric transducer completely adapted with a complex conjugate impedance match. The theory developed is validated on a commercial piezoelectric transducer QP40w from Midé Technology. The transducer model is first identified by means of a system identification step based on a novel two-port Lumped-Electromechanical Model. The QP40w is complex conjugate matched at its fourth resonant mode increasing the generated power by up to 20% more compared with the modulus match.

scholarly journals Piezoelectric Energy Harvesting from Suspension Structures with Piezoelectric Layers

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3755 ◽  
Author(s):  
Min Wang ◽  
Yiming Xia ◽  
Huayan Pu ◽  
Yi Sun ◽  
Jiheng Ding ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Impedance Matching ◽  
Low Frequency ◽  
Single Layer ◽  
Leaf Spring ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy ◽  
Low Frequency Vibration ◽  
Piezoelectric Layers ◽  
Series Of Experiments

In this paper, we propose a generator for piezoelectric energy harvesting from suspension structures. This device consists of a leaf spring and eight pairs of piezoelectric layers attached to inner and outer surfaces. We present a special type of leaf spring, which can magnify the force from the workload to allow the piezoelectric layers to achieve larger deformation. The generator is to solve the problem of vibration energy reutilization in a low-frequency vibration system. To verify the efficiency of the proposed configuration, a series of experiments are operated. The results indicate that the resonance frequency (25.2 Hz) obtained from the sweep experiment is close to the simulation result (26.1 Hz). Impedance-matching experiments show that the sum of the output power attains 1.7 mW, and the maximum single layer reaches 0.6 mW with an impedance matching of 610 KΩ, and the instantaneous peak-peak power density is 3.82 mW/cm3. The capacitor-charging performance of the generator is also excellent under the series condition. For a 4.7 μF capacitor, the voltage is charged to 25 V in 30 s and limited at 32 V in 80 s. These results demonstrate the exploitable potential of piezoelectric energy harvesting from suspension structures.

Active Piezoelectric Energy Harvesting: General Principle and Experimental Demonstration

2008 ◽  
Vol 20 (5) ◽  
pp. 575-585 ◽  
Author(s):  
Yiming Liu ◽  
Geng Tian ◽  
Yong Wang ◽  
Junhong Lin ◽  
Qiming Zhang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Boundary Conditions ◽  
Energy Conversion ◽  
Mechanical Energy ◽  
Impedance Matching ◽  
Energy Conversion Efficiency ◽  
Limiting Factors ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Device ◽  
Piezoelectric Energy

In piezoelectric energy harvesting systems, the energy harvesting circuit is the interface between a piezoelectric device and an electrical load. A conventional view of this interface is based on impedance matching concepts. In fact, an energy harvesting circuit can also apply electrical boundary conditions, such as voltage and charge, to the piezoelectric device for each energy conversion cycle. An optimized electrical boundary condition can therefore increase the mechanical energy flow into the device and the energy conversion efficiency of the device. We present a study of active energy harvesting, a type of energy harvesting approach which uses switch-mode power electronics to control the voltage and/or charge on a piezoelectric device relative to the mechanical input for optimized energy conversion. Under quasi-static assumptions, a model based on the electromechanical boundary conditions is established. Some practical limiting factors of active energy harvesting, due to device limitations and the efficiency of the power electronic circuitry, are discussed. In the experimental part of the article, active energy harvesting is demonstrated with a multilayer PVDF polymer device. In these experiments, the active energy harvesting approach increased the harvested energy by a factor of five for the same mechanical displacement compared to an optimized diode rectifier-based circuit.

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