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Maximum Power Transfer01:16

Maximum Power Transfer

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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
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High-performance hybrid nanogenerator for self-powered wireless multi-sensing microsystems.

Dan-Liang Wen1, Peng Huang1, Hai-Tao Deng1

  • 1School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731 China.

Microsystems & Nanoengineering
|July 24, 2023
PubMed
Summary

Researchers developed a hybrid nanogenerator (TEHNG) to harvest mechanical energy for a self-powered Internet of Things (IoT) system. This sustainable power solution enables continuous wireless sensing and data transmission for distributed IoT devices.

Keywords:
Electrical and electronic engineeringElectronic devices

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Area of Science:

  • Materials Science and Engineering
  • Energy Harvesting Technologies
  • Internet of Things (IoT) Systems

Background:

  • Wireless sensor network nodes are essential components in wearable devices, consumer electronics, and industrial applications, forming the backbone of the Internet of Things (IoT).
  • There is a growing demand for sustainable and pollution-free power sources for unattended, distributed IoT systems, driving research into advanced power technologies.

Purpose of the Study:

  • To develop a high-performance triboelectric-electromagnetic hybrid nanogenerator (TEHNG) for reliable, unattended power supply in distributed IoT systems.
  • To integrate the TEHNG with power management, energy storage, signal processing, and a microcontroller to create a self-powered integrated microsystem.

Main Methods:

  • Development of a triboelectric-electromagnetic hybrid nanogenerator (TEHNG) incorporating material optimization, configuration optimization, and pyramid microstructure design.
  • Integration of power management, energy storage, sensing signal processing modules, and a microcontroller unit with the TEHNG.
  • Construction of an all-in-one wireless multisensing microsystem including the TEHNG, integrated circuitry, and temperature, pressure, and ultraviolet sensors.

Main Results:

  • The developed TEHNG achieved a high load power output of 21.8 mW through optimized design and material implementation.
  • The integrated microsystem demonstrated continuous, self-powered operation using the TEHNG as the sole power source.
  • The system successfully performed real-time sensing of environmental variables and wireless data transmission to a terminal.

Conclusions:

  • The high-performance TEHNG provides a sustainable and reliable power solution for self-powered IoT devices.
  • The integrated wireless multisensing microsystem showcases significant potential for diverse applications within the Internet of Things field.
  • This work advances the development of self-sufficient microsystems, reducing reliance on conventional power sources for IoT deployments.