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Design Example: Automobile Ignition System

Design Example: Automobile Ignition System

The automobile's ignition system plays a vital role by ensuring the timely ignition of the fuel-air mixture in each cylinder. This ignition is facilitated by a spark plug, which is composed of two electrodes separated by an air gap. A spark forms across this air gap when a substantial voltage is generated between the electrodes, leading to the ignition of the fuel.
One can generate a large voltage using a car battery of 12 volts with the help of inductors. Inductors are known for opposing...

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Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

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使用微阵列石墨阴极的高压火花间隙的自分解统计数据.

Gang Wang¹, Jiancang Su¹, Wenyuan Liu¹

¹Northwest Institute of Nuclear Technology, P.O. Box 69 Branch 13, Xi'an 710024, China.

The Review of scientific instruments

|July 24, 2024

概括

微阵列石墨阴极显著提高了高压火花间隙性能. 它们提供了更好的电子发射,从而降低了10%的故障电压,并减少了90%以上的火花间隙开关的动.

科学领域:

电气工程电气工程
材料科学材料科学材料科学
等离子体物理学的物理学

背景情况:

高压火花间隙是各种高压应用中的关键组件.
实现稳定和可预测的故障对于可靠的运行至关重要.
传统的石墨阴极在电子发射和稳定性方面存在局限性.

研究的目的:

为了研究一种新的微阵列石墨阴极在高压火花间隙中的性能.
为了比较微阵列石墨阴极与传统平面石墨阴极的分解特性.
评估微结构对电子发射和分解稳定性的影响.

主要方法:

使用激光处理制造V型石墨微阵列阴极.
在充满的火花间隙 (0.2-0.9 MPa) 中比较分解电压测量.
将200千伏电压脉冲应用于两个阴极类型的开关.
对故障电压,最小故障电压和相对标准偏差的分析.

主要成果:

微阵列石墨阴极产生了更多的初始等离子体和电子,增强了电子发射.
在0.9MPa和200kV脉冲下,平均故障电压为91.7kV,相对标准偏差为0.4%.
与平面阴极相比,微阵列阴极显示了~10%的平均故障电压降低,标准偏差降低了>90%.

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In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices

In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices

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Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

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Published on: February 2, 2012

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Published on: March 7, 2022

In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices

In Situ Time-dependent Dielectric Breakdown in the Transmission Electron Microscope: A Possibility to Understand the Failure Mechanism in Microelectronic Devices

Published on: June 26, 2015

结论:

微阵列石墨阴极非常适合用于高压火花间隙电极.
微结构表面显著改善开关稳定性,并减少故障电压动.
这一创新为开发更可靠的低火花间隙开关提供了有前途的途径.