Multiple piezo-patch energy harvesters on a thin plate with respective AC-DC conversion

Amirreza Aghakhani; Ipek Basdogan

doi:10.1117/12.2296831

15 March 2018 Multiple piezo-patch energy harvesters on a thin plate with respective AC-DC conversion

Amirreza Aghakhani, Ipek Basdogan

Proceedings Volume 10595, Active and Passive Smart Structures and Integrated Systems XII; 105951B (2018) https://doi.org/10.1117/12.2296831
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States

Abstract

Piezoelectric patch energy harvesters can be directly integrated to plate-like structures which are widely used in automotive, marine and aerospace applications, to convert vibrational energy to electrical energy. This paper presents two different AC-DC conversion techniques for multiple patch harvesters, namely single rectifier and respective rectifiers. The first case considers all the piezo-patches are connected in parallel to a single rectifier, whereas in the second case, each harvester is respectively rectified and then connected in parallel to a smoothing capacitor and a resistive load. The latter configuration of AC-DC conversion helps to avoid the electrical charge cancellation which is a problem with the multiple harvesters attached to different locations of the host plate surface. Equivalent circuit model of the multiple piezo-patch harvesters is developed in the SPICE software to simulate the electrical response. The system parameters are obtained from the modal analysis solution of the plate. Simulations of the voltage frequency response functions (FRFs) for the standard AC input – AC output case are conducted and validated by experimental data. Finally, for the AC input – DC output case, numerical simulation and experimental results of the power outputs of multiple piezo-patch harvesters with multiple AC-DC converters are obtained for a wide range of resistive loads and compared with the same array of harvesters connected to a single AC-DC converter.

Citation Download Citation

Amirreza Aghakhani and Ipek Basdogan "Multiple piezo-patch energy harvesters on a thin plate with respective AC-DC conversion", Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 105951B (15 March 2018); https://doi.org/10.1117/12.2296831

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