20.6 Electromagnetic vibration energy harvester interface IC with conduction-angle-controlled maximum-power-point tracking and harvesting efficiencies of up to 90%

Leicht, Joachim; Amayreh, Mohammad; Moranz, Christian; Maurath, Dominic; Hehn, Thorsten; Marioli, Yiannos

doi:10.1109/isscc.2015.7063079

Cited by 20 publications

(12 citation statements)

References 5 publications

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“…In addition, because energy harvesting sources can be placed close to the device, transmission losses caused by long cables can also be eliminated. Because of these advantages, studies on numerous energy harvesting sources including Photovoltaic (PV) cells [1,[3][4][5][6][7][8][9][10][11][12][13], TEG [14], and methods of using vibration [15] or RF signals [16,17] have been discussed in the literature. Among these, PV cells is one of the most promising candidates that can be used in IoT systems due to its low cost and high-power density.…”

Section: Introductionmentioning

confidence: 99%

An Accurate Time-Based MPPT Circuit With Two-Period Tracking Algorithm and Convergence Range Averaging Technique for IoT Applications

et al. 2021

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This paper proposes a highly efficient Time-Based Maximum-Power-Point-Tracking (TB-MPPT) integrated-circuit. Conventional TB-MPPT circuit shows unstable status (oscillation) near the Maximum Power Point (MPP), which causes the degradation of the overall power tracking efficiency. To overcome this critical issue, the proposed circuit separates the tracking operation into two periods, and it utilizes convergence range averaging technique with an adaptive perturbation step according to each control signal to accurately extract the current power level without oscillation problem. This work is fabricated in 180 nm CMOS process to demonstrate advantages of the proposed scheme. With 0.47V 12mW Photovoltaic (PV) cell, the measurement results show 94.2% of MPPT efficiency and 91.6% of power conversion efficiency (PCE). It occupies silicon chip area of 1.69 mm 2 .

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Section: Introductionmentioning

confidence: 99%

An Accurate Time-Based MPPT Circuit With Two-Period Tracking Algorithm and Convergence Range Averaging Technique for IoT Applications

et al. 2021

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“…A full-bridge rectifier is commonly used, but passive diodes have high forward voltage drop and small conduction angle that resulted in high power consumption and decreased efficiency in extracting energy. Hence, a rectifier with active diodes is adopted to achieve higher efficiency [3,4,5,6,7,8,9,10]. The power transistor that is driven by a comparator or an op amp of the active diode has very low forward voltage drop.…”

Section: Introductionmentioning

confidence: 99%

A self-powered zero-quiescent-current active rectifier for piezoelectric energy harvesting

Jiang

2018

IEICE Electron. Express

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A self-powered zero-quiescent-current active rectifier for piezoelectric energy harvesting is proposed. It consists of two cross-biased PMOS transistors and two active diodes. To achieve zero quiescent-current, a biasfree clamping circuit is designed to clamp the drain-source voltage of the NMOS transistor of the active diode. Post-simulation and measurement results show that the proposed active rectifier achieves an efficiency improvement of more than 40% vs. the ordinary full-bridge rectifier; the power transferred by the rectifier from the piezoelectric energy harvester (PEH) to the storage capacitor is increased significantly, especially even when the output power of PEH is low.

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“…Various efforts in the last years aim for fully integrated autonomous microsystems [1,2,3]. While miniaturization of the system size is resulting in a reduction of power consumption, a reliable miniaturized fully integrated power supply is a common issue.…”

Section: Introductionmentioning

confidence: 99%

A Solar Cell Powered Adaptive Charging Circuit for CMOS Integrated Micro Fuel Cells

Moranz

Ylli

Manoli

2015

J. Phys.: Conf. Ser.

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Abstract. This paper presents an autonomous interface circuit which uses solar cells to automatically recharge chip integrated micro fuel cell accumulator arrays. These accumulators comprise a fuel cell for powering systems and a hydrolysis cell for charging the integrated hydrogen storage. The charging current is continuously monitored and the interface circuit automatically maximizes and controls the charging current. The solar cells powering the charging process are projected to be part of the chip package. The presented system, in combination with a previously developed voltage regulator and integrated sensors or actuators enables the implementation of fully integrated energy autonomous systems.

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20.6 Electromagnetic vibration energy harvester interface IC with conduction-angle-controlled maximum-power-point tracking and harvesting efficiencies of up to 90%

Cited by 20 publications

References 5 publications

An Accurate Time-Based MPPT Circuit With Two-Period Tracking Algorithm and Convergence Range Averaging Technique for IoT Applications

An Accurate Time-Based MPPT Circuit With Two-Period Tracking Algorithm and Convergence Range Averaging Technique for IoT Applications

A self-powered zero-quiescent-current active rectifier for piezoelectric energy harvesting

A Solar Cell Powered Adaptive Charging Circuit for CMOS Integrated Micro Fuel Cells

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