Evaluation of energy harvesting conditioning circuits (original) (raw)

Piezoelectric Energy Harvester Design and Power Conditioning

Energy harvesting is fascinating area of research now when the whole world is looking for green energy as an alternative source. This paper describes the design of energy harvester prototype and the power conditioning circuit. The optimization of extracted power out of the piezoelectric tile has been presented. The generation of electric energy when some load is applied on the sensors either in the form of direct strain or ambient vibration depends upon various factors such as number of piezoelectric transducers, electromechanical coupling coefficient of the piezoelectric sensors, amount of load applied, and also on the scheme of arrangement. Energy harvester floor tile has been designed with very inferior quality piezoelectric diaphragms which are used in buzzers. An efficient way has been presented to capture the generated energy via dedicated IC and boost it by a converter to get regulated output for charging the batteries of smart phones. The complete charge cycle has been studied for the developed system. The simulation and experimental studies have been successfully carried out. The model design and testing was purely for studying the energy generation and capturing phenomenon in an efficient manner. It can be implemented to generate large power by suitably considering the several factors mentioned above and implementing it on the large scale.

Circuit Optimization for Enhancing the Output Power of a Piezoelectric Energy Harvester

International Journal of Applied Science, 2018

In this paper, a new method is proposed for improving a piezoelectric energy harvester’s output power. A piezoelectric vibration energy harvester has an inherent internal capacitance. The new approach adopts inductance to reduce the reactance of the internal capacitance and enhance the output power. To show the practicality of this method, four electrical circuits are investigated numerically and experimentally for a piezoelectric beam energy harvester: Simple Resistive Load, Inductive Load, standard AC-DC, and Inductive AC-DC circuits. An Inductive Load circuit is built by adding an inductor to a Simple Resistive Load circuit, while an Inductive AC-DC circuit is built by adding an inductor to a standard AC-DC circuit. Experimental results indicate that the Inductive Load and the Inductive AC-DC circuits avail the Simple Resistive Load and standard AC-DC circuits respectively. The inductive AC-DC circuit shows a 6.7% increase in the output power compared to the standard AC-DC circuit.

Study of Self-Powered Electronic Circuits for Piezoelectric Energy Harvesting 1

2016

The Recently, there has been growing interest in power conditioning interface circuits used to enhance energy harvesting using piezoelectric devices. Among there interface circuits, the Synchronised Switch Harvesting on Inductor Interfaces (SSHI) and Synchronous Electric Charge Extraction (SECE) are the most promising. In this paper we the results of design and performance characterisation of self-powered SSHI and SECE interface circuits. The self-powered SSHI interface demonstrated a record enhancement of close to 300 % while the self-powered SECE interface shoed an enhancement of 70 % more power relative to the standard energy harvesting (SEH)

Development of multiple-input power management circuit for piezoelectric harvester

Journal of Mechanical Engineering, 2017

This paper discusses the multisource input from the piezoelectric (PZT) generators to the power management circuit (PMC) of the energy harvesting system. It discusses the structure of the PMC starting from the AC-DC full bridge rectifier circuit and the structure of the storage circuit of the power management circuit itself. The AC-DC rectifier circuit was compared with separated AC-DC rectifier, series and parallel connection to choose the best performance output and structure. The storage circuit was also compared between traditional method and switch circuit. This paper also describes the designing circuit of the PMC from the software and fabricating it to PCB board circuit. The PMC was tested by connecting 4 input PZT generators which were harvested from the vibration and connected to the application electronic load circuit such as microcontroller and sensors to complete it as an energy harvesting vibration based system. The performance test was conducted by testing it in a labo...

Power Processing Circuits for Piezoelectric Vibration-Based Energy Harvesters

IEEE Transactions on Industrial Electronics, 2010

The behavior of a piezoelectric vibration-driven energy harvester with different power processing circuits is evaluated. Two load types are considered: a resistive load and an ac-dc rectifier load. An optimal resistive and optimal dc-voltage load for the harvester is analytically calculated. The difference between the optimal output power flow from the harvester to both load circuits depends on the coupling coefficient of the harvester. Two power processing circuits are designed and built, the first emulating a resistive input impedance and the second with a constant input voltage. It is shown that, in order to design an optimal harvesting system, the combination of both the ability of the circuit to harvest the optimal harvester power and the processing circuit efficiency needs to be considered and optimized. Simulations and experimental validation using a custom-made piezoelectric harvester show that the efficiency of the overall system is 64% with a buck converter as a power processing circuit, whereas an efficiency of only 40% is reached using a resistor-emulating approach.

Analysis of Discrete & Integrated Circuits for Piezoelectric Energy Harvesting

2013

This paper discusses two circuits for piezoelectric energy harvesting; one is integrated circuit which consists of LTC®3588-1; a complete piezoelectric energy harvesting power supply, other one is a discrete circuit. Former one is simulated with the LTSPICE; later one is simulated in Proteus, and both the circuits are practically built and tested in laboratory. Based on the comparative study of these circuits, we suggest the use of integrated circuit in harvesting the mechanical energy (pressure) produced in shock absorbers of bike which could serve as an ancillary source of energy for charging mobile phone battery.

Design of Piezoelectric Energy Harvester and Power Conditioning

International Journal of Scientific Research in Science, Engineering and Technology, 2020

The existing system presents a novel approach called simultaneous wireless strain sensing and energy harvesting from multiple piezo-patches, which is intended for self-powered Structural Health Monitoring applications. The Energy Harvesting subsystem is mainly the self-powered extended synchronous electric charge extraction interface based on double cross-coupled rectifying structure and a single fly back transformer, which is able to harvest energy from multiple piezo-patches. In this proposed work, the DC power is generated using piezoelectric and MEMS. Then the Produced by DC energy is given to Ultra Low Power Converter Using with Micro controller then Ultra capacitor used to Highly Discharging in the DC power bank. The outputs of transducers are also given to micro controller. The obtained energy is boosted up using Booster Ultra Low Power Converter. The output of the Ultralow Power Converter is given to the Relay for the switching unit to store energy in a DC Power Bank and the stored energy is inverted to AC voltage

A Novel Self-Power SSHI Circuit for Piezoelectric Energy Harvester

Piezoelectric energy harvester (PEH) has been used to feed loads in military, health, animal tracking, and many other applications. A considerable amount of energy is dissipated in PEH to flip the output voltage through the internal capacitor and resistor of piezoelectric (PZT) material. One of the most effective techniques to harvest this power loss is called a synchronized switch harvesting on inductor (SSHI) technique. A parallel SSHI technique has been used to flip the terminal voltage of the PEH through external inductor. A new, simple, and effective circuit has been introduced in this paper for this purpose. The new circuit uses two capacitors only to detect the flipping points of terminal voltage replacing two resistors, eight diodes, and two capacitors in the state of the art circuit (SAC). The new proposed circuit (NPC) showed about 26% reduction in losses, 18% increased output power, and 10% increase in efficiency compared to the SAC in normal operating condition. Also, the NPC showed 38% improvement in output power compared to the SAC in different operating conditions. Besides these benefits, the NPC extends the vibration frequency operating range 10 times higher than the circuit without the SSHI and 2.5 times the SAC. The simulation and experimental results showed the superiority of the NPC.

Experimental comparison of piezoelectric rectifying circuits for energy harvesting

Piezoelectric energy harvester transforms mechanical energy into electrical energy. However, the electrical output purely from the energy harvester needed to be conditioning before being use to power up small electronic devices. Output voltage in AC form will need to be rectified followed by stepping down using DC-DC converter to voltage level suit to any desired application. In this paper, an experimental was carried out to compare two different integrated circuit based rectifiers one of which is constructed using low voltage drop Schottky diodes, BAT754L and the other one is glass passivated single-phase bridge rectifier, W08G. It has been verified with experiment that Schottky diode outperformed normal diode type rectifying circuit.