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相关概念视频

Voltage Doubler Circuit01:23

Voltage Doubler Circuit

539
A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
539
P-N junction01:11

P-N junction

511
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...
511
Half wave rectifier01:20

Half wave rectifier

1.1K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
1.1K
Bridge rectifier01:24

Bridge rectifier

589
The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
589
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

239
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
239
Full wave rectifier01:22

Full wave rectifier

1.1K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
1.1K

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相关实验视频

Updated: Jun 23, 2025

X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells
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一个新的半正方形的buck-boost结构,用于光伏应用的连续输入电流.

Mustafa Okati1, Mahdiyeh Eslami2, Baseem Khan3,4

  • 1Department of Electrical Engineering, Zabol Branch, Islamic Azad University, Zabol, Iran. Mu.okati@gmail.com.

Scientific reports
|June 19, 2024
PubMed
概括

这项研究引入了一种适用于光伏太阳能应用的新型非隔离的半正方形buck/boost转换器. 该设计提供连续输入电流,降低电磁干扰 (EMI),以及在buck和boost模式中的高效率.

关键词:
这是一个Buck/Boost转换器.连续的输入/输出电流.一个半正方形.太阳能光伏系统 太阳能光伏系统稳定状态分析.

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科学领域:

  • 电气工程 电气工程
  • 电力电子 电力电子 电力电子
  • 可再生能源系统可再生能源系统

背景情况:

  • 光伏 (PV) 太阳能应用需要高效的直流-直流转换器,具有连续输入电流,以最大限度地减少波纹和电磁干扰 (EMI).
  • 现有的非隔离的buck/boost转换器设计往往会在组件应力和效率方面带来挑战.
  • 为了推进光伏能源转换,需要简化拓,改进性能特征,这对于推进光伏能源转换至关重要.

研究的目的:

  • 提出一种具有两个结构变化的新型非隔离的半正方形buck/boost转换器.
  • 通过连续输入电流和降低EMI,提高适用于光伏太阳能应用的适用性.
  • 分析和呈现性能,效率和组件应力优势相对于现有设计.

主要方法:

  • 设计和理论分析两个新的非隔离的半正方形buck/boost转换器拓.
  • 半正方形电压增益公式的数学推导:D(2-D) /(1-D) ^2.2.
  • 通过理想/非理想模式分析,小信号分析和PLECS模拟来评估性能.
  • 在Buck和Boost模式下实验验证效率.

主要成果:

  • 实现了高效率:94.6% (理论) 和91.8% (实验) 在增强模式 (72W输出).
  • 证明的效率:89.3% (理论) 和87.2% (实验) 在buck模式 (15W输出).
  • 拟议的拓具有连续输入电流,简化的结构,以及对半导体组件的压力降低的电压/电流.
  • 连续电流模式 (CCM) 被确定为最佳操作模式.

结论:

  • 新型非隔离的半正方形buck/boost转换器设计非常适合光伏太阳能应用,因为它具有连续输入电流和降低的EMI.
  • 与最近的设计相比,提出的拓在效率,组件应力和结构简单性方面具有显著的优势.
  • 通过理论分析,模拟和实验结果验证设计,确认其实际可行性.