High-performance cycloid inspired wearable electromagnetic energy harvester for scavenging human motion energy

Maharjan, Pukar; Bhatta, Trilochan; Rasel, M. Salauddin; Salauddin, Md.; Rahman, M. Toyabur; Park, Jae Yeong

doi:10.1016/j.apenergy.2019.113987

Cited by 123 publications

(73 citation statements)

References 38 publications

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“…The design of sophisticated mechanical systems requires new energy conversion mechanisms for micro‐ and nanogenerators in the energy harvesting field. Some examples of energy conversion mechanisms are piezoelectric, electromagnetic, triboelectric, and electrostatic . Among these mechanisms, electromagnetic generators (EMG) are the most popular for high power generation capability in vibration energy harvesting .…”

Section: Introductionmentioning

confidence: 99%

“…Some examples of energy conversion mechanisms are piezoelectric, electromagnetic, triboelectric, and electrostatic. [28][29][30][31] Among these mechanisms, electromagnetic generators (EMG) are the most popular for high power generation capability in vibration energy harvesting. [32][33][34] Nowadays, triboelectric nanogenerators (TENGs) have become one of the most promising mechanisms for vibration energy harvesting because of their ability to generate electricity from irregular and extremely The fast growth of smart electronics requires novel solutions to power them sustainably.…”

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confidence: 99%

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Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics

Rahman

Rana

Salauddin

et al. 2020

Advanced Energy Materials

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The fast growth of smart electronics requires novel solutions to power them sustainably. Portable power sources capable of harvesting biomechanical energy are a promising modern approach to reduce battery dependency. Herein, a novel elastic impact‐based nonresonant hybridized generator (EINR‐HG) is reported to effectively harvest biomechanical energy from diverse human activities outdoors. Through the rational integration of a nonlinear electromagnetic generator with two contact‐mode triboelectric nanogenerators, the proposed EINR‐HG generates hybrid electrical output simultaneously under the same mechanical excitations. By introducing a flux‐concentrator with a nanowire‐nanofiber surface modification, significant improvement in the energy harvesting efficiency of the EINR‐HG is achieved. After optimizing using simulations and vibration tests, the as‐fabricated EINR‐HG delivers an outstanding normalized power density of 3.13 mW cm−3 g−2 across a matching resistance of 1.5 kΩ at 6 Hz under 1 g acceleration. Under human motion testing, the EINR‐HG generates an optimal output power of 131.4 mW with horizontal handshaking. With a customized power management circuit, the EINR‐HG serves as a universal power source that successfully drives commercial smart electronics, including smart bands and smartphones. This work shows the massive potential of biomechanical energy‐driven hybridized generators for powering personal electronics and portable healthcare monitoring devices.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics

Rahman

Rana

Salauddin

et al. 2020

Advanced Energy Materials

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“…In view of these issues, rotational energy harvesters have been explored to reduce the device volume. [ 96–98 ] With diminished size, it provides a potential means to embed the energy harvesters in the wearables, such as smart watches and wristbands. However, it remains to be a huge challenge to generate sufficient power for the smart watches and wristbands within strict volume requirement.…”

Section: Human Motion‐based Energy Harvesting Systemsmentioning

confidence: 99%

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

et al. 2020

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The development of wearable electronics and sensors is constrained by the limited capacity of their batteries. Therefore, energy harvesting from human motion is explored to provide a promising embedded sustainable power supply for wearable devices. Herein, the principles, development, and applications of human motion excited energy harvesters are reviewed. The energy harvesters are classified based on the human motions with distinguished characteristics: center of mass motion (COM), joint motion, foot strike, and limb swing motion. According to the motion characteristics, the principles, features, and limitations of different energy harvesters are discussed, and the power generation performances are compared. Finally, various self-powered applications enabled by embedded energy harvesters are introduced, so as to show the great potential of embedded energy harvesting systems in boosting the development of the wearables.

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“…Kinetic energy harvesting from human-or machine-induced vibration motion has been extensively studied. [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] Various energy scavenging techniques, such as piezoelectric, [24][25][26] electromagnetic, [27][28][29][30][31][32][33][34] triboelectric, [35][36][37] and hybrid techniques, [38][39][40][41][42][43][44] have been reported and are significantly progressing. The drawbacks of the reported harvesters are a low output power, limited degrees of freedom, and resonant behavior.…”

Section: Introductionmentioning

confidence: 99%

A Battery‐Less Arbitrary Motion Sensing System Using Magnetic Repulsion‐Based Self‐Powered Motion Sensors and Hybrid Nanogenerator

Bhatta

Maharjan

Salauddin

et al. 2020

Adv Funct Materials

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Self‐powered arbitrary motion sensors are in high demand in the field of autonomous controlled systems. In this work, a magnetic repulsion‐assisted self‐powered motion sensor is integrated with a hybrid nanogenerator (MRSMS–HNG) as a battery‐less arbitrary motion sensing system. The proposed device can efficiently detect the motion parameters of a moving object along any arbitrary direction and simultaneously convert low frequency (<5 Hz) vibrations into useful electricity. The MRSMS–HNG consists of a central magnet for the electromagnetic (EMG)–triboelectric (TENG) nanogenerator and four side magnets for motion sensors. Because all the magnets are aligned in the same magnetization direction, the repulsive force owing to the movement of the central magnet actuates the side magnets to achieve self‐powered arbitrary motion sensing. These self‐powered motion sensors exhibit a high sensitivity of 981.33 mV g−1 under linear motion excitation and have a tilting angle sensitivity of 9.83 mV deg−1. The proposed device can deliver peak powers of 27 mW and 56 µW from the EMG and TENG, respectively. By integrating the self‐powered motion sensors and hybrid nanogenerator on a single device, real‐time wireless transmission of motion sensor data to a smartphone is successfully demonstrated, thus realizing a battery‐less arbitrary motion‐sensing system for future autonomous control applications.

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High-performance cycloid inspired wearable electromagnetic energy harvester for scavenging human motion energy

Cited by 123 publications

References 38 publications

Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics

Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

A Battery‐Less Arbitrary Motion Sensing System Using Magnetic Repulsion‐Based Self‐Powered Motion Sensors and Hybrid Nanogenerator

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