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22 March 2021 System-level finite element simulation of piezoelectric energy harvesters with rectified interface circuits
Yabin Liao, Feng Qian, Lei Zuo
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Proceedings Volume 11588, Active and Passive Smart Structures and Integrated Systems XV; 115880J (2021) https://doi.org/10.1117/12.2585285
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only
Abstract
Based on the equivalent impedance analysis, a method is proposed to realize a coupled-field simulation study of piezoelectric energy harvesters of rectified interface circuits through an equivalent linear circuit. The method opens up opportunities for finite element packages to analyze, design, and optimize energy harvesters at a system level, either adding the capability of simulating rectified circuit interfaces, or reducing a nonlinear circuit interface simulation into a faster and more stable linear simulation that can be solved more conveniently. The nonlinear rectified circuit is replaced with an equivalent external linear circuit of two passive electrical elements in series. The types and values of the passive elements are explicitly determined for the standard AC-DC (SEH) and synchronized switch harvesting on inductor (SSHI) circuit interfaces. For validation, this equivalent linear circuit is applied to a bimorph beam harvester in ANSYS, and a system-level analytical approach is introduced which integrates two established analytical approaches. The agreement between the ANSYS results and those of the integrated analytical approach validates this equivalent linear circuit method and the integrated analytical approach.
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Yabin Liao, Feng Qian, and Lei Zuo "System-level finite element simulation of piezoelectric energy harvesters with rectified interface circuits", Proc. SPIE 11588, Active and Passive Smart Structures and Integrated Systems XV, 115880J (22 March 2021); https://doi.org/10.1117/12.2585285
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KEYWORDS
Device simulation
Complex systems
Electrical elements
Passive elements
Switches
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