A Highly Efficient P-SSHI Rectifier for Piezoelectric Energy Harvesting

Lu, Shaohua; Boussaid, Farid

doi:10.1109/tpel.2015.2422717

Cited by 109 publications

(80 citation statements)

References 13 publications

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“…Output load includes CL and RL. Figure 1 shows several reported techniques for improving the PCE [2]- [6]. The switch-only rectifier is introduced to reduce the power wasted during the negative cycle of VDR.…”

Section: Introductionmentioning

confidence: 99%

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Resonant Rectifier ICs for Piezoelectric Energy Harvesting Using Low-voltage Drop Diode Equivalents

Din

Chandrathna

Lee

2017

Preprint

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Herein, we present the design technique of a resonant rectifier for piezoelectric (PE) energy harvesting. We propose two diode equivalents to reduce the voltage drop in the rectifier operation, a minuscule-drop-diode equivalent (MDDE) and a low-drop-diode equivalent (LDDE). The diode equivalents are embedded in resonant rectifier integrated circuits (ICs), which use symmetric bias-flip to reduce the power wasted for charging and discharging the internal capacitance of a PE transducer. The self-startup function is supported by synchronously generating control pulses for the bias-flip from the PE transducer. Two resonant rectifier ICs, using both MDDE and LDDE, are fabricated in a 0.18 μm CMOS process and their performances are characterized under external and self-power conditions. Under the external-power condition, the rectifier using LDDE delivers an output power POUT of 564 μW and a rectifier output voltage VRECT of 3.36 V with a power conversion efficiency (PCE) of 90.1%. Under self-power conditions, the rectifier using MDDE delivers a POUT of 288 μW and a VRECT of 2.4 V with a corresponding PCE of 74.6%. The result shows that the power extraction capability of the proposed rectifier is 5.9 and 3.0 times higher than that of a conventional full-bridge rectifier.

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Section: Introductionmentioning

confidence: 99%

“…However, we note that there exists power loss from the voltage drop of the two switches. To reduce the voltage drop, current paths for positive and negative cycles are split [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

Resonant Rectifier ICs for Piezoelectric Energy Harvesting Using Low-voltage Drop Diode Equivalents

Din

Chandrathna

Lee

2017

Preprint

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“…In order to overcome these drawbacks, synchronized switch harvesting on inductor (SSHI) circuits have been studied and proved to increase the harvested power by several times than that of a SEH circuit under the same inputs, including parallel SSHI (P-SSHI) and series SSHI (S-SSHI) circuits [9,10]. Subsequently, SSHI circuits have been improved in many ways [11][12][13][14]. Up to now, several classes of switching strategies have been proposed, such as switching driven by external logic circuits [15], mechanical switching [16] and switching through velocity control [17].…”

Section: Introductionmentioning

confidence: 99%

A high-efficiency, self-powered nonlinear interface circuit for bi-stable rotating piezoelectric vibration energy harvesting with nonlinear magnetic force

Cheng

Chen

Xiong

et al. 2016

International Journal of Applied Electromagnetics and Mechanics

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Abstract. Parallel synchronized switch harvesting on inductor (P-SSHI) circuits have been proved to enhance piezoelectric vibration energy harvesting (PVEH), but the maximum conversion efficiency is obtained only when the voltage across the storage capacitor (VSC) equates to the optimal value. For bi-stable rotating PVEH with nonlinear magnetic force in engineering applications, however, the VSC will change greatly when powering real electric loads, thus it is impossible to maintain high conversion efficiency. In order to solve this problem, this paper presents an improved P-SSHI circuit with controllable optimal voltage (COV-PSSHI) by using a voltage control strategy between the storage capacitor and the electric load. The innovation is to control and maintain the VSC close to the optimal value. Firstly, the COV-PSSHI circuit is proposed and its theoretic model is built in detail. Then its average harvested power (AHP) is theoretically derived and AHP of the COV-PSSHI circuit is proved to be more than that of a classical P-SSHI circuit. In the end, experiments are performed to validate the performance of the COV-PSSHI circuit. It can be seen that the COV-PSSHI circuit can increase the AHP by factor 1.25 compared with classical P-SSHI circuits, which is enough to intermittently power the wireless sensor node. Also power consumption of the voltage control circuit has few effects on the COV-PSSHI circuit. In particular, it needs to optimize the envelop capacitor, the parallel inductor and two threshold voltages of the voltage controller in order to implement the COV-PSSHI circuit well in practice.

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“…In Fig. 1, the techniques in [3,4] used two continuous-time comparators to detect ON/OFF state of the diodes D3 and D4. Once one of the diodes transitions from ON to OFF, which indicates an asymptotical zero-crossing point (ZCP) of the current i P , the circuit closes the switch SW and then starts the SSHI process.…”

Section: Introductionmentioning

confidence: 99%

“…The variations of rectifier with a parallel SSHI circuit utilized an active diode rather than a continuous-time comparator, and thereby further saving the power [5,6,7,8,9]. However, the circuits in [3,4,5,6,7,8,9] would be problematic when a PE generator's output voltage is much lower than the rectifier's output voltage V RECT . This often occurs in the ambient environment where the PE generator is excited at weak or rapidly changing excitations.…”

Section: Introductionmentioning

confidence: 99%

A parallel-SSHI rectifier for ultra-low-voltage piezoelectric vibration energy harvesting

Kuang

You

et al. 2016

IEICE Electron. Express

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An idling scheme of Synchronous Switch Harvesting on Inductor (SSHI) is proposed for piling up output voltage of the piezoelectric energy (PE) harvester cycle by cycle, to deal with the PE harvester's low output voltage. The proposed rectifier integrates active diodes and a parallel-SSHI technique with a simple control scheme, and therefore has a high efficiency. The simulation results demonstrate the feasibility of proposed rectifier, which is able to extract energy from a ultra-low-voltage PE harvester.

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A Highly Efficient P-SSHI Rectifier for Piezoelectric Energy Harvesting

Cited by 109 publications

References 13 publications

Resonant Rectifier ICs for Piezoelectric Energy Harvesting Using Low-voltage Drop Diode Equivalents

Resonant Rectifier ICs for Piezoelectric Energy Harvesting Using Low-voltage Drop Diode Equivalents

A high-efficiency, self-powered nonlinear interface circuit for bi-stable rotating piezoelectric vibration energy harvesting with nonlinear magnetic force

A parallel-SSHI rectifier for ultra-low-voltage piezoelectric vibration energy harvesting

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