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相关概念视频

Characteristics of MOSFET01:17

Characteristics of MOSFET

508
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...
508
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

492
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...
492
MOSFET01:16

MOSFET

591
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...
591
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

483
Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
483
Small-Signal Analysis of MOSFET Amplifiers01:23

Small-Signal Analysis of MOSFET Amplifiers

746
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...
746
Small-signal Diode Model01:18

Small-signal Diode Model

1.1K
In analyzing the behavior of diodes in circuits, the relationship between the current through a diode and the voltage across it is of particular interest, especially when considering the effect of a direct current (DC) bias voltage. When applied, this DC bias influences the diode's operating point, known as the Q point, around which the current-voltage (I-V) characteristic of the diode exhibits exponential behavior. Introducing a small, time-varying signal on top of this bias aids in...
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相关实验视频

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Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
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基于数据表参数的SiC MOSFET的切换损失模型,使虚拟连接点温度估计成为可能.

Claudio Bianchini1, Mattia Vogni1, Alessandro Chini1

  • 1Department of Engineering Enzo Ferrari, University of Modena and Reggio-Emilia, 41125 Modena, Italy.

Sensors (Basel, Switzerland)
|June 27, 2025
PubMed
概括
此摘要是机器生成的。

用于碳化 (SiC) MOSFETs的新型虚拟传感器使用数值分析模型 (NAM) 和随时可用的电气数据估计结点温度. 这使得功率转换器的实时热量监测能够准确.

关键词:
在SiC MOSFET中使用.效率 效率 效率 效率 效率 效率 效率测量不确定性 测量不确定性换机损失 换机损失 换机损失虚拟交叉点温度是虚拟交叉点的温度.

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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:

  • 碳化 (SiC) MOSFET在功率转换器中提供了高效率和可靠性,特别是在高温下.
  • 准确的热模型对于估计节点温度和功率损失至关重要,切换损失评估尤其具有挑战性.
  • 实时交叉点温度监控对于优化性能和防止设备故障至关重要.

研究的目的:

  • 在SiC MOSFET中开发一个虚拟传感器,以实时估计SiC MOSFET的连接温度.
  • 使用一种新的数值分析模型 (NAM) 为SiC MOSFETs创建一个准确的热模型.
  • 通过半桥转换器的实验数据验证拟议模型的准确性.

主要方法:

  • 开发了一个数值分析模型 (NAM),仅使用数据表参数和电量 (总线电压和电流).
  • 在MATLAB中实现了NAM,其代算法捕捉了切换过渡物理.
  • 在PLECS中创建了一个全SiC板的数字双胞胎,将计算的能量损失纳入热建模.

主要成果:

  • 虚拟传感器通过利用随时可用的电气数据,准确地估计了接口温度.
  • 开发的NAM有效地模拟了SiC MOSFET中的切换损失.
  • 模拟结果与实验效率数据进行了验证,证实了模型的准确性.

结论:

  • 拟议的虚拟传感器和NAM为SiC MOSFET实时热监测提供了有效的解决方案.
  • 该模型依赖数据表参数和集成传感器,简化了功率转换器系统中的实现.
  • 精确的热建模对于提高基于SiC的功率转换器的效率和可靠性至关重要.