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相关概念视频

Characteristics of MOSFET01:17

Characteristics of MOSFET

494
Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
494
MOSFET01:16

MOSFET

578
The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
578
Biasing of FET01:22

Biasing of FET

368
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
368
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

478
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
478
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

332
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...
332
Small-Signal Analysis of MOSFET Amplifiers01:23

Small-Signal Analysis of MOSFET Amplifiers

735
In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
735

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相关实验视频

Updated: Sep 11, 2025

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

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一种基于多变量线性回归的结点温度预测方法,使用SiC MOSFETs当前下降特征.

Haihong Qin1, Yang Zhang1, Yu Zeng2

  • 1College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.

Sensors (Basel, Switzerland)
|August 14, 2025
PubMed
概括

准确估计碳化物 (SiC) MOSFET连接温度 (Tj) 是至关重要的. 本研究引入了一种使用关闭电流下降时间和下降损失的新方法,用于精确监测功率电子中的Tj.

关键词:
状态监控 状态监控 状态监控目前下降的能量损失下降的能量损失.当前下降时间 当前下降时间交叉点温度 交叉点温度温度敏感的电气参数 (TSEP)

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相关实验视频

Last Updated: Sep 11, 2025

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科学领域:

  • 电力电子 电力电子 电力电子
  • 半导体设备 半导体设备
  • 热管理 热管理

背景情况:

  • 连接温度 (Tj) 对化碳 (SiC) MOSFETs至关重要,影响性能和可靠性.
  • 使用单个温度敏感电参数 (TSEP) 的传统方法由于温度敏感度有限,难以准确.
  • 准确的Tj估计对于电力电子系统的状态监测和可靠性至关重要.

研究的目的:

  • 开发一种准确和实用的方法来估计SiC MOSFET连接温度 (Tj).
  • 利用互补的TSEP,特别是关机电流下降时间 (t_fi) 和下降损失 (E_fi),以改进Tj预测.
  • 为了实现先进的状态监测和智能传感功率电子.

主要方法:

  • 证明了使用当前跌落时间和跌落能量损失作为TSEP的可行性.
  • 开发了一种使用多变量线性回归 (MLR) 的合交叉点温度预测模型.
  • 用人t_fi和E_fi作为Tj估计的MLR模型中的输入变量.

主要成果:

  • 实验验证证证实了拟议的MLR方法的高预测准确性.
  • 这种方法有效地利用了SiC MOSFETs当前下降阶段的特征.
  • 与传统的单一TSEP方法相比,已经证明了其优越性.

结论:

  • 提出的基于MLR的方法提供了准确的SiC MOSFET连接温度 (Tj) 估计.
  • 该技术增强了电力电子系统的状态监测和可靠性评估.
  • 为功率电子中的智能传感应用提供了巨大的潜力.