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Indexed by:期刊论文

Date of Publication:2022-06-30

Journal:电子学报

Affiliation of Author(s):电子信息与电气工程学部

Issue:5

Page Number:883-889

ISSN No.:0372-2112

Abstract:In order to solve the problem of low output power of piezoelectric energy harvesting systems caused by less energy and wide band of ambient vibration ,the method of optimizing the output power of cantilever piezoelectric energy harvesting system with the parallel or series inductance are explored and the influence of different parallel or series inductance to the output power is analyzed .Since the frequency of piezoelectric cantilever is low ,and the matching inductor value is large ,lossless simulated inductor is used in experiment .The theoretical analysis and experiment results show that the maximum output power of resonance can also be obtained at the deviating points with different matching inductance corresponding to different excitation frequencies ,which broadens the operating frequency band and improves the total energy harvesting energy level of the system .When the excitation frequency is 0.8 or 1.2 times of the resonant frequency ,the maximum output power with parallel or series inductance is 26.4 and 18.2 times of that of the purely resistive load .

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