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相关概念视频

Faraday Disk Dynamo01:23

Faraday Disk Dynamo

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A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
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Van de Graaff Generator01:15

Van de Graaff Generator

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Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...
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DC Battery01:21

DC Battery

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A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
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DC Generator01:19

DC Generator

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An alternator converts mechanical energy into electrical energy that varies sinusoidally, resulting in AC current. Meanwhile, a DC generator converts mechanical energy into electrical energy, which are DC pulses with the same polarity. The construction of a DC generator is similar to that of an alternator, except that the pair of slip rings is replaced by a single split ring, also called a commutator. The commutator functions like a periodic rotary switch; it changes the contacts with the...
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P-N junction01:11

P-N junction

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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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Electromotive Force01:02

Electromotive Force

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Electromotive force (emf) is the force that causes current to flow from a higher to a lower  potential. The term "electromotive force" is used for historical reasons, even though emf is not a force at all.
Any circuit with a constant current must contain an emf-producing source. Examples of emf sources include batteries, electric generators, solar cells, thermocouples, and fuel cells. All these sources transform energy of some kind (mechanical, chemical, thermal, and so on)...
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利用动态静电场用二极管电池产生能量.

Renyun Zhang1, Magnus Hummelgård1, Ye Xu2

  • 1Department of Engineering, Mathematics, and Science Education, Mid Sweden University, Sundsvall, SE 85170, Sweden.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|May 14, 2025
PubMed
概括

这项研究引入了用于机械能量采集的静止二极管电池 (DiC),绕过了运动对齐问题. 这些设备通过静电感应产生直流电源,为供电电子设备和传感器提供了多功能解决方案.

关键词:
二极管细胞是二极管细胞.静电场是一种静电场.能源采集 能源采集植入了植入的传感器.

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科学领域:

  • 节能采集 节能采集 节能采集
  • 材料科学是一种材料科学.
  • 电气工程 电气工程 电气工程

背景情况:

  • 机械能量采集对于供电小型电子设备和传感器至关重要.
  • 现有的方法,如 triboelectric 纳米发电机,在运动向量对齐方面存在局限性.
  • 需要一种新的方法来实现高效和多用途的机械能量采集.

研究的目的:

  • 提出一种使用静止二极管电池 (DiCes) 来从机械运动中产生电力的新方法.
  • 通过电静电感应在 DiCes.中证明了通过电静电感应发电的理论和实验验证.
  • 展示DiCes在各种应用中的潜力,包括无线电力传输和基础设施能源采集.

主要方法:

  • 使用多个二极管的静止二极管细胞 (DiCes) 的开发.
  • 理论建模和实验验证对二极管连接处的静电感应.
  • 描述DC电压,电流和功率密度输出的Dices.

主要成果:

  • 通过静电感应,DIC通过动态变化的静电场产生电力.
  • 有360个二极管的0.02m2 DiCe产生了最大490V的直流电压和1.08mA的电流.
  • 实现了 26.5 W·m-2 的直流功率密度.

结论:

  • DiCs为机械能量采集提供了一个有希望的替代方案,克服了现有技术的局限性.
  • 该技术在接触式和非接触式模式中运行,提高了其适用性.
  • 潜在的应用包括为植入的医疗设备提供动力,以及从车辆和道路中收集能量.