Enhancing the Output Power of a Piezoelectric Energy Harvester by Reducing the Effect of the Internal Capacitance Using Inductance

Zargarani, Anahita; Mahmoodi, S. Nima

doi:10.1115/smasis2016-9288

Cited by 1 publication

(4 citation statements)

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“…Using inductance to improve the energy harvesting circuit has been preliminarily investigated in both theory and experiment (Zargarani & Mahmoodi, 2016;Zargarani & Mahmoodi, 2017). This paper builds upon the preliminary results of (Zargarani & Mahmoodi, 2016;Zargarani & Mahmoodi, 2017) and completes the theory and experimentation. The inductance is utilized to produce a positive reactance to reduce this negative reactance, and therefore increases the output power of the piezoelectric energy harvester.…”

Section: Introductionmentioning

confidence: 83%

“…(4) Figure 1. SRL circuit including the piezoelectric model (Zargarani & Mahmoodi, 2016) An easier method for obtaining the optimal value of the load resistance is applying maximum power transfer theorem. Based on this theorem, output power of an electrical interface is maximum when the load impedance is equal to the complex conjugate of the source impedance at the frequency of excitation.…”

Section: Dynamic Modeling Of the Energy Harvesting Circuitsmentioning

confidence: 99%

“…Figure 2. IL circuit schematic (Zargarani & Mahmoodi, 2016) The optimal load resistance is obtained using equation ( 5). Substituting for source and load impedances using equations ( 6) and ( 7) yields to:…”

Section: Dynamic Modeling Of the Energy Harvesting Circuitsmentioning

confidence: 99%

“…The Inductive AC-DC circuit is then investigated experimentally to see the effect of adopting the inductive element on the output power. The standard AC-DC circuit is shown in Figure 3, and the Inductive AC-DC circuit is shown in (Zargarani & Mahmoodi, 2016) Figure 4. Inductive AC-DC circuit schematic (Zargarani & Mahmoodi, 2016;Zargarani & Mahmoodi, 2017) The voltage drop across a diode, , is assumed to be zero, as diodes are considered to be ideal.…”

Section: Dynamic Modeling Of the Energy Harvesting Circuitsmentioning

confidence: 99%

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

Zargarani

Mahmoodi

2018

IJAS

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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.

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