An SECE array of piezoelectric energy harvesting

Abstract

The paper studies the electrical response of an array of piezoelectric oscillators attached to the synchronized electric charge extraction (SECE) interface circuit. The analytic estimate of output power is derived and presented through the matrix formulation of generalized Ohm’s law (charging on capacitance) for the case of parallel (series) connection of energy harvesters. These formulations mainly depend on the proposed equivalent load impedances which are independent of external resistive loads. It therefore offers an advantage of enabling harvested power independent of DC output voltage and making the harvester array desirable for broadband energy scavenging. The proposed framework is subsequently validated both numerically and experimentally. The results show that the power output and bandwidth of an SECE-based array are superior to that based on the standard energy harvesting circuit. Further, it is found that the behavior of an SECE array electrically arranged in parallel connection is different from that connected in series. The former demonstrates the output power higher than the latter, while the latter exhibits roughly uniform peak power in frequency response. However, the experiment indicates the unexpected power drop deviated significantly from the prediction in the array of harvesters connected in series. Such a discrepancy is explained as a result of comparatively serious leakage current in the reverse-biased diodes.

Piezoelectric-array-based MISO diagnostic system for CNN-condition monitoring of bearing/gearbox instruments

“…2(a). While this technique has been often applied to piezoelectric energy harvesting [34][35][36] and vibration damping, 37,38 the involvement of it with the clamped piezoelectric capacitance here is to form a band pass filter from resonant LC circuit. To determine the magnitude L of the inductance for optimizing the central frequency of the band pass filter, first note that the conservation of charge from the circuit loop shown in Fig.…”

An SSHC Interface Circuit for Energy Harvesting of Piezoelectric Flags

“…The interface circuit is one of the key components to gather electric energy. There are several commonly used circuits in piezoelectric energy harvesting, such as SEH, SECE (synchronous electric charge extraction), SSHI (synchronized switch-harvesting-on inductor), and SSHC [9][10][11][12]. SEH is a classic interface circuit for piezoelectric energy harvesting, and its diagram is shown in Figure 4.…”

Torque sensing and energy harvesting based on phase shift in two-point magnetic plucking

“…1 Indeed, advances in vibration-based piezoelectric energy harvesting have witnessed a dramatic rise from many aspects, including: (1) theoretical analysis of electromechanical response [2][3][4][5][6] and conversion efficiency for effective power normalization schemes; [7][8][9] (2) novel designs of harvester structures for broadband energy harvesting [10][11][12][13][14][15][16][17][18][19] and frequency up-conversion energy harvesters for low-frequency non-resonant excitations; [20][21][22][23][24][25] and (3) interface circuits for maximum power transfer to the load. [26][27][28][29][30][31][32][33][34][35] On the other hand, piezoelectric materials have been utilized as sensors in various applications, such as structural health monitoring. 36,37 The combination of energy harvesting and sensing has gained attention for the development of self-powered wireless sensor networks used in monitoring infrastructures and equipment.…”