Effects of coupling in piezoelectric multi-beam structure

Anand, Ashutosh; Naval, Sourav; Sinha, Prasun; Das, Nikhil Kumar; Kundu, Sudip

doi:10.1007/s00542-019-04653-3

Cited by 16 publications

(18 citation statements)

References 29 publications

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“…Therefore, the SSHI circuit is tested for the variation in the C p values. The variation in the magnitude of input vibration gets reflected in the form of amplitude variation in the current i p [24]. The circuit is tested for the 50% variation in the magnitude of i p keeping f p constant.…”

Section: Circuit Robustnessmentioning

confidence: 99%

Robust vibration invariant SSHI rectifier circuit for piezoelectric device

Singh

Pal

Kundu

2021

Analog Integr Circ Sig Process

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Rectifier is the most critical block of the power conditioning circuit designed for the Piezoelectric Energy Harvester (PZEH). Maintaining high rectification efficiency under the variable ambient conditions is the major design challenge. This paper presents a novel topology of self tuned Synchronized Switch Harvesting on Inductor (SSHI) based rectifier circuit for PZEH which provides high power extraction efficiency over a wide range of frequency and magnitude of input vibrations available. The high rectification efficiency is maintained for different PZ devices also. The synchronization of SSHI block under different ambient conditions is achieved by an adaptively controlled pulse generator circuit which uses internal voltage sensing. An active diode circuit to reduce the conduction loss in SSHI block and forward voltage drop of rectifier is used. The proposed circuit is working from 100 to 350 Hz with flipping efficiency above 90% and power extraction efficiency around 50%. A maximum power conversion efficiency of 58 % and maximum flipping efficiency of 93.6% is obtained with a figure of merit of 467% and output power of 72:6 lW.

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Section: Circuit Robustnessmentioning

confidence: 99%

Robust vibration invariant SSHI rectifier circuit for piezoelectric device

Singh

Pal

Kundu

2021

Analog Integr Circ Sig Process

Self Cite

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“…When the PZ cantilever operates in 31 modes, stress generates in the lateral direction (X direction or 3 direction) and an electric field in the transverse direction (Z direction or 1 direction). So, equations (1a) and (1b) show the PZ property and inverse PZ property [5,6].…”

Section: Electrical Analysis Of Piezoelectric Cantilevermentioning

confidence: 99%

“…When the rectangular cantilever structure vibrates vertically, stress acts in the x, y and xy plane. So, the applied stress, strain and electric field in the PZ layer are related as in equations (3) (a, b, c) [5,6].…”

Section: Electrical Analysis Of Piezoelectric Cantilevermentioning

confidence: 99%

“…The vibration energy harvester (EH) converts vibration energy into useable electric energy. Vibration energy can be converted into electrical energy using electrostatic [1,2], electromagnetic [3,4] and piezoelectric (PZ) mechanisms [5][6][7][8][9][10][11][12][13]. The piezoelectric transducer is the most favoured, as it has high energy density, easy integration in CMOS technology, high durability, and it does not need any external voltage source [10].…”

Section: Introductionmentioning

confidence: 99%

“…The piezoelectric transducer is the most favoured, as it has high energy density, easy integration in CMOS technology, high durability, and it does not need any external voltage source [10]. There are many EH designs such as cantilever [5,6], clamped-clamped beams [13], diaphragms [13], cymbal type structure [13], shell and stack type structures [13]. The cantilever structure is the most used as it has higher average strain energy.…”

Section: Introductionmentioning

confidence: 99%

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Bulletin of the Polish Academy of Sciences: Technical Sciences

Anand,

Pal,

Kundu

2021

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In this paper, the performance and frequency bandwidth of the piezoelectric energy harvester (PZEH) is improved by introducing two permanent magnets attached to the proof mass of a dual beam structure. Both magnets are in the vicinity of each other and attached in such a way to proof mass of a dual beam so that they create a magnetic field around each other. The generated magnetic field develops a repulsive force between the magnets, which improves electrical output and enhances the bandwidth of the harvester. The simple rectangular cantilever structure with and without magnetic tip mass has a frequency bandwidth of 4 Hz and 4.5 Hz, respectively. The proposed structure generates a peak voltage of 20 V at a frequency of 114.51 Hz at an excitation acceleration of 1 g (g= 9.8 m/s 2 ). The peak output power of a proposed structure is 25.5 µW. The operational frequency range of a proposed dual beam cantilever with a magnetic tip mass of 30 mT is from 102.51 Hz to 120.51 Hz, i.e., 18 Hz. The operational frequency range of a dual beam cantilever without magnetic tip mass is from 104.18 Hz to 118.18 Hz, i.e., 14 Hz. There is an improvement of 22.22% in the frequency bandwidth of the proposed dual beam cantilever with a magnetic tip mass of 30 mT than the dual beam without magnetic tip mass.

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